Greaseymec

iTrader: (9)

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

WeeWolf

iTrader: (16)

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

Sotiri

What clearances did you use in the 3-4 pack? I'm doing mine this week-end. What clutches you recommend?

Greaseymec

iTrader: (9)

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

BudH

iTrader: (3)

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!

Greaseymec

iTrader: (9)

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

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.

Greaseymec

iTrader: (9)

I,ve built a few with the BW high energy with no complaints also. I guess its going to boil down to preference.

Mec

DrkPhx

iTrader: (15)

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.

Greaseymec

iTrader: (9)

Chime in here and give a comment if you would when you get it on the road. Thanks.

Mec

Greaseymec

iTrader: (9)

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

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.

Greaseymec

iTrader: (9)

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