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SVTPerformance's Chain of Restaurants
The Blower Bistro
need help with stroker, turbo combo
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<blockquote data-quote="IUP99snake" data-source="post: 9704146" data-attributes="member: 7060"><p>I think that's a good idea. With the amount of boost you plan on running, and with a turbo, a lower compression won't hurt. Good point about the centri blower, Ironhand.</p><p></p><p>However, a 9.19:1 isn't pushing it too much. I certainly wouldn't go further than 9.5:1 though.</p><p></p><p>Since the compression is a constant, the one thing you can't change about the motor, (no matter what RPM range you're at, it's low compression) I think it's better to go with a little higher compression. You can compensate with all the other variables, including timing, fuel map, fuel type, meth, boost level, etc. </p><p></p><p>A higher compression engine, N/A or boosted is always going to be more efficient. In this case, you'd theoretically have as much as 2% more power with the higher compression option, with all else held constant. Even if you have a higher risk of detonation, that can be managed at the RPM levels most at risk using meth injection especially.</p><p></p><p>Don't be afraid of the compression!</p><p></p><p>I have 10.5:1 compression!! Granted, I have a centri car and I only make 10-12 PSI of boost. The higher compression makes the engine more efficient and I have better throttle response at low RPM before the boost builds up. It's MUCH better for around town driving. </p><p></p><p>Homer</p></blockquote><p></p>
[QUOTE="IUP99snake, post: 9704146, member: 7060"] I think that's a good idea. With the amount of boost you plan on running, and with a turbo, a lower compression won't hurt. Good point about the centri blower, Ironhand. However, a 9.19:1 isn't pushing it too much. I certainly wouldn't go further than 9.5:1 though. Since the compression is a constant, the one thing you can't change about the motor, (no matter what RPM range you're at, it's low compression) I think it's better to go with a little higher compression. You can compensate with all the other variables, including timing, fuel map, fuel type, meth, boost level, etc. A higher compression engine, N/A or boosted is always going to be more efficient. In this case, you'd theoretically have as much as 2% more power with the higher compression option, with all else held constant. Even if you have a higher risk of detonation, that can be managed at the RPM levels most at risk using meth injection especially. Don't be afraid of the compression! I have 10.5:1 compression!! Granted, I have a centri car and I only make 10-12 PSI of boost. The higher compression makes the engine more efficient and I have better throttle response at low RPM before the boost builds up. It's MUCH better for around town driving. Homer [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
need help with stroker, turbo combo
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