Any hotbits owners have wornout top bearings?
Posted by Sean Burke
Sean Burke Super Moderator Location: Butler,Pennsylvania Join Date: 08/21/2010 Age: Midlife Crisis Posts: 123 Rally Car: 1991 Honda CRX |
John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Joachim Sandgaard Infallible Moderator Location: New Jersey Join Date: 10/17/2011 Age: Midlife Crisis Posts: 52 Rally Car: 1990 Eagle Talon TSi AWD |
John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Joking aside, boys, OK. Everything I have seen out of Asia for aftermarket top mounts come with really undersized spherical bearings period.
Wgen I was collecting Ford 909 Motorsports parts way back when, first thing I did was look at differences between "GpN" (standard road car stuff in design) and Group A and World RallyCar stuff and measured everything. The most obvious was the tops of the strut insert: 
The fat pin is 20mm on the Group A and the threaded part is M12 x 1.5 (keeping this relevant to those Sub-a-rat things before you guys bitch me out about "what da fawk duz dis haz to do wif my beloved Impretzled?? or your attention span peters out, note that your pins are 15mm where the top mount bearing fits and M12 thread---and Group A Subies had in the mid 90s a 19mm fat pin like the Fords--which was hollow inside saveing a whopping 8 grams)(ask how we found that out!) Ford used a 22mm high-misalignment bearing that looks like this> 
Typically I see the generic Japoniasie (and other Asian stuff probably made in China) stuff around 15-16mm and I say its undersized Strength of round things goes like radius squared to the 4th power, so a couple of mm is a tremendous increase in strength--that's why i say go up to M14 wheel studs--. Anyway don't belive me, but look up what Subaru just homologated in GroupN for the new Sucus: (can't find it dammit, but what i saw just 2 weeks ago was new Homologated sperical bearing top mounts... And the ID was....... WAS...................................................... WAS 22mm. You boys oughtter study the mounts and see if there was a way to get them modded up to what some smrat guys have decided is the right size... Oh, 22mm in mythical kings segment of his thumb is 0.866 7/8" is .875 And 7/8" costs a lot less than 22mm Oh, found it: http://www.sti.jp/e/competitor/r4_homologation/data/2011/n5738/N5738_0301_VR4.pdf We don't have to be tooo smart and heaven forbid that anybody should ever accuse me of being smrat, but I am astute enough to learn from those with a lot more resources and more riding on their decisions... You guys came get smart, too. John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Anders Green Ultra Moderator Location: Raleigh, NC Join Date: 03/30/2006 Age: Possibly Wise Posts: 1,478 Rally Car: Parked |
I first read the thread title as "Any hobbits with wornout...."
 Grassroots rally. It's what I think about. |
Matt Smith Senior Moderator Location: Wilmington NC Join Date: 03/31/2006 Age: Possibly Wise Posts: 546 Rally Car: xr4ti |
I really don't need to know how you wore out the top bearing on a hobbit! Matt Smith Racing in glorious black and red My daily life is a Saab story (sold!) |
Wilson von Kessler Godlike Moderator Location: Lookout Mountain, GA Join Date: 02/28/2006 Age: Possibly Wise Posts: 1,127 Rally Car: Colts are in Finland; now '87 325i, '89 325i |
John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Sean Burke Super Moderator Location: Butler,Pennsylvania Join Date: 08/21/2010 Age: Midlife Crisis Posts: 123 Rally Car: 1991 Honda CRX |
Joachim Sandgaard Infallible Moderator Location: New Jersey Join Date: 10/17/2011 Age: Midlife Crisis Posts: 52 Rally Car: 1990 Eagle Talon TSi AWD |
Thought the DT2 piston "pins" were 22mm.
Also, I feel like a dog who just shit on the floor when John yells in my direction. Disclaimer Edit;  Edited 2 time(s). Last edit at 01/06/2012 07:08PM by PotatoFlakeSTi. |
Tim Taylor Mega Moderator Location: Oakland, CA Join Date: 02/02/2007 Age: Possibly Wise Posts: 622 Rally Car: Mazda 323 GTX |
There are only a couple of ways to mount spherical bearings. Cheapest it to just press them in from the bottom, next would be some sort of retaining ring, most expensive is some sort of threaded retainer. I've never seen what you're working on but my money is on a press fit. Find a socket that matches the bearing size and use the inertia press (aka hit it with a hammer) Maybe a picture of the hobbit in question would help
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John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
The shaft may be 22---you have it right there, maybe you could measure. But the bearing ID who knows.... Seems like nobody can get an answer..... maybe you could measure that too. If you don't have these: 
Get some. Then you can measure the ID, OD and width. and, who's yelling?  John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
John Vanlandingham Senior Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Tony Wells Mega Moderator Location: Omaha, NE Join Date: 07/08/2008 Age: Possibly Wise Posts: 191 Rally Car: SP Evo IX #112 |
Eric Wages Ultra Moderator Location: Goose Creek, SC Join Date: 12/09/2008 Age: Midlife Crisis Posts: 280 Rally Car: 2002 WRX |
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