cam for nitrous
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Drifting
Joined: Mar 2003
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From: sussex nj
cam for nitrous
i am going to put in a cam building a new motor on a stand just getting it ready for when this one gos what im looking for is a cam that gos with nitrous i heard the lt4 hotcam is one of the best for lt1s but i heard its not so good with the nitrous is a zz4 or stock lt4 better with nitrous or is the hotcam the best any info someone running it with 100 shot or 150 shot
Le Mans Master
Joined: Oct 1999
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From: Sachse Texas
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Re: cam for nitrous (fiberglasscoffin)
Depends...CID, Heads + flow, and intended purpose of engine (Drags, Street Driving, Road Racing, etc), LT1 or L98, if L98 what intake?
However a good cam for Nitrous is a good cam for a blower. Basic generalities I would suggest are more on the exhaust side than on the intake side duration, and higher LSA than if you were running NA.
One cam that is good for Nitrous and is good for a 350 or mild stroker is the CC305 cam ground on a 114 lsa. It is a 220/230, .540/.540 (1.6 rr) on a 114. Made good power NA in my 396 (392/418 rwhp/tq) and felt good on the squeeze.
However a good cam for Nitrous is a good cam for a blower. Basic generalities I would suggest are more on the exhaust side than on the intake side duration, and higher LSA than if you were running NA.
One cam that is good for Nitrous and is good for a 350 or mild stroker is the CC305 cam ground on a 114 lsa. It is a 220/230, .540/.540 (1.6 rr) on a 114. Made good power NA in my 396 (392/418 rwhp/tq) and felt good on the squeeze.
Racer
Joined: Oct 2000
Posts: 456
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Re: cam for nitrous (black bart)
Funny you mentioned that. I called CC just yesterday to see what kind of cam that they recommend for my LT1 stroker/nitrous application. The best(actually the ONLY) cam they offered was the CC306. That is a very nice cam, by all means, however I was hoping for a few more options. More Performance offers a nice selection of LT1 nitrous cams. I talked with them today and Mike helped me with what I need. Check'em out.
Comp-Cams makes a Nitrous cam for SBC give them a call.
Le Mans Master
Joined: Oct 1999
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From: Sachse Texas
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Re: cam for nitrous (Dr. Doom)
They have thousands of cams that will work with the LT1 and nitrous. It is at a custom grind level though and not a prepackaged cam. I would disagree that the 306 cam is a good one for nitrous though. IMO it has too much difference in the durations and not enough LSA. But then again, that is JMO.
Drifting
Joined: Feb 2002
Posts: 1,952
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From: Little Rock Arkansas
Re: cam for nitrous (Vette92)
On nitrous mills (and other forced induction motors for that matter) you want to keep overlap at a minimum to prevent intake reversion. Lobe separation angles of 112 or more (I run 114) are the best for keeping these in check. Generally you will want to see considerably more duration and lift on the exhaust side in order to evacuate the increased gasses produced by the nitrous. Generally a cam designed specifically for N2O use will not be as powerful in n/a operation, however, many companies (like Crane and Comp) now have some lobe designs that not only work very well but don't compromise n/a operation as much either. On my 396" small block I ran a custom ground Crane hyd. roller initially I designed to work well in both modes... It was 242/248 duration at .050" with .595"/.595" lift on a 112 lsa. However it had a little too much overlap for optimum N2O use and I switched to another custom grind; it was a mech. roller with 248/254 duration at .050" with .620"/.650" lift on a 114 lsa... This grind made over 570 hp n/a and bumped a 250 shot of N2O to over 320... This was the grind in the car when we went 9's. I'm currently working on a new solid roller for the 436 I'm building; it too will have at least a 114 lsa.
-Jeb
-Jeb
