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

Question in title...

Yeah they will be fine.

If he is not ****ing over stock he will be fine.

I dont mind getting 105 springs but i just wanted to check if they were needed or not.

Would switching my l76 springs for 105 springs and putting back my stock rockers all i need to do? The LS retainers on now can be used with the 105 springs correct?

Ok cool i understand. Thanks guys.

What is the best springs for an xp cam?

oh sorry lol. Your last post had me thinking there were better springs my bad lls

Originally Posted by SnowFlake

So what are you deciding on?

Also a lot of people throw **** on the comp 105 springs... I accidentally ordered them and found out later that everyone goes with crow or "pro comp" springs. Well I've have them in for about 15,000 hard miles and they're in perfect condition.

They had a few bad batches when they moved production but I've only heard good things since.

Just because you got lucky doesn't mean other people are willing to take the risk. I for one wouldn't.

Either go with Crow 105's or Get GM LS6 Yellow 90's. I ran them with my XP shifting at 6300? I can't remember...been a few years. Had them for 40K...never ran into any issues.

The reason people recommend L76 springs is because they are cheap and readily available. They do their job just like Yellow 90's...and countless people

have them in for about "X" hard miles and they're in perfect condition

...go by your method of thinking as well. In fact there is a regular on here with an XP'd, Intercooled, High Compression motor on L76's...runs like a raped ape. Commonly used for 1.9 rocker setups but they have been tried and true so far on VS/S1X/XP cars as well.

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#

Minus the 1.66 stuff.

Since no 3800 had 1.66 rockers...just 1.60.