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Author Topic:   valve springs
Dirt Full Roller

Total posts: 56
posted March 20, 2005 08:02 PM  
i need to get a set of stock diameter .600 lift springs. any suggestions

Dirt Forum Champ
Total posts: 5390
posted March 20, 2005 08:15 PM  
What is your installed height? The ones I just got from JR motorsports are 1.26 diameter 115# @ 1.80 inches.

Dirt Forum Champ
Total posts: 635
posted March 21, 2005 06:23 PM  
The only spring that has a prayer of living at .600" is a Crane 99846 or comparable H11 tool steel from other companies. I think Lunati makes a stock diameter double spring that might take it to.

If you buy the springs mentioned above, make an appt with your engine builder for 12 weeks into the season to have all the guides replaced and have him keep the 'good' springs in a box for you. You'll probably need them. Mine made it 15 races with .500" lift before ALL!!! the springs collapsed and blew the guides out. Dropped compression down to 120psi (from 190 when it was new) from the springs failing. I was nearly sick when I pulled them out and saw how bad the were. They'd bent at least .100" from being flat across the ends.

Never time or money to do it right but always time and money to do it again.

Dirt Freak

Total posts: 402
posted March 21, 2005 07:59 PM  
say it again sam!

Dirt Forum Champ
Total posts: 874
posted March 21, 2005 09:12 PM  
I ran around .550 lift all year with the springs mentioned at about 7000 rpm and didn't have one problem, going to open the year with the same motor until the new one is done.

Dirt Forum Champ
Total posts: 578
posted March 22, 2005 10:53 AM  
check out competition products in wis. they have nice .600 lift springs. dont get the cheap stuff, do it right the first time. valve springs aren't where you should try to save money!!


Dirt Maniac

Total posts: 120
posted March 22, 2005 10:56 AM  
Competition products #98213. Best quality and value.

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