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Re: Portland area meetup?, Brake pad questions
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Mick,
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Re: brakes, "not racing" doesn't mean you don't have to stop that quickly. Stuff happens-- deer, idiots on the highway, etc. The difference is heat: on a race track you are doing a lot of hard braking, and you need a hard compound that won't soften. But a hard compound is no good when it is cold. We've run the gamut and went back to factory pads (made by Textar I think), they work very well over a wide range. Measure your rotors, 30/22mm (front/rear) is the minimum (for S4+). And respect the factory 2mm min pad thickness, that's more about insulating the pistons, seals and fluid from the heat. We always leave the calipers in place for pad replacement, just push the pistons back with the pads and then pull the pads. Opening the bleeder is a good idea, and partially bleeds the system when you add fresh fluid to the reservoir. But a full flush is also a good idea. Porsche uses "damping plates" which stick to the back of the pads to reduce brake squeal. Not expensive, the problem is that they have fingers which extend into the allow pistons and don't allow the pads to just be slipped out. We don't bother. Adding a bit of high-temp anti-seize compound to the steel pad backing plate does help-- on the edge where the backing plate meets the caliper, and on the back where it meets the piston. And sometimes they squeak. Pad warning-sensors are a one-time deal, the rotor edge saws through a wire loop embedded in plastic. So if the warning goes off, the offending sensor needs replacing. And if the rotor has a lip, then the warning goes off early. Our sensors were bypassed by a PO long ago and not missed, it is easy enough to check the pads. Cheers, Jim ----- Original Message -----
Date: Sat, 2 Sep 2023 15:41:45 +0000 (UTC) From: "mick cowles via groups.io" <mickcowles@...> To: [email protected] Subject: [PacNW928] Portland area meetup?, Brake pad questions Michael B- It would be great to meet up sometime! I was thinking some Portland area meetups would make sense. Ken and I were talking about tinkering with the vacuum line on my automatic transmission. (Shifts hard when coasting in stop and go traffic). Also, I just shot Tom928 an email seeing if he might be interested in getting together for some projects. It would be cool if other Pacnw928 guys could join us, but it may not be practical due to the distance involved. I'm always happy to help people with 928 projects...heck, I don't even care if its a 928. I just enjoy wrenching and learning about mechanical stuff. Probably, the most urgent task on my shark is to swap out the rear brake pads. I've done brakes on Corollas, but never on a 928. Seems pretty straight forward. I'm down to 1-2 mm on those rear pads. When Ken took a peek at the rotors, he thought they might be good for one more set of pads. So I'd hate to score up these rotors by putting the job off too long. (Who knows if the brake pad sensors will work, right??) Pacnw928 guys- I could use some advice on choosing the right brake pads. I've driven a lot of beaters in my life, and the stopping distance of those cars was terrible, so anything I put in the 928 will be better than what I'm used to. I'm not racing, so I don't need to stop that quickly. Also, I don't care that much about dusting. I can't see thru to my calipers and rotors, so dust doesn't bother me. My priorities are a pad that won't eat my rotors quickly, and one that doesn't squeak. Any suggestions? Also, some advice about the best suppliers for 928 brake pads would be appreciated. Thanks! Mick On Friday, September 1, 2023 at 04:29:51 PM PDT, Michael Benno <michael.benno@...> wrote: Hey,?all?it was great to meet up with you all. Meet some new faces and reconnect with some old ones. Keith, you are a very generous host.? Peter, I am so impressed with your 928 journeys!? Mick, I am in Portland and would be happy to meet up whenever. Let me know it you need anything.?? On Fri, Sep 1, 2023 at 9:19?AM mick cowles via groups.io <mickcowles@...> wrote: Peter- Glad you got the hood issue sorted out and got a chance to look at the timing belt. It was a pleasure meeting you and talking about 928's and wines! Let me know if that Malbec I gave you is any good. Andy- Thanks for taking the group photo. My sister and friends enjoyed seeing that. They've been following my journey with the 928 repairs since inheriting it, and were glad to see I got some help and have met some friends! Pacnw928guys- I mentioned getting together in the fall. I'll start rattling everyone's cages again in a couple months! If anyone is near Portland and needs help with anything before then, feel free email me or text at the number below. Best Regards, Mick Cowles (503) 484-4226 On Monday, August 28, 2023 at 09:26:33 AM PDT, Peter S s/v Dawa II <scottpeterd@...> wrote: It was great to finally put some faces to online names.? I had a great time. The run back gave me a chance to sort out the mixture on the CIS.? I came back up via 101/3 through Shelton.? Sunday was an antique car show, so I stayed a while. Ken: ?stopped at Napa and got some lithium grease.? The bonnet now works! And thanks everyone for the help on adjusting the timing belt. Sadly, this was pretty much the last trip for the 928.? This weekend I leave for 2 months for sailing. ? Cheers -- 1992 Porsche?928 GTS Japan market ----- End of Original Message ----- |
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