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89 IROC Twin Turbo LQ4 Build

Old 10-28-2015, 11:33 AM
  #101  
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Car: 1987 Z28
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Transmission: T56
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Re: 89 IROC Twin Turbo LQ4 Build

Wow the more you post about this thing the more I want it lol. Pretty slick setup/concept.

Jay
Old 10-28-2015, 10:41 PM
  #102  
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Re: 89 IROC Twin Turbo LQ4 Build

WEll I decided on going like your exhaust routing. Going to see if anyone wants to buy 3/4 of a fully welded dual mandrel 3" system with Xpipe and stainless mufflers with dual 3" that goes over the rear end.

Received my 4" tubing, dual 3" into 4" flowmaster Y pipe and my 4" dynomax SS ultra flow muffler. So well see how loud it really as its going to look exactly like yours. Do you have any sound clips of it running? I would love to hear it.
Old 10-29-2015, 09:26 AM
  #103  
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Car: 89 Camaro IROC-Z
Engine: Intercooled Twin Turbo LQ4
Transmission: Tremec TKO 600
Re: 89 IROC Twin Turbo LQ4 Build

Originally Posted by customblackbird
Do you have any sound clips of it running? I would love to hear it.
See post #71, there is a link of a video with it idling.
Old 10-29-2015, 12:34 PM
  #104  
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Re: 89 IROC Twin Turbo LQ4 Build

Thanks, forgot it was there and that yours is turbo'd so the exhaust is a good bit quieter than a NA/supercharged setup.

Thanks!
Old 11-01-2015, 04:46 PM
  #105  
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Car: 89 Camaro IROC-Z
Engine: Intercooled Twin Turbo LQ4
Transmission: Tremec TKO 600
Re: 89 IROC Twin Turbo LQ4 Build

I made a few pulls at the sloppy mechanics dyno day yesterday. It didn't make crazy power, but we had fun and had a nice drive there and back in my car. It was the first lengthy drive I took the car on (a little over and hour each way). I spun the tires on the rollers both times, the first pull spun real bad and put down 565hp. The second pull didn't spin much, and was 575hp. I was the 3rd car on the dyno (cold drum) and had new tires, so I think that hurt traction. I really don't think the tire slip hurt the power number much, especially on the second pull.

14psi, 12 degrees timing

I was hoping to at least match a factory Hellcat, but came up quite a bit short. There was one that pulled there later and put down 646hp. A little tuning should get me there I think.
Attached Thumbnails 89 IROC Twin Turbo LQ4 Build-10-31-15-dyno  

Last edited by 89JYturbo; 11-01-2015 at 04:52 PM.
Old 11-02-2015, 11:39 AM
  #106  
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Re: 89 IROC Twin Turbo LQ4 Build

Awesome, Respectable numbers for sure!

Jay
Old 11-04-2015, 08:49 PM
  #107  
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Car: 87 iroc Arctic White w/gold ss stri
Engine: Turbo'd 5.3 in process
Transmission: T-56 w/SPEC stage 3+ clutch
Axle/Gears: 9" Moser w/3.25's
Re: 89 IROC Twin Turbo LQ4 Build

What a beautiful car. Nice build! I am in the process of installing the ms3 gold box in my car now. How did you hide all the wiring under the hood? I see you also moved your brake proportioning valve. Where did you move it to?
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