Exhaust limits/Carb choice

Thanks guys,

This is his first car, and as far as driving experience he has only what he accumulated during Drivers Ed. He does have experience with dirt bikes, quads, waverunners, etc, so reaction and response should be OK when given a spirited ride.

The car will be his daily, nothing more. Back and forth to school, work, movies, etc. No "official" strip time is anticipated.

The Stealth is a spread bore manifold, I just went out and checked. I have always used Holleys on my toy's and have no experience tuning the ThermoQuad. My guess is it would be slightly better on mileage and may have a softer power delivery than the DP Holley, but this is just a guess. The ThermQuad was on the original 318 when we got the car.

The headers could be pounded out and patched, maybe even a "skid plate" welded across the bottom of the lower tubes to protect them against close encounters with speed bumps. They only offer around 2" of ground clearance and fixing them looks like a perpetual problem. I just don't know at what horsepower level their benefit begins to outweigh the drawbacks. We're hoping to see 300hp or so at the crank from this package. These headers were a royal PITA to get off.

The cam is a split pattern with around 10 degrees more exhaust duration than intake. I'm not sure that will overcome the restrictions in the manifold, at least as far as the 300hp target.

Thanks again.

Cheers, Mark