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Old Apr 28, 2005 | 11:44 PM
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Default 3-4 clutch pack

Has anybody had any issues with the Raybestos Z-pack. Its a single sided clutch system. The selling point is better heat tolerance. I've been using Alto Red 9 clutch packs in my builds with no issues so far but those steels are very thin and I'm afraid what some higher than normal heat would do to them. I know there are some experienced builders in here so please chime in with an opinion. Help out a novice builder.

Mec
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Old Apr 29, 2005 | 02:21 PM
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if i were you i'd talk to dana at probuilt automatics, do a search, he'll help you with some tricks and explain your options. i'm running 8 clutches with no problem so far didn't burn even with a torn seal
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Old Apr 29, 2005 | 04:32 PM
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What clearances did you use in the 3-4 pack? I'm doing mine this week-end. What clutches you recommend?
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Old Apr 29, 2005 | 04:50 PM
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Originally Posted by Sotiri
What clearances did you use in the 3-4 pack? I'm doing mine this week-end. What clutches you recommend?
I've been using 9 plate Alto Red and I try to keep the clearance around .035. I,ve been wanting to try the Zpack single sided 3-4 clutches without using a customer is a guinne pig so I might install them in my car to see how they hold up.

Mec
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Old Apr 29, 2005 | 07:34 PM
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I'm running the Z-Pack in my car. Just installed, I've made 6 - 10 second passes at the track and about 200 street miles so far.

Not as harsh as the Red Alto pack (Ran that in my last rebuild) for street driving.

So far, so good!
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Old Apr 30, 2005 | 12:04 AM
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Originally Posted by BudH
I'm running the Z-Pack in my car. Just installed, I've made 6 - 10 second passes at the track and about 200 street miles so far.

Not as harsh as the Red Alto pack (Ran that in my last rebuild) for street driving.

So far, so good!

Thanks for the shout. I didnt know much about them but if they are holding up to 10s maybe they are as good as advertised!

Mec
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Old Apr 30, 2005 | 02:41 AM
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The 9 clutch Borg Warner Hi-Energy 3-4 pack is what I have been using in a low 10 second 1996 Firebird. I can't speak to how the Z-pack will hold up, but I will continue to use the BW 9 clutch setup, as this has proven itself for the last few years.
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Old Apr 30, 2005 | 04:12 PM
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Originally Posted by Pro Built Automatics
The 9 clutch Borg Warner Hi-Energy 3-4 pack is what I have been using in a low 10 second 1996 Firebird. I can't speak to how the Z-pack will hold up, but I will continue to use the BW 9 clutch setup, as this has proven itself for the last few years.
I,ve built a few with the BW high energy with no complaints also. I guess its going to boil down to preference.

Mec
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Old Apr 30, 2005 | 04:58 PM
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I just had my tranny rebuilt with the Z-pak clutches, but won't the trans won't get installed for at least a couple of weeks. Time will tell.
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Old Apr 30, 2005 | 10:06 PM
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Chime in here and give a comment if you would when you get it on the road. Thanks.

Mec
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Old May 2, 2005 | 09:06 PM
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Originally Posted by Pro Built Automatics
The 9 clutch Borg Warner Hi-Energy 3-4 pack is what I have been using in a low 10 second 1996 Firebird. I can't speak to how the Z-pack will hold up, but I will continue to use the BW 9 clutch setup, as this has proven itself for the last few years.
Which steels do you use in the 9 clutch stack. I,ve used Kolene and the standard thin steels. I've also used a 8 clutch BW setup with standard thickness steels with good luck. Have you used the 8 clutch setup with any luck?

Mec
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Old May 3, 2005 | 01:38 AM
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The vast majority of what I build uses the 8 clutch Borg Warner Hi-Energy setup with 2 .128 steel pressure plates, .055 5 tang apply retainer, 4 or 5 .080 Kolene steels, 2 or 3 .060 Kolene steels, & a .062 snap ring is used to achieve .030 - .040 clutch clearance. The 9 pack is for maximum longevity at the drag strip, or for someone who has 600+ HP.
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Old May 3, 2005 | 09:10 AM
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Originally Posted by Pro Built Automatics
The vast majority of what I build uses the 8 clutch Borg Warner Hi-Energy setup with 2 .128 steel pressure plates, .055 5 tang apply retainer, 4 or 5 .080 Kolene steels, 2 or 3 .060 Kolene steels, & a .062 snap ring is used to achieve .030 - .040 clutch clearance. The 9 pack is for maximum longevity at the drag strip, or for someone who has 600+ HP.
Thanks for the reply. I've used the 9 plate setup for numerus street driven cars. I guess its just a little overkill but I've had no returns because of burned 3-4 packs. Thanks for the input. It helps alot!

Mec
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