228r and torquer v2 rpm range
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+4 is 4 degrees advanced, +1 would be only 1 degree advanced or 3 degrees retarded from +4. Retarding cam timing results in all valve events happening later.... advancing the cam results in valve events sooner. the most influential valve event is intake closing, by retarding cam timing the intake closes later and since duration does not change cylinder pressure will bleed off as the piston comes upward with intake valvestill open, result is less cylinderpressure = less torque at low rpm.
Justin
Justin
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With running the same LSA and ICL the TRQ v.2 will have roughly 150-200rpm higher power band
A 112lsa+2 = 112lsa with a 110icl
A 112lsa+2 = 112lsa with a 110icl
Last edited by 99Bluz28; Jul 21, 2012 at 09:29 PM.
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From: BFE
+4 is 4 degrees advanced, +1 would be only 1 degree advanced or 3 degrees retarded from +4. Retarding cam timing results in all valve events happening later.... advancing the cam results in valve events sooner. the most influential valve event is intake closing, by retarding cam timing the intake closes later and since duration does not change cylinder pressure will bleed off as the piston comes upward with intake valvestill open, result is less cylinderpressure = less torque at low rpm.
Justin
Justin
Theoretically yes, but does it really happen that way?
