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[Ecotec] head shave

STL17

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Hey just a quick question how much can an ecotec head be shave till the pistons hit the valves i was told 30thou is way to much is this true
 

delcowizzid

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zzp have gone as far as 0.1" on sets of L36 heads dunno about valve clearance but probably had valve reliefs cut in the pistons
 

Pub247

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50-60 thou is usually the limit been a long time since i did and v6 heads So i may be wrong.

If i remember correctly use verniers or mic from the flat surface near spark plugs holes and measure total thickness cant for the life or me remember the minimum is
 

STL17

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Ok so 30 should be sweet should i see a good increas in power

Can mod please move to v6 development
 

delcowizzid

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youll gain maybe 0.5:1 compression
 

acarmody

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Shave 30 thou and chuck in some higher comp pistons, maybe the ACL Race 10:1 compression pistons. Then your sitting on about 10.5:1, thats a bit better. Decent cam, then you will start getting a tad more power.
 

STL17

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Got a link for pistons
 
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