ajensen383

I am building a 402 with F1 Procharger and looking to make around 750+ RWHP.. I have been searcing these forums for days trying to find a definitive answer, but I still cant come to a conclusion. Would a set of PRC/TEA or WCCH 317's , or L92's be adequate and reliable for 16-18PSI, and 750+ HP??? This isnt going to be a drag only car, more of a street/strip, so everytime I take it out, it wont be at high boost...I was thinking L92, but it seems the deck thickness is a huge issue. Are the 317s alot thicker than the L92 to support the boost without lifting?? Or just bite the bullet and get aftermarket??

Shawn @ VA Speed

iTrader: (3)

as far as i'm concerned you can't beat the as cast trickflow's on a budget FI engine. They flow good air,almost as good as a cnc ported head and have thick decks. These will give you the least amount of issues of any heads

FMX05

iTrader: (3)

Shawn what springs and rockers would you recommend for those heads?

LS1RedZ

iTrader: (19)

I was just about to say if you have the coin go with some TFS 235 heads. Cant beat'em really for an off the shelf head.

westtexasbuff

iTrader: (40)

A TBSS here in town has L92s on a 403 running 24lbs of boost. You don't aftermarket casting heads for your goals...

Shawn @ VA Speed

iTrader: (3)

24 lbs hmm, that should be around 1300 hp or so.

I don't see it lasting too long

ajensen383

Thanks, what size do you recommend?? Only problem I have with Trick flows, is on the SBC and SBF heads have terrible guide problems...My brother in law has a set of Track Heat Ford heads and the valve guides are shot after 3 years..Not sure if the LS stuff is any better...

ajensen383

Wow that seems like alot of PSI on a stock L92..

Shawn @ VA Speed

iTrader: (3)

the as cast heads come in 220cc intake runners. The trick flow ls guides are fine as long as you run a roller rocker such as the yella terra's.

Oh yeah, next time you talk to Andy J. tell him i said hi-haven't talked to him for a while.

ajensen383

Thanks Shawn...I was talking to Andy last night about my build, and he mentioned that he saw Brodix had a LS rectangular port at the PRI show, and he thought it was available, but I dont see anything on their website.. Do you know anything about it??

I will tell him next week when I go down to work on the Pro-Mod... He picked up a Pro- Street 41 ******, a little while back and we built a tunnel rammed 632 for it... It looks sweet as hell...He made it a pump gas motor at 11:1 and still put down 950+ hp and 800+ ft lbs...Thats his car to take to the local cruises...and run 8's....lol...hes crazy