98cherrySS

iTrader: (2)

I have about 45,000 miles on Comp 918 springs and I'm wondering if I should replace them. Cam is a TR224. I've never had an issue with them. I don't like fixing things that aren't broke but I don't like replacing engines either.

Darkman

iTrader: (2)

I would replace them.

Ryne @ CMS

iTrader: (10)

it would be a good idea to pull some off and verify pressures... it also wouldnt be a bad idea to just pull them and replace them... i personally prefer the PSI beehive over the 918's, but it seems you have had success with the 918's

Sales2@Texas-speed

iTrader: (5)

Definitely pull a few and get them checked!

98cherrySS

iTrader: (2)

Well if I pull a few to check I may as well go ahead and pull them all and replace them.

Ryne, why do you like the PSI beehive over the 918's? What other springs would you consider? I feel like Comp quality control has been falling off a bit in recent years. I'd be interested to hear your opinion too Matt.

Sales2@Texas-speed

iTrader: (5)

We like the PAC beehives. The 1218's would do great for that one, and they work with your existing hardware!

98cherrySS

iTrader: (2)

By hardware you mean retainers and locks?

TransAmcoupe98

iTrader: (10)

Ive heard too many stories about the PACs, especially here lately on the boards. I used the beehive 918s with that exact same cam in my first LS1 for many miles. I would definitely replace them for sure. You'll be fine with another set of 918s, they dont have the problems in these new era 918s as the other ones did a few years back.

Sales2@Texas-speed

iTrader: (5)

Yes, same seats, seals, locks, retainers as your 918's use!

Brian Tooley Racing

iTrader: (13)

Please consider my .660" Lift Dual Polished Platinum springs with tool steel retainers for $219 shipped. Thanks

https://ls1tech.com/forums/new-produ...its-219-a.html

garygnu

I believe TSP sells the spring compression tool.

Rock777

iTrader: (2)

I just had a friend do the same thing on my Dad's 99. Had about 35K on 918's and replaced them with PAC 1218's. He didn't pressure test the old ones, as was pointless at that point, but he did say they had a slight sag of maybe 80-90 thousandths. I also had the plugs swapped right away while in there and taking the old ones out. Haven't driven yet, prob no noticeable differerence, just peace of mind.

wildcamaro

iTrader: (15)

Yep the aftermarket springs are brittle and not meant for longevity that's for sure...I'm running comp 918s on a 224/230 and they have been good for 2k but at your mileage it's a cheap easy move for insurance...

ZDER

iTrader: (3)

Not to highjack the thread but i have the comp 918s aswell and probably have around 20k miles on them with the crane 1.82 rockers and a stock cam, would it be advised to change them aswell?

01ssreda4

iTrader: (96)

I agree, cheap insurance.

PREDATOR-Z

They have lived their life, time for replacement. PSI 1511 would be an upgrade.

98cherrySS

iTrader: (2)

What would the PSI 1511 offer that the 918's don't? Any springs out there that last 50K?

96capricemgr

iTrader: (1)

With a stock cam I would not worry about 20K miles.

For the OP and 45K mileson an aftermarket cam with more aggressive lobes and lift, and rpm they should have been changed long ago.

98cherrySS

iTrader: (2)

Picked up the 918's today. Figured I'd go with what I've been using.

98cherrySS

iTrader: (2)

Installed the 918's. That took much longer than expected. All the retainers were stuck and centering the new springs was a pain. I ender up using the trick flow spring compressor and I had to drill out the holes to accomodate the studs. Here's the valvetrain all buttoned up. All is well.