SideStep

I am getting ready to order my heads. I am going with the Patriot Performance Stage II LQ9s. They are offered in 2.02 intake valve and 2.055 ( no difference in price )

What are the ups and downs of either???

http://www.patriot-performance.com/w...05235&DID=1225

(this is for a forged 383/MP122 build)

abbaskhan

i would think the larger valve size would be better assuming your picking the right compnets

LSInnovations

iTrader: (7)

Im running a 2.10 TEA Stg 3 AFR 247cc's....I think its the hot ticket.

ss1

iTrader: (32)

FWIW, I don't think a 2.10" valve will work with a 3.905" bore.

Mine have 2.055"/1.60" valves. I can't really say which will be better with FI.

SideStep

for more opinions....

ls1290

iTrader: (20)

Sure they will. I had 2.10" intake and 1.6" exhaust valves in my 5.3L heads on my 383 which had a 3.905" bore.

Keith

Pro Stock John

iTrader: (34)

This time around I running bigger valves in my AllPro heads.

ss1

iTrader: (32)

I stand corrected. I wonder why we rarely see any companies offer a 243 head with larger than 2.055" valves? It seems when a head is available with 2.08" or larger valves, they're usually marketed for a 4.00" or 4.125" bore. Just a thought.

Mr.MartyStone

iTrader: (12)

I would imagine it is because a large majority of people run N/A due to the cheaper costs. Valve shrouding would definitely become a concern and large valved heads are typically harder to cam correctly due to cylinder fill. A little different when your pressurizing the chamber past ambient.

Marty