Thread: Vortec Heads

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im using a set of stock style vortec heads in my s10. im running .534 lift, 1.6 roller rockers, Comp Cams springs (think they are rated for .655 lift). So obviously now im going to need to do some work on them. i need to mod the valve guides to accmomdate my springs and lengthen my pushrod slots. now, i figured while im at it might as well go all the way. can you put 2.02 and 1.6 valves in these? or just the 2.0 and 1.55 that GM uses on the step up vortec heads? also i was thinking of doing a 3 angle valve job cuz i had a 350 that was owned by a speedshop that was pretty basic (flat tops, balanced, fuel injected heads, and a 3 angle valve job) and im pretty sure the valve job made a world of difference. can sum1 tell me what a 3 angle valve job consists of? thanks.

yes i have a set of vortec heads off a 96 truck 350 there the ones that have the 3 pointed picks on the front of them yes you can put 2.02 s and 1.60 in them 3 angle valve job consist of 3 diffrent angles ground in the seats i think the first angle is 60 deg the sec is 43 deg and the last is 20 somthing the valvs are ground at 45 deg ..

Closeup of a 3-angle valve job....
http://www.hanzenginehouse.com/HANZE...t_closeup.html
$150-$200 on a Chevy, depending on the shop and prevailing labor costs in your area.

a three angle should be one of the first things on your list. great improvement for your $$$.

ive heard the vortecs dont really benefit that much from the 2.02 and 1.6 valves. also there would probably be a bit of shrouding on the intake valve

It's a good idea to get a valve job done on your Vortecs. I lapped mine to see what I had. The seats were round and matched the valves pretty well, but all of the exhaust valve seats were too wide as well as a few intakes. I decided I could live with it, but this is a pretty mild motor.