foggedz

iTrader: (1)

With a standard 350ci SBC bore and a 1.600 exhaust valve, what is the largest intake valve that can be run?

1989GTA

Rule of thumb is 51-52% of the bore size. That would be in the 2.05 to 2.08 range.

foggedz

iTrader: (1)

IC, well the heads I was looking at had 2.08 intake valves. Do you know if there are any issures with that large of a valve not clearing a stock size bore? Or is it just that the flow of the heads will be hurt from not having as much area around the valve?

Ryan02SS

iTrader: (3)

The larger the bore the more the valve will be unshrouded and flow will be better. 2.08" is about the largest you want on a stock 4.000" bore.

ZONES89RS

iTrader: (25)

When you step up to a 4.125 bore then you can look into the 2.10 valves, big nasty, better have a bump stick to makem work.