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I'm an idiot, serious cam help needed!

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Old May 31, 2003 | 02:55 PM
  #1  
Duke's Avatar
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Angry I'm an idiot, serious cam help needed!

Ok, this is a tough one (for me anyway).

I have a 377 sbc (3.75" stroke, 4" bore), Edelbrock Victor Jr. heads, JE flat top pistons, Eagle 5.7" rods, Eagle 3.75" stroke 4340 forged crank.

It currently has a Comp Cams Magnum cam in it right now (grind number 286HR, 230/230 duration at .050", .560/.560 lift, 110 seperation) and I'm going to be replacing it with an Extreme Energy cam (grind number XR300HR, 248/254 duration at .050", .562/.580 lift, 110 seperation). Both cams are hydralic roller. I think I already know, but what would be the proper procedure for roplacing the magnum cam with the Extreme Energy cam?

Also, I have Comp Cam's Pro Magnum roller rockers, what's the proper procedure for setting these? I'm pretty sure I already know, but I like to double check everyhting before I screw up a several thousand dollar engine....
Old May 31, 2003 | 04:13 PM
  #2  
OldSStroker's Avatar
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Joined: Oct 2002
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From: Upstate NY
Re: I'm an idiot, serious cam help needed!

Originally posted by Duke
Ok, this is a tough one (for me anyway).

I have a 377 sbc (3.75" stroke, 4" bore), Edelbrock Victor Jr. heads, JE flat top pistons, Eagle 5.7" rods, Eagle 3.75" stroke 4340 forged crank.

It currently has a Comp Cams Magnum cam in it right now (grind number 286HR, 230/230 duration at .050", .560/.560 lift, 110 seperation) and I'm going to be replacing it with an Extreme Energy cam (grind number XR300HR, 248/254 duration at .050", .562/.580 lift, 110 seperation). Both cams are hydralic roller. I think I already know, but what would be the proper procedure for roplacing the magnum cam with the Extreme Energy cam?

IMO, the proper procedure is to NOT change to the XR300HR. You are "down-grading" to a less aggressive lobe with lots more overlap. Even Comp says 3500+ stall converter with the XR vs. 2500+ for the HR. You are losing lots of low end with not much gain in the high end. Why would you want to do that?

You might read all of this current thread before you change:

http://web.camaross.com/forums/showt...hreadid=126165

My $.02
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