Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Would this car be faster with a Performer RPM Airgap?
Thread: Would this car be faster with a Performer RPM Airgap?
View Single Post
  #25 (permalink)  
Old 03-05-2011, 02:38 PM
oldbogie oldbogie is offline
Registered User
  
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 5,677
Wiki Edits: 0

Thanks: 0
Thanked 139 Times in 120 Posts
Quote:
Originally Posted by iambigperm
Just got back from testing the springs. They were 190 seat/450 open using an on-car tester. I found the box the springs came in and they are the 68385x2 springs and retainers. These number appear to be spot on for that part. I think this should be enough pressure, but my machinist said he likes at least 240 on the seat for a solid roller and did recommend heavier springs. I'm really not sure where to go from here...
Crower specs thses springs at 166 lbs closed at 1.9 inches measured between the the bottom of the retainer and the top of the pad and 469 open at 1.2 inch. Why are yours different, are there shims under the springs or is the valve stem shorter, spring pad higher?

Bogie
Reply With Quote