hey guys i got 918s non stripe springs on my car
i have used them with my 2 cams and are on the car currently with my second cam and i have 16k on the springs as i drive the car everyday

how long are you guys going before you swap to new springs???

 

I have roughly 20K-23K on my 918s and over 200 track passes along with some street races with no problems. I'll switch mine out in a few months for some new 918s.

 

I was planning on changing mine at 20k intervals. I dont go to the track much or live in the redline.

 

The guys at TR say 918s will theoretically last indefinetly on the the cams they sell . . . so I think it depends on the specs of your cam.

 

I have a B1 cam. I plan on going at least 40K before changing them. The car hardly sees any track time....

 

it all depends on the spec of you cam, the bigger, the shorter theyll last, thats what ive been told

 

I would think that ramp rates are probably one of the most important factors to take into account. Faster ramp = lots more wear on valvesprings....

 

Not true, they recommended I switch my 918's after 10k on my TR230/224 cam.

 

I've actually been running 941 springs for 18k miles without any problems with my TR 224 cam

 

I've got 19K miles in the past 12 months. I don't drag race and am rarely at redline, but I do auto-x. I have the non-blue stripe version installed, but have a new set waiting. The longer I wait the more paranoid I am. I broke Rev 1115's the last two summers, at between 17K & 22K miles.

 

How old are your non-blue stripes? If they are from the "bad batch" era in the spring of '02 then you might have cause to be concerned, but if they are older (like winter '01/'02 or before) I would not worry.

If you had a spring from that bad batch I'd think it would have broken long before now.

I would not sweat 19K unless you've got a real aggresive cam and/or big heavy valves.

 

...i was scared on the 918s since they sent the bad batch out and did not recall it or cover swap expenses and warranty work on the defective product, etc... ...so I bought REVs...

 

I purchased the non-blue stripes around June 24th, 2002. I think I have Rev valves, 2.02/1.57, and the cam is a 218/226 527/535.

 

I would not worry

But obviously, it's your car and your call. Personally, I have a 221/221//.558/.558 cam with stock valves and 772 ti retainers, and I rev to 6400rpm max. Car does not see redline very often, and I don't intend to replace them any sooner than 30-40K. I bought mine in november/december of '01.