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

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Old 09-12-2016, 01:02 AM   #201
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)




Amazing what having the right company around will make you accomplish. Just need to pick up a few bolts on the engine can go in!
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Old 09-12-2016, 05:13 PM   #202
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Slow and steady progress is a good thing. I don't think those brakes are going to work on your car, but they will work on my car lol Looking good buddy.
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Old 09-27-2016, 11:48 PM   #203
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Finally back from my trip and got the Iroc back on the lift to install/finish the K-Member bolts. Getting the car from the stall in one end of the shop to the other with the lift was a chore. I had picked up some vehicle dollies at harbor freight (the heavy duty ones). They work great until you put the weight of a car on them. I tore them down, greased each wheel bushing and put them back together. At least I was able to move it then but it took a good bit of work. Finally got it lined up for the lift and went to work..

Finishing the k-member install turned into a mini-disaster. Two of the bolts (both main driver side bolts) were taking too many turns to torque. I stopped at 110 on the middle bolt but it was already feeling 'wrong'. I tried the front bolt to 110 but it let go before 100. The rest I stopped at 80 ft lbs. Everywhere I've read shows 130 ft lbs for the third gen. I'm reading up on some threads now of people with similar experiences to see what my options are. I'll weld that POS on if I have to.

Meanwhile I went to put the brake lines on from my old k-member since the previous owner of the tubular k-member decided to cut the lines instead of unbolting them from the proportioning valve (ironically I had asked for that valve too so clearly I was going to use it). No big deal I figured, just re-bend the lines from my car per the k-member instructions. WRONG. Different type of flare fitting on my car than his. He had reused his lines too, but they are threaded all the way to the end. Mine have a step before the threads start. They won't reach the threads on the braided lines that run out to the calipers. SMH.

Next up, I fought the engine mounts for a good hour to get the engine bolts to line up. Finally got the engine bolted in and had enough for the night.. perhaps for the week. UGH.

To cap off the already frustrating startup of work this week, the Pro-Flo Vortec intake I had ordered in early August ship date was pushed back yet again. I called Edelbrock and they said in fact it won't ship until at least early November. I realized the non-powder coated version was back in stock so I cancelled and re-ordered that one. I'll just get it powder coated locally at some point. So at least I should have an intake tomorrow.

Last edited by ZZ3Astro; 09-27-2016 at 11:51 PM.
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Old 09-28-2016, 05:44 AM   #204
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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
Finally back from my trip and got the Iroc back on the lift to install/finish the K-Member bolts. Getting the car from the stall in one end of the shop to the other with the lift was a chore. I had picked up some vehicle dollies at harbor freight (the heavy duty ones). They work great until you put the weight of a car on them. I tore them down, greased each wheel bushing and put them back together. At least I was able to move it then but it took a good bit of work. Finally got it lined up for the lift and went to work..
That's odd. I have the same dollies and use them to move my car around as well, never had an issue. How smooth is the concrete floor?

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Finishing the k-member install turned into a mini-disaster. Two of the bolts (both main driver side bolts) were taking too many turns to torque. I stopped at 110 on the middle bolt but it was already feeling 'wrong'. I tried the front bolt to 110 but it let go before 100. The rest I stopped at 80 ft lbs. Everywhere I've read shows 130 ft lbs for the third gen. I'm reading up on some threads now of people with similar experiences to see what my options are. I'll weld that POS on if I have to.
I pulled the trigger on the impact gun until the bolt stopped. Gun was set to 150 or so ft/lbs.

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To cap off the already frustrating startup of work this week, the Pro-Flo Vortec intake I had ordered in early August ship date was pushed back yet again. I called Edelbrock and they said in fact it won't ship until at least early November. I realized the non-powder coated version was back in stock so I cancelled and re-ordered that one. I'll just get it powder coated locally at some point. So at least I should have an intake tomorrow.
Those are cool looking intakes. I wish I had tried one.

-- Joe
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Old 09-28-2016, 10:18 AM   #205
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I dont remember the Kmember bolts being that high. I thought it was closer to 80ftlbs but Mine is a racecraft moly Kmember and uses much shorter grade 8 bolts. Stock is 130ftlb.
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Old 09-30-2016, 01:31 AM   #206
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Joe, from what I've read in various forums other people have experienced the same. My floors are smooth and painted. After greasing the bushings it's easier to move the car but still a chore to start it moving. I think casters with bearings instead of bushings would be a good start. Also the directional bearing is extremely notchy feeling with a little pressure on them by hand, so I'm sure with 200 lbs it gives a lot of resistance to turning as well.


I can't wait to see how this intake does. I will also do a comparison between this new vortec version and the non-vortect one my youtube friend sent me. Without having them side by side, I already noticed the injector "bump" at the top of the runner seems to be much smaller than the old intake. There is some core shift in the casting so I'll probably spend a while with the sander bits like I did on the heads. I'll try to get some dimensions before I do that.


Customblackbird - I wish I'd just stopped at 80 on all of them. I almost want to take the one bolt out that isn't as bad, just to look at the threads and see if the bolt was the failure point. They are grade 8 (or better) so I doubt it. Still undecided how I will handle this problem.
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Old 09-30-2016, 09:26 AM   #207
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I didnt torque my kmember bolts
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Old 09-30-2016, 11:49 AM   #208
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Every time I've ever had a problem like this it was using a torque wrench!! I'll have to reconsider doing things "the right way" moving forward. Some things it works well for, obviously internal engine fasteners and lug nuts.
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Old 09-30-2016, 12:15 PM   #209
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Exactly lol
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Old 10-01-2016, 07:49 AM   #210
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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
Every time I've ever had a problem like this it was using a torque wrench!! I'll have to reconsider doing things "the right way" moving forward. Some things it works well for, obviously internal engine fasteners and lug nuts.
I use the impact gun on lug nuts too haha. I told a Corvette guy that once at a car show and he looked at me like I kicked his dog.

When my family owned the dealership that's how we did wheels on literally tens of thousands of cars and never had a problem.

Then again, my mom always told me if I didn't study hard in school I'd end up "turning wrenches with the grease monkeys in the shop", so who knows.

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Old 10-02-2016, 05:55 PM   #211
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Intake is here and looks awesome. I have the transmission in now so I can mock up the turbo system to make sure there are no clearance issues caused by the new k-member. Once it's all together I am going to mark and shorten the crossover pipe so it doesn't hang down lower than the crossmember. At the same time I will mark and cut out the stock battery tray location to allow the larger compressor's 3 inch outlet of the 7675 to point beneath it to run to the intercooler. At some point I have to try and shoe-horn this new thicker radiator in as well, though I may drive it with the stock radiator for now and do the radiator closer to the spring warmup.


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Old 10-23-2016, 10:58 PM   #212
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Progress is being made but I've been sidetracked with getting the shop set up better. I had three rolling workbenches built and installed a 36 foot shelf across the back wall. Also added more outlets and set up my stereo. The floor is now clear! Everything is organized and I can get things done.


On the Iroc, I did a test fit of the turbo system and everything looks great. I do need to shorten the crossover tube so it doesn't hang below the crossmember, but I'm going to get it driving first. There are a few loose ends I need to address before proceeding with installing everything.. one of those was to deal with the brackets I built to support the weight of the turbo. I never painted them and they looked rusty and awful. One thing lead to another and I picked up a blasting box and a powder coating gun. Since my Brembo calipers look pretty bad (color and condition) I had already planned on having them blasted and powder coated. I also want to powder coat some other parts so I justified spending the money to set myself up for it.


So far, so good. I did the brackets first in a matte black. I ordered some gloss black and a chrome powder from Eastwood. That showed up Saturday so I took one of the old front calipers and bead blasted it and shot it in chrome. Then I masked off the chrome with a hand cut chevy logo (that means a crappy job of making it) and shot the black over it. It turned out great. I'm trying to fine tune the method I want to use on the Brembos before I start on them. Next up I'm buying a vinyl cutting machine so I can make IROC-Z labels that fit onto the calipers. They will most likely end up being done in black-chrome with silver logos and then a clear coat over them.


No engine progress yet.. Hopefully this week I'll get some things buttoned up.


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Old 10-24-2016, 12:42 PM   #213
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Looking good, keep slugging away at it!

Last edited by zz17iroc; 10-24-2016 at 12:49 PM.
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Old 10-30-2016, 06:35 PM   #214
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Several things going on.. I've been working on the powder coating process to establish the steps I need to get the calipers to the color I want them to be. I picked up a vinyl cutter and have been making some test pieces. I'm close to a final method and learning each day. Today I learned DO NOT put the baked pieced at the top of the oven. It's too hot up there and I ruined the clear and the test piece as a result. Still, I was able to get an idea of how it will all look when it is done.


Secondly, I've probably got a big surprise coming this week. Depending on how things turn out tomorrow, some of you could be really pleased or really shocked! Alternatively, nothing may happen at all if things don't line up right.


I haven't wrenched on the Iroc this week at all. Lots of other things going on and it's been hot again. Soon as it cools off I'll be working on it.


On to the powder coating tests... please keep in mind I was making no effort for a clean coating here. I was only trying to establish the steps needed to get the look I want. Once I have that sorted out I will make a 'perfect' test piece before I start doing actual calipers.





Coated with chrome powder, baked, and vinyl stencil applied.





First layer of chrome black applied.





Second layer of chrome black applied over everything. Ready for clear-coating disaster





Inside the wheel after the clear-coating mess up.. but gives and idea of the look. Of course the rotor would be nice and shiny behind it.
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Old 11-01-2016, 03:21 PM   #215
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

And the surprise has become a reality... out with the GT-R and in with:





This will put the Iroc back on the front burner of performance. I so like the S550 Mustangs though and a good chance I will get one in the next year or so. Hopefully the Iroc behaves so doesn't go the way of the GT-R for that event. I'd like to keep it around after all of this work.

Last edited by ZZ3Astro; 12-30-2016 at 02:23 PM.
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Old 11-01-2016, 03:28 PM   #216
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Very nice pickup Steve! I myself am going to wait for next Spring before I buy my next sports car because we're supposed to have a bad Winter, but damn, you're making me want to race to the dealer today lol. How the hell do you post a picture like that and not give any damn details lol? Did you at least upload a video giving a walk around yet on youtube?
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Old 11-02-2016, 08:20 AM   #217
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I'm working on a video. Right now just a video explaining my rationale for trading in the GT-R.


Car is a 2017 2SS Fifth Edition. It's just like getting in the GT-R (unlock buttons, push start, visibility, dimensions) but with comfort and modern features and of course less power. Everything is a trade-off. I miss the GT-R but I don't.


Now I've really got to get to work on the Iroc. Brake caliper fun going in full swing now.
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Old 11-03-2016, 02:44 PM   #218
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Nice!
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Old 03-07-2017, 06:59 PM   #219
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Took a break from the car stuff for a few months and now I'm finally wrenching on the Iroc. I'm going to just leave the 700R4 and 9 bolt in place for now so I can get the new engine combo running and see what it has. I'm not too far from being able to start it up, mostly just putting it back together.




I just have to get this Pro-Flo XT intake sorted out and mount it and then the turbo system. Most of the rest of it is back together now. I'm having a lot of little annoyances with the Pro-Flo.. just the various differences from the stock vacuum ports etc. And no way to make my 2.5" injectors work with the throttle/TV cable bracket. Now if I can find some 95 lb injectors in the picco style I'll be in good shape. I was hoping to use my 95 lb 2" injectors from the gtr (need two more) but doesn't look like they would let the fuel rail clear the bracket either.


Always fun, these aftermarket parts.
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Old 03-08-2017, 12:21 AM   #220
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Get to it, I am still waiting to come out of hibernation up here in the North personally.
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Old 03-20-2017, 08:46 PM   #221
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Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Progress! On top of the other 300 projects going on I have been steadily working on the Iroc for the past couple of weeks. I decided to use .5" injector extenders on the GT-R 95lb/hr injectors and run the fuel rail at the upper position. This means the included pro-flo throttle/tv cable bracket won't fit (at all) but I just got a small cnc plasma table so I'm going to make a new bracket that fits the stock 700r4 tv cable and the 98 LS1 throttle cable. I picked up an 86 LG4 upper radiator hose and using the stock ZZ3 water neck which just clears the throttle body. I had to drill out the lower throttle body bolt holes on the intake to widen them for the LS2/LS3 throttle body bolt pattern (will use nuts on the back side of the intake flange for the lower bolts).


Anyway it is very close to first firing.. I'm going to put the 65lb injectors in for first start. I need to address the following things:


Build new short fuel lines from rails to regulator/return line/feed
Adjust rocker arms
Modify end bolt holes for headers (vortec outer bolts are about 1 mm wider than L98)
Install headers/spark plugs/plug wires
Finish up power steering/AC compressor install and belts
Build new 3" charge tubing turbo to intercooler to throttle body


I also need to deal with the brakes and decide if I'm going to go ahead and put in the 9 inch now or drive it first. I also have that new radiator but in no hurry to deal with that either.


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