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Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
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Brake caliper carrier machining question
I didn’t want this getting lost with the caliper grease questions, so I’m starting another post.
The E46 non-M to M brake caliper carrier is unobtaium right now. The adapter would allow me to use an M3 caliper and M3 CSL rotor. I’ve had a set on order since last November with Turner/ECS for my track 330 and the projected ship date keeps getting pushed back. Now it is mid September. That said, I have a new pair of E36 M3 carriers, but the mounting flange needs to be machined to match the unobtainable carrier. What do you think? Would I be taking too much off, considering it will be the same as the Turner/ECS part? Edit: when I ordered mine, they were about $155 per pair. Now I see them for $45 per pair. Probably a mistake. For grins, I ordered a pair, but they’re not due till mid September as well. If my machined calipers don’t work, I can see which one of the ordered caliper carriers comes in and cancel the other order. ![]() ![]() ![]() ![]() Last edited by A930Rocket; 05-15-2022 at 04:49 PM.. |
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How do you know how much to machine off?
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Scott '78 SC mit Sportomatic - Sold |
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Taking a step back, is this too much work and risk vs seeking a solid aftermarket brake system?
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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I think it's more a time frame problem Chris.
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Scott '78 SC mit Sportomatic - Sold |
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
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So how much material needs machined off? 2) what is the thickness after?
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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I would be cutting off about 7 mm at each flange. I would have to double check the remaining material.
Big brake kits are stupid money for this car and not worth it to me. This will run me about $600 all in with rotors, calipers, and carriers. This gives me a little bit bigger rotor with a little more heat sink capacity. Is it worth it, maybe, maybe not. But I’ve spent stoopider money in the past. It keeps me busy and out of trouble. |
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Is the first pic what you want to end up with? So after machining 7mm off, how much thread depth will you have left? I cant believe you measure in mm, LOL.
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87 930, |
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Still Doin Time
Join Date: Nov 2004
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Quote:
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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I'd make sure there aren't any heli-coils in those threads before cutting.
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Scott '78 SC mit Sportomatic - Sold |
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My inner engineer says it wouldn't be a problem machining off the 7mm due to the direction of the forces.
And as far as exact fitment goes you could add shims to get perfect alignment. |
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
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Average machine shop could end-mill that off nicely on a few mins.............
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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That’s a super easy machining job. If you were local, I could do it for you in about 30 minutes. I don’t see any stress issues.
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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Thanks guys. I talk to the machine shop today on the way out of town and he said no problem. These things are big and heavy, so I suspect everything will be good.
What’s funny is, I have the original bolt installed and you can’t see the end of it. The original bolt is 26 mm and I ordered 40 mm bolts. The calipers are fully threaded. |
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Quote:
I guess working on a German car made me think in millimeters! The machine shop didn’t have any problems with my numbers. Of course during the week, I work in feet, inches and fractions. We will see when I install them this weekend. I’m hoping if I was off, that it was in taking off a little too much material. I can always shim it to center it on the rotor. These carriers are for an E36 M3, which weighs more than my stripped out E46 330. So stress wise, I think everything will be good. Will find out when I go to the track next month…. Edit. Looking at the pictures made me think, I should just go ahead and replace the bearings while I’m in there. ![]() Last edited by A930Rocket; 05-16-2022 at 04:25 PM.. |
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