JZ'sTA

iTrader: (23)

I know they are double springs and they are on a set of Absolute speed heads I have.
I am pretty sure they are comp springs but dont know what kind.
Anyone?

Demon SS

iTrader: (3)

I believe Absolute typically used Comp springs, I think the 987's

99CamaroSS_

maybe 921s?

JZ'sTA

iTrader: (23)

This is what I am thinking.
I just dont know if they are the 921's or the 987's?
I was hoping there was a way to tell from the pic's.

Demon SS

iTrader: (3)

the 921's are direct drop ins 1.2xx, while the 987's are a 1.4xx

JZ'sTA

iTrader: (23)

Damn that might help.
Just need to measure them.
Thanks

tim99ws6

iTrader: (31)

They almost look like my Manley duals.

jrp

iTrader: (16)

how old are they, i know jay used both 978's and 987's.

Comp 978's: Dual springs (requires machining of spring pockets)

O.D: 1.46
I.D: .697
seat pressure: 126 @ 1.850
open presure: 368 @ 1.250
coil bind: 1.195
spring rate: 403

Comp 987's: Dual Springs (require maching of spring pockets)

O.D: 1.430
I.D: .697
seat pressure: 121 @ 1.800
open presure: 388 @ 1.200
coil bind: 1.150
spring rate: 344

Loudmouth LS1

iTrader: (10)

Well, this isn't looking good.

Edit - Is there anyway to tell exactly what spring it is from like a number on the spring or something? Cuz 978's and 987's ain't gonna cut it for my cam!