Are motor mounts free? I don't have my GCR handy. BMW uses a fluid filled motor mount which isn't particularly strong in a hit....suffice it to say one of mine is not healthy . I was wondering what my options were.
Thanks
R
Are motor mounts free? I don't have my GCR handy. BMW uses a fluid filled motor mount which isn't particularly strong in a hit....suffice it to say one of mine is not healthy . I was wondering what my options were.
Thanks
R
Rob Breault
BMW 328is #36
2008 Driving Impressions Pro-ITA Champion
2008 NARRC DP Champion
2009 NARRC ITR Champion
2009 Team DI Pro-ITR Champion
Mounts are not free. Must be stock.
Jeff L
ITA Miata
2010 NARRC Champion
2007 NERRC Championship, 2nd place
2008 NARRC Championship, 2nd place
2009 NARRC Championship, 2nd place
Thanks Jeff....are you sure your not just saying that?
R
Rob Breault
BMW 328is #36
2008 Driving Impressions Pro-ITA Champion
2008 NARRC DP Champion
2009 NARRC ITR Champion
2009 Team DI Pro-ITR Champion
I just was wondering the same thing since I'm about to put the motor backin the car. Motor mounts must be stock but trans mounts are free - my understanding from others and my review of the GCR. But if I'm wrong please correct me before it's to late....
Cheers,
Ben
BenSpeed
#33 ITR Porsche 968
BigSpeed Racing
2013 ITR Pro IT Champion
2014 NE Division ITR Champion
The way I read the rules I would have to agree with Jeff also, we are stuck with stock engine/trans mounts.
But I'm curious how many other vehicles have issues with "relatively "fragile" mounts? I know I have to treat them as a consumable, even with the allowed additional stay rod. It seems odd that we can add a stay rod and we can replace suspension bushing but the motor mounts are off limits. So does anyone else have any thoughts one way or the other?
~Matt Rowe
ITA Dodge Neon
NEDiv
***So does anyone else have any thoughts one way or the other?***
You could call the flexible motor/trans material bushings. Then you could use Spherical bearings as your material. (Yes I understand bushings are tubular.)
We ALL have options when we don't like the IT rules. Why should the IT rules be changed closer & closer to Production rules? Why don't people who need more free rules move to a class with more free rules ?
The fun part IMHJ of the original glossary definition of Bushing is that the word had NOTHING to do with suspension bushings. The rule had to do with installing a sleeve or tubular insert as a linear bearing or to salvage a worn part.
GCR Glossary
Bushing/Bush - A sleeve or tubular insert , whose PURPOSE is to reduce the dimension(s) of an existing hole.
The friken rubber suspension things are to reduce noise & make up for irregularites of lack of perfection. Not to reduce the dimensions of an existing hole.
Have Fun
David
I'll have to disagree with you there. Suspension bushings do indeed reduce the diameter of an existing hole. At the 25hour in 2005, I had a rear trailing arm front bushing disintegrate during my stint due to the exhaust getting too close (from someone's prior off road excrusion).The friken rubber suspension things are to reduce noise & make up for irregularites of lack of perfection. Not to reduce the dimensions of an existing hole.[/b]
Can you say 1" of dynamic toe adjustment? Turning was not a problem, going straight was! The high speed kink at on the back part of the course was especially hairy. When it came time to pit, I was very much looking for something to reduce the diameter of the hole. :P
Jeremy Lucas
Fast Tech Limited
Ben and I talked about engine/tranny mounts. Engine obviously stock - tranny I say stock too. Can't find any allowance in the GCR for alternate material.
If vibration is an issue, you can always go to a stayrod.
only one? if you hit something hard enough to break one, i bet the other is toast too. and the tranny mounts would now be suspect. both my stock bmw engine mounts and both of my uuc tranny mounts sheared off in my front end "incident" on labor day. entire drive train moved forward several inches since is wasn't connected to anything anymore.. system basically worked as designed to absorb the energy of the impact.Are motor mounts free? I don't have my GCR handy. BMW uses a fluid filled motor mount which isn't particularly strong in a hit....suffice it to say one of mine is not healthy . I was wondering what my options were.
Thanks
R
[/b]
marshall
Another point is that UUC also makes what they call The Enforcer. Basically an aluminium sleave that goes over a stock transmission mount that stiffens it up. I know IIDSYCYC, but you're still using the stock mount and the moving transmission does cause shift linkage bind which this helps as it stiffens up the mount.only one? if you hit something hard enough to break one, i bet the other is toast too. and the tranny mounts would now be suspect. both my stock bmw engine mounts and both of my uuc tranny mounts sheared off in my front end "incident" on labor day. entire drive train moved forward several inches since is wasn't connected to anything anymore.. system basically worked as designed to absorb the energy of the impact.
marshall
[/b]
James
STU BMW Z3 2.5liter
***The friken rubber suspension things are to reduce noise & make up for irregularites of lack of perfection. Not to reduce the dimensions of an existing hole.***
***I'll have to disagree with you there.***
Jerremy, do ya think that the OEM intent of the rubber suspension thing was to reduce the existing hole?
Second question:
Do ya think the ORIGINAL Glossary definition of the word Bushing/Bush had any reference to the rubber suspension things that reduce noise & make up for irregularites of lack of perfection?
Have Fun
David
ps: Sometimes it's good to stay some what grounded when reading the rules/glossary.
David, I don't think we'd have SBs today if that had been the operative definition. But there is a separate one for "Suspension Bushing" and it uses the word "bearing" so, of course, that opened the door to things that were never envisioned by anyone as being a bushing.
Bill Denton
02 Audi TT225QC
95 Tahoe
Memphis
Bill, thanks for grounding me.
Y'all think I should stay stock on the trans mounts? Anybody running anything but stock? The ones I want to put in are urethane.
Ya know, those engine mounts are "suspending" the engine and transmission...hmmm, looking through the GCR for the legal-to-the-letter definition of "suspension"...strange...none found...
It's amazing how one silly little "clarification" of a rule can be so wide-reaching...what a surprise...
I like the way you think Greg. Here I've been replacing stock rubber mounts with more stock rubber mounts like some kind of sucker when all I had to do was squint really hard while reading the rulebook.
I'm still just curious how many people have to treat motor mounts as common maintainence items, or maybe I should ask how many people AREN'T using stock mounts?
~Matt Rowe
ITA Dodge Neon
NEDiv
...., or maybe I should ask how many people AREN'T using stock mounts? [/b]
Uhh...yea...
My informal eavesdropping in post race inpound yeilded this quote from the owner of a blue honda this summer at Lime Rock..., " Those? aluminum..... Illegal? Sure! (laughing), but what do I care? I make 'em for guys....need a set?"
Uhhh yea....your question might be the one to ask....
Jake Gulick
CarriageHouse Motorsports
for sale: 2003 Audi A4 Quattro, clean, serviced, dark green, auto, sunroof, tan leather with 75K miles.
IT-7 #57 RX-7 race car
Porsche 1973 911E street/fun car
BMW 2003 M3 cab, sun car.
GMC Sierra Tow Vehicle
New England Region
lateapex911(at)gmail(dot)com
I'm using stock motor/transmission mounts, but I would sure like to go to polys.
I'm still just curious how many people have to treat motor mounts as common maintainence items, or maybe I should ask how many people AREN'T using stock mounts?
[/b]
Bill Stevens - Mbr # 103106
BnS Racing www.bnsracing.net
92 ITA Saturn
83 ITB Shelby Dodge Charger
Sponsors - Race-Keeper Data/Video Aquisition Systems www.race-keeper.com
Simpson Performance Products - simpsonraceproducts.com
We have stock bushings in the Audi's and yes, they can be a problem and need to be replaced every years or so... more frequently if we are involved in an "incident."
Raymond
RST Performance Racing
www.rstperformance.com
So what happens if I do the trans mounts - Do I become a cheater? (I bought these but they aren't installed yet.)
The aluminum motor mounts for this car is supposed to be a top handling enhancement - do I become a double weezle if I use those?
Not looking to put myself into a world of pain by doing this stuff.
I guess the big question is what are guys doing in the NE? Stock everything? If so, then I will to. But if folks are running solid mounts, so will I.
Reaching out to the experienced ITA folks and rules folks for direction. I do not want to be pulling these out after buying and installing.
Thanks
BenSpeed
#33 ITR Porsche 968
BigSpeed Racing
2013 ITR Pro IT Champion
2014 NE Division ITR Champion
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