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Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Old 04-19-2017, 01:03 PM   #251
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Quote:
Originally Posted by customblackbird
Car and turbo sound amazing tho. A bit loud (exhaust for me) but the turbo spool is a beautiful thing. I wish I would have went turbo over my Supercharger now.
Still time man, could get it done in a weekend, and that SC will sell very fast. Steve's sounds that way though because he has it setup like a pinwheel lol, once he connects the intake and exhaust to the turbo it will spool slower and quieter. I say go for the turbo though, you'll love it...
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Old 04-19-2017, 10:55 PM   #252
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Old 04-20-2017, 09:08 AM   #253
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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I wish I would have went turbo over my Supercharger now.
Why? Your car runs and drives and is dead reliable.

-- Joe
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Old 04-20-2017, 02:42 PM   #254
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Joe, and 0:05 seconds into the video, stare at the passenger rear tire area.

They looked like they got blown out of the exhaust...

Quote:
Originally Posted by ZZ3Astro
https://youtu.be/a6bqU0CP-wc
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Old 04-20-2017, 04:38 PM   #255
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Originally Posted by Street Lethal View Post
Joe, and 0:05 seconds into the video, stare at the passenger rear tire area.

They looked like they got blown out of the exhaust...
Wtf..

That's the type of stuff that would happen here. Speaking of which, I gotta go take care of the barn.

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Old 04-21-2017, 01:03 AM   #256
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Hahaha.. they are my three chicken spider patrol! They come in the shop and turn black widows and other spiders into poop. I think it is a good trade!
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Old 04-26-2017, 09:03 AM   #257
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

i have a question for you turbo guys... how in the heck do you keep the car cool? i'm running stock dual fans and it seems if i don't have both running constantly i can't keep the car cool. the other day i had only 1 running constantly and the car shot up to 240 or so degrees and then the idle was rich/and lean which i assume is heat soak. i let the car sit for 45-60 minutes and the fuel rail temp was around 165 degrees...

i have no room for a bigger radiator aside from going custom due to the outlet hose hitting the supercharger pulley
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Old 04-26-2017, 09:09 AM   #258
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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i have a question for you turbo guys... how in the heck do you keep the car cool? i'm running stock dual fans and it seems if i don't have both running constantly i can't keep the car cool. the other day i had only 1 running constantly and the car shot up to 240 or so degrees and then the idle was rich/and lean which i assume is heat soak. i let the car sit for 45-60 minutes and the fuel rail temp was around 165 degrees...

i have no room for a bigger radiator aside from going custom due to the outlet hose hitting the supercharger pulley
You should start a new thread, starting with pictures of your engine bay.

I've struggled with heat issues. Air filter placement is a big part of it, and tune.

The car runs best on a tune that creates the most underhood temp. Can't f'n win.

My water temp never goes above about 195, but the radiant temps in my engine bay are insane.

I also have aluminum heads, and big aluminum radiator. Dual spall fans.

I had pulley interference with the upper hose/outlet as well when I had the procharger. When I switched to the vortech I mounted it on the passenger side.


-- Joe
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Old 04-26-2017, 09:13 AM   #259
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I haven't had any issues outside of the hottest summer days while running the AC. It may have been close to overheating in heavy traffic backup on a hot summer day a time or two. I'm running stock radiator with fans from a Dodge Intrepid. Also I did have more cooling issues when I initially installed the intercooler. I ended up remounting it slanted outward at the bottom. This lets some cool air bypass the intercooler which really helped, but at the cost of about 10-15 degrees IAC. One other thing, I cut a hole in the crash bar between the fog lights. In the summer I remove the fog light trim which opens up that whole area for air flow to the intercooler.
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Old 04-26-2017, 09:22 AM   #260
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I have been starting the Iroc up for people to hear how the new setup sounds. Yesterday out of the blue it has started backfiring randomly. Going to be fun to figure out what's going on there. I have played around with the tune slightly but I don't think that is the source. This megasquirt is already up to its old self with one start being too rich and the next day too lean. Can't wait to move on from that nonsense.


Ordered on received a new Spohn Pro-Series torque arm
Ordered the supposedly correct front brake lines
Ordered a cobra head intake elbow 4" to 5" along with appropriate 5" conical filter
Received the rest of the charge tube silicone couplers/elbows


Still trying to get this POS Baleigh plasma table working so I can cut out a bracket for the throttle and TV cables. Need to get the throttle cable installed to the pedal. Still looking at a couple of weeks to get it going and that is assuming I can resolve the backfire issue easily.
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Old 04-26-2017, 10:40 AM   #261
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Why? Your car runs and drives and is dead reliable.

-- Joe
Well it was lol. Now with the custom cam I've lost alittle drivability. Now going Air to Water IC to free up space in front of the rad. I went from 11.8psi at 5500rpms with the stock motor down to 7.8psi at 5100rpms with the new cam (214/228 .561/.561 115.5+4.5) and ported stock heads. But what kills me is the BOV noise. they are open at idle and under most throttle till right before boost. Sounds like a street sweeper, but Ive found that wrapping filter foam around the BOVs muffles them greatly. Still tuning it but Turbos are so much quieter for 90% of street driving.
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Old 04-26-2017, 10:46 AM   #262
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Originally Posted by ZZ3Astro View Post
I have been starting the Iroc up for people to hear how the new setup sounds. Yesterday out of the blue it has started backfiring randomly. Going to be fun to figure out what's going on there. I have played around with the tune slightly but I don't think that is the source. This megasquirt is already up to its old self with one start being too rich and the next day too lean. Can't wait to move on from that nonsense.


Ordered on received a new Spohn Pro-Series torque arm
Ordered the supposedly correct front brake lines
Ordered a cobra head intake elbow 4" to 5" along with appropriate 5" conical filter
Received the rest of the charge tube silicone couplers/elbows


Still trying to get this POS Baleigh plasma table working so I can cut out a bracket for the throttle and TV cables. Need to get the throttle cable installed to the pedal. Still looking at a couple of weeks to get it going and that is assuming I can resolve the backfire issue easily.
You should check out the new FITECH self tuning ECU and harness and its capable with boost. $750 for the harness and PCM without tranny control and $999 with tranny control. Another option vs the MS stuff.
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Old 04-26-2017, 12:28 PM   #263
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Quote:
Originally Posted by 86Z
i have a question for you turbo guys... how in the heck do you keep the car cool? i'm running stock dual fans and it seems if i don't have both running constantly i can't keep the car cool. the other day i had only 1 running constantly and the car shot up to 240 or so degrees and then the idle was rich/and lean which i assume is heat soak. i let the car sit for 45-60 minutes and the fuel rail temp was around 165 degrees..
Depends on the setup. If you're running a 160 thermostat, and have your fan(s) set to come on at 190 degrees, and turn off at 170 degrees, and if you are running the proper coolant mix, and you're sure that your lower radiator hose is not collapsing behind an engine load and that you have the proper air dam underneath the radiator, then it more than likely sounds like a timing issue. Start pulling timing in certain areas in the SA Main table to see if that helps. Also, I am running two fans as well, and both are wired to come on and shut off at the same time. One small fan is not enough for the increased horsepower while running the stock sized radiator...
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Old 04-26-2017, 12:30 PM   #264
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Quote:
Originally Posted by customblackbird View Post
You should check out the new FITECH self tuning ECU and harness and its capable with boost. $750 for the harness and PCM without tranny control and $999 with tranny control. Another option vs the MS stuff.


Hmm that is interesting, particularly having transmission control capability. Will keep an eye on that.


Turns out my plugs are completely fouled out from yesterday's ultrarich startup. I don't understand how things could be so radically different between two different days of starting it up. Off with the downpipe so I can change the passenger side plugs. Brand new plugs too! Oh well.
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Old 04-26-2017, 12:31 PM   #265
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Originally Posted by ZZ3Astro
This megasquirt is already up to its old self...
Get rid of it Steve (I can hear Joe typing already lol)....
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Old 04-26-2017, 01:37 PM   #266
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

i got a fast xfi for sale.... lol
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Old 04-26-2017, 01:45 PM   #267
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Get rid of it Steve (I can hear Joe typing already lol)....
Haha.

I had an IAT sensor go bad the other day and I couldn't even move the car out of the shop.

The air correction functionality is nice, until it leaves you stranded.

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Old 04-26-2017, 05:18 PM   #268
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

zz3 astro i just saw your youtube video on the intrepid fans... are you still using them?
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Old 04-26-2017, 05:38 PM   #269
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

So far they are still working. I have a new (to me) radiator and fans to put in some time later this year though.
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Old 04-26-2017, 06:27 PM   #270
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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So far they are still working. I have a new (to me) radiator and fans to put in some time later this year though.
cool, i enjoy your videos... i found a local yard with the intrepid heavy duty 6 blade fans for $40.00 i'll grab em tomorrow.
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Old 05-09-2017, 12:42 PM   #271
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I'm at a holding point at the moment.. ordered some brake lines from flynbye.com and I don't think they are the ones I should use. But he isn't answering and doesn't return calls. Flew my cash in and said bye I guess.


I did move the Iroc under its own power yesterday though! I used the ebrake and just put it in and out of neutral and drive to get it back in the shop. Fun FUN Fun!


Plasma table is gone gone gone.. well, going back to Summit for refund. Not sure how I will handle the throttle cable bracket now. May have to just hand fabricate something but it won't look as nice as I had planned. Got the cobra head intake parts in - wow looks very nice. I now have all of the parts I need to get it driving except the correct brake lines. Will be working on it all this week as time allows.
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Old 07-06-2017, 10:10 AM   #272
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Wow two more months?? Really? Where does time go? Well I have been extremely busy. I mean REALLY BUSY but a lot has happened in that time:


We fixed up, cleaned, staged and listed my girlfriend's house, by owner. Thankfully our hard work paid off and it was under contract 24 hours after listing it. I've been very busy working with the agent and buyers to get inspections etc handled. Now we are closing early so we are busily moving things out - including that LSX454 WS6 which is now sitting in my shop.

Also during this time I took my boat off the market, fixed a bunch of little $100 issues to the tune of about $700. I relisted it and sold it and just got the deal closed last week.


We have also been shopping for a newer vehicle for my girlfriend and I have been kicking around the idea of buying something cheaper with the boat money and offing the 17 2SS. Well it has started having a problem at 4k miles with the transmission where it shudders during shifts. It is progressively worse with each mile. I was already turned off to that car for some reason and planning to sell this year. I haven't even spun the wheels or raced anyone and it's already broken. So I found a little turbo 4 cyl vehicle and I'm trading the 2SS on it. Bye bye another 40k of debt.


So that is why no progress on the Iroc, but I promise it is coming as I remove various other distractions from my life.
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Old 07-07-2017, 08:32 PM   #273
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Op is fooling himself if he thinks hes gonna sell the Iroc.
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Old 07-07-2017, 11:13 PM   #274
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Subscribed, love your iroc. Used to live in your area, went to Rutherford high school. Sure miss living there.
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Old 07-20-2017, 10:03 AM   #275
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Update... The 17 2SS is long gone. Replaced with a Ford Escape! And I actually really enjoy driving that thing around (Ecoboost 2.0).

In the absence of having a go fast car, the Iroc has finally started getting some real attention. This week I have re-installed the oem torque arm mount (I'm staying 9 bolt to get it driving then doing to the 9 inch install), flipped the intercooler to its new position and fabricated new upper mounts for it, and started building the new 3 inch intercooler piping. I'm down to just the last couple of pieces between the intercooler and throttle body. Also got the new 4 inch cobra-head air filter installed and it first GREAT!




Up next is building lower intercooler supports, hanging the nose back on the car, connecting the LS throttle cable to the pedal and building a bracket for the TV cable from the 700r4. To get it driving I'll then be down to some tires and finishing the brake bleeding along with the obvious tuning.

After some driving I will be starting on the 9 inch along with the new torque arm and SFCs. One thing holding me up on the rear are the brakes. I think I want to downgrade to something that will allow 15 inch wheels on the back. Right now I'm stuck with 17 inch or larger. I'm undecided if I can get the kind of 60 foot I want with 17's. I plan to run a trans brake and all with whatever transmission I end up with. I want the wheels off the ground so I feel like I need 15's.
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Old 07-21-2017, 10:46 PM   #276
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Some real progress this week. I have all of the intercooler plumbing figured out and cut. I ordered a bead roller so I won't have it completely done until next week. I think I have the LS1 throttle cable installation sorted out as well. Just need to make the TV cable bracket and deal with the brakes now and she is ready to roll.

Here is the new look! I'm really happy with the cobra head intake and new filter. It should really breathe good and finally get nice cool air like my original setup did before I built these headers.


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Old 07-25-2017, 10:41 AM   #277
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Caught your newest video Steve after logging onto youtube for the first time in forever. I told you it would sound different once the intake gets plumbed and the turbo is no longer acting solely like a pinwheel lol. Still sounds good though, and it's coming out great...
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Old 07-25-2017, 11:13 AM   #278
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Ordered some new Z rated 95Y tires for the front wheels (17's). Yes I wanted 186 mph tires because I am hoping to bring this car to a half mile event where I will shoot for 170 mph (after the new engine build coming next). Should have them mounted today so I will likely drive it around the block by Friday!


I'm still trying to come up with a plan to bring this car to 1000 hp and I'm troubled by the lack of a one piece gen1 after-market block. I feel like two piece RMS is going backwards, not to mention the driver side dipstick that may interfere with my headers and needing yet another flexplate and starter. I would love to go LS to short-cut these add-on expenses but then you start getting into a whole new set of expenses and issues with fitment etc. Am I missing something? Or is there a 1 piece rear main block that can handle 1k?


I'm pretty sure I'm going to go for a 4L80e and self build it with Dana's parts. I will add a transbrake valve body, a high end converter and probably a Microsquirt controller since it's down to $500 now and works with my MS2 through CAN. Later I will go Holley Dominator. I did the math on a TH400 and I can't get the top speed I need for the 1/2 mile events. Plus I have a 4L80 sitting around and I can do the whole build with converter/controller/brake for under $4k
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Old 07-25-2017, 11:35 AM   #279
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

you could run a dart SHP 1 piece block and probably be fine.
i think i would probably spring for a lil M or iron eagle though if my money was right. many of those blocks/motors floating around in running condition too, which will usually come out much cheaper than building from scratch.

i got a factory 4 bolt LT1 block from a friend that has seen over 1000 whp at 25# boost through a glide. there was a mishap that took it to 35+# once. it is short filled to the freeze plugs.
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Old 07-27-2017, 07:39 PM   #280
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I agree after researching.. the Little M is the way to go if I stay Gen 1.


Iroc is driving! I've been around the block three times and up the highway once. Feels pretty strong at 8psi but I got right into the rev limiter (tpi friendly setting). I've expanded the tables to 6800 rpm now. Spooling seems real good - not instant like the old setup with the 67 but more than fast enough to be a burden on traction. It wants a tremendously higher amount of fuel across the board so I can tell this engine is now breathing.

Something is wrong with the k-member though. It's popping and creaking like something is loose. Back up on the lift tomorrow to see what is going on. Brakes are fantastic feeling compared to stock. I haven't tried anything hard yet because of the front end problem but they feel much more willing to slow the car down for a given pedal pressure.


It is still too early to know if this combo is finally going to unleash the power for this car. I'm running 8 psi for now until the tuning is good.
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Old 07-27-2017, 08:06 PM   #281
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I ran a dart shp to 1200 whp. It lived but caps walked hard. But that could have been flex from crank. But nothing wrong with 2 pc rms systems. 1000 hp is fine
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Old 07-27-2017, 09:11 PM   #282
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Love that car... how is the big block project going?
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Old 07-27-2017, 09:38 PM   #283
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Slow lol hoping to get block and parts over to machine shop later this fall. But we shall see
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Old 07-28-2017, 11:00 AM   #284
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Quote:
Originally Posted by Orr89RocZ
Slow lol hoping to get block and parts over to machine shop later this fall. But we shall see...
Why not buy a beater, slap a turbo on it, and have fun w/the rest of the summer. Not used to you not having a car to drive, been a little too long for that Justin...

- Rob
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Old 07-28-2017, 01:00 PM   #285
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Quote:
Originally Posted by Street Lethal View Post
Why not buy a beater, slap a turbo on it, and have fun w/the rest of the summer. Not used to you not having a car to drive, been a little too long for that Justin...

- Rob
No money for that but honestly thinking of throwing the spare 305 i have together and throw on the s480 turbo i have. Reuse lot of the stuff from last build for exhaust/wastegates/etc

It be stock bottom and i need a intake manifold. Figure i can find a tpi setup somewhere cheap. Or cheap single plane and elbow again
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Old 07-28-2017, 01:26 PM   #286
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

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Originally Posted by Orr89RocZ View Post
No money for that but honestly thinking of throwing the spare 305 i have together and throw on the s480 turbo i have. Reuse lot of the stuff from last build for exhaust/wastegates/etc

It be stock bottom and i need a intake manifold. Figure i can find a tpi setup somewhere cheap. Or cheap single plane and elbow again
I'd like to see this.
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Old 07-28-2017, 03:37 PM   #287
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Me too! Would be fun to do a when will it blow kinda thread on that 305!
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Old 07-28-2017, 03:45 PM   #288
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

It's what I'm planning to do, but with all the work I have to do around the house right now, I'll be another year until I get to it. I'm gathering parts and have an 82mm billet wheel Borg Warner turbo already.
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Old 07-28-2017, 03:53 PM   #289
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

We shall see. Any money spent there takes away from getting the bbc in all motor. I have everything basically except cam and head/main studs and gaskets basically. Just needs taken to machine shop. But still long way off before it would ever run. Dont have efi system.
For the 305 i have my 411 pcm stuff still
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Old 07-31-2017, 04:01 PM   #290
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Had a little out of town trip this weekend but today I'm back at the Iroc tuning. Feels pretty impressive with 9 psi, especially now that I removed the 6000 rpm limiter. It was getting into the soft and then hard limiter before and now it just pulls like crazy. I haven't turned past 6000 yet and I'm not sure how this cam will let much happen there anyway. It is a sort of mechanical rev limiter for this mostly stock ZZ3 bottom end.


Based on fueling numbers I'm making around 550 crank hp at 9 psi and I'm not optimized on the tune yet. The first time I spun it to 6000 without the old rev limiter in place it really impressed me. Spooling isn't instant any more but it comes up quickly and it just seems to pull no matter what the rpm is.
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Old 07-31-2017, 08:08 PM   #291
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Very curious to see the numbers that setup runs now
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Old 08-01-2017, 08:04 AM   #292
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Quote:
Originally Posted by Orr89RocZ
No money for that but honestly thinking of throwing the spare 305 i have together and throw on the s480 turbo i have. Reuse lot of the stuff from last build for exhaust/wastegates/etc

It be stock bottom and i need a intake manifold. Figure i can find a tpi setup somewhere cheap. Or cheap single plane and elbow again...
Putting it together to see when it blows up or how much it would hold would be ridiculous and a waste of time, that is part of the reason why I slowed down my build because my wife was like wtf you're building an engine and wasting money to entertain out of state people you never even met lol. We both know when a cast engine will give up the ghost, either the rings will pinch the piston, or the cast material will get beaten to death, it doesn't matter what the size of the engine is. Anyways, I think you should drop it in and have some fun. You live close to me, well, a few hours, but I am hopefully running CustomBlackBird on the street to have some fun against his LSX, so slap yours together and lets go hunting.
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Old 08-01-2017, 08:11 AM   #293
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

It be the grenade 305 edition. I think i could make over 500 whp with it and survive long enough. I think that would be pretty respectable. Maybe 600 on dyno glory pull. It be cool but blowing it up could take out my trans and turbo so i am hesitant. I'll probly end up just saving cash and getting the bbc done this fall. Should make 750-800 by itself and rock that for awhile
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Old 08-04-2017, 01:35 PM   #294
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

The rain just won't stop around here. I have done a bit more tuning since the last post but mainly have focused on getting the rest of the small work done. Mainly I need to build lower brackets for the intercooler and needed to work out the TV Cable linkage. Little did I know at the time I started but the throttle arm on this new throttle body is aluminum. I kept trying to weld to it! Once I sorted out the issue I drilled and tapped it and made an arm out of flat stock steel for the TV cable connection. Still fine tuning the position so I just have the link fitting tacked on the flat stock for now. I was also able to weld the stock TPI tv bracket to the Pro-Flo's throttle bracket. I think I am going to add one more brace and then will blast and powdercoat it.





Anyway it seems the Iroc is running pretty well. Lots more tuning and changes to come but it is nice to be back on the road. Now I can start to spend some time on my 49 build.
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Old 08-04-2017, 03:04 PM   #295
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Looks good but the TV cable seems high. I think it needs to be lower in relation to the arc of the cable. The bolt on TV Made EZ stuff puts the TV cable right behind the lower TB throttle cable hole. So I think yours should have been backward a bit.

I have the WARR 92mm TB and I'm about to start my TV cable bracket as well. Yup the throttle Cam is aluminum on these. My design uses the pressed in cruise control stud as a pivot and I will drill and tap the aluminum throttle cam for a hold down bolt.
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Old 08-06-2017, 10:20 AM   #296
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Yeah I agree it needs to be lower. I am looking at my options for a lower support point as it will have too much flex if I simply hang it lower. The injector rail bolt might be an option. I would have to build a two piece bracket though because the bolt goes to a nyloc nut behind the rail and would be impossible to remove without pulling the whole rail.


Finally drove the Iroc to town last night to a local car meet. Wasn't anyone really there but the Iroc did great. Hard to believe all of that power is sitting there but it can be so smooth and quiet with the cutout closed. Opening the cutout unleashes a lot more noise than it did with the previous combo. Working on getting some driving around video up soon.


Also I just picked up a donor vehicle for my 49 Chevy! It isn't going to be LS. I decided to use a Vortec 4200 straight six for it. Turbocharged of course! Something different and I think more fitting for a car that was originally a straight six.
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Old 08-06-2017, 08:05 PM   #297
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

You seen these threads? I know you're not going with a thirdgen, but might have some good info.

https://www.thirdgen.org/forums/engi...-inline-2.html


https://www.thirdgen.org/forums/engi...ec-4200-a.html
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Old 08-07-2017, 10:06 AM   #298
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Was not aware of those two posts.. thanks!
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Old 08-07-2017, 11:43 PM   #299
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Not the best or longest video by far... my Gopro decided to stop working so I didn't get the POV video I was hoping for. I don't like holding the camera and driving this car any more. Tune is barely in ballpark - especially the accelerator enrichment. Also was around 10.6:1 at full boost (9.5 psi). Still it was making really good power and the transmission is very upset with me going into third. I can't imagine it would be any happier with another 6-8 psi so I'd better get busy planning that new transmission build.


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Old 08-10-2017, 12:27 PM   #300
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Somewhat disappointed after playing around with my friend's SRT 392 on some rolls. It looks like I'm right at the same power level as the old setup (18 psi) but I'm doing it at 9.5 psi. I'm also very rich at boost (10.4:1) so I have some additional power left on the table there.


Based on the performance I'm seeing now I will make 575-600 rwhp at 15 psi and 730ish at 22 psi. That's about 850 hp so not too bad. The problem is when I go to the 9 inch I'm going to lose some rwhp and certainly when I go to a bigger transmission I will. Then there is the whole 120+ lbs of extra weight to slow me down. Considering I'm slipping bad in third, all of the above will be on the car asap.


I'll be lucky if I can get the stock bottom end into the 10's with the extra power that will be needed to spin the new running gear. I keep kicking around thoughts about those 'stock bottom end' LQ's that are running mid 9's no problem with a cam and heads. Sure is looking like a short-cut to actually being fast! LOL
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