SPRAYED 01

iTrader: (22)

So long story short I blew my forged 348 up a few months ago. I'm building another ls1 now. I need to put some money in the heads due to them being slightly damaged. Nothing major.

should I switch it up? My 241s are ported but I didn't get any flow numbers when I bought them. I was thinking of buying the texas speed ported 243 heads.

Would I really see much of a power gain on a boosted set up? I made 675whp with the 241s and then ran out of turbo.

Snyper

iTrader: (27)

Go with 317s. They flow the same as 243s but have bigger combustion chambers...and are cheaper.

SPRAYED 01

iTrader: (22)

My other option would be put a couple hundred into my current 241s and save alittle cash. I guess my question would be are 317 or 243 heads that much better than ported 241s? Will I really see an increase in power?

XtremeDime

iTrader: (16)

Its a matter of lowered compression more than anything, the 317s drop you about a half point. With FI you dont need to have awesome flowing heads to make gobs of power either

SPRAYED 01

iTrader: (22)

I still have pistons to buy so I can lower the compression that way.

Grr

iTrader: (2)

i wouldnt even consider lowering compression if its 10:1 or less. No reason to go lower than that with todays technology. I vote to keep the 241s myself, you wont be head limited anyway

Snyper

iTrader: (27)

I ran 317s and a stock block up to 15# with an 88mm turbo.

BlkBird2000

iTrader: (10)

Where can you find 317s? Like what do they come off of?

Junk86

6 liter truck motors.

Grr

iTrader: (2)

I also ran 317s on my 6.0L up to 18lbs, completely stock motor with a cam. I dont suggest EVER going below 9.5:1 compression though, high compression turbo motors are the best of both worlds

Snyper

iTrader: (27)

Why not? Ill be running 8.9:1 next year on a DD car.