tennerv8

iTrader: (7)

Just what it says guys. Any ups and downs of either spring? Are they essentualy the same? Which is best?

GT Griller

iTrader: (8)

From what ive read the PAC is the people who used to make the comp 918s....and it seems the recently the comp 918s have been having issues.

tennerv8

iTrader: (7)

Yeah I heard that comp had a bad batch or something. I thought I read that they kept breaking.

fortmyerspolice

iTrader: (7)

I heard they fixed the problem. lol

Tom@SpeedInc

iTrader: (5)

for anything cam wise .600" or less i'd go with PAC 1218 springs

DaveX

I think comp is on a "new-new-revision3" version or something.

GMCtrk

iTrader: (23)

You can get the PAC 1218s from SDPC for $122

405HP_Z06

iTrader: (11)

Agree^^^^^^^

tennerv8

iTrader: (7)

Huh. I think I checked the sdpc website awhile back and couldnt find them. They do have them?

GT Griller

iTrader: (8)

Ur better off calling them or PMing jesse (scoggin dickey) on here for a price....theres alot of stuff thats not on the website that they do carry.

SOMbitch

iTrader: (8)

Yea there website is hard to find stuff sometimes. Just call them and when get the parts dept ask for Jesse.

Dam beat me too it. Notice time haha.

BlackScreaminMachine

iTrader: (17)

Running Revised Comp Cam 918's on my Vrx4 cam which is 228/230 in the .58x" range with out issues.

Unfortunately comp got a bad rep because the last set did have failures but here on Tech you get to hear all about it. Never mind the fact that I would say some if not at least half were do to install error or improper matching of spring requirement to intended use of the cam.

I also have used the original 918's circa 2005 on a 383 LTX motor w/o issue. If I had the Batch # still id post it but like I said, you dont know until you try.

Pac-1218's are a great spring too, they have a great track hist and at that point you need to make a decision.

99_SS_LS1

iTrader: (4)

I run the PAC 1518's on my .609 lift, they are more expensive than the 1218's but are good to .650 lift. I think they are the same spring but the 1518's are nitrated?

Either way, I've heard nothing but good about PAC springs

tennerv8

iTrader: (7)

Awesome guys. Looks like im leaning towards the pac's at this point.

Chrome355z

iTrader: (1)

Yep, PAC1218 and 1518 are great springs.

I beleive PAC made the comp springs in the past. Then comp dumped them for a cheaper supplier (mexico maybe) and that's when they started have problems with the 918s. PAC has NEVER had any problems as far as I'm aware.

Should get a little better performance over the duals fwir.

thunderstruck507

iTrader: (18)

running the PACs here, got a good deal from a sponsor here, blancoss or something like that, my memory sucks...same guy that has the good plug/msd wire deals all the time

GMCtrk

iTrader: (23)

http://www.sdpc2000.com/product/SDL1...S1Setof16.aspx

99blancoSS

iTrader: (115)

Thank you



PAC used to make the spring for Comp but Comp switched and then had breakage issues. They have remedied it from what I've heard but given the choice I'd take the PAC first. PAC did not have an issue. THe 1518 from PAC is a superlative nitrided spring as well, good to .650 lift. I have them both in stock. Both are direct drop in replacements.

Yes I do have them for a good price as well

thunderstruck507

iTrader: (18)

haha I was close

I have about 4k miles on mine so far, no complaints *knocks wood*

slt200mph

iTrader: (42)

There have been more than one bad batch of the Comp 918 springs over the last 5 years..on the other hand the PAC springs have been excellent over the same time period with no bad batches...go with the PAC springs ...