phoenix1987

iTrader: (3)

How much of a power and torque difference would a 2.04 valve make in a ported 5.3 head? Head will be ported and milled to 59cc. An Ms4 is the cam I am using. This is a BUDGET head build. I really don't want to put to much into these heads as I am going a different route in a year or two.

What do ya guys think, worth it to go with big valves if I am just going to sell them in a year?


I all ready have the stock ls1 valves.

GT Griller

iTrader: (8)

As far as i know the MS4 doesn fit with 5.3 heads unless u fly cut the pistons.

phoenix1987

iTrader: (3)

Already taken care of

5.3LJimmy

iTrader: (10)

If you plan on going a different route with the heads in a year then it's not worth it. The small increase in CFM you might see is not gonna be worth the cost of the valves.

phoenix1987

iTrader: (3)

Thats what I was thinking. I figure just get the stock ls1 valves cut at the shop since its so cheapo and run them.

Whats the main difference 10 cfm at most?

Bandit28

iTrader: (28)

10CFM is a good gain, exscpecialy on the exhaust side.

phoenix1987

iTrader: (3)

The big gain would be on the intake

willyfastz

2" valves will flow a lot more than most think, and with the right valve job will make better power than the 2.02". If you want to buy valves just get a set of Ferrara 2" valves and have a proper valve job done. It's really more about valocity that just flow.