dnkynrbk

iTrader: (34)

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,

RAGENZ28

iTrader: (5)

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.

car_fixer

I agree, some thing doesnt seem right about it, of course mine is all wrong for nitrous but it hauls lol

RAGENZ28

iTrader: (5)

Yeah but you spray like 400 hp to see a 250 hp gain

dnkynrbk

iTrader: (34)

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

dnkynrbk

iTrader: (34)

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.

RAGENZ28

iTrader: (5)

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.

dnkynrbk

iTrader: (34)

So does lift really matter on how much power your getting say a 613 lilft vs a 630 lift cam. And was told to have a least a 10 degree spilt.

RAGENZ28

iTrader: (5)

Sure lift helps but if you can have a cam that works with less than .650 lift your valve springs are going to be happier than running something over .700 or .750

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 Are you going to rev it more? What are your current springs good to lift wise and what's the spring pressure? You also have to consider your gear and tire size, you go from 6500 - 7200 thats a big difference in gear requirement, you'd have to change the gear or make a lot more power, you can always add more nitrous lol.

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.

dnkynrbk

iTrader: (34)

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,

RAGENZ28

iTrader: (5)

Close to what I thought 242/254, they must be genius' over there

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

car_fixer

actually its more like a 300 hp gain from a 225 shot.....it will have more in it next trip to the track though!

that cam sounds better, clearance should be ok on a wide lobe sep like that

dnkynrbk

iTrader: (34)

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

car_fixer

with the gas they have these days (junk lol) 11 is pushing it, unless you consider e85 pump gas, then 13 to 1 is no problem lol

RAGENZ28

iTrader: (5)

Personally I wouldn't go over 11-1 with pump gas with an aluminum head.

dnkynrbk

iTrader: (34)

hey on that cam do you think I would have a piston valve clearance.

RAGENZ28

iTrader: (5)

Doesn't matter what I think, anything that big should be checked for piston to valve clearance. My opinion won't do you much good when your piston is beating the crap out of your valves

RAGENZ28

iTrader: (5)

I've seen people make over 200 hp from an 80 hp jet so in your face.

car_fixer

so, sounds better than the wind blowing through your uh...car?

RAGENZ28

iTrader: (5)

It'll sound better when a **** loud of boost is blowing into my engine