how often would you guys reccomend swapping springs with these. reason i ask is i am running the same .650 duals and have almost 15k on them with .581 lift on the cam. i have no issues with them and they have been good so far i just wonder about mileage?

 

Yeah...what type of symtoms would you see on a high mile spring?

 

PM Sent!

 

PRC is our sister company. They are in the building just across the parking lot. That building houses 3 5-axis CNC machines, a 3-axis CNC machine, 2 Newen valve-job machines, and a slew of other machinery, grinders, etc to get the job done

With that kind of lift, I'd say they should last about 30-35K miles before you'd even need to check spring pressure.

Back at ya!

 

My .650's are holding up just fine, no complaints here:

 

matt, thanks alot thats comforting. krambo, thats a clean looking engine!

 

Nice to hear from you, Kevin! How's your engine/truck running?

 

Real nice looking valvetrain Krambo, good to hear that the PRC's are holding up well for you.

Just curious, how would these springs compare with the Crane duals (they also offer two different LS duals)? Any similarities/differences that you're aware of Matt?

 

Doing well Matt! Truck sounds mean (love the cam), responds to nitrous quite well however required alot more converter than I would have expected. All in all, very satisified.

To the OP, sorry for goinng off topic a bit...

 

Matt,

Since Billy has your attention here. For a .600/.600 lift cam. Would you like to see the duals or a single 1518 in there? This is a DD so I was worried about the stress on the lifters.