Lawdogg

I have the Stage 2 heads with the Manley 221435 Dual spring kit. Factory intake valve with ss exhaust valves. I'm not looking to debate the ss exhaust valves/dual valve spring valve train stability issues. Just wondering how long should I expect the valve springs to last. I've got about 10,000 miles on them with 10 or so track days. My cam specs are pretty close to the Katech k501 cam specs. Is it time to replace the springs? Thanks!

Dirty Howie

I went more than double those miles and more track days on my WCCH before I decided to port them. I had the BT springs. They and all the other components were fine and reinstalled after the porting by Richard. I have the stock cam. I would ask Richard ........


DH

RamAir972003

I'm at 12k with my set up. On gt-20 cam 112 lsa.

Lawdogg

Thanks Guys! I guess I might go another summer, but I'll have my builder talk to Richard.

American Heritage

Really should be pulling a spring or to to put on a tester to see where they are at. They are more than likely still fine but you really should not be guessing or going off how long other forum members ran their springs. when in question always measure. Have your guy pull a few off and test them (open and closed).