Quote:
Originally Posted by xXSicSicSicXx
^ explain why
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because at this power level a 1 7/8 primary is not at all a restriction, you would want to increase the pipe diameter until the primaries are not a restriction, yet stay as small as possible to keep exhaust gas velocity as high as possible and as a result make the most average power.
The ballpark to when you should move to 2" is about 800rwhp