20002wdchevy

iTrader: (3)

I just won a set of 706's off ebay for $25 and I'm going to rebuild them for when i put my cam in. I was wondering what ya'll thoughts were as far as what valves/springs to run? I'm going with the low lift 212/218 its like .525 and .530 I was thinking the yellow zo6 springs and new stainless valves and new GM retainers. When all is said and done I plan to mill .010 from them. Anyone have any hints or tips for me as far as which hardware to run?

thanks again

Clint

chris04

iTrader: (6)

i think you got the right idea on springs etc, but if i were you since you got the heads off i would atleast mill more than .010 thousandths off to be able to tell a difference

20002wdchevy

iTrader: (3)

Well I was wondering how much i should mill. I mean its going to be a very mild street motor So i didnt want the compression above 10 to 1. Is .020 too much for 7.400 pushrods? Sorry if these are dumb questions I just want to do it right the first time.

joshua022

iTrader: (12)

Why do you want to keep the compression low?? are you planning on forced induction??

sickREDsierra

iTrader: (17)

+1
even if you got up to 11.0:1 you could get away with 93 octane all day, i used to do it everyday with the old truck.

when you do heads/cam, you are gonna have to tune to optimize them anyway, may as well bump up compression for all the power you can get....and i think .030" mill would still be fine as far as cleareance issues go...

as far as the 7.400" rods....a pushrod length checker is a fairly inexpensive tool, and helps a lot in determining the optimal lenth.

20002wdchevy

iTrader: (3)

Well i figured that at 10 to 1 and up I HAD to run 93. Where i'm from all we have is 91 and only sometimes due to being in the middle of nowhere. And on the pushrod length i wasent sure how much the lifters compensated for length. I would like to make more power just not at the expense of ruining my motor thats all. Thanks again

20002wdchevy

iTrader: (3)

Well now that I've got the heads in my hands I'd like to get the ball rolling. Is there an online calculator where I can find out my compression with different amounts of milling? ANd my other question is how much is too much for the LS6 yellow springs (.570 max lift)? I am leaning towards the highlift version of the 212/218 wich is 558/561 but didnt know if you needed more of a saftey margin. thanks again

Clint

20002wdchevy

iTrader: (3)

bump. have money just need to find somewhere to throw it.

Richard@WCCH

iTrader: (3)

The yellow springs will just get the job done. I'm running them in my wife's truck with a 208º .556" lift cam and they're working just fine. Very quiet valve train.
I can help you calculate your compression ratio but we're going to have to do it on the phone. Our number is (818)705-5454. Leave a call back number if you get the answering machine.

Cheers,

Richard