question on a comp cam

fford · Mar 26, 2008

Well I am getting ready to put the bottom end together and was wondering if the cam I have is suited to the combination.
I have forged pistons .030 over, scat rods with 3/8 ARP bolts, trick flow 205 heads 42# injectors 70mm TB and a holley systemax intake.I run a T-5 5 speed. I am bolting on a HP performance stage II turbo kit and the cam I have is a CC XE 276HR-12, the specs are...
@.006 tappet lift
Lift .544 intake and .544 exhaust
duration 276 intake 282 exhaust
lobe separation 112

installed at 108 intake CL....

duration lift at .05 224 intake/230 exhaust
lobe lift .32 intake and .32 exhaust

So is this a decent cam for the combination?

Fast63 · Mar 26, 2008

you have the 205 CNC heads? And this is a 306? I think a bigger cam and some more RPM are what you need to take advantage of the heads. The cam will work with your combo, it just won't be running at it's full potential.

fford · Mar 26, 2008

I know the heads are a little big for the motor. Due to the turbo kit I couldn't do the dart 347 this year, but next year looks good for that, so I decided to get the heads this year planning ahead a little for the new motor.
so the cam should work well with the turbo then?

Bullitt347 · Mar 26, 2008

The LSA of 112* is wrong IMHO. Should have a LSA of 114*. Otherwise you lose boost out the exhaust port due to all of the overlap. On a 331 8.5:1 compression engine I run a cam with .544 lift int, .560 exhaust, duration @.050 is 220* int. 224* exh. 114* LSA. With 15 lbs boost engine puts down 625lb/ft torque and 550 H.P. at the tires on pump gas with only 21* total timing. Idle is not quite smooth. Comp Cam hyd. roller by the way. Never have to spin the engine past 6,100 rpm. Has 500 lb/ft torque at the tires or more from 1800 rpm thru 5900 rpm. Yet you can put put it around if you so choose.

Fast63 · Mar 27, 2008

somehow I missed that you are going to install a turbo.....

But I agree the lobe seperation should not be any less than 114, and as far as I know, forced induction likes a lot of lift and moderate duration. Go with what the previous poster said.

question on a comp cam

fford

Fast63

New Member

fford

Bullitt347

I have been doing it wrong this whole time

Fast63

New Member

Similar threads

question on a comp cam

fford

Fast63

New Member

fford

Bullitt347

I have been doing it wrong this whole time

Fast63

New Member

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