porting engine using 99 twins

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Oct 9, 2006 | 01:30 PM

AWD-RWD racer

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From: pennsylvania

porting engine using 99 twins

what kind of a gain could one expect from doing a street port on a motor using 99 twins at about 10-12 psi. quicker spool up? hp increase? i know this has probably been gone over, so im sorry.

Oct 9, 2006 | 04:11 PM

tt7hvn

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slappin on the 99 twins alone will give you a 20hp boost so just factor in a decent amount for the streetport

Oct 9, 2006 | 04:15 PM

rynberg

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From: San Lorenzo, California

NOT. The 99 twins don't make any more power than the stock twins.

Assuming ideal conditions with twins, you would probably gain 10 rwhp with a streetport, maybe 15 rwhp.