OEMs have used these for centuries (literally). There are a couple of variations such as being slightly larger in diameter or having narrow-angle thread grooves to produce a friction fit. ----- Original Message ----- From: Ralph Alder To: 'Bob Bundy' ; [email protected] Sent: Monday, May 04, 2009 9:56 PM Subject: RE: loosening turbo to mani and turbo to d/p nuts
I, for one, have seen these posted here, and I have the same question then as now: just how do self-locking threads work? It isn't obvious from the catalog page drawing. Are the threads cut fore instance, instead of say 24 tpi do they have 23.5tpi and just jamb fit in the hole or is there a much more clever method? Ralph Alder Curious In Orange Co. ------------------------------------------------------------------------------ From: [email protected] [mailto:[email protected]] On Behalf Of Bob Bundy Sent: Wednesday, April 01, 2009 11:05 PM To: [email protected] Subject: Re: loosening turbo to mani and turbo to d/p nuts Anybody use these studs? They have self locking threads on one end. I plan to use 10mm self locking thread studs and the wedge lock washers when I put things back together. http://www.mcmaster.com/#self-locking-threaded-studs/=19k229 Driven on the street I never have a problem. lots of track duty and everything goes wrong. Bob ----- Original Message ----- From: Bill Cardell To: Emilio - 949Racing ; MiataPower Sent: Wednesday, April 01, 2009 10:04 PM Subject: RE: loosening turbo to mani and turbo to d/p nuts We have had studs come out, mainly on track driven cars. I'd have to disagree about the stage 8s, though. They also address the stud coming out. TurboDog's Dad Bill Cardell www.flyinmiata.com 1-800-FLY-MX5S 970-464-5600 tech support Don't miss our Summer Camp! August 6-9 ---------------------------------------------------------------------------- From: [email protected] [mailto:[email protected]] On Behalf Of Emilio - 949Racing Sent: Wednesday, April 01, 2009 9:40 PM To: MiataPower Subject: Re: loosening turbo to mani and turbo to d/p nuts My experience has been that its more the studs backing out. So even, stage 8's, Nordlocks, safety wire and what not doesn't always fix it. Someone at MRLS mentioned that FM may be switching to or optionally offering 10mm studs with their kits. The extra surface area does seem to make them stay put longer. 10m studs have been de rigueur for turbo Miatas that see a lot of track use but its trickling down to street cars slower it seems. I haven't tried green, hi temp cylindrical bonding Loctite but that might help. Another fix might be staking them, but that may raise cracking issues with cast manifolds. Jason, you don't track your car do you? That's when stuff falls off :) I've seen daily driven turbo cars that have never had an an issue on the street, not make one session at the track before a stud or two backs out. But to answer your question yes, it's endemic for turbo track miatas. Emilio Cervantes www.949Racing.com 26242 Dimension Dr #130 Lake Forest, CA 92630 949.716.3111 phone / fax On 2009-04-02 03:05, Jason C wrote: > A lot of people seem to have this problem (though not me)....I want to understand why some do and some don't. Â Some do despite the fancy serrated FM washers.Do FM see this problem? ---------------------------------------------------------------------------- _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower ------------------------------------------------------------------------------ _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
_______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
