Coil Bind on ZZ3 & ZZ4/LT4 springs
Thread Starter
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Coil Bind on ZZ3 & ZZ4/LT4 springs
Does anyone know what these springs coil bind at? And what the maximum lift you can use with them?
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
According to the Competitions Products catalog, coil bind @ 1.160". I don't see a max lift recommendation, but since the ZZ3 cam has .510" lift w/1.5 rockers, that sounds reasonable.
------------------
82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.
[This message has been edited by five7kid (edited October 25, 2000).]
------------------
82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.
[This message has been edited by five7kid (edited October 25, 2000).]
Moderator
Joined: Jan 2000
Posts: 19,660
Likes: 311
Kevin,
I presume you're talking about the GM 12551483 oval-wire valve springs (or P/N 12495494 in the kit of 16). These springs are conservatively rated to operate with a net valve lift of 0.525". The bind height is 1.220". The target installed height is 1.780", so the maximum gross valve lift has to be under 0.560". Factoring for normal service limits, the 0.035" (or 6%) travel for float is somewhat average compared to the
5% or less of some aftermarket springs. It is probably safe to run these springs to a gross lift of 0.530" without causing fatigue and/or breakage. If those numbers are not high enough, you might want to consider the Crane 11309-1 springs or Comp Cams 986-16 sets.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
I presume you're talking about the GM 12551483 oval-wire valve springs (or P/N 12495494 in the kit of 16). These springs are conservatively rated to operate with a net valve lift of 0.525". The bind height is 1.220". The target installed height is 1.780", so the maximum gross valve lift has to be under 0.560". Factoring for normal service limits, the 0.035" (or 6%) travel for float is somewhat average compared to the
5% or less of some aftermarket springs. It is probably safe to run these springs to a gross lift of 0.530" without causing fatigue and/or breakage. If those numbers are not high enough, you might want to consider the Crane 11309-1 springs or Comp Cams 986-16 sets.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
Thread Starter
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Vader, which ones are you refering to? I'm asking about both the ZZ3 and the ZZ4/LT4 springs. I have a set of the ZZ3 springs that came on the L98 heads I got. I'm using them now with an LT1 cam and 1.65 rockers that makes it .491/.505 lift. Thanks for the info.
Thread
Thread Starter
Forum
Replies
Last Post
