I have ran , RPM , vs stock heads, My friends have run (still does) rpms, and a set of the Pro comp victor jr knock offs, full cnc port job, flow of @ 340s350s @620lift, the rpms flowed 291,
my question is, I have watch him switch heads off the same motor, put 1.6 rockers instead of the 1.5 and saw no pick up??
I have RPM heads now but will be building a 500 cu over winter,,
he has ran a 500 cu with both sets of heads with no improvement,
why would I switch heads if there is no pick up to be had with set of $2200 and bigger rockers at cos of $400??
Is there enough pickup in say the Indys over other such heads???
Knowing that Indy heads would be over 3 grand!! is there enough pick up to justify??
My thinking now is no , unless I want to push the RPM of the motor thru the roof??