Thread: Can L76 Springs be used with an XP Cam??

Thanks for that useful post...I'll look into it...Right after I install a few XP's and S1X's with L76 and LS6 springs.

.............................maybe you should check your springs...see how they're doing. Hopefully you didn't get stuck with one of the bad Mexico batches like thousands of others did.

OP: Like stated, I ran LS6 Springs for over 40k...got rid of them and my XP for 130's and the Thrasher for my build. I daily'd the car for about 2 years that way then parked it and shoved it aside. On any aftermarket cam using the stock chain/dampner...I would however tell you to yank off the front cover and check the dampner every 50K or so...because depending on where the idle is set at, it could chew it up pretty quick. I had my idle set at 750. Dampner was almost gone after 40,xxx. Or you could bypass all this petty back and forth bullsh1t and get Manley 130's. Then you could really rev it and utilize every bit of the powerband of the XP and not have to worry about which valve springs to buy.

Originally Posted by bluegtp91

Thanks for that useful post...I'll look into it...Right after I install a few XP's and S1X's with L76 and LS6 springs.

.............................maybe you should check your springs...see how they're doing. Hopefully you didn't get stuck with one of the bad Mexico batches like thousands of others did.

OP: Like stated, I ran LS6 Springs for over 40k...got rid of them and my XP for 130's and the Thrasher for my build. I daily'd the car for about 2 years that way then parked it and shoved it aside. On any aftermarket cam using the stock chain/dampner...I would however tell you to yank off the front cover and check the dampner every 50K or so...because depending on where the idle is set at, it could chew it up pretty quick. I had my idle set at 750. Dampner was almost gone after 40,xxx. Or you could bypass all this petty back and forth bullsh1t and get Manley 130's. Then you could really rev it and utilize every bit of the powerband of the XP and not have to worry about which valve springs to buy.

130s are overkill for an XP cam, there's no reason to rev out higher than about 6300 without headwork and a bigger cam. The 105s are perfect. L76s aren't good enough and LS6s are a poor choice as well since they're harder on the timing set and less effective against valve float than the 105s (among many other reasons). This is why your damper was gone so shortly.

Your sarcastic attitude doesn't help your lack of knowledge and logical thinking. It's abundantly clear that you don't know anything about the variables I was mentioning before, and you most likely built your car using the he said/she said method.

L76s are rated to .520 lift and the XP is like .536, and over .550 if you have a 1.66 rocker like some 3800 engines... at the installed height on our motors, which will usually come in a little shorter than 1.8, you're losing even more lift capability. The spring is also too soft to handle the ramp rates of the xp cam. Anyone who uses these springs hasn't done their homework. The "countless" people you're talking about must be hiding in the woodwork... or be broken down on the side of the road right now.

Maybe someday you can stop jumping down my throat in every thread and you might learn something.

Originally Posted by SnowFlake

L76s are rated to .520 lift and the XP is like .536, and over .550 if you have a 1.66 rocker like some 3800 engines... at the installed height on our motors, which will usually come in a little shorter than 1.8, you're losing even more lift capability.

that is the information the OP needed in the first post.

The lift is not going to work for the XP. The best spring for this application would be a Crowe 105#