JUST DID MY HEAD @ A BUDDY'S SHOP ( FIGGA MACHINE SOUTH NJ ) IT TOOK 015 TO CLEAN UP . WENT TO CUMMNIS TODAY AND SPENT 269.00 FOR UPPER SET AND WAS TOLD TO GO WITH STANDARD THICKNESS , IS THAT THE CORRECT CHOICE FOR TAKING 015 OFF HEAD ?


Larry

 

Since the head is flat, it won't change compression running a standard thickness gasket. It will change the valve depth and injector depth, which may cause piston-valve interference if running an after market cam or even the lash too tight. If you run a thicker gasket, you'll be dropping compression. Best thing to do would to have a valve job done so they are recessed further into the head. Then you would also have to adjust valve spring seat pressure, as it would decrease.

 

Thanks!! I decided not to touch valves , we removed and I had zero issues before head gasket started leaking . So if I install after I just shaved 015 off head with stock gaskit I will have bent valves ?

 

I'm not saying you will, but your valves will now be .015" closer to the pistons than what they used to be. There should be .050" or so clearance between them when factory, so now you could be in the .035" range. Still clearance, but getting out of the comfortable range.

 

I want to keep it simple , should I take gaskit back and get 010 over to be safe ?

 

If your future plans include a cam, then yes a thicker gasket might be a good idea.

 

No cam , next step bigger turbo . Should I install the standard gasket ? Or go with 010 ?

 

I would not run the over gasket, personally I would have the valves sunk the additional .015 if I were too worried. I don't think you will have an issue.

 

thanks guy's!!! Spoke to Lenny @ DDP and asked him about 015 mill, he said for a street truck I'm OK with standard gaskit. Just took delivery of his stage 2 Inj and he said the supplied shim is fine for what I have . Anybody have a guess hw much HP I will have after stage 2 inj ?