JD_Z28

iTrader: (19)

My new 402 twin turbo setup is almost done. I'm going to be running 317 heads and I was wondering if I should upgrade only the exhaust valves? What size exhaust valves is ideal for a big hp twin turbo 402? Should I just run the stock intake valves or upgrade those too? Sorry for all the questions guys but I'm trying to get this project done soon and don't want to half *** anything.

OUTLAWZ RACING

iTrader: (9)

the standard size valve would work, ill up grade to stainless or a valve that stands high temps. I dont think u can put a bigger valve with out machine work.

JD_Z28

iTrader: (19)

I have a machine shop doing all the work so do you think it would help for me to run the 1.60 exhaust valves?

OUTLAWZ RACING

iTrader: (9)

I ran them no problems on my patriot stg 3. but i had dished pistons tho.

dschmittie1

iTrader: (64)

I am turbo and not procharged and when I did installed my 243 heads over the winter I had a 1.60 exhaust valve put in and the seats cut back into the head. Then I hand ported the exhaust runners. I left the stock sodium filled intake valves in mine. I have heard that the exhaust side of the head is the most important FI engine.

JD_Z28

iTrader: (19)

I might be doing the same thing with my 317 heads. I'm just not sure if I should have the intake valves done too?

JD_Z28

iTrader: (19)

Bump.