The Ford Barn

Ol' Ron · 06-11-2020, 06:35 AM

I might suggest that you measure the piston to head clearance before you mill them. Also the L-100 cam has a very high lift so the valve to head clearance will be an issue. Not sure what heads you are using but with the l_100 cam you need all the compression you can get, to improve low speed drivability. To iincrease valve to head clearance, it should be done with a 4 or 5 degree angle to prevent the removal of too much material frm the chamber. Modifying a cylinder head can improve performance when done right.
When using the 65Cc Edelbrock heads , they have a substanel amt of valve clearance. I mill these for .050" valve clearance , then re-dome them. Boosting Cr to aprox 9:1.
You must have a reason to make a modification.

06-11-2020, 06:35 AM	#34
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: Speedway’s Valve Train Components I might suggest that you measure the piston to head clearance before you mill them. Also the L-100 cam has a very high lift so the valve to head clearance will be an issue. Not sure what heads you are using but with the l_100 cam you need all the compression you can get, to improve low speed drivability. To iincrease valve to head clearance, it should be done with a 4 or 5 degree angle to prevent the removal of too much material frm the chamber. Modifying a cylinder head can improve performance when done right. When using the 65Cc Edelbrock heads , they have a substanel amt of valve clearance. I mill these for .050" valve clearance , then re-dome them. Boosting Cr to aprox 9:1. You must have a reason to make a modification.