runing gasket sealer

[warrior333]

would running gasket sealer under the jug hurt anything or is that all a perfect measured set up? then also has anyone ever noticed a thin indention right above the piston on the head.

 

[jasonp]

would running gasket sealer under the jug hurt anything or is that all a perfect measured set up? then also has anyone ever noticed a thin indention right above the piston on the head.

You can use this in place of the base gasket not for the head gasket. You should still measure deck height and make sure you have .040" of deck assembled and check your piston to valve clearance.
This will give you more compression and the closer you get to .040" the better combustion chamer burn you will have. Get's a better quench band and will run cooler. The only thing that would hurt you is the cam timing.. the more you lower the cylinder the the cam timing becomes retarted. I don't think it's enough to be notable, though.
I'm not sure if your talking about the piston or cylinder head. Maybe the valve relieves?

 

[warrior333]

im just worried about the jug sitting to low and causeing the piston to hit the head but you said i could check the piston to valve clearance how do you do this?

 

[jasonp]

To measure deck height...
Put piston at TDC. Cylinder head off. Measure how far down in the bore the piston is. I had I believe .035" down in the bore with a .020" base gasket not torqued... You should always torque or make sure you leave space for that. Then I had a .027" head gasket giving me roughly about .060" untorqued. Which is a little wide yet. Next winter I will take the base gasket out to achive my .040" and just run a high quality (temp) silicone.

 

[jasonp]

im just worried about the jug sitting to low and causeing the piston to hit the head but you said i could check the piston to valve clearance how do you do this?

Well if you pulled the head you'd see a valve hitting the piston or something...
But if you head is still on. Take the valve covers off. Turn your engine over to TDC. Put a dial indacator on the valve retainer and then push down on the rocker arm. Should be at least .050" on the intake. .060" on the exhaust.

 

[jasonp]

what mods do you have done?

 

[warriorcliff77]

Piston to Valve Clearance: I can tell you when i did mine (measured with the clay method)
I have the Wiseco 10.25:1 piston, .390 White Bros cam and Kibblewhite HD springs. I had between .146 and .150 piston to Valve Clearance. I have also had the head decked .010. So no worries there.

Clay Method: I removed the head, put 2 pieces of Silly Putty in each of the valve reliefs on the piston. Reattached the head, torqued the bolts to spec, then turned the motor over by hand 2 complete revolutions. Remove the head, carefully remove the Silly Putty from the piston. Then i measured the indents in the putty with a micrometer.

 

[warrior333]

thanx i got it down to the valves i just got a gasket