retro1977

iTrader: (3)

Have a 04 lq4 that will go in my s10. Iam planing on a single plane w/carb. Are the 243 worth me getting? this will be a street / strip truck. rest of combo is th350 w/4000 conv. 9inch w/4:11 gears truck should be around 2800 lbs. also dont want to run into and ptv issues. have seen plenty of this combo's run good. would like to run in the 10's if I can. any combo's out there with stock 317's or 243 or ?

5_02ls1

iTrader: (20)

you will gain some compression and thats about it...the flow numbers are close...

retro1977

iTrader: (3)

Yeah I cant see spending 500 or so unless the gain was worth it. anyone else

Monroe98SS

iTrader: (3)

I would use the #243s myself and put more SCR in the motor. With your camshaft profile(whatever that might be?), I would rather you have more compression in it.

retro1977

iTrader: (3)

could I mill the 317 alittle?

Daryn

iTrader: (19)

yes just make sure you check your new pushrod length and your ptv

retro1977

iTrader: (3)

how much would you mill off them?

XtraCajunSS

iTrader: (2)

Compression is your friend.

You will have to mill the snot out of those 317's to get where you need to be. It just depends on what your goals are. You could mill the 243's a little to bump the compression even more. Go here: http://www.csgnetwork.com/compcalc.html play around with some numbers and see where you end up. FWIW, you will lose ~1 cc of chamber for every .006" milled on stock heads.

I would shoot for a minimum of 11:1 for any decent cam.

Shane

retro1977

iTrader: (3)

I heard you can get 243 new from about 450 from patriot is that the best price? and this will only be a weekend /track truck. as long as I csn run 93 or so I will be happy

dre2013

iTrader: (7)

the 317s are good heads if you mill them enough..what cam are you going to run?

1969mach1

I dont know, if they do they don't post it on the site

Here is the best price I have found on 243 heads.
http://www.sdpc2000.com/product/1257...dAssembly.aspx