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brake booster upgrade question


bladekinslayer

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I justed finished doing the brake upgrades to the front and rear of my 92 cutlass convert.

Everything works great! Stopping is way better. :biggrin:

E-brake works too! Although upgrade took some modding to the the pedal bracket to make it fit, but nothing major.

 

Now I've read that you can upgrade the brake booster to a bigger one from a 96-97 w-body.

 

My question is can I use the orginal master cylinder from my car with the new booster?

Or do I have to change them as a matched set? (booster & M.C.)

 

The car does not have ABS.

 

Any other tips on this mod would be great.

 

THANKS!

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you read this somewhere?

 

I discussed to possibility of doing so in another thread titled something to the effect of powermaster III.

 

but i will have to experiment to see if it is even possibile

 

to be specific... the 3.1 model cars have a 10 inch diameter booster, and the 3100 have a 12 inch one.

I have no data on any of the 3.4 cars...

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you read this somewhere?

 

I discussed to possibility of doing so in another thread titled something to the effect of powermaster III.

 

but i will have to experiment to see if it is even possibile

 

to be specific... the 3.1 model cars have a 10 inch diameter booster, and the 3100 have a 12 inch one.

I have no data on any of the 3.4 cars...

 

I hate how you act as if you're the God of all-things-W. It annoys the hell out of me.

 

The booster swap has been brought up multiple times. I'm fairly sure people have already done it. Anyone who's done a '94+ 5 speed swap will have had to have swapped down to the older booster, so it for sure has to go at least one way.

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I hate how you act as if you're the God of all-things-W. It annoys the hell out of me.

:leaving: Sorry!

The booster swap has been brought up multiple times. I'm fairly sure people have already done it. Anyone who's done a '94+ 5 speed swap will have had to have swapped down to the older booster, so it for sure has to go at least one way.

oh? err what? our french canadian member REDGTP has done this but I'm not aware of any others.

Anyhow... I've not seen any thoughts of upgrading brake boosters before.

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The booster swap has been brought up multiple times. I'm fairly sure people have already done it. Anyone who's done a '94+ 5 speed swap will have had to have swapped down to the older booster, so it for sure has to go at least one way.

oh? err what? our french canadian member REDGTP has done this but I'm not aware of any others.

Anyhow... I've not seen any thoughts of upgrading brake boosters before.

 

I know brian g(I think it was him) did it in his car as well. And, I know there are other 94-96 guys over on 60* that have done some wierd swaps.

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I hate how you act as if you're the God of all-things-W. It annoys the hell out of me.

 

Yeah, no kidding, because that would be me!

:joke: Nah, I kid, I kid.

 

to be specific... the 3.1 model cars have a 10 inch diameter booster, and the 3100 have a 12 inch one.

I have no data on any of the 3.4 cars...

 

3.4 cars got the bigger booster in 94 as well. It was an across-the-board MY1994 change on all except Luminas. Poor Luminas. They didn't even get the revised rear calipers in '94.

The old MC does fit on it.

I have a new MC and meant to swap mine out, but never found the motivation since my 89 stops just fine and I hate bleeding the brake lines.

I'm not sure if I'll ever find the motivation to swap it. :lol:

 

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I hate how you act as if you're the God of all-things-W. It annoys the hell out of me.

 

Yeah, no kidding, because that would be me!

:joke: Nah, I kid, I kid.

You aren't the god of W-body? ok I'll stop worshipping you now. :lol:

 

3.4 cars got the bigger booster in 94 as well. It was an across-the-board MY1994 change on all except Luminas. Poor Luminas. They didn't even get the revised rear calipers in '94.

The old MC does fit on it.

well I think I;ve learned a little more. I should assume then that my incomplete 5 speed swap of a 282 into my 91 CS cannot use the larger booster then... but that my other cars will be able to then. Time to do this and geeez... do a quick write-up. If only I had the time. (just like others I haven't done yet)

 

last question.... did the 93 CS with a 3100 have a larger booster?

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Yes, in fact it's a fact - you cannot use the larger booster w/5-speed. Every person who has done a 5-speed swap into a 94-96 said they had to swap to the smaller booster. I think it's likely the larger booster will fit into your other automatic cars, but as I mentioned before, I have no proof because I'm too lazy/unmotivated to actually do it even though I have all parts on hand.

 

Good question the 93 CS w/3100. I have no idea, but my guess is that it would NOT have the larger booster. The larger booster to me seems more of a model year change that is independent of engine changes.

 

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Good question the 93 CS w/3100. I have no idea, but my guess is that it would NOT have the larger booster. The larger booster to me seems more of a model year change that is independent of engine changes.

What? :lol: my way of thinking is the engines all changed from 93 to 94 so it would be the same thing :lol: of course... we need to find out what they did with the buick 3800.

I'd bet that a hollander interchange would prove useful to verify the 93 CS 3100.

 

ok... to install in theory, if the booster mounts without any problems, the issue I can see will happen is that the the feed line to the heater core may have to be moved out of the way, and all the wiring and hoses that go up and over the booster on a 3.1 car will have to be slackened and then pulled up and out of the way. and the M/C should mount fine.

 

the result of the larger booster should be stronger assist. not a bad addition to any W-body.

 

And I advocate the 94+ rear brake swap which bladkinslayer has already done.

I would like to do the parking brake mechansim swap too, but haven't.

as for the front brake upgrade, I wouldn't do it unless I had to replace the struts, since it results in smaller gains, unlike the rear upgrade, which utilizes a totally different and better brake upgrade.

 

but back to boosters... I say do it!!! I will try myself sometime soon.

 

EDIT! my 93 3100 engine supplement shows the newer booster! they must have changed!

 

 

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Thanks for all the input guys!

 

I've gotta go to the wreckers for some other stuff, so I think I'll get a booster as well and go for it.

 

Keep ya posted on how it turns out.

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