I'm sure this subject is as old as the hills but I will ask it again to get a tailored answer. As in the sig, I have a 175 shot with a Comp 224/230 cam. I think that's the biggest XE grind. Probably should have went bigger with my cubes. It's streetable though and I thought I would just upgrade my nitrous for track use so I can get more power. Is the 112 LSA sufficient for a 250 shot? Is the duration split wide enough? I read a thread a while back that said (in the LS1s that is) that a single intank pump with stock fuel lines and rails is only good for about 600-650rwhp. I figured a 250 shot would stick me in that range. So I seem to be ok there. Injectors are big enough I believe. Someone also mentioned that the back cylinders might go lean with the forward fed intake. I've got forged SRP shelf pistons, not ceramic coated or anything. Anyone have any comments on these pistons and a big 250 shot? I figured I would use NOS octane boost in addition to my timing retard of 8 degrees. My big question is am I in the position to go 250 without swapping cams or should I stick with the 175?

 

224/230 is a baby cam

Biggest XE grind is 227/233 duration, .560"/.569", 114
Biggest X series grind is (TN-236XH) 236/244 duration, .608"/.613", 112lsa

SRP pistons are extremely strong. Budget, but not because they're not strong pistons. They're rather heavy (less intricate machinework) which keeps costs down, and strength up


Consider taking a look at this intake. Your getting to that point. Complete with new fuel rails to feed all the nitrous you'd want. 300+cc. BIG.
http://home.wideopenwest.com/~squinn0039/ltx.html

 

On that big of a shot, it's not the cam you should worry about, it's your tune... can't say much more than that though, I'm not very knowledgable when it comes to nitrous.

Honestly, as far as the cam, I would swap in a 224/236 xe (at least). what compression are you at with the srps?

 

cool intake who has tried this.

 

That's a nice intake. However, I'm short of $$ so I'm stuck with the ported stocker. I screwed up on the cam but want to avoid the PITA (pain in the ***) associated with changing it. I could probably get a tune done without much problem. I'm sitting on a 10.8:1 CR right now but I have a timing retard on the Digital 6. Where do I find listings for all these LT1 cams? I can't find anything on Comp's website. The biggest they have listed is the one I have and the 306. I want to be able to look at all the LSA, lift, and duration in a list so I can compare.

 

The intake is made by one of the fastest N/A lt1 drivers in the country. His last name is squinn, and he posts on CZ28 in advanced tech regularly.


Here's a granddaddy cam list

http://www.cmotorsports.com/engine/l...ft-design.html

 

That is a bad *** list of cams. Should I shoot for more duration or more lift? Obviously I will need to go for a wider split duration, but which is more of an issue? Thanks.

 

my 233/239 .569/.577 runs close to stock on a good tune. With a 396 I'd look at least that sbig. maybe bigger.

 

I shot an e-mail over to Combination to see what they think. I like the looks of this one: TS-239XR 239/248 duration, .577"/.600", 115lsa. Comments? BTW, appreciate the advice. Thought the wide LSA would be great for nitrous. I just don't know if the duration is too much.

 

Better yet, I just got off the phone with Crane and they said the dual valvesprings I have are good for .700" lift so what about this cam?
TS-224XH 224/236 duration, .605"/.622", 114lsa

Smaller duration, more lift.