Thread: Rear Mounted Turbo Set up

Just a few conversation points that I've always wanted to discuss about this bit of kit....

LAG - you know, I bet the volume between a standard FMIC unit and the piping-only of the STS-type kit would be comparable. Agreed?

OIL PRESS - this would be the only thing I'd be worried about. Since it's below the oil pan, pump, etc., does this mean that there's no problem keeping pressure high enough, even though the distance is so long?

TURBO DESIGN - Since heat use will be almost 0 (distance from head to turbo) does this mean that you'd have to design a turbine housing to correspond to this change? It was always my understanding that turbochargers get some of their relatively good efficiency from using heat to keep flow up. Or, could you just heat-wrap the hell out of your exhaust and hope for the best?

Just some things I've always wondered - help me out.

Thanks!
///h

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they seem pretty wicked

they use oil pumps to pump the oil back

ive seen this on a bmw E30 also but it did have quite some lag.

I work with a bunch of GM nuts and they all rave about this setup. It does make great power for thier cars. However, thier cars are most efficient producing torque in the low rev range at wot. So, add boost on top of that rev range in the mid-high to high range and it will feel like there's no lag at all. This doesn't seem like a good idea for an engine that makes most of its power in the mid to high range to begin with. Plus, as mentioned before, the amount of heat after that much exhaust pipe is reduced quite a bit. Those engines make enough heat to compensate for that heat dissipation due to having around 3x the amount of displacement as ours to keep the heat energy up to an acceptable level through that much piping.

that's my 2 cents.