Re: LT 1 350 valve to piston clearance
 

This^

Re: LT 1 350 valve to piston clearance
 

Hi Asking these questions I would assume your a newbie to stock. As Alan said did you check it the right way? In my younger years I might have run it with .060 but with the cost of everything today I wouldn't risk it. There are several ways to pick up that little clearance you need. I know it sucks but I would take the heads off and have a good machine shop cut .010 off the back of the valve. If possible move the cam a couple of degree's. What head gasket are you using? Have one custom made .05 larger but tighter on the bore so you don't loose compression. They don't cost that much. Good luck BP

Re: LT 1 350 valve to piston clearance
 

No need to apologize Ed, not only do we look forward to it ..but we all appreciate your input. You are a lucky man to have raced in the junior stock era and still be more than competitive in today's Super Stock eliminator. In the Don McElroy era, he would bolt a dummy head on the motor and with the assistance of a BFH he would hammer the valve into the piston.

Re: LT 1 350 valve to piston clearance
 

I ran .050 on exhaust side in my 350/255. Keep burnout to 5500 or less and never had anything touch, at .040 they do.

Re: LT 1 350 valve to piston clearance
 

It was with checker spring. I have since used my regular spring and it reads .080 with everything just like i am going to run it in the motor.I am new to stock. I raced super gas for years. Just dont know how far you guys push the envelope in stock eliminator.

Re: LT 1 350 valve to piston clearance
 

[QUOTE=B Parker;523488]Hi Asking these questions I would assume your a newbie to stock. As Alan said did you check it the right way? In my younger years I might have run it with .060 but with the cost of everything today I wouldn't risk it. There are several ways to pick up that little clearance you need. I know it sucks but I would take the heads off and have a good machine shop cut .010 off the back of the valve. If possible move the cam a couple of degree's. What head gasket are you using? Have one custom made .05 larger but tighter on the bore so you don't loose compression. They don't cost that much. Good luck BP[/QUOTE ] All of those suggestions are very easy to do. thanks for your input

Re: LT 1 350 valve to piston clearance
 

I agree with the above post about giving extra clearance, being on the safe side. I know from recent personal experience flirting with "too close" just cost me about $9,000.00 and set me back a season.

Re: LT 1 350 valve to piston clearance
 

I figured it would pick up some clearance with regular springs. .080 is quite adequate.

Re: LT 1 350 valve to piston clearance
 

Check your PM.

Re: LT 1 350 valve to piston clearance
 

Dan,

The exhaust valve runs much hotter than the intake and expands more.

Roland