Please keep this on topic. Yes I know 918's are the best, but lets ignore that for sake of this arguement.

What would you choose? 915's or ls6 springs?

Please keep in mind the price is quite a bit different. Are the 915's really worth the extra $100?

I think they're both good to about .580 lift. The 915's I think are good to maybe .600

EDIT-This is for a comp cams 224/224 .563/.563 non xer.

 

I would go with the 915's between those two.

 

Just curious, why do you say that? Is it worth paying the extra $100?

 

Well, I believe the 915's are a bit stonger and are rated to .600 lift also I believe. And the cam you are wanting to run would be right on the ragged edge of what the Z06 springs could handle.

 

hmm, did you know I was gonna run a 224/224 .563/.563?

It's not on the x-er lobes so the ramp rate isn't as fast.

 

I had 915's and switched to LS6's just for the get in and go factor. From what I've read and heard, the Comp springs are "brittle" (for lack of a better word), and require that you get some heat into them before getting too into the throttle. I have a tendency to hit my snooze button to the last possible second, requiring that I take a record breaking shave and shower, jump in my truck, and run. I usually let it heat up for about 1/2 a cigarette, but then it's go time. I've also heard that for longevity, on cams with lower lift and slower ramp rates, the LS6's will give you more miles before recommended replacement. I don't have any facts to back this up, just what I've learned here and on Tech.

 

budhayes3- yea that is why I mainly want to go with z06 springs. They were obviously built for longevity since GM put them in their vettes and nobody seems to have trouble with them wearing out.

I also hear alot of people saying don't run them on cams with over .550 of lift but I have yet to hear of one breaking.

 

Heck I thought you were going with the high lift 224 (.581 lift).....the Z06's should be fine.

 

I think that Lingenfelter recommends LS6 springs for their cams that have .570+ lift...

 

That is fact. The sell a kit that has the GT2-3 cam and LS6 springs.