fast300zx Posted November 23, 2006 Share Posted November 23, 2006 Ok here is the deal i wanna get peoples opinions on higher compresion and lower boost or lower compression and higher boost. Ok so I did the math and found at 8.1 to 1 running 28 lbs of boost I would get the same final compression ratio as if I were to run 9 to 1 at 15 lbs of boost. So I will make a poll High or low compression. Quote Link to comment Share on other sites More sharing options...
fast300zx Posted November 23, 2006 Author Share Posted November 23, 2006 opps i meant 25 not 15 sorry. Quote Link to comment Share on other sites More sharing options...
Alex_V Posted November 23, 2006 Share Posted November 23, 2006 if its a drag car run 9:1. If its a road racer 8:1 or 8.5:1, which ever is available. Either way its not a big deal, Just make sure you cool it right. ~Alex Quote Link to comment Share on other sites More sharing options...
fast300zx Posted November 23, 2006 Author Share Posted November 23, 2006 Ok yeah i forgott to mention that. why would you run higher cr and lower boost for a drag car. Could someone explain this? thanks Quote Link to comment Share on other sites More sharing options...
NissanSportMag(Z31) Posted November 24, 2006 Share Posted November 24, 2006 To get off the line better. The lower compression would make you slower off the line. But you can always make it up with the higher boost in the long run. Keep in mind that you'll probably never hit boost over 20psi in 1st or 2nd gear. But that will depend on your actual turbo used. If you're only going for a drag car, why not lower the compression and really raise the boost? You can build boost on the line by retarding the timing and creating a rev limiter. High boost launches are possible, but you'll really need to beef up the half shafts and stub axles. Quote Link to comment Share on other sites More sharing options...
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