just had a quick question, what is the advantage to having a longer manifold that places the turbo in a different location. sort of how david buschur's white RS is setup???

Other than the fact that it catches more air from the front of the car that way. how is spoolup effected. also I know you cannot use a/c with a manifold like that but other than what I listed what are the advantages/disadvantages to a setup like that?

also it seems as though no stroker engines run a manifold like that. any reason why?

I noticed that AMS's drag evo has a simillar manifold of what I'm talking about but they're 2.3 liter time attack car is a twin scroll that places the turbo in a simillar location that their normal kits do.

 

Turbo manifolds can be tuned. The length of the runners on the manifold change power characteristics of the rpm range. Your changing the the flow characteristics and torque curve. The engine flows better ( think of it "breathing") when the large restriction to flow (turbo) is moved. The best position has to do with a few things such as desired power, accessory usage (A/C, Power steering etc), desired rpm usage, and type of racing planned to do. Buschur racing, AMS, and Full-Race are companies who have done good R&D. There are a bunch. Hope this helps, and Im sure others will chime in.

 

so in other words a long manifold with a collector housing would be a bad idea for a stroker because of it's limited rpm range???

 

bump for question above

 

for most strokers the simple answer is yes

 

length is about changing the timing of the back presssure Wave which interferes with the exhuast flow trying to escape. When the exhuast leaves the tailpipe at that very moment a back pressure wave is sent back. So during high RPM having a longer path for flow creates more time before the pressure wave can interfere with that flow trying to leave. So more power. of course having more AREA of a minfold is like what a TBE does, it helps the motor exhaul more easy.

 

in no fluid engineer but this is how I understand it from automotive engineering/tuning books.

 

I just talked to shearer about this question, and he said that a lot of times the manifolds such as david's RS are actually SHORTER than the standard manifolds in the kits.

it just looks longer because it is unwound and straighter.

how is the unwound manifold an advantage then? less backpressure because there are less bends?