Understood and appreciated....
In our case I know its not the duration or float, the clay test prior showed we were wayyyyy good.
On top of it the prior engine with slightly higher deck measurments was fine at 8k
Thats what leads me to believe something had to "stick" to cause this contact no other reasons exist...the cause of the stick ? But Ill be dammed if Im buying a $1500 set of pistons becuase a scuff on 1 of em..... Ill just richen it up a few passes carbon will hide it
The rules says Machined, in terms to the valve pockets, On these pistons the valve pockets correspond to the valve angle so when it hits it hits flat, which in this case was nice because it didnt "ding" the piston, rather left a scuff I could proabably clean off with scotchbrite.....
Quote:
Originally Posted by johnny shot
Hey, I'm on your side, just passing on real information on what has happened in the past. But to address a few of your questions, all your stuff could be "kosher", and still have contact. And I know you know this, but with duration not being speced, that could be the cause of contact, not just lift on a "legal" setup. And as you quoted from the rulebook, it does not say 1 of 8 is ok, or 2 of 8 is ok, its says it can not be modified. It does not say modified on purpose, or modified by accident. If you have two identical engines in tear down and one has "scuffs" on the piston or pistons and one does not, there may be a problem. A piston with a mark in it from contact with the valve is modified. From first hand experience you don't want to have a judgement call made at your expense. Carry on.
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