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Weak spring after 40 runs??
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DRR Sportsman
Picture of Mike Frizie
posted
Pac 1248 spring , 1.80 int rocker, 1.75 exh rocker. Cam is .500imt .490exh . Anyone got any thoughts?


Michael Frizie
ET 2471
 
Posts: 637 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR Sportsman
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We had two sets break springs after 30 runs. Ours were set up too far from coil bind and cavitated. We went to a bigger spring and shimmed it up. Now we've gone to a more reasonable cam we probably don't need the crazy spring pressures.
I recently found a crack on the exhaust rocker boss on #1. Leaking water.
It's easy to go too far fixing it too.


No matter how many times you paint over a shadow it's still there.


 
Posts: 684 | Location: Galesburg Il. | Registered: December 10, 2006Reply With QuoteReport This Post
DRR Pro
Picture of Alaskaracer
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Was running the same spring. Had issues with unstable valve train and breaking. Changed to psi with exact same setup and problems gone...


Mark Goulette
Owner/Driver of the Livin' The Dream Racing dragster
www.livinthedreamracing.com
"Speed kills but it's better than going slow!"
Authorized Amsoil Retailer
 
Posts: 1539 | Location: Back home in Alaska! | Registered: February 13, 2011Reply With QuoteReport This Post
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