DeTomaso Mailing List: February 98, Message #25
     



From: 	JDeRyke@aol.com

Subject: Re:  Fw: Fw: FPP 4145 update

Date: 	Sun, 1 Feb 1998 16:29:25 +0000



John, either Snap-On or Craftsman makes a "professional" air-powered valve

spring compressor at an outrageous price (as I remember--can't find either

catalogue right now) that will handle any spring. Your seated pressure seems

very high, even for a 7000 rpm roller cam set for drag-racing. Jack Roush told

me that with SVO alloy heads, seated pressure should not exceed 145lbs @1.900"

height or the seats would recede into the heads from the pounding. The SVO

catalogue verifies this. How long do your other valvetrain components last? I

assume you're running iron 4V heads? J DeRyke