Camming

[blowmestrokeme]

how much lift is safe for stock 906 heads.

[Paul Precht]

902 heads are fine but like the 452s many of them have cracks in the ex seats. Stock 906 heads with the red springs are ok with up to a .500 lift like the 509 purp. The intake ports typically stall badly around .530 lift. The 346 heads are all around the best choice for porting as they don't crack as often as the 452s

[ehostler]

I've split this into a new thread. There was no need to revive a thread that died over 10 years ago, to ask your question.

MOD