aode08

GT-40P 59cc 1.84 54 118 58 183 185 169 n/a flow
GT-40P 1.46 46 93 115 123 126 118 n/a flow
Lift .100 .200 .300 .400 .500 .550


as you can see, stock GT-40P heads are nothing past .500

Joel5.0

They are ported GT40's.....not untouched GT40p's.......

aode08

yeah and thats a good thing[8D]

I took that into consideration and he can go bigger for more power in the top

, but his computer and bottom end will have annoying issues, unless tuned.

ant0045

im def. gunna get the car tuned. i do things right rather then have problems.http://sbftech.com/index.php/topic,2493.0.html. check that out.everyone who doubts. if gt40s stop makin power at .500 lift how is this possible. also the springs in the heads now can accept up to .575

aode08

id say if you have the correct springs, pistons get notched, a tune; then go for it.

Just be prepared to sacrifice your bottom end, for more at the top with 302 Cubic Inches of Displacement.

That link is dead

ant0045

def. gunna be doin everything the right way once.