6-Speed Terror

iTrader: (4)

i want to know if its possible to put valves that are too big. Im looking at the 2.08 and 1.60 like on the stage 3. local mechanic said they were to big for what i plan. going to be running stock cube, cam in sig, with 150 to 175 shot with all boltons. would stage 3 heads be good or should i go with 5.3 heads and get 2.02 and 1.57

SSpdDmon

iTrader: (10)

Yes, you can over valve an engine. Vote for 2.02 and 1.57.

6-Speed Terror

iTrader: (4)

do you think the 5.3 heads would be good or stick with the oem ls1's ported

ArcticZ28

iTrader: (14)

What about ported LS6's or 241's? I think that would be your best bet.

6-Speed Terror

iTrader: (4)

is there any diff between 241's and the 853 that i have

Beast96Z

iTrader: (21)

Yes, there is a such thing as to big. The bigger valve along with a small bore shrouds the valve and dosen't allow it to dispurse air effectivly. You can run some larger valves if they have the correct valve job, but I would max out at 2.05 on a stock bore.

6-Speed Terror

iTrader: (4)

what would be better 2.05 valve on the ls6 head or on the 5.3 head, i like the idea of higher compression but afraid the valve might hit the piston

Gunnar@Patriot

iTrader: (20)

We would suggest a 2.02"/1.57" or a 2.05" at the max. We do not suggest a 2.08" on a stock bore.

6-Speed Terror

iTrader: (4)

hey Gunnar what about the heads ls6 or 5.3 thanks for the info

Beast96Z

iTrader: (21)

The LS6 head will be the better head, however the 5.3 head will give you more compression without milling.

Gunnar@Patriot

iTrader: (20)

The LS6 head will flow more, but as Beast said, a 5.3 head will give you more compression without milling.

6-Speed Terror

iTrader: (4)

awsome thanks

ArcticZ28

iTrader: (14)

Now you have to figure out which is worth more to you, higher compression and less flow or higher flow and less compression.