Thread: 327 Build Cam Selection

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I did some cam checks on this engine . Now it's going to be for street Performance . So you will want a Camshaft that will give you good H.P but max Torque .

The XE268H showed to be that cam 359.2 H.P 398.7 Torque

The XE274H shows 364.7 H.P 392.8 Torque

Now that L-79 Intake is ok and a well set up 600 Holley would work ok . But when I plugged in a Better Dual Plane intake and a 700 cfm carb the H.P up-ed 25 Horses and the Torque 13 Lbs on either Build . I would go with the XE268H with a Better intake and carb = 386.3 H.P 411.0 Flbs Torque .

I am worried about dynamic compression being too high with the XE268. Could end up as high as 8.2 with the iron heads??? Thoughts??

I am trying to keep this build period correct as the car is done as an L79 clone. That is why I am going with the Holley 600, winters aluminum 490 dual plane, correct valve covers without holes, dual snorkel air cleaner, oil tube with the correct PCV valve. I picked the small journal 327 with the road draft opening at the back of the block to do this.

I don't plan on changing to an RPM intake but for 25HP??? I wouldn't have though a change in carb and intake would help that much below 6000RPM. I was told the 600 is plenty big enough below 6000???

I like the Magnum cam line, and I ran a 270 Magnum in a 327 some years ago and really liked it. The one thing you have to check is the DCR. A Magnum cam will allow you a little more static compression than an XE cam because the intake valve closes later. To give you an example, when I was choosing a cam for my 383, I was looking at the XE-274, but with 10.6:1 static compression, it pushed the DCR to 8.64. But with the 280 Magnum, the DCR was 8.44 which is acceptable for aluminum heads and 91 octane. Because you want to stay under 8.0 DCR with iron heads. Your best bet is the XE-274 or the Magnum 280 or something comparable from Crane, Crower, or Lunati. Because you have a 4-speed, you can go bigger on the cam and still have decent street manners. I don't think either of these cams would be good with an automatic transmission.

Originally Posted by rumrumm

I like the Magnum cam line, and I ran a 270 Magnum in a 327 some years ago and really liked it. The one thing you have to check is the DCR. A Magnum cam will allow you a little more static compression than an XE cam because the intake valve closes later. To give you an example, when I was choosing a cam for my 383, I was looking at the XE-274, but with 10.6:1 static compression, it pushed the DCR to 8.64. But with the 280 Magnum, the DCR was 8.44 which is acceptable for aluminum heads and 91 octane. Because you want to stay under 8.0 DCR with iron heads. Your best bet is the XE-274 or the Magnum 280 or something comparable from Crane, Crower, or Lunati. Because you have a 4-speed, you can go bigger on the cam and still have decent street manners. I don't think either of these cams would be good with an automatic transmission.

well...I decided on the 280H... its 230/230 @.050" .480" lift, 110 LSA. It should get me 7.85 -7.9 DCR. Hopeing that will be safe with the iron heads. Might be a little softer on the bottom end but should sound great. I had the old L79 cam in there before with less static compression, poor squish, and it bleeds off a lot more compression than the 280H. I thought it ran well so this should be a good cam. Thanks for the help boys...