Next build will be using something better than the stock 317s... may as well go ***** out then, right?

-Used on a 4xx cubic inch, 9.5 compression, probably turbo
-Having PatG spec me another cam
-RCSB truck, non-dd

The ones I am looking at are about the same price, just curious what you guys think.

If other, please specify.

 

GEN III or IV?

 

Ported 317s?

 

vote in the poll

No preference for cathedral or rect. port at this point...

 

wcch ! ftw !

 

thick deck, aftermarket castings

 

Voted, now I am going to start a poll on how many polls Atomic will start.






haha, just messin with ya man.

 

From what ive read, the 3/8" deck of the heads above is enough for 20psi on average....at that point I am near/past the limit of pump gas with some meth, so its a whole new can of worms to push past that where 1/2" deck heads would be mandatory.... but is there a brand you prefer?

 

what block ? 6 bolt is key imo

with that said , 1/2 studs in place of the stocks also helps alot as lsx motors are known for head gasket issues at higher boost ( i blew one on my 370 from pushing it to hard)

also keep the most CC in the head you can this keeps the deck on the head as well.

i run tea tfs 235 cc 6 bolt heads with all the goodies. they are good to .650 lift( running 619 max) and i also opted to run the 1/2 bbc arp studs for insurance . then you could go even more crazy and o ring the bitch.

if your keeping the stock block and plan on making 1000+ i would 1/2 stud it and o ring it .

now that i didnt answer your question at all. cubic inch is key . if i were doing it again id go with the 245cc head

if i were going with a different style intake port id probably go with something from mast or wcch . trickflows are great but there is better now for the bigger cube guys .

when boosted though a perfect cylinder head isnt needed( 317 can work ) but you will benefit from a aftermarket head quite a bit , not as much as an all out n/a car but a good amount.

block and cubes please???

 

See I dont know specifics yet...my block has been at LME for a couple weeks now and they were suppose to have it torn down at the end of last week. I didnt get a call so I called earlier this week and was told the end of this week, so maybe tomorrow or Friday I will know something.

What I really need to know is if the block is still usable without boring the cylinders anymore. They were already at 4.040" and I wouldnt feel that comfortable running any bigger with boost since the cylinder walls are getting thin...if it turns out that cylinder can be fixed with just a hone then I will have the piston replaced and it will still be a 410. If, however, the block needs to be bored, I am very tempted to go with an LSX block and go crazy with those huge *** head studs and 6 bolt heads....but like I said, I should know more by the end of the week.