Camshaft Question

Okay, let's say you've hit the magic dynamic compression wall of 9:1, and you still have more room in the heads to make more power, but you need to bleed off some pressure to avoid detonation. If keeping VE as high as possible is the priority, which of these variables would you play with in the cam specs: grind in more overlap, or increase exhaust lobe duration? Why?

Longer duration.

Rich

Ya need a later IVC however ya get it.

Yep, and the wall might be lower than 9:1 in most setups as well.

Yep, and the wall might be lower than 9:1 in most setups as well.

Can you elaborate on this please? Why would one engine have a lower DCR tolerance than another? What factors would need to be changed to raise that tolerance?

Cooling, tuning......tight quench maybe.

Higher octane;)

In reguards to cooling. What radiator is most people using with very high HP and 8-9:1 DCR's? This is in 93-97 F bodies with a LT engine type.

Can you elaborate on this please? Why would one engine have a lower DCR tolerance than another? What factors would need to be changed to raise that tolerance?

The better the VE of the motor, atmospheric conditions, chamber shapes there is a lot that goes into it especially to be 100% detonation proof.

Bret

Every time I see your dad's quote I find myself wondering if you are Robert Heinlein Jr. ;)

Every time I see your dad's quote I find myself wondering if you are Robert Heinlein Jr. ;)


LOL!

"Most people can't think, most of the remainder won't think, the small fraction who do think mostly can't do it very well. The extremely tiny fraction who think regularly, accurately, creatively, and without self-delusion- in the long run, these are the only people who count." --- Robert Heinlein

Looks like dad has a new quote for his sig just in time for Christmas.

Bret