Boosted One

iTrader: (6)

Is anyone making 700whp with stock 317 heads? That is my Hp goal and I'm at a toss up on whether I should get a set of ported Patriot or PRC 317s or just use the stock ones I have and upgrade the springs. In other words could the stock heads achieve those power levels? Would the stock valves be OK?

Thanks,
Frank

sciff5

iTrader: (1)

You could deff make 700whp with unported heads.

Syclone354

iTrader: (6)

Id like to hear some of this too. I just got my truck running and my 317 heads are basically stock. They have larger stainless intake valves and upgraded springs/retainers but are otherwise pretty much stock. I have a T76 q trim ball bearing turbo pushing through them.

black98ws6ta

iTrader: (77)

I've made 920 rwhp on a mustang dyno with stock heads and valve's, with dual springs being the only modification.

dudeman

iTrader: (43)

what short block? what cam and turbo?

CalSpeedPerformance

iTrader: (64)

read his sig and it answers 2 of 3 of your questions.

black98ws6ta

iTrader: (77)

I was trying to find the thread but couldn't. PTE T4 88mm turbo, 408 cu in 6.0l iron block, camshaft was low to mid 240's at .630 lift and a 115 lsa.

extremetoy

iTrader: (17)

how much boost are you making?

SilverSS

iTrader: (30)

Fwiw, my old set-up I made 700rwhp with stock 241 heads and a stock 01' cam at 15-16 psi and a D1SC. 317 heads flow a lot better so it will do it easy, especially with a turbo.

Boosted One

iTrader: (6)

Thanks guys! this is great to hear. Now I can spend some extra on turbo goodies!

jason99frc

iTrader: (12)

On my old procharged FRC i did it with the following:

346, Stock crank, callies rods Diamond pistons, stock 99 vette heads w/ spring upgrade ~ 9.4:1, 226/230 595/595 114 comp cam, LS6 intake and stock TB, 1-3/4 headers & D1SC
@ 11PSI = ~640RWHP
@12psi = 670
@13.5 = 706
No meth on 93

Jimmy P

iTrader: (177)

If you are on a budget you can deffinantly use untouched 317 heads(with spring upgrades) to reach those power goals.

OUTLAWZ RACING

iTrader: (9)

Yes untouch 317 heads with springs will work just fine. I run the patriot stg3with the larger valves and stuff they work great I got a dam good deal on them.

dadkins

iTrader: (1)

825 RWH at 5400 @19 psi S374 Bulls Eye Turbo
Stock Six Speed
Stock Rear
Stock 98K LQ9 317's with dual PRC Springs and LS6 cam.
also made 749RWH with the stock 34K LS2


I just broke the main shaft in the trans after 1 1/2 years and about 4k street miles of abuse at around 950 flywheel hp

cracker

iTrader: (1)

Stay away from the patriots. You'll have much better luck with ported 317's by someone who is reputable. Reputable is key especially on a boosted car.

Dont have someone take the swirl bowls out and get someone with good experience.

-Wade

OUTLAWZ RACING

iTrader: (9)

Ummmm.... Wow I had these heads for over 3 years and no issue. hmmmm...

rx_treme

iTrader: (9)

yeah theyve been great for me too..