68 camaro twin turbo project,ls engine trying to mount turbos but not having much luck trying to keep the inner fenders and have room for the down pipes,its very tight on the driverside with the steering, what do you guys think,keep tryin or ditch the inners? Thanks

 

That's a tough one... If you can bring the manifolds forward and low then mount the turbos above them and run the downpipe back over the top of the manifolds.

 

the hard part is getting it past the steering shaft.

 

Street driven? then yes - work at keeping them.

 

yes primarily a street car and i like the looks with them in there vs out.

 

chop saw and mig welder.....

 

I have twins in my '69 Nova, but I changed to an aftermarket subframe with rack & pinnion steering in the middle of the build. I still had the same problem getting the driver's side down pipe routed past the steering shaft though. With my turbos facing forward, I used a 3" 45° bend off the turbo then leveled it back out with another 45° so it could pass under my brake master cylinder. Then I added a 90° bend at the firewall (between the engine and steering column) and a second 90° under the car to level it back. I had to add a v-band between the two 90° elbows for it to be removable. I don't have a picture of the final product, but here is an in-process picture of the DS downpipe:


I can feel for you trying to fit that with the rear-steer stock subframe. The aftermarket subframe really gave me clearance for the turbo plumbing. After taking my first short burst of wide open throttle this past weekend I can only say keep after the build. These cars are animals with twin turbo'd LS engines. Absolutely insane.

I'll throw up a recent picture of my engine compartment for any help it may give you. I still need to re-install the driver's side inner fender - it will need to be cut and notched for clearance around the turbo:

 

I have the stock subframe but have added a smith racecraft front steer manual rack setup,it makes it nice but still gonna be tight with the steering shaft and firewall back there.Ill keep messin with it and see what i can come up with but thanks for the pics,gives me a couple ideas.Do you have anything supporting your turbos and did you use mild steel or SS? Thanks

 

I used mild steel for my 2½" and 3" hot pipes. Right now I am supporting the turbos with an adjustable length rod from the frame to the T4 flanges.

 

If I can fit two downpipes and turbo's in an ls1 rx7, then surely you guys with your massive engine bays can fit them!