Ye no kidding dodgeman,

Youll probably loose power with all those mods on a mild motor...

All you need to do to a A15 head is a nice port and some dual springs to make 150hp, doing massive work to the flow when your not aiming for big numbers generaly just reduces bottom end and mid range torque

Sounds like serious overkill for a street hack.

There are plenty of A15 powered race cars that make more than enough grunt to frighten the crap out of most people, that don't run valve sizes anywhere near that big.

its in my work ute.
daily driven

just having a play
running 40 mm dellortos and custom exhaust

Thats quite serious work your doing there, what power are you after? 150hp+?

so what are the best specs to do to an a14/15 head?? as im looking into doing my head and you guys seem pretty switched on

35mm exhaust is a major mod (offset guides) EX will hit side of bores,will need to go big bore also (79mm +). cheers

u mean this thread?

http://datsun1200.com/modules/newbb/v ... e=&topic_id=46032&forum=9

Tomo,

Did you get my PM about the exhaust flanges? Getting a small batch made up if you are interested, please reply asap. chris

rebuilding oval port head to put on my
a15
going up in valve size 40mm inlet 35mm exhaust,
bigger inserts,hi porting,bigger springs
maybe angle mill the head to get plug closer
to the center, angle mill inlet manifold
to correct manifold angle and to staighten inlet tract
looking for any ideas,sugestions
thanks tommo

did someone have pics of cutup heads??