-home made twins, stock/k31
-pdr regrind cam
-55 psi in the 2500 rpm range, I think (so many gauges to watch)
-truck rarely sees 3100+ rpm, its always loaded/towing


I think I know the answer, there probably close, and I should go ahead and order them. Just wanted some other opinions.

 

it sure wouldnt hurt to get some new springs...besides smarty is working on the 4000 rpm program...

brett

 

True, I think the only time my engine will meet 3300+ rpm is on the dyno though. More worried about the low rpm/high boost conditions.

 

Read this thread here and watch the video:
https://www.dieseltruckresource.com/...97#post1774997

 

closed course with proper supervision! I about fell out of my chair. Killer video though!

 

ur gonna want springs with that cam especially

 

My truck definetly does not pop/miss like that truck in the video did.

Would there be any increase performance when using the exhaust brake?

Will the heavier springs have any effect on the long term wear of the cam, with the increased pressure.

Who sells the F1 sportsman springs the cheapest?

How hard is it to install springs?