I have been running the hot cam kit for a long time now, I'd like to step up to something larger, does anyone know off the top what the largest streetable cam would be that i could swap in? I had been thinking of going with a CC306 or GM847, but I really want something tahts going to give me a noticable differance. Also, I dont want to have to pull the heads to have the spring seats machined or anything, just a power upgrade w/ a cam swap.

 

Well, you are going to have to have new springs for either cam, but thunderracing sells a spring that should be okay without machine work, in my opinion I would go with the GM847 or I have seen alot of people make good power with the 230/236CC. You can also checkout combination motorsports they sell alot of different cams and could give you some good advice on which one would be best for you.

 

I had the spring seats machined around my stock heads. Im running comp 987's with stock untouched heads.

 

The GM847 or the CC306 would be a nice power increase and still be reliable but I think you are missing something with your exsisting setup to only run 8.40's in the 1/8th mi. My car a couple years back with the Hotcam kit, stock heads, stock 3.23 gears, midlength headers and a 2800 Vig ran 7.90's 1/8th, 12.40's@108mph with a mailorder PCM tune. So either your spinning or maybe those are old ET's but the car could definately be quicker with more mods and your same cam. My car also ran 12.20's@110mph with the Hotcam with some other mods and stock heads. I am not trying to brag or put your car down just letting you know 11's are doable with the Hotcam and stock heads, Ken from this board did it awhile back with some 3.42's in his Z28, so your money maybe better spent elsewhere. The car has to be setup complete and good parts will help alot. Later Clint

 

yes, that run was on street tires. track elevation is around 1500 feet above sea level so no one runs terribly fast times at this track. since then i have invested in a pair of Mickey Thompson E/T Drags.

Also, my valve springs are upgraded already and are good to .550 lift.

 

You still aren't gonna have much of a cam selection with springs only good to .550. You had better plan on a spring swap.

 

I say email Bret Bauer and tell him what you want. But if you have LT4 springs youll probably have to upgrade. Beware GM847 and such are going to need to rev real high to make power.

-Dustin-

 

If you are putting down 340hp/355tq to the rear wheels already, it doesn't matter how much bigger your new cam is, you aren't going to get much improvement. You will just get a car that is less friendly to drive.

If you want to see a jump in power, you need your heads done. You are pretty close to being limited in HP by your stock heads right now, so any larger cam won't help until you get your heads ported to get you a lot more power.

Dan

 

I agree. 340 is a very respectable number to be putting down with the hotcam. Your heads are going to need done up in order to get much more power out of a bigger cam. While they are off u can have the new springs put on and get your cam slid in. Then u should see a huge differance

 

I think your car is a freak!!!

My best with my setup is 13.3 with all the mods in my sig... but i havent been able to launch the car any higher than 2000 rpm since i got the cam. The stall is practically pointless since i cant even launch higher than 2000. The car keeps creeping up if i go any higher than that. Guess i need either better brakes or just check them out and see if there are any problems with them.

Back to the subject at hand... 340 is very very respectable, i agree that you will need head work before you see any bigger gains. Plus new springs as well.

 

myself and a couple of my friends have been talkin about it for a few days, i think im gonna go with a stall converter and suspension parts and worry about planting 100% of what power i already have. thanks for all your suggestions guys.

 

Sounds like a good plan.

Dan

 

340 is a really strong number with a hotcam and untouched heads...youll def. see a nice gain with done up heads

 

Something doesn't sound right.

With 320rwhp, 2800 stall, 3.23's, and a hotcam my old old setup did 7.90's at 87mph. We are at 400 feet or so.

SOunds like your on the right track with a torque convertor. Need to put that power to the ground.

 

I also agree with the 340 being a very good number for the hotcam. Get
that power to the ground. The torque converter will help but I did not see
what gears you are running. Hopefully 3:42s or more. Post up some results
when you have them.