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SVTPerformance's Chain of Restaurants
The Blower Bistro
Ideal Compression for Centri
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<blockquote data-quote="IUP99snake" data-source="post: 11718131" data-attributes="member: 7060"><p>I have 10.3:1 with a P1SC running about 11-12 lbs of boost with a 3.7" pulley and a power pipe. Granted, I don't have forged internals so Im limited with how much "peak" HP I can make, around 450 to be safe, but the higher compression makes a huge difference in the lower rpm's off boost, not to mention throttle response and fuel economy. </p><p></p><p>I'd say you can go 1 or 2 points higher in compression with a centri than a roots or twin screw because the centri only makes boost at the higher rpm range. </p><p></p><p>Detonation is a lot easier to manage with other techniques than compression ratios, which are fixed for the life of the engine. I'd say, go with a higher compression ratio and have it tuned right. You can also benefit from E-85 or meth injection to keep detonation at bay. </p><p></p><p>If I were to build a new forged motor running more boost, I'd probably go somewhere around 9.5:1.</p></blockquote><p></p>
[QUOTE="IUP99snake, post: 11718131, member: 7060"] I have 10.3:1 with a P1SC running about 11-12 lbs of boost with a 3.7" pulley and a power pipe. Granted, I don't have forged internals so Im limited with how much "peak" HP I can make, around 450 to be safe, but the higher compression makes a huge difference in the lower rpm's off boost, not to mention throttle response and fuel economy. I'd say you can go 1 or 2 points higher in compression with a centri than a roots or twin screw because the centri only makes boost at the higher rpm range. Detonation is a lot easier to manage with other techniques than compression ratios, which are fixed for the life of the engine. I'd say, go with a higher compression ratio and have it tuned right. You can also benefit from E-85 or meth injection to keep detonation at bay. If I were to build a new forged motor running more boost, I'd probably go somewhere around 9.5:1. [/QUOTE]
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Ideal Compression for Centri
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