If for example your heads hit peak flow at .650, putting a cam in with .650 would only be open at peak lift once for a micro second when the valve reaches .650. Putting a cam in with say .670, you would hit the head flow peak once when it opens past .650 (on the way opening to .670) and then it would hit .650 for a second time as it closes down again down from .670. This all assumes that your heads arent hitting peak flow outside of a streetable lift range, which is doubtful. What are your head flow numbers?347 said:ok here come the questions................With a cam of lets say [email protected],what gear would i cruise around in at 60k's? 3rd or 4th?
The same as you are now
What do you recon the idle speed would be? (now is about 800rpm)
Around 1,000 with a vacuum tank for your brakes as you wont have enough idle vaccum.
At what rpms would the power roughly start?
A flat tappet cam has a 3,000rpm powerband, a roller has 3,500. Work backwards from the maximum revs you are willing to spin it to. The more revs, the more power, and you have the engine combination to support it.
Could you please explain this to me......."You want to hit peak lift twice in the curve, not just once".