i have a nnbs rcsb with a 4.8l its mainly just for show... im now wanting to do a cam swap and never really knew much about cams. not looking to take the truck out racing every weekend just something to give it some sound...

http://www.youtube.com/watch?v=NeQ0jk-7Uzc

found this video on youtube with basicly the same truck i have, running the compcams thumpr cam. the specs on the cam are 219/233 554'537' 109LSA

how will this cam be against a tbstall,and 4.10's

 

Way too big... It will sound good, but it will probably hurt you more than help.

 

hey lol thats my truck,i no longer have that cam,it ran better than stock and sounded nice.i dont have a stall,but was planning on going with a 3200 with that cam.

the tb stall is not worth it bro.

 

lol damn small world man.. i guess i will need a bigger stall than that. what eles did you do when you did the cam swap .

 

i ran the stock pushrods and just upgraded to the yellow z06 valve springs.and yea the ls7 cam sprocket.

 

I'll be running the ***** Thumpr (227/241) in my carbed LQ4 going in a 73 impala with a 3000 stall and 3.73's in the rear

And will be running stock 317 castings milled .040 to give approx 64cc chambers

 

227/241 that is a large split like that you would see with L92 heads. I wonder why the split is so big. Usually you see a split of 6-8 degrees, not 14

 

I will be going to the L92 heads later, just not at the moment. I haven't ordered the cam just yet because I was looking at GM #88958722, 227/239 .551/.551 on 108lsa. It's only 375 from Scoggin Dickey and the Thumpr is closer to 400 for essentially the same thing. Still has 17 degrees of overlap, the GM is lackin 2 degrees of exhaust duration, and the lift is equal on the intake/exhaust where the thumpr is greater on the intake side.

That GM Cam is actually the "stage 2 hotcam" for the LS7's. They have a stage 3, but...it's not worth it from what I've read. it's a 233/276 (yes, that's at .050) .595/.595 on 107lsa.

Here's a sound clip of the stage 2 cam...

http://www.youtube.com/watch?v=n_S0LlORVIA

and here's one of the stage 3...

http://www.youtube.com/watch?v=dejek_Um-gI

 

you need the extra duration on the exhaust side for the l92 heads because of the awesome intake. a lot of cam companies have started making specific cams for the l92 just like that.

 

I was also looking to go with the thumpr cam on my 6.0l but like that stage 3 cam