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Old 07-31-2003, 11:08 AM
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picking the right cam..

does anyone know how to get cam dimentios from comp cams?
i went on there wed site.. found a cam i want.. its the 280 magnum.. but theres no specs.. like i wana at least no where the cam affects the RPM range.. does anyone no of any other sites or anywhere i can get some more info? thanx

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Old 07-31-2003, 11:28 AM
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If it's a SBC the 280 magnum is:
230 @ .050 for both I&E Duration
.480 lift.

If it's a BBC:
Same duration.
.520 lift.

I got this out of my Summit mag and it doesn't have a lobe sep. figure. Hope it helps.

I ran the 280 in my BBC. It has a nice rumble at idle, it worked well for me on the street, but did have a little high of an rpm range. I'd say go for it, but I like a cam to sound bumpy.
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Old 07-31-2003, 11:29 AM
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I have ran this grind of camshaft and I believe it sports 280 degrees of duration and around 230 degrees @.050 valve lift. This particular grind on a small block chevy has around .480" valve lift and is ground with 110 degrees of lobe separation angle.
This is a good high performance cam in a small block, but should definitely be used with more stall speed in an automatic equipped vehicle. This cam will produce useable power above 2500 RPM up to around a maximum of around 6200 RPM.
This is a nice sounding cam with a good power range.
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Old 07-31-2003, 03:49 PM
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Ditto with NAIRB a good street cam with a Holly 300-36 duel plane high rise intake and a Holly 3310 750 with vacuum secondaries.
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Old 08-01-2003, 12:08 AM
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sorry guys ya its a small block.. ok so its around 2500-6200 eh.. hmm that might be a bit much for my 4x4.. i got a holley 750 with secondaries.. with a edelbrock performer manifold.. and hooker headers... o ya and a gear drive.. thats all thats done... but i like more low end power.. and i have a 4 speed so i want the lumpies cam i can get! but isnt it the lumpier the cam the more of the higher RPM it effects?? thats what it seems like in the ades i bin reading.. but correct me if im wrong.. but i want for sure a lumpy cam.. thought the 280 would be perfect. but like gt2betubbed said does that mean its not lumpy at all?? thanx
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Old 08-01-2003, 08:47 AM
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Quote:
Originally posted by Trav
sorry guys ya its a small block.. ok so its around 2500-6200 eh.. hmm that might be a bit much for my 4x4.. i got a holley 750 with secondaries.. with a edelbrock performer manifold.. and hooker headers... o ya and a gear drive.. thats all thats done... but i like more low end power.. and i have a 4 speed so i want the lumpies cam i can get! but isnt it the lumpier the cam the more of the higher RPM it effects?? thats what it seems like in the ades i bin reading.. but correct me if im wrong.. but i want for sure a lumpy cam.. thought the 280 would be perfect. but like gt2betubbed said does that mean its not lumpy at all?? thanx
the 280 is a good grind, and it does have a little rumble to it...
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Old 08-01-2003, 08:56 AM
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Those specs are pretty much the same as the cam im running in my 383, I am running a weiand xcelorator intake and a holley 4150 vac seondary with a proform 780 cfm main body. This is all in a mud bogger with a rev man valvebody th350 and a tci super streetfighter convertor. I can agree with the higher rpm manners of this cam becuse mine doesnt really come alive until 2500 plus
rpms.

Heres a link to my cam card if ya wanna check it out.

l8r

-j-rOd

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Old 08-01-2003, 09:10 AM
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Hey Trav, what I meant buy my statement was that the cam has a very nice bump to it at idle. Since you're running a 4x4 and worried about low end, just throw in a set of 4.56's (depending on tire height), and you should be able to use the the power pretty well. Trying to get a bumpy cam with low end power is almost impossible, but you could call around and see if someone can do a custom grind for you. I got LAZER CAMS to grind me a cam with 267 dur @ .050 but with a rpm range of 2500-6500 (typically should be around 4000-8000).
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