roller cam choice
#1703618
11/26/14 06:08 PM
11/26/14 06:08 PM
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Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
Old School
OP
super stock
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OP
super stock
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
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on one of my 500" motors, I spun the cam bearings and bent the cam. i'm rebuilding the motor now. my cam spec is: comp roller 272/276 @.050 .649" with 1.6 rockers. 108 centerline. I run this same cam in 3 other motors. all street cars.
question is, I have a spare cam that specs:cmi roller 276/283 @.050 .737"/.672" with 1.6 rockers. 107/115 centerline. to use this cam instead of buying a new one, would be nice. would this cam be to aggressive for a street car?
motor specs: 500"
sr 295
13.1
indy dualplane
1000 ho AED CARB
with the old cam, the motor made 700 hp. not really looking for more power, just would like to use this old cam....
68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
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Re: roller cam choice
[Re: Old School]
#1703619
11/26/14 07:21 PM
11/26/14 07:21 PM
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Joined: Mar 2006
Posts: 9,835
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,835
MI, usa
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If you liked the old one, I'd run it. Sounds like a pretty wild street motor anyway. Intake duration isn't much larger. LCA is 111, pretty wide at that duration. What was the LCA of the old cam?
Doug
Last edited by dvw; 11/26/14 07:24 PM.
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Re: roller cam choice
[Re: 572charger]
#1703622
11/27/14 10:26 AM
11/27/14 10:26 AM
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Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
jyrki
master
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master
Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
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Sounds like na old cam motion grind, I blieve Indy sells them now. A healthy lift! I have used that cam in a couple of build ups in a 3.75 and 4.15 stroke street engines. With the longer stroke it was very versatile, making even ecent low end tq. And I had less CR than you, a pump gas engine.
Plynouth VIP '67 TT IC EFI
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Re: roller cam choice
[Re: Old School]
#1703624
11/28/14 12:13 PM
11/28/14 12:13 PM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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Quote:
question is, I have a spare cam that specs:cmi roller 276/283 @.050 .737"/.672" with 1.6 rockers. 107/115 centerline. to use this cam instead of buying a new one, would be nice. would this cam be to aggressive for a street car?
motor specs: 500"
sr 295
13.1
indy dualplane
1000 ho AED CARB
with the old cam, the motor made 700 hp. not really looking for more power, just would like to use this old cam....
From what you posted, that cam will be fine. You have enough CR to run it. The only thing, the cam will be harder on the valve train (springs, etc.). Also, check to make sure your intake spring setup can accommadate that much lift with the 1.6 rockers.
When you say 107/115 centerline, do you mean you install it with the intake lobe center at 107 ATC and the exhaust lobe center at 115 BTC? ie. 111 lobe separation angle (LSA)
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I would call them to get a return authorization number and send it in to see if it is fixable 
