Guys what is the opinion and what are you guys running for a nitrous cam for a LT1 with stock ported heads, ported intake, headers, 58 t-body, 150-200 shot, M-6.

Want something between a nos cam and a good power maker? What LSA for these cams?

Thanks

 

Do not need an all out "nitrous grind" for a 150 shot. Can just pull some timing from either the tune or adjustable box. I dont see a reason to lose your more often used N/A power for another 5 horses when you spray.

I believe a comparison has been done where most off the shelf "nitrous" cams make little to no difference vs an N/A cam during spraying, while leaving the regular N/A power on the table when all motor.

I would say different if you were talking about a 250 shot, but I just dont think a 150-200 shot of nitrous warrants a cam that will sacrifice N/A power.

 

http://web.camaross.com/forums/showthread.php?t=520713

Rich

 

OK so we will just run a shelf cam, what do some of you run or recc?

We are looking for a 10.99 pass?

 

I would run a cam somewhat more nitrous friendly. Be sure there is at least 10-12 degrees more exhaust duration than intake @ 50 and install it with a couple of extra degrees of advance. Read the sticky.

Rich

 

Does comp grind a cam of that design

 

Comp can grind basically whatever you want.

 

Well I KNOW that can grind what ever I want but do they have a shelf cam with these specs? Im not interested in waiting months for them to grind me one, been down that road!

 

The point is, exactly what do you want the cam to do:

1 - maximize NA performance, run OK on N2O.
2 - maximize N2O performance, take the hit on NA performance.
3 - provide a decent compromise.

That's going to make the difference. My choice was #3, and I let the shop that built my engine spec the cam. Goal was to build about 500 flywheel HP NA, capable of passing NJ rolling emissions, and capable of swallowing a 300-shot for the track. Cam ended up being a mild solid roller, 230/242 114LSA 0.590/0.590. The wider LSA helps emissions, since there's less overlap. But the cam still gives up a bit of peak HP running NA.

 

My cam took maybe 2 1/2-3 weeks from spec to arriving at my doorstep. It shouldnt take months!

Must be a beast both on the track and on the street. Have you ever ran the 300 shot yet on a dyno or the track, or just the 125 in your sig?

 

Yes Ive ordered cam before and took months from Comp, Lunati, Cam Motion! Ive also ran a Jeff Prock fogger on a Camaro with a 500 shot, can you say 8.26 at 161? Ive just recently sold a outlaw mustang that went 7.3os at close to 200. So I do know a little more than the AVERAGE KID.

Just trying to help a friend with this LT1 and have decided to call some experienced peeps!!!!!!!


Thanks for the info

Steve

 

Most of the bigger guys I know tune/make there N/A HP and then put on the hose. They pull the appropriate timing and let it rip.

 

The wide LSA also moves the EVO earlier. This cam is certainly a good example of a compromise. If it were optimzed for N2O the exhaust duration would be larger still. That would increase OL and might also help NA performance, but would hurt emissions. Running a quick sim of a typical SBC 383 shows a few hp gain at the expense of torque if the exhaust duration is increased to 250 degrees. Ditto with N2O.

The "nitrous cam" really only comes into it's own when HUGE ampunts of N are used. However, a cam with a narrow LSA and little I/E split will lose a fair amount of hp compared to the type of specs seen in this case.

Rich