Cam change for LS6 researched, help.

[67zo6Camaro]

I did a cam change search on this site and read several post. From this I came up with a suggested cam change for my stock 2001 LS6 motor. Also I got a cam suggestion from Comp Cams tech center. Basically Im looking for any additional comments and/or suggestions related to my pursuit for more HP.

I currently have a 2001 LS6 motor in a 67 Camaro. I run a T56 trans to a 9" with 4.11 gears. I have upgraded the throttle body to an 80mm BBK, I use the Street and Performance shorty headers that go to a 2.5" dual exhaust with a cross-over and only one set of O2 sensors. The ECM is a 98 Camaro style that was programed by S & P.

My last dyno showed only +-375 rear wheel HP which is about +-425ish HP at the flywheel. I would love to max out this motor by using a cam, spring and push rod upgrade only this time around. The car is used for autocross and track days, therefore, the RPM range is 2000 to 6500. I do run a P/S pump and power brake. I know a re-programe of the ECM is a must after the cam install.

Here is what I got as a suggested cam from the prior post: a 224/230 114 LSA at .581 and .592 or a 224/224 upto a 228/228 116 LSA at .571 and .571.

Here is what was suggested by the Comp Cams tech center: with a duration of .050, cam is a 223 intake and 231 eshaust with .610 lift intake and .617 exhaust on a 112 degree lobe separation angle.
Cam #54-457-11
Dual spring kit #26926TS-Kit
Pushrod set #7955-16

Im not sure what power anyone of these combo's will make, but I would like to hear your comments.

Brett

[WS6]

My personal favorite cam for a street LS1/6 is a 228/232 Comp XER. Put it on a 112+4 LSA for a good rumble at idle or put it on a 114+4 for a milder idle. Put the cam in 2* advanced. It's a simple nothing special cam that works. You lose a small amount of low end but the power band comes in hard and quick starting around 2500 rpms and it produces good torque. With your 4.11s you'll get into the power band quickly and it'll pull hard to red line. What you lose low end wise ie below 2500 isn't enough to cause concern and honestly isn't the noticeable. This is not like a 230+ cam that's gutless below 3000rpms and feels like a turbo finally kicking in as you reach the power band. It's much more progressive and what you gain through the rest of the power band will make you giddy like a little school girl the first time you run through the gears. Sounds great at idle too with the 112+4 LSA.

[dhutton]

I went in circles with the same question myself for quite a while before sending $25 to Pat G to spec out a custom cam for me. What he came up with was quite close to what I had in mind but there were some differences. I think it's worth the $25 just to hear what he recommends. In my case I wanted a nice broad torque curve and wasn't too concerned with peak dyno horsepower. The cam he spec'd uses the EPS lobes which I understand to be a little quieter than some of the other lobe profiles.

http://www.guerragroup.com/camshaft_help.htm

[67zo6Camaro]

Thanks Trey and Don. Any HP And TRQ numbers to share?

Trey did you op for the rocker roller upgrade or did you just keep it simple with springs and pushrods?

Don do you remember any cam numbers from the custom or the prior cam you were thinking of?

Brett

[dhutton]

My car is not on the road yet but my recollection is the cam is 222/226 114 +4 with .6 lift. I have AFR 205 heads and also installed the comp cams trunnion upgrade kit for the stock rocker arms. It is quite similar to one of EPS's standard grinds.

[WS6]

No need for expensive roller rockers on an LS engine honestly. I actually had a friend remove his because of some high RPM issues. They were Comp rockers and there was nothing wrong with them. He checked with his contacts in the industry and they reported the same issues. I never bothered with them simply because they weren't needed. I tried to sell my customers what they needed not everything I could simply to make a buck for myself.

I forgot to mention springs earlier. I know a lot of people will run Comp 918s with a cam like I mentioned but I prefer a dual spring. Call it piece of mind I guess. I do like the 918s just not with this strong of a cam. Best place I know to get a dual spring and push rod kit is from Texas Speed. Which reminds me, since they are a sponsor as is Speed Inc, ask both of their opinions. Both are good companies that build solid cars/motors.

For dyno numbers and how well different combos work, check out LS1tech's dyno forum. I find it to be a pretty good resource.