Question about valve spring tension ??
09-25-2007, 07:12 PM
#1
Racer
Thread Starter
Join Date: Mar 2004
Posts: 363
Likes: 0
Received 0 Likes
on
0 Posts
Question about valve spring tension ??
My head is in the machine shop and I was told at height @ 1.6 the valve spring tension should be 128-130lbs , no less than 120lbs . Mine are @ 118-120 lbs, my machanist has informed me .. What should I do replace , shim, upgrade, ??? Car is slightly modified, but nothing major. Also my use is recreational weekened driving. Thanks for response ..... Davepnola
09-25-2007, 07:50 PM
#2
Rennlist Member
shimming should be used to correct height only, not to correct spring rate. Although some of those chevy driving rednecks may tell you different. Good thing I dont see any on these boards!
09-26-2007, 01:12 PM
#5
Three Wheelin'
Join Date: Jul 2002
Location: Connersville IN
Posts: 1,807
Likes: 0
Received 0 Likes
on
0 Posts
some good springs would be of benefit although those aren't too far out of spec, I assume the car doesn't stay near the redline for any extended period of time they are ok. Not sure on the exhaust ports I used a non turbo head and ported it
09-26-2007, 01:16 PM
#6
Addict
Rennlist Member
Rennlist Member
don't hurt the ceramic in the head.
I would get new springs for anything over stock boost, JMHO. The last thing you want to do is float a valve if you're out having fun with the car and you'll know you can have room for upgraded performance in the future - the head is off and at the shop.
I would get new springs for anything over stock boost, JMHO. The last thing you want to do is float a valve if you're out having fun with the car and you'll know you can have room for upgraded performance in the future - the head is off and at the shop.