In the coming months, I am going to start working on twin turboing my camaro. The build is going to be forged rods and pistons, 9.0:1 compression, AFR 195 heads, undecided on cam, HSR with Commander 950. I have experience with small blocks, I have experience with turbos, but not together. Anyways.......

-Has anyone been able to mount 2 T04's and retain factory AC?

-Also, how is your exhaust setup routed? I was kinda wanting it to where my spark plugs arent too hard to get to. Removing my downpipe to change plugs isnt my idea of fun.

-Would a tubular K-Member give me more room to route my exhaust?

-What kind of intercooler setup are you using? I was thinking of routing my charge pipes downward and to the side, going through two small intercoolers (like a Audi S4 would use) come up through the old battery tray, and meet in front of the throttle body. I am also thinking of running alcohol/water mixture to aid in cooling.

Sorry if these things have been covered, I have looked for the last few days and havent seen anything that really answered my questions.

 

I'll just say that I was unable to retain the factory A/C with twin t4's. It could be done by relocating just the condensor (getting custom hoses). I must remove the downpipes to change my plugs. my downpipes take 5 minutes to remove though, and as often as the plugs get changed, its not a big deal. after the downpipe is out the plugs are all very easy to get from the bottom and the front plugs are easy from top or bottom. (pictures are on the most recent page of the post pics of your power adder).

You could probably keep the A/C if you get a big cowl hood though. I have a stock hood.

 

Are you using V-Bands?

 

I also deleted the A/C on my IROC when I installed the twin turbos. It was my first turbo project, so I was learning along the way. One of the big mistakes I made was deleting the A/C. I have no doubt you can build a turbo system around the A/C components.

The twin intercooler idea sounds much like my car. I used two junkyard Ford Probe IC's for my car, though they are a bit small if you are after serious power. I have pictures of the charge pipe routing through the battery trays if you want to see it (I have them on my home computer, so I can't show them now).

Here are a few shots to give you some ideas:

System out of car

In car

Intercoolers
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Oh, and I can change all my plugs in about the same time as a stock L98 IROC. You can easily access all the plugs without removing either dowm pipe, though most of them need to come out from below.

 

no, the 5-bolt flanges, but all 5 bolts are easily removed with a rachet. Then you just lift them out.

 

Check this out

 

That looks great. What kind of turbos and how much boost and power do you make?

Thanks for all of your replys.

 

Boost is currently at 6psi. It put down 328WHP/467WTQ three years ago on a portable dyno at the Wildwood NJ cruise using junkyard Volvo T3s (restricted top end badly, TQ started to fall off above 4k R's). I've since upgraded to T3/T4 hybrids (TO4E 57 comp, T3 Stage III turbine in .63 housing). Runs consistant 12.5s at 115mph and gets over 20mpg on trips. It will be solidly in the 11's by the end of the summer; hopfully (see my seperate thread on that).
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That B&G kit is awesome. Are they producing them yet? Whats the price? Any running/driving examples out there yet for feedback/performance results? It looks like it is a real no compromises system from those pics.

 

B&G did a couple of single kits from what I heard but I have not seen feedback from anyone on it. The twin in the picture is mine. I had it mostly assembled and then decided to drop some forged pistons in my engine before I put it on the street.

I'm in the process of putting my engine back together now and will be putting the twin kit back on. I don't think they have done a twin kit for anyone else. It has twin t4 Precision 6032 ball bearing turbos and I get to keep the AC.

 

Cool. Make sure you keep us updated.

 

Keep me updated on what you do, cause that might be the same basic setup I go with.

You had a bone stock L98 and put down those numbers right?

 

Yes, that dyno pull was on a bone stock engine and junkyard turbochargers which I rebuilt my self. Best 1/4 with those turbos was 12.46 at 113MPH. When I repainted my car, I pulled the engine out since we were doing a color change and wanted to paint the engine compartment body color. At that time I upgraded the turbos to the hybrids and installed 1.6 rocker arms. Other than the rocker arms the engine hasn't been opened up since 1989. Stock throttle body, intake plenum/runners/base, stock heads, even the original exhaust manifolds were modified to mount the turbochargers.

I would really like to get it to the dyno again sometime this summer to see how the larger turbos effected the power band.

 

Here is a thread of a guy on turbomustangs that dyno'd his car. He is making some great numbers and has a real nice twin turbo on a TPI. Look for the video link in the thread.

http://www.turbomustangs.com/smf/ind...?topic=53065.0

 

Yeah, Marty is a cool guy. Those numbers were'nt on a stock L98 though, and the A/C and power steering are gone, but the numbers are very impressive. He damaged the built engine that produced those numbers, and is swapping in a junkyard 350 with small heads to see how fast he can go with junk. His threads are well worht reading through.

 

There is no good reason why you couldn’t do it if you wanted to badly enough… In my case I pulled the AC from my 3rd gens long before I got into any serious engine stuff, mostly because it didn’t work to start with and I didn’t see a good reason to justify spending the time/money fixing it on “toys”

WRT to fitting twins the driver’s side is much worse then the passenger side, and most of the AC stuff that would get in the way is on the passenger side, the biggest thing that you’d have to do differently then most people’s twin setup is send the downpipe on the passenger side down sooner…

 

My thing is I am in Florida, and this is going to be a 100% streetable car. Unless its 100% impossible, the AC is staying.