Spec'd out custom grind Cam. Need Feedback
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I called a well known custom cam shop today. This is for the 370 that I am building with a turbo 400-tbrake, patriot stage three heads 64cc, stock 1.7 rockers, -2cc pistons, 300 shot, etc in a 99 camaro. Here is what the specs are that were given to me. 228/232 with 113 lobe 612 lift 360 lobe lift. Would like to have some feedback, I was hoping to maybe go with something that was a little more radical but wasnt sure if anything bigger than this would be to much for my setup. Thanks,
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With a 300 shot I think you should have a lot more duration split on the exhaust. 113 lobe is fine, but if you ran something like that I would think it would be closer to at least a 10* split.
Something like 232/244 .612/.612 on a 113 would seem more like a nitrous cam, my nitrous cam was 270/284 .660.660 on a 114.
I'd look around that cam doesn't seem right at all.
Something like 232/244 .612/.612 on a 113 would seem more like a nitrous cam, my nitrous cam was 270/284 .660.660 on a 114.
I'd look around that cam doesn't seem right at all.
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Yea thats what I said. I told the person are serious on this I said a radical cam. I allready have this same cam almost in the car I have now the ms3 237 242 610 lift. They said yea thats right. I told them on the specs drag strip car only went through the whole specs. and gave what heads and the whole 10 yards. Do you guys think I would gain more by going to a 61cc head and getting my compression 11.5 vs 11.1 thanks for any imput
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they also told me with the cubes I had to work with thats it. What rpm range should I be looking for in a nitrous cam. What do you guys think I could spin the motor too. My current set up I only spin it to 6500.00 but have turned it 6800.00 when tunning it but wanted to stay on the safe side.
Last edited by dnkynrbk; 06-11-2008 at 08:51 AM.
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If you're spraying the car I would put most of the effort into the piston and cam setup. More compression is more power, but you could probably spend money other places.
If you want it in the 6500 range get a cam around the specs of the MS3 with more exhaust duration like 234/247 .615/.615 on a 112-114, that's just my opinion.
Just saw you have forged pistons and rods, with good valve springs I would think 7,200 or so should be no problem. If you want more power up top you could spec something closer to an MS4 or t-rex cam with a nitrous profile but in those duration ranges.
If you want it in the 6500 range get a cam around the specs of the MS3 with more exhaust duration like 234/247 .615/.615 on a 112-114, that's just my opinion.
Just saw you have forged pistons and rods, with good valve springs I would think 7,200 or so should be no problem. If you want more power up top you could spec something closer to an MS4 or t-rex cam with a nitrous profile but in those duration ranges.
Last edited by RAGENZ28; 06-10-2008 at 11:54 PM.
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I personally would run the smallest, mildest cam to meet your needs. If 242/254 .630/.630 is what the cam guys says will work to run what you want on the bottle fine, but running 242/254 .748/.714 I would think would be overkill.
Kind of like running an F3 blower on a motor you plan to make 8 psi on and run on pump gas
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Other thing is you don't want to go too big on the cam because you don't have much compression. If you want to get a little more rpm and make more power and have it work with nitrous I would think something around 240's intake and 250's exhaust on the duration with a lobe between 112-114.
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Today I called the cam place back and they misunderstood what the purpose of my car was being used for. I let them know that it was going to be a strip only car so they changed the specs a little. Here is what they are recommending now: 240/252 with lobe lift 370 on intake and 360 exhaust with a 630 lift and 113 lobe. Let me know what ya thank and also about the piston to valve clearance. Thanks,
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Today I called the cam place back and they misunderstood what the purpose of my car was being used for. I let them know that it was going to be a strip only car so they changed the specs a little. Here is what they are recommending now: 240/252 with lobe lift 370 on intake and 360 exhaust with a 630 lift and 113 lobe. Let me know what ya thank and also about the piston to valve clearance. Thanks,
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PTV clearance should always be checked but that cam isn't too crazy, and with after market pistons they had valve reliefs correct? I'd think that cam would be pretty on the money with your rpm range and purpose. I'd have to give that one a
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hey thanks RAGENZ28 and other guys on here. Yea using diamond flat with -2cc valve relief pistons. I was thinking of running compression in the 11.5 or 12.1 compression on pump gas. That just means I need my heads 60cc at least