No, Im not kidding, Seriously!

I figured out that Beretta/Grand Am brake rotors work on 88 brake systems. They are a direct replacment. They are smaller in overall diameter, however the 88's dont use the outer 3/8" of the rotor so the Beretta/Grand AM actually fit, They are only about 1/16" thicker and are about 1/16" closer to the wheel witch the caliper can compensate for easily. 20$ a rotor! What do you think?
Stock rotor:

Stock rotor with Beretta rotor sitting on top:

Profile picture:

Sounds like an idea to me! You might want to try a pair of GA/Beretta rotors on the back first, just to be safe.

I think people have been doing this for a while. I could be wrong, and I hate to burst your bubble but check the archives to be sure.

Otherwise, Nice find!

I'm assuming you're using the '87-'91 Beretta rotors, right? The '92-'96 rotors were about 3/4 inch larger diameter, and are a worthwhile upgrade to the earlier Berettas.

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PLEASE read about brake mods in the Ogres cave!
Link at bottom of this page.

Neptune, What does his article have to do with 88's and rotors? Im not talking about converting the calipers too, just pointing out a cheep alternative to getting new 88 rotors. I dont see any mension in his article relating to the 88's at all.

Measure and compare the inner and outer hat diameters. 88 owners have been using cavalier rotors for a while, but since the inner hat diameter is smaller on the cavalier rotor, they have had to machine their hubs smaller to get them to fit. Have you actually tried mounting this over an 88 hub? If it fits you have made a new discovery.

I already ordered 4 new 88 rotors, When the last one comes in, I will fit the beretta rotors before I put the 88 rotors on. probably tomarrow.

I have read about using those rotors on the rear of 88's but they will not fit on the front unless the front hub is machined down a little.

Here's my swap of 97 Cavalier rotors on all 4 corners of an 88. I've done this to both of my 88's without any issue.

https://www.fiero.nl/forum/Archives/Archive-000001/HTML/20031110-2-037620.html

quote Originally posted by Fierobsessed: Neptune, What does his article have to do with 88's and rotors? Im not talking about converting the calipers too, just pointing out a cheep alternative to getting new 88 rotors. I dont see any mension in his article relating to the 88's at all.

Your'e probably right. However, lots of people read these posts, and brakes are not something to be casually experimented with.
A little extra knowledge can't hurt.

Is the centering hole on the beretta brake rotor the same diameter as the '88 Fiero rotor also?

The 88 front hub is, simply put, HUGE. No way the Beretta rotor will ever fit over it! At least unless you have the excess machined off.

the front and rear rotor on 88's are the same are they not?

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"As we live on, we lose a little bit more. Shrouded in falsehoods and lies, we stand frozen to the spot, unable to cry out" - Deep Forest

Yep, so are the pads, glide pins and the steel part of the caliper. Good to know.

So, are the cavalier and beretta rotors the same part number?

Sounds like the next time I need rotors, I should resurface the two best and put them on the front.

Then order Cavalier / GA / Beretta ones for the rear?

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88 4cyl auto Fiero, AC, sunroof
"And isn't sanity really just a one-trick pony anyway? I mean all you get is one trick, rational thinking, but when you're good and crazy, oooh, oooh, oooh, the sky is the limit!" - The Tick

No, my cave article would not apply here. At least nothing beyond the warnings and cautions.

I don't know if the different rotor would have any good or bad effect on things like brake cooling. It shouldn't change brake forces in any way.

The main thing I would worry about with this is making bloody sure nothing will bind up. Either at the start or as things wear in. For example, you wouldn't want the slides forced to the limit at any time. The slides need freedom to move not only for wear but thermal changes etc. Same for the piston. Remember the rotor and pads expand when they get hot. The brakes may seem ok cold but bind when hot if there isn't enough slack in the system. This would be very bad.

I'm not sure why, but all rotors seem to have a considerable "rim" around the outter edge that isn't used. There could be some sound reasons for that besides they just wanted more metal. Getting closer to the edge may not matter but I would avoid using a rotor right to the edge. This might could leave the pads hanging over the rotor under some conditions. Remember that the caliper and pads move when they are loaded. Just like an old record player with a bad needle... the pads want to track off the rotor durring braking. You won't be able to easily duplicate this loading in the shop.

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Edison Carter: When did the News become Entertainment?
Murray: Since it was invented.

The Ogre's Fiero Cave (It's also at the top of every forum page...)

theogre,

Thanks for your great article. Unfortunately someof your links in the article no longer work. Is it possible you have them cached or archived and could link to them?

Thanks,

AutoWhiz

The forum items that were linked to the brake article have been moved to the forum archives. Use search up above.

MotorAge went thru a management transition awhile back. I don't know what articles they have posted to the new site. Motor and most other comercial links still work.

Other links will get messed with when I get time. The fiero cave is a low priority right now. sorry.