QCK57

Hi all been reading up on heads for my combo.
I would like those with some experiences with FI heads to suit these cube's to come in with their knowledge and experience....

I have 346 TT set up 750rwhp, purely drag car.
Currently run high 9's @ 136mph.

Now i have ported 241's and looking at some more suitable heads, which may help with some HP/mph.

I am budget oreintated as any one knows geting a car to the track cost$$$

Some my first thoughts where some-
317's, however not sure if i am heading down the wrong track?
PRC.....
keep the ported 241?

Just look for some 2nd hand AFR TEA etc.....

PN i had some dart pro's and found them very good not sure on others thoughts?

redtan

iTrader: (5)

Definitely look for an aftermarket head with a thicker deck. You want those puppies planted when pushing enough boost to run 9s.

PREDATOR-Z

6 bolt heads are available at decent prices. Check with TSP

mark21742

What chamber cc are you running now, and what compression ratio do you have, what cr are you looking for in the end and what fuel are you running? Your car might be a good canidate for AI's standard ported 243 heads.....the only problem with the 317 heads is the larger chamber, but that could help depending on what rpm your boost really comes in at...compression and octane make less of s difference up over 4,000-4,500 rpms because the motor is actually spinning faster than the time it takes for detonation to occur and do damage... So if you are running race gas and or boost coming in late/higher in the rpms you could run and see good gains with higher compression.....this is my goal in the end here down the road with my 408.....I'm running 12.5:1 scr and plan on either 1 big turbo, or two and not building a lot of boost till past the 4,500rpm mark

QCK57

Thanks guys...

E85
10:1, current 68cc 241's, Boost 16psi, 3700rpm just off converter/transbrake!

Block is LS1 so not sure if 6 bolts can be used on this block?....

I have read good things about 317 CNC'd with boosted LS's ?

But do i look for larger runner and thicker deck for my combo EG AFR 225/72cc

As will be looking to use heads with next 390cui short block in the future.

????