Help me out here, I know where a posi disk brake rear is out of a 88. I have a 92 Z with drum. Is it worth the switch or keep looking for a newer 10 bolt with disk?

Glad to be back up online.

92 z conv
5-spd
few upgrades but working
just installed Alston sfc

 

come on guys, tomorrow is the only chace I can get it for a month

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Did the switch from drum to disc for various reasons, but frankly I'm not sure the effort was worth the money or the results in braking power. If you're a regular street drive, save your money and effort.

JamesC

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i'd stick with what you have. your not likely to gain much by switching unless your racing or drive hard alot. might be better off just doing a conversion on your rear end by adding discs to your housing.

 

I race it in SCCA events here local. I was wondering if it was worth it with the smaller axles and if the brakes were up to par with the 89 and up J65.

 

I would say it's not worth it. The 88 back disc brake system sucks, though the rear itself might be the BW 9-bolt, which is said to be a somewhat less weak piece than the GM 10-bolt.

Hold out for one with the later disc system if you're looking to do a brake upgrade.

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"So many Mustangs, so little time..."

 

The 92 has 28 spline axles. The 7 5/8" ring gear still isn't as strong as the BW 7 3/4" but the larger axles are a good start on a 10 bolt that can be made even stronger.

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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car and knocking on the SuperPro ET class
383 stroker (carbed) with double hump cast iron heads and pump gas
Best ET on a time slip: 11.857
Best corrected ET: 11.163
Best MPH on a time slip: 117.87
Best corrected MPH: 126.10
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!

Member of the Calgary Drag Racing Association

 

thanks for the help everyone, if someone knows of a good disk system out of a 91-92 near Indiana, e-mail me OK.

Jeremy

 

I'm nowhere near Indiana but I just picked up a '92 rear disc, posi, 3:42 for my '84 Z28 for $300......guess i am gonna have to update my sig.......HEHEHE

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"84Z28/'91 305TPI comp cam flowmaster TB coolant bypass/shutoff valve to heater core MAT relocated Ram-Air(home-made) gutted air-box IROC ground effects/wheels GY245/50's 700R4 superior shift kit/ corvette servo(excellent shift kit BTW) Rebuilt engine and transplanted it myself. Love this engine!
LOW performance people should drive low performance vehicles!

 

must be nice, I am about ready to go to TX to get one. This sucks not being able to get what you are after.

Jeremy
92 Z conv
5-spd
alston sfc, few other mods,no big deal

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I replaced the 3.23 open drum in my 84z28 with a pre 87 9-bolt posi w/ 3.27s. I love the fact that I have a posi vs an open. I no longer get the 1-wheel peal and my handleing is better for it too. 3.27 is the optimal gear ratio for the 700R4, but it isn't much of a change from the 3.23s I had.

As for the addition of disk brakes, I don't really care. They look cooler (added Powerstop cross drilled rotors), but they don't stop any better/worse then the drums did. I bet it is a few extra pounds off the rear though.

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock... all the suspension stuff... 9-bolt posi disk is in... K&N filter... 93 octane...

-=ICON Motorsports=-