Thread: comp magnum

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What does every 1 think about comp's magnum line of cams. I've heard good about them, just wandering what some of you had 2 say. Maybe some have had experience with them. Thanks

My son ran one once. I believe it had equal lift and duration on both lobes. It performerd really well. Then he went more agressive, and he has been going slower ever since.

I like them. I had a Magnum 270 in a 350, and I presently have a Magnum 280 in my 383. You can run a little more compression with the Magnum cam than you can with the XE cams, and you don't get the clicking noise of the valves snapping shut that you get with the XE cams. Personally, I think they are easier on the valve train. On the Desktop Dyno, my engine with the XE274 made a little more hp from 3000 through 5000 rpm but the Magnum 280 cam surpassed it at 5500 rpm. You can't go wrong with the Magnum line of cams in my opinion.

Originally posted by <BLUECAMARO>
What does every 1 think about comp's magnum line of cams. I've heard good about them, just wandering what some of you had 2 say. Maybe some have had experience with them. Thanks

Very few small block chevy heads can handle a symmetrical cam like this.I would look more towards the asymmetrical cam grinds.

Erik is correct about the symmetrical aspect. But if you run an aluminum head with the new chamber design (AFR, Canfield, etc.) you do not need an assymetrical cam.

Originally posted by rumrumm
Erik is correct about the symmetrical aspect. But if you run an aluminum head with the new chamber design (AFR, Canfield, etc.) you do not need an assymetrical cam.

When I made this statement I was refering to the % the exhaust side flows to the intake side.

ok Thanks

Originally posted by erik erikson
Very few small block chevy heads can handle a symmetrical cam like this.I would look more towards the asymmetrical cam grinds.

I absolutely agree.

Originally posted by rumrumm
I like them. I had a Magnum 270 in a 350, and I presently have a Magnum 280 in my 383. You can run a little more compression with the Magnum cam than you can with the XE cams, and you don't get the clicking noise of the valves snapping shut that you get with the XE cams. Personally, I think they are easier on the valve train. On the Desktop Dyno, my engine with the XE274 made a little more hp from 3000 through 5000 rpm but the Magnum 280 cam surpassed it at 5500 rpm. You can't go wrong with the Magnum line of cams in my opinion.

I agree with all of that !
I always used magnums and then I tried some of the new Extreme cams. I have gone back to the magnums.
Also..... most of the time I run aftermarket heads although one time I used some heads from a zz3 crate engine with a 280 magnum cam.

Originally posted by rumrumm
I like them. I had a Magnum 270 in a 350, and I presently have a Magnum 280 in my 383. You can run a little more compression with the Magnum cam than you can with the XE cams, and you don't get the clicking noise of the valves snapping shut that you get with the XE cams. Personally, I think they are easier on the valve train. On the Desktop Dyno, my engine with the XE274 made a little more hp from 3000 through 5000 rpm but the Magnum 280 cam surpassed it at 5500 rpm. You can't go wrong with the Magnum line of cams in my opinion.

I would not put to much faith in the Desktop Dyno.Mine has been off by 10% or more many times.By running a symmetrical cam in an application such as yours you may loose 15-20 h.p.