IMM Engines 408 build

mullinax95 said

The Comp Cam is their XFI series cam which is aimed at fuel injected engines.
What I find strange is the intake lift is higher than the exhaust. Usually it's the other way around. Wonder what is achieved by doing that? The duration is higher on the exhaust however.

.577 intake .572 Exhaust
[email protected] .230 Intake 236 Exhaust

Click to expand...

The missing lift on the exhaust isn’t a big thing and the extra duration is what really helps it to breath and operate better. Valve lift isn’t really (or hugely) important, not in a major way unless your REALLY looking to “Get Some” or more than your share. LOL!

On my street strip heavy breathers, or a track car.....
I like to take advantage of the heads ability. If the head flows good until, let’s say, .600, then I’d like to get my cam lifting up there if possible.

You can get a real decent running machine and not brake .500 lift. Great performance, powerful engine output or a fast car doesn’t need to have a high lifting cam. You just need to know how to take advantage of what is available and maximize it .