Cams?

[95SleeperAcheiva]

OK so I been looking at alot of things lately.
Ben, I know performance is more than lope, but ya got to have the lope bro!
How does that 1280 Cam of yours sound? Can I put that into a 3.5? I'm planning on buying the 3.5 from a 2006 G6.
I keep seeing this crane cam 272 in the forum, any part #? cause the crane site seems oblivious to the existance of 60 degree motors. Lastly, how far can we shavea 3500 head to gain compression? I can't affrod pistons and a rebalance plus at that point I'd want to work the crank and can't afford that right now either.

And is it superdave? where did you get a .539"/.549" 289/293 cam for the 3500!? part #? ANd if that getrag came with the car, what year is it? I need counsel shifter and cables. thx

[prophiseer]

just my two cents, to the best of my knowledge the 3400 heads and 3500 heads are in the same boat as far as decking goes. I think the absolute max you can deck them is (correct me if I'm wrong) ~.025"-.030" . . . GM's spec is no more than .020" though. Either way, decking the heads those amounts won't really bump compression all that much.

[sil]

if you shave your head that much your definatly going to need to shave the intake side of the head and the lower intake manifold cuase the angles will be off

[prophiseer]

Good to point that out man, slipped my mind. Defi, although at <=.020" GM doesn't call for it as a necessity. Better to be on the safe side with these motors, as those LIM gaskets haven't been the sturdiest in the past. None of the machine shops I know are cheap when it comes to milling manifolds, though; cheapest I know of here is about $120 for one time on the machine (which means that you have to be damn close to ballpark when you tell them how much you want off).

[IsaacHayes]

272 cam is for the 3.1mpfi blocks. Only cam regrinds are availble for 3x00 motors. Get a sealed power replacement cam and have that ground since it's solid not hollow.

[PCGUY112887]

Thread hijack... how is a cam installed in a 3x00 anyways? Can a novice do it?

[BillS]

Very few after market cams, if any, are available for the cars with SFI - no bump on them to trigger the cam sensor.

The Crane 272 is now called a 253941 see http://tinyurl.com/2amxga

I used one in my current project and it has excellent characteristics with the stock 9:1 compression - really starts pulling above 3000 rpm.

[Superdave]

make sure that 3500 is the LX9 and not the VVT version.


my cam is a regrind on a stock solid core that i bought from Ben and it's more extreme than i'd run in anything but a weekend car. my car came stock with a Muncie HM282 however i swapped the V6 bellhousing onto a tranny from a '93 Quad 4 HO to get the better gearing.


with the 3500 it's possible to run the thinner 3.4 RWD headgaskets, i have a set from ROL that are .045 compressed. Bumped my compression up a good amount. Shaving the head to gain compression is never a good idea

[PCGUY112887]

Spuderdave would you have to heave your heads modified for high lift from using a thinner head gasket alone? I know if you get a hot enough cam it's required, but wasn't sure if the HG was thin enough to make modification needed.

[Superdave]

Spuderdave would you have to heave your heads modified for high lift from using a thinner head gasket alone? I know if you get a hot enough cam it's required, but wasn't sure if the HG was thin enough to make modification needed.

Nope.. the headgasket dosen't effect that enough to worry about.


w/o the springs these heads are good for like .760 lift, with the springs i used (best i could find that would work) i can go .615 lift before coil bind which makes safe lift .555 range. If you machined out the spring pockets and got more installed height then you could go more lift...