thats a nice setup you got there. many people dont spend the time to fab something like that, thus it causes a measurable loss in power. But i would still like to see your downpipe vs a dump to atmosphere on a high power car, that could be interesting.
"The 1911 is a collection of subsystems that must work together. Each part must be prepared and fit properly not only in and of itself, but also with regard to the other parts with which it must operate for the gun to function and appear as desired."
Lets put it like this, Turbonetics, the big turbo experts, made 275 at 8psi with a BB 50 trim t3/t4 on a Spec V, their recirc and manifold are anything but ideal.Originally Posted by Danny
I made 271 @ 5 psi with the same turbo, except I used a journal bearing unit, 8-8.5 PSI I made 304 whp and spooled just as quick.
Open dump on these cars are good for about 10whp, that's it. 2.5L reliving manifold pressure out of a 1.5" dump tube sounds like total ****, I've run an atmo and a recirc on my car, recirc hands down.
The more restrictive your exhaust to start with, the more power an open dump will make. If you try to optimize everything from the get go, open vs recirc won't really be a big issue of concern to start with.
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