montec355

iTrader: (5)

I have a 98 camaro that i am looking to mod, but with mostly factory parts. I was thinking about running a stock set of 243 heads along with ls6 intake and streetsweeper cam. I was wondering what is the factory combustion chamber size on the 243 heads as well as how much the piston is in/out of the hole on a factory 5.7? I am also curious what is a good dcr to run in these engines? also if you were to mill the 243's what would be the max so that you wont run into piston to valve clearance issues?

I am curious also what others with similar setups are putting down for hp and torque?

Thanks in advance for you input as i am new to the LS game.

Josh

camz28arro

iTrader: (12)

The factory combustion chamber is 64.5cc and the ls1 piston is usually around .007 out the hole. Milling the 243's over 35 thousandths starts to affect flow but I don't know when PTV becomes an issue. I'm pretty sure the PTV is the same on the 241 and 243 heads, they just have a smaller chamber and same valve placement. Specs are 228/232 .612/.600 111 for people that could answer the ptv question.

I would expect about 410-430rwhp with that setup.

SWEET98SS

iTrader: (8)

I have the streetsweeper on stock heads, numbers in my sig. Any other question about cam, I can answer for ya?

montec355

iTrader: (5)

I really just want to make sure the combo will work with the 243 heads without interference problems! on the other hand i would really like it to make between 420 and 450 hp, but with a decent power band. i am not sure if there are better cams out on the market today.

SWEET98SS

iTrader: (8)

I would get a custom specs for ya, talk wit Patrick G on this forum. The streetsweeper is rather large, pain in the butt to go slow in.

SOMbitch

iTrader: (8)

Good max DCR for pump gas is around 8.7

Look up Ed Curtis and ask him how much you can mill. He designed the cam...

montec355

iTrader: (5)

I will look into everything that was suggested. thanks for your help everyone!

Josh