Cal

iTrader: (1)

How much spring presure should a CC 918 have at a half-inch off the seat? I just measured 139 lbs seat at 1.8", which I think is normal, and 273 lbs at 0.500 inch. Does this sound normal?

I've only got 10,000 miles on the springs, but just started getting a loud valve train noise.

code4

iTrader: (30)

When I bought my 918's I was told that they should have 130 lbs seat at 1.8" installed height. I checked them before installing and they were right at 130 lbs. I was also told that as long as they were above 115 with my 224 cam they were still good. Sounds like yours is stronger than mine were new?

Cal

iTrader: (1)

OK that's good to hear, thanks for the answer. Maybe I'll keep the strings for another 10,000 then. But it looks like I might need lifters . . .

hotrod44_4u

on my 98 artic white z28,i just bought some 243 heads off a vet with the yellow spring,my question is will i need different spring with it cam i'm running GMPP Hot, Int. 219/29 0.525 thanks jason

massls1guy

iTrader: (9)

You should start a new thread for your question, it's a different topic.