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| 88 Brake Master Cylinder (Page 1/2) |
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fliphone
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DEC 28, 10:32 PM
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Hey all! I just got my car back onto the road after a swap, and it seems that my brake MC failed as when applying brake pressure it pushes fluid into the reservoir. As well as having next to no brakes (pulling the E-Brake does just as much if not more). I can't seem to track down anything apart from a couple websites claiming to have new ones without any (real) reviews. I found a couple old posts discussing rebuilds/alternatives but they never really went anywhere. What options are out there to fix/replace the MC?
-TIA------------------
Black 88 GT, a 19 year old here about 20 years to late
-LQ1 Swap in progress-
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IMSA GT
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DEC 28, 10:56 PM
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Not really any options for the 88's. Rebuild yours, find a used one and rebuild it, or use the link below.
Special order from Summit with an estimated ship date of 1/8/2024
https://www.summitracing.com/parts/ceb-130-62030
 [This message has been edited by IMSA GT (edited 12-28-2023).]
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pmbrunelle
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DEC 28, 11:18 PM
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IMSA GT
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DEC 29, 12:12 AM
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| quote | Originally posted by pmbrunelle:
The bores aren't very different; I would try an 84-87 master cylinder.
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This should work but I heard that you may have to push a little harder on the brake pedal. I've never tried it so I can't directly comment on the pedal pressure.
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pmbrunelle
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DEC 29, 12:21 AM
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| quote | Originally posted by IMSA GT:
This should work but I heard that you may have to push a little harder on the brake pedal. I've never tried it so I can't directly comment on the pedal pressure. |
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Going from a 24 mm bore to a 25.4 mm bore increases surface area by 12%, so a driver would have to push 12% harder on the pedal for the same braking effect.
I don't think it would be very noticeable.
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cam-a-lot
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DEC 29, 01:43 AM
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Please do a search on the forum where I started a topic on this. I was not able to find a rebuilt 88 brake master. Summit and others "claim" to have them, but they do not and you spend months waiting, eventually getting a refund. There have been rebuild kits available on ebay here and there, which I bought and had a spare 88 brake master rebuilt with it.
Cannot commment on whether the 84-87 brake master would fit or how well it would work
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fieroguru
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DEC 29, 06:58 AM
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I ordered and received the 88 Fiero Summit Master Cylinder in May 2023, so it would be worth a try.
Also, check how close your rear brake pads are from the rotor. If they are too far, then all brake pedal travel will be used up moving the pads with minimal clamp pressure applied. The fronts do not see any significant braking until the rear pads make contact with the rotor. The rears are also what firms up the pedal as the brakes are applied.
The gap is supposed to be the thickness of a playing card or two.
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css9450
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DEC 29, 08:22 AM
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| quote | Originally posted by fieroguru:
I ordered and received the 88 Fiero Summit Master Cylinder in May 2023, so it would be worth a try.
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I did too. I got mine in about three days. Could be it's in and out of stock periodically.
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Vintage-Nut
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DEC 29, 11:09 AM
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fliphone
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DEC 29, 08:53 PM
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Thanks for all of the responses guys! I'll place an order for the summit one, but in the meantime I'll do some digging and see if the 84-87 MC will bolt up. I would actually kind of like a stiffer peddle, which is the biggest reason I haven't gone to the S10 booster
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