Question about single turbo setups...

On a single turbo setup I know that the turbo is usually ran off of the driver side header, but is their a crossover pipe from the passenger side header that feeds the turbo also so that all 8cyl. are spooling the turbo? And if their was a crossover pipe wouldn't this create a bottleneck on the exhaust outlet if it is anything under 4in. downpipe? I could under stand having dual 3in. downpipes on a TT setup without a restriction, but on a single wouldn't create a bottleneck?

On a side note, I know that their arn't any godd high horsepower single turbo kits for lt1's out there designed for 900+ hp. But are there any shops out there that will do purely custom setups if you have the $? Does anybody know of any that do this kind of work for LT1's?

Thanks for your time all responses are welcome,
PFC Powell Marine Corps

all the single turbo kits have a crossover pipe.

it would not work properly on only one bank of cylinders, so it HAS to have a crossover, or both banks feed directly into the turbo.


as for the downpipe, that depends on your power......there are plenty of cars (not just fbodys) running 500+ rwhp on a single 3" downpipe. im not sure how much you need for 900rwhp.

Just for reference Pro 5.0 cars have been restricted to a single 4" exhaust for the last two years and they still make 2400hp. I would think you can easily make 1/2 that with a single 3".

Proturbo systems makes an LT1 race kit, it's kinda pricey but it's nice. http://www.proturbokits.com/

Yea, no kidding. If one turbo can effectively do this....

www.theclashofthetitans.com/images/videos/vids/12.mpg

....why do some people feel they "need" twin turbos on a street car? Shoot I know of a few single turbo V6s and V8s that are "streetable" 8 and 9 sec machines. Many 800+hp turbo cars (be it V8s or V6s) are still using 3.5in downpipes on single setups without backpressure problems. Your turbine's A/R rating has a lot to do with that.

Are PTK's race kits custom built-to-order?

PTK does not make a race kit per say. Right now they offer just the street kit. They have though made a custom "race" kit with all 3" piping, larger intercooler, downpipe...etc...etc ;)

Jose