turbo_Z

i am stuck in a cam loop! just when i find one i like...i find one possibly better.

so anyway i was looking thru some selections and noticed the 306 has a 12 degree duration split. i then checked out the 224/236 which also has a 12 degree duration split as the 306 but it is described as a blower cam. now im wondering why the 306 would not be a blower can when the 224/236 is?? after all this recent XE vs CC306 battle on stock heads...i have been trying to find a cam that matches my heads a little better(stock). if the CC306 can get a guy a 115 mph trap speed then a 224/236 should do better(with stock heads).

Camaro37

I'm no expert on this blower cam stuff, I doubt I will ever even have a blower, but here's my 2 cents anyway, take it for what is worth. The 306 has more duration causing more valve overlap, the exhaust valve is open when the intake valve is open allowing some of the intake charge to escape. It just the longer duration on the 306, of course you could get it on a 114 or higher LSA to account for the duration. That blower cam your talking about is prolly on a 114 too, right?

Camaro37

As for the power comparison, the 306 w/ 230 intake duration allows more air to be taken in than the 224/236. So the 306 would most likely make the most power. The high exhaust duration on both cams help the LT1 alot cause of crappy exhaust ports, however the 306 allows more air/fuel in and more out. More lift allows more air in too, thats where the XE grinds make their power. My OPINION is that the 306 would make the most power of the two. I'm prolly gonna get flamed cause I'm not hip because I'm not a huge fan of the XE grinds, I do like them though, so go easy on me people.

rskrause

It is not a good blower cam. Too much overlap. That's not to say if you install a blower on a car with a CC306 you won't go fast, just that there are cams out there more optimized for forced induction.

Rich Krause

Gripenfelter

The cc306 will bleed alot of the boost off.

Not a good cam.

turbo_Z

if the 306 isnt a blower cam then how can they call that XE a blower cam?? they both have the same duration split..even the lift isnt that much different between the 2.

RamAir95TA

The wider the LSA, the more chance you have of blowing that expensive boost directly out the exhaust valve.

turbo_Z

alright then...the same LSA...the XE224/236 would be comparable to the cc306. i was concerned running that wide of a duration split so my choice was probably the XE224/230. but after noticing the cc306 has as much of a split and is a badass cam...i figured this XE would be good match for stock heads.

rskrause

Overlap is a function of LSA and duration. The CC306 is 230/244 @ 0.050" with a 112LSA. The overlap is 74.5 degrees. I am not sure what the exact specs you are using for the XE 224/236 are, but if it's ground as it usually is with a 114LSA the overlap is 54 degrees, which is a substantial difference.

With a 112LSA the 224/236 would have 58 degrees of overlap, still a lot less.

Rich Krause