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> PMS bar mount failure, the picture
siverson
post Apr 25 2006, 10:53 AM
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siverson
post Apr 25 2006, 10:53 AM
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Aaron Cox
post Apr 25 2006, 10:54 AM
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(IMG:style_emoticons/default/chowtime.gif) roasted P. Motorsports (IMG:style_emoticons/default/smile.gif)
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siverson
post Apr 25 2006, 10:54 AM
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siverson
post Apr 25 2006, 10:57 AM
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He refused to replace it under warranty or offer any sort of credit so it was the last part I've bought from him (after having spent $000s there).

You guys should all really use a bulkhead mount. It's the only way to do it right and the Rich Johnson mount is awesome.

-Steve
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Rand
post Apr 25 2006, 11:04 AM
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Wow. It's clear in those photos that welding problems are only part of the picture. That failure is an engineering flaw.
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Trekkor
post Apr 25 2006, 11:06 AM
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PMS's wall mount uses the same cradle mounting flange as the bar mount

Those last pics really burn me up.


KT
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Cap'n Krusty
post Apr 25 2006, 11:09 AM
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He's still selling them because there are people still willing to buy them. There are ALWAYS people looking for a shortcut, and are unaware of the pitfalls therein. The Cap'n
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Trekkor
post Apr 25 2006, 11:12 AM
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What to do, what to do?

KT
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Rand
post Apr 25 2006, 11:16 AM
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http://www.914conversions.com/html/mount.html
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grantsfo
post Apr 25 2006, 11:25 AM
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QUOTE(trekkor @ Apr 25 2006, 10:06 AM) *

PMS's wall mount uses the same cradle mounting flange as the bar mount

Those last pics really burn me up.


KT


If anything I would think that PMS wall mount would be more prone to having failure due to it being more rigid than the bar and same engine mounting flange as the bar.

So are you still thinking of fixing the bar or going to a new mount?
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fiid
post Apr 25 2006, 11:26 AM
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QUOTE(Dan (Almaden Valley) @ Apr 24 2006, 02:54 PM) *

And how was it again, that the factory 6 engine mount was attached???? (IMG:style_emoticons/default/dry.gif)

What was that, did someone say bulkhead? (IMG:style_emoticons/default/smile.gif)


I think Trekkor has heard that by now; have you read the rest of the threads? Talk about (IMG:style_emoticons/default/dead horse.gif)


I didn't realise (didn't spend much time thinking about it (IMG:style_emoticons/default/smile.gif) ) that the quick-6 bars had to come so far forward to mount to the motor. We have the same problems with the subaru mountings because the subaru engine mounts are at the back of the motor - causing the same problem in the other direction.

It's impossible to even make it work without additional support on the subie motor because the distance is even further away from the stock bar location than it is with a quick six, and the subie motor only has two mount bolts - so there's no resistance to the flex. I tried this setup and the motor could bounce about 4-5 inches. Because I have removed a good portion of my trunk floor I was able to catch this by standing on the tranny and bouncing up and down to check the strengh of the mount - which is not possible with a regular 6 or 4 setup.
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Trekkor
post Apr 25 2006, 11:27 AM
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Thanks for the link.

I am thinking of a way to prevent the bar from moving foward and thus rotating downward.

If I can fab up a bracket that would be attatched to the firewall so the bar would be stabilized, I may be able to continue.


KT
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Aaron Cox
post Apr 25 2006, 11:29 AM
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QUOTE(trekkor @ Apr 25 2006, 10:12 AM) *

What to do, what to do?

KT


RJ mount (IMG:style_emoticons/default/smile.gif)
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brant
post Apr 25 2006, 11:35 AM
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[/quote]
If anything I would think that PMS wall mount would be more prone to having failure due to it being more rigid than the bar and same engine mounting flange as the bar.
[/quote]


I don't know...
the wall mount is under different forces.
the bar going forward and flexing up/down is a very very different force

brant
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Aaron Cox
post Apr 25 2006, 11:36 AM
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[quote name='brant' date='Apr 25 2006, 10:35 AM' post='667367']
[/quote]
If anything I would think that PMS wall mount would be more prone to having failure due to it being more rigid than the bar and same engine mounting flange as the bar.
[/quote]


I don't know...
the wall mount is under different forces.
the bar going forward and flexing up/down is a very very different force

brant
[/quote]


and it has bushings to take up some of the forces.....
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fiid
post Apr 25 2006, 11:36 AM
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The pictures of the Patrick bar illustrate IMHO that it's a pretty crappy design - it puts a lot of force on one section of the bar in torsion... It seems like there is little or no triangulation of this on particular section.

I've tried to illustrate this:




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fiid
post Apr 25 2006, 11:42 AM
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Hmm - this problem looks similar!

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SirAndy
post Apr 25 2006, 11:43 AM
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i know i'm beating a (IMG:style_emoticons/default/dead horse.gif) and grant already hates me, but trek, common, you spent more on GAS to get to the track and back in one weekend than it would cost you to get the Rich Johnson Bulkhead mount.

the RJ mount is extremely sturdy and even allows for two 911 sport mounts to relieve some of that force.

all i ask is that you *think* about it ...
(IMG:style_emoticons/default/beerchug.gif) Andy

http://www.914conversions.com/html/mount.html
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Aaron Cox
post Apr 25 2006, 11:44 AM
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QUOTE(SirAndy @ Apr 25 2006, 10:43 AM) *

i know i'm beating a (IMG:style_emoticons/default/dead horse.gif) and grant already hates me, but trek, common, you spent more on GAS to get to the track and back in one weekend than it would cost you to get the Rich Johnson Bulkhead mount.

the RJ mount is extremely sturdy and even allows for two 911 sport mounts to relieve some of that force.

all i ask is that you *think* about it ...
(IMG:style_emoticons/default/beerchug.gif) Andy



(IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/pray.gif)
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