95RA -STi V3 head swop, what difference?
17 December 2009, 08:10 PM
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95RA -STi V3 head swop, what difference?
Hi, i'm having my 95 RA's engine rebuilt, and am changing the heads for STi V3 heads. I understand they are better, with hotter cams. Will i notice any difference with these?
Thanks,Mit
Thanks,Mit
17 December 2009, 08:43 PM
#2
Largely depends on your wilder cam's duration and lift.
The solid lifter STi 3 heads will allow the engine to breathe so much better the the hydraulic v.1/2 ones. The early WRX heads apparently suffer breathing issues and can surge at around the 380+ bhp point.
The STi 3 heads apparently can handle at least 480-odd bhp. Remember to get some MLS HGs in there too, such as the STi 3/4 ones (1.6mm thick - to keep the same CR).
The solid lifter STi 3 heads will allow the engine to breathe so much better the the hydraulic v.1/2 ones. The early WRX heads apparently suffer breathing issues and can surge at around the 380+ bhp point.
The STi 3 heads apparently can handle at least 480-odd bhp. Remember to get some MLS HGs in there too, such as the STi 3/4 ones (1.6mm thick - to keep the same CR).
Last edited by joz8968; 17 December 2009 at 08:45 PM.
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