Tootall

iTrader: (78)

Is there a short life on these? I'm being told that they're only good for 15K miles. This is the first that I've heard. I've got some noobee telling me other wise.

Sure, big cams tend to be harder on everything . . . I know that it's a given.

The search on tech is down, or I'd search it myself.

SOMbitch

iTrader: (8)

Lift, lobe intensity, correct installed height and driving style all affect spring life. 17k on PRC dual golds (cam in sig) and all is well. I have heard of people getting as much as 45k-50k with pretty aggressive cams so I don't believe it is the issue some make it out to be.

3rdgentug

iTrader: (23)

it also depends on if your really aggressive driving all the time.

my lifts not huge, my duration either

and i dont drive like a raped ape everywhere, i also let my car sit n warm up befor i start driving , even in summer.

mine will last much longer then someone that doesnt do those things even if they have a less aggresive cam

'02 WS6

iTrader: (73)

As stated before lift and lobes have a huge impact on spring life. I'm running the T2 cam w/ XER lobes, which are really hard on springs albeit @ .598 lift on PRC .660 springs. They've lasted 20k miles now, no problems, but I'm switching to a Pat G cam on LSL lobes, so I'm swapping in new springs for peace of mind purposes.

Regardless, I've always heard between 20-30k miles to pull them and run a pressure test on them. If all is well, keep running them.

PewterScreaminMach

iTrader: (7)

I've got Patriot duals in my Patriot LS6 heads with a 224/228 581/588 113 cam and about 25,000 miles on the setup. No issues so far (knock on wood) and it's running the best times it ever has at the track. It's not an aggressive cam, though, so it should live a long life (at least until I buy my new H/C setup).

Like everyone else said, the cam lobes and lift will be the major determining factors.

wht01ws6ta

iTrader: (45)

Same here, I figured if a spring is good for .660 lift then it should be able to handle .595 or .598 lift for a while. Always easy on them until getting engine up to operating temp. Not sure if I will have mine checked at X amount of miles or if I'll swap to different heads before that. What happens if they break?

BriancWS6

iTrader: (18)

Be VERY glad you have that inner spring! You will experience valve float at this time, and I would hope all of us performance minded fellas would know something was wrong immediately and shut down and start checking things.

01ssreda4

iTrader: (96)

i agree.....

wht01ws6ta

iTrader: (45)

Always good to have a back-up spring in case one of them snaps huh?

Not sure if I've ever experienced valve float on stock internals and a stock limiter or my current set-up with a 6700 limiter but I would hope it would be apparant if it occurred.

blubox

iTrader: (5)

I said the most you wanna push em is 20,000 then replace. That's with a .648 lift on a 660 spring.

bigfatls6

iTrader: (34)

Me personally if my springs had 15,000 miles on them and the heads were off I would replace them to save a serious head ache later down the road. The peace of mind knowing your springs are good is well worth the cost. Now if I were the one that bolted the heads on new and knew the use of the engine and what abuse it had it would be a different story. It depends on your cam also. if you have a cam with a 640 lift and 660 lift springs I woul at leats want to check the spring pressure at around 20,000 miles unless they were really hard miles and then you better check them sooner.

Tootall

iTrader: (78)

You said, they have 9K miles on them, (only to find out that they had 6K)so I only have 11K miles on them left.

the cam that it was used with was a TR224 . . . a very low lift cam.

Jon@Texas-Speed

iTrader: (18)

With a 224 cam, I would think you could get 20K out of them pretty easy. At that point, you might pull a couple off each side and have the seat pressures tested. If they are still good, throw them back on or if you want just replace them. I would expect them to still me good at that point but it is something you need to check. It's just good maintenance.

Jon

blubox

iTrader: (5)

Yeah, do the math...they have 9k...only have 11k left...That's 20k. You said they had 6k later on...That was reference to you telling me they had 9k on them.

Like BIGFATLS6 said. If I was the one who bought them originally then maybe I would just check them at 20,000. But buying used springs...What's the point? For $250 you can buy new ones. Might as well just buy new ones and not have to worry about it for 20,000. Instead of takeing someones word and going through the headache of getting the springs checked, takeing them on/off the heads.

Either way it goes, if they last 40,000 miles, that's great. I hope I get 25,000 miles outta mine.

allbaugh_04

iTrader: (6)

So if i were to get a cam with .598 lift...should i even get the ones rated at .600?

Tootall

iTrader: (78)

it's all related to seat pressure, lift, power band of the cam, your pocket book, and your goals.

Tootall

iTrader: (78)

no problem, they had less miles on them than I thought.
There's nothing at all wrong with buying used springs. Espically ones that were used on a low lift baby cam.

You were doing the same thing that I would have done, get the price as low as you can.

BTW: these are the Patroit Extreme springs, the ones with the super 7 locks. They go for 275 new. The ones that you're thinking of use the stock locks.

blubox

iTrader: (5)

Your right, I was. Wasn't going to pay 1,000 for used heads that cost 1200 with same springs/locks/retainers brand new.

I'm not gonna argue about it though, I didn't drive over there with 800 bucks for nothing... I was gonna get them. Since that didn't work out I bought all new parts.

I will let you know how the car dynos/runs in the 1/4.

SladeX

been lucky with mine, 40k miles, almost 2 years, just passed emissions with flying colors a week ago.

TR224 + PRC Gold Duals, your mileage may vary, but I am one abusive bitch to my car, -20 degree starts this winter, 6.5k rpm shifts (highway and track, but not during winter), t-stat busted for a month in -20 temps...

always let the car warm up slowly, and never ran high rpm until full temp, and take it easy for first 20 mins after a cold start.