I just finished assembling my entire twin turbo set-up on the engine stand today. I bolted up the intercoolers, plumbing and exhaust. Here are some pics:

1)

 

2)
I can't wait to here this BOV. I hope it is louder than my Blitz BOV. It is a TurboXS type RFL.

 

3)
This is the business end of the system. When you want to scare those pesky imports, you flip the switch for the Q-Tec electric cut-out. Turbine whistle+V8rumble+loud BOV=

(I removed this image to obey the 3 pic limit)

 

Some of you may remember this engine being red. I liked the red, but I'm repainting the entire car in '02 Sunset Orange Metallic and thought the red my clash a bit. Thats why I changed it to the color you see here.

This was a quick mock-up, but when I do the final install I will clean things up a bit and replace some the the radiator hose with real turbo pressure hose.

I have more pics, but I have reached my 3 pic limit. I can e-mail more pics for someone to post if ya want to see some more.

 

Thats sick man.

How much did that setup cost you to build?

How much RWHP you expecting?

 

Looks great. If you have some good Hi res pic's e-mail em to me and I'll host em with the rest of the photos for you.

http://www.cecoatings.com/images/oth...onHurst89IROC/

OLD PIC's

 

You forgot to add, "Can you build me one?!?!?!" LOL
That is sick man, post a sound clip of that BOV asap. I wanna hear that thing!:hail:

This may have been asked before, but are those stock manifolds you used?? They look nice and I'd definitely pay someone to make something like that.

 

I will record and post a sound clip asap, but don't hold your breath. All those body panels in primer you see in the background of those photos is for my car, so it could be a while yet.

**-EDIT- I'm sorry, I just looked at those pics again and none of them show those primered body pieces- take my word for it though, the car is just a shell right now.**

The manifolds are stock L98 manifolds with the original outlets cut off and welded shut and turbo mounting pedestals welded on up front.

It cost me slightly over $3k to build the turbo system, but you could do it for around $2k with carfull shopping and forgoing some of the flashy stuff.

I dynoed the thing last summer on a 95° day and it put 328hp and 468ft lbs to the wheels. HP suffered because the turbos are undersized- the power band tapered off around 4500rpm, max torque was at 3200rpm. It is a low RPM torque monster. I am seriously considering swaping to larger T3 tubine housings and a T4 compressor, but I'm already over-budget on my bodywork, so that may have to wait 'till next winter

 

How loud is that thing through the cutout? Could you get away with it on the street?

 

Kenton,

Pic's are up.

More better pic's of the setup for everyone to see.

 

thats really nice man!!!!

 

With the cut-out open, the noise level is not too loud. Its hard to describe how loud it really is, as everyone's opinion on what is 'loud' is different. I personally didn't mind driving distances with it open- before I had the electric valve in, I would unbolt the plate for a whole weekend, then cap it up for 'daily' duty.

I would like to get a free flowing muffler to make it sound better with the cut-out closed. I currently have a flowmaster crossflow type muffler (I think it is an 80 series) and with the cut-out closed up it is very quite- it sounds like the engine is being strangled. I thought two import type mufflers might sound alright and also flow pretty well. I asked the guys in the exhaust forum, and the all thought that was an awful idea- but its my car I guess, so it doesn't matter what they think. Maybe I will try it.

 

i was thinking the loudmouth exhaust might be ok on a turbo car with no cats... with cats im sure it'd be very quiet, and i hear the loudmouth flows pretty well, but flow probably isn't as important since you can just open the cut out for racing

 

By 'loudmouth' do you mean those import style mufflers? If not, what are they?

 

SLP has a cat back for the LS1's that doesn't have a muffler, just resonator.

 

slp loudmouth's sound incredible....one of the more expensive brands though, but they make IMO by far the best sound

 

I hate the sound of the loud mouth.

I think it sounds too obnoxious, there are better sounding mufflers with better flow and cheaper prices.

 

Remember there are two turbos between the engine and the muffler . That will effect the sound coming out of the tailpipes quite a bit. Remember, a turbo is an effective muffler by itself, so a 'loud' muffler should not be obnoxious.

 

Well I hope you're happy! You just mad me ruin a perfectly good pair of underpants

 

My car has two turbos with 3" downpipes going into a single 4" and then into a Dynomax straight threw round muffler 4". You can fit your entire forarm right threw the muffler. The car isn't nearly as loud as my friends 99 firebird with shorty headers both factory cats and a SLP loundmouth.

 

Just curoius here what accesorie setup are you running, specifically where is you alteranator

 

I too am curious about accessories? Alternator? A/C? Air pump? Power steering?

I noticed a MAF. This system is very inadequate. What will you be using for supplemental fuel? With as much time and effort you've invested (it's obvious), please don't tell me an FMU!!!

 

is there two different types of loudmouth exhausts? my buddies 02 SS camaro has the loudmouth from the factory and it is fairly quiet... the only aftermarket exhaust that is NOT louder is maybe the magnaflow, thats why i said you could ditch the cats, and with the turbo's quieting it down it would sound pretty good

 

nice looking setup. what did you do to the motor to handle it and how much boost are you running with the pair?

 

The alternator is on there, it is partially hidden though. It is just below the MAF sensor. The power steering pump fits in the stock position on the lower left. Unfortunately, there is no A/C. I may have been able to keep it, but it would have added even more complexity. It made the project easier and neater to just delete it; however I do regret it sometimes.

Sorry to dissapoint you Willie, but I am indeed using a rising rate FMU- a Vortec Super FMU. I also am running a Vortex T-Rex inline pump (which I will soon replace with a good in-tank unit) and Ford SVO 24# fuel injectors. The computer is stock with no programming, and I am blowing thru the MAF sensor. I am not knowlegeable on computer programming, so that is why I didn't do so. Also, I originally created this thing without having internet access, so all I learned was on my own. I didn't even know you could reprogram the stock PROM until I joined TGO. Out of curiousity, what are the main advantages of a homemade chip? Why don't you like using a rising rate FPR? It has good driveability, performs well, and gets 17mpg if you stay off the boost (I have approx 5K miles on the system since I finished it last spring). I thought about upgrading to a programmable DFI or a Holly 950, but that gets pricey. If time permits I will look into burning my own chips, but I don't really know where to start.

 

The long block and TPI system are bone stock. It had 90K miles when I installed the system, now has 95K. The exhaust manifolds are even stock, modified to mount the turbochargers. I have it set to boost 6-7PSI for street driving. I had it set to 10PSI, but never pushed it very hard at that setting. The stock cast pistons worry me a bit, especially since I am just using the narrow band O2S for A/F ratio tuning. Timing is pulled out relative to boost with an MSD BTM.

 

hi, i am on my way to a Twin Turbo setup and was wondering where you got your intercoolers? or what kind they are so i can search and purchase online.
thanks a lot and Very impressive setup

 

The intercoolers I used are off of '89 turbo Ford Probe Gt's. Pulled one out of a junkyard for $20, bought the second one off eBay for $70. They seem to be a decent IC, as a lot of import guys use them for custom set-ups, but they are small. I measured a 2-3psi pressure drop from the compressor outlets to the TB, which I believe is about average, though not ideal. I did record some charge temps while making a couple hard pulls on a hot day, but I don't remeber the exact IAT readings anymore. I remember I was impressed at how low the charge temps were for junkyard parts.

 

That looks REALLY good. How much do you think that added to front weight of the car . I also hope you get more impressive results from the new setup. Even if you don't that's probably one of the cleanest twin turbo thirdgen I've seen on these boards!

 

dude thats just sick blow some **** away v-8TT very nice

 

I don't think I added any weight over the front wheels since I tossed the A/C and AIR pump to install the turbos. I also moved the battery into the spare tire well.

As far as the performance goes, I know it may not be stellar, but consider that its a bone stock TPI from the TB to the exhaust manifolds (exhuast manifolds were modified to accept turbos). I also run the stock computer and chip. My goal was to produce the JY twin turbo system for less than a supercharger kit, and out-perform the supercharger kits as well. The system cost approx $3000 initially, and produced consistant mid 12s on drag radials (best ET 12.4 at 113, best MPH 117 on a cool day, w/ street tires). This was all at 6psi boost and on stock suspension. I may be wrong, but I'm pretty sure there is nobody running those times with a STOCK L98 and Supercharger at 6psi, or for that matter at 10psi. I think I obtained my goal.

Since I ran the car last, I have added larger turbos and 1.6 ratio rocker arms. The turbos are hybrids with 57 Trim T04E (.50 A/R) compressors and stage 3 T3 turbines with .63 A/R housings. The center sections are ball bearing, and I got the pair for under a $1000 new! I modified the original T3 6psi wastegates to mount to the larger compressor. The stock cam with 1.6 rockers should make a good mild turbo cam with lots of LSA and decent amount of lift.

Finally, here is a pic to show that I am still working hard to get the thing done. It runs now, just a matter of finishing the body. (I don't think this pic does it justice, but here it is anyway)

PS- Dont mind the zip ties holding the MAF up off the alternator belt- its just temporary!

 

Looking good

You were running those .42/.48 turbos pretty hard before. From what I calculated the .60/.63 T3's im using will be borderline acceptable on a 350. Those hybrids should really liven things up.

Do you happen to know what intake temps were like with the smaller turbos?

 

.60/.63s are a lot better than borderline acceptable heh.

take a look at toohighpsi.com
crazy joe's mustang is running .60/.63s froma junkyard on a 351 van motor pulled from a junkyard and freshened up a bit with a custom intake...9s at 134 miles an hour.
I'm pretty sure a 350 puts the 60 trim T3s right in the middle of their efficiency island, though i haven't looked at a map in quite some time.

 

I measured the intake temps a year and a half ago, and I remembered they were lower than I had expected (considering JY intercoolers mounted on such an angle in front of the tires). However, I cannot remember any #s. For some reason I'm thinking 138°F during a hard pull, but not sure.

BTW, how is your TT project coming? I haven't seen any pics of it yet- did I miss them?

 

89JY:

Ehhh. . .its coming. I should have pics up sometime soon hopefully. Its actually all physically built, im just tinkering with tuning it. I'm running quite rich everywhere but up high at boost, where its leaning out. So its just a matter of finding time to tweak the ve table. Also my accel enrichment dumps crazy amounts of fuel, so it will bog when you mash the gas, then accel will turn off, and it will pull like it should.

I've just decided I will be trying to find an NPR intercooler asap. I toyed with the idea of putting 3 dsm cores together (which i have 2 of that will probably be for sale if anyone is looking) or cutting up a powerstroke IC. I even made some cardboard mock ups to see what would work best. Basically the powerstroke was just way too huge and the dsm cores is a lot of fabrication (which i can't do myself, no ac tig). When i tested my NPR mockup, it was obvious I had to do it. It will mount to where the ac condesor goes and will tilt forward about 30* to line the inlets up a little better. It will be the big NPR with 2.75" pipes and 19.5x14.5x2.5 core.


Jay:

i suppose you're right about the turbos. For some reason when i calculated it out with a map, i remember the top end being a lot closer to the choke line But that was back when i was young and stupid.

 

OMG!!!!! I love it you are inspiring me to keep pushin mysle fto my TT set-up. If its no problem could you PM me info on what turbos u used, how selected them, and what all is needed to build up one of these?

AWESOME!!!
Jason

 

I hope your kidding.... TurboXS sucks and Leaks Blitz is much better. The best BOV on the Market
1# Tial
2# Greddy Type S (IF you have a huge turbo set(lots of boost) up you might want to think about using 2 BOV's

 

NPR IC is probley not the best IC for you.. A customer of mine had it on a ford probe with a 60-1 and it heat soaked a lil ,I take it your on a tight budget? how much did you pay for it? Can you post pic

 

I have to agree that the slp loud mouth sounds too loud and raspy. the guy who lives right by me has a ss with the loud mouth and everyone around here hates it. he has to drive it all around here all day and night..... and there are trucks around here with no muffler that sound better. with a turbo before it it may sound pretty good but who knows? all I know is peaople are pissed off at his noise level

 

Yes, I'm finding out that the TurboXS BOV is not the best quality. I haven't had a problem with it leaking though- was this for extremely high boost applications? They claim it to be good for 10 to 25PSI, and right now I'm only running 6-7psi (12psi is coming soon). How do the Tial and Greddy sound, and where is the best place to find a good deal on one?

 

The best place to find one is here--- Straightlinespecialties.com

They both sound awesome!!!

TurboXS suck!!!! bad choice

 

Excuse me if I just don’t get it, but I’m having a hard time believing that we’re having a discussion about the sound of blowoff valves. That’s only about ½ a step short of who makes the best sounding turbo whistle for your tailpipe and what fart can it sounds best with…

 

 

Come on now, you can't tell me you wouldn't want to release a sweet sounding BOV right beside a decked-out import or a Mustang!?

 

no, I would perfer to be in front of them before I even hit second gear

yes, It would be nice to roll up to one and give them something to think about

 

Hi 89YJturbo,
I used a Tial BOV in the single turbo setup I had in the 87' GTA, you can check the sound of it in the dyno run I made and got in video at;Dyno Run Video

That Tial valve dosent make any extraterrestial sounds but it sure's sounds very loud.

Hope this will help you,
Edgardo

ps: the Tial BOV has very good construction, its all CNC machined, high quality craftsmanship, the best BOV I ever had.

 

I just love the way you put this!



Thanks BBSD for the info. I haven't decided yet wheatehr or not to replace the TXS BOV, but I am considering it. I bought it to be noisey, but I don't really like the sound it gives on my turbo Cavalier (don't have the Camaro running quite yet- maybe it will sound better on it).