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Discussion Starter #21
Just a quick question, if the rubber mounts don't last very long, what is the life span of these delrin mounts?

I told my gf that the car vibes seemed to quiet down. So she sat in it and we went for a drive. She agrees somewhat and even asks me why is that? I told her the mounts finally got broken in. Long story short, she's not a big fan of the vibes but we both agree that its a bit more tolerable now. Therefore I probably didn't lose my hearing or much of it.

On the other hand, I did order some sound deadening mats:

http://www.amazon.com/Noico-Self-adhesive-Automotive-Insulation-Installation/dp/B012AVX5HQ/ref=pd_sim_263_6?ie=UTF8&refRID=1FR34A4W53916FWWKDF2&dpID=71r3IwI0xEL&dpSrc=sims&preST=_AC_UL160_SR160,160_

On my next day off I am going to put these all over the trunk and all four doors. To see any difference. I know they weigh the car down but its only 50 pounds, which is nothing once I turbo this thing lol.
 

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i have had the 2j mounts for many years now
they have gone thru many track runs
hard launches and mountain runs
no wear at all

the ES mounts allowed engine movement
were too soft for sudden drag launches

and joe wore them out in two races
they lasted me about 3 months

i changed the mmi's about every 4-5 race days
never had to replace travis's mounts but they were incredibly hard

the new 2j delrin mounts have the right durometer hardness to resist wear and motion
but don't resonate with the engine vibes and imo are very livable
and race-able
 

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Barry - As far as I know, Joe never advertised 1st Gen and 2nd Gen mounts separately; nor have I ever heard anyone else mention them. Did the 1st Gens ever go into production?

If they did, what are the differences between the two? How do I know which ones I have? I ordered them on March 24th, 2013. I think that they're pretty harsh, but I don't have the other Gen to compare them to.
 

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i got to test out all kinds of stuff

they just recently brought my heim joints up to producion status

the 1st mounts were only used in real race cars prior to production
when i got to try them on the street they replaced my ES ones

they were fabulous on the track

but the hardness was resonant with the frame structure [actually picked up and amplified the vibration]

a discussion with the supplier yielded a slightly different durometer number, that vibrated at a different, non harmonic vibration with the unibody

the result was a very noticeable change in smoothness

since i have never heard anybody else complain of the car shaking so bad,
parts fell off and the alternator shook itself apart

i would have to guess i was the only one to use these
on the street

never saw production
is my guess

not always good to be the first
lol
 

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sammy and jon and jamal had rides at this stage

none could stand it
headaches, and a strange dizziness
was often the response

extremely tiring to drive

i have none of that now


i thought at the time this was just a sacrifice to track it

joe suggested the engine shock mount and rubber oem mounts for a fix
tried that for several months
great on the street , not so much on the track

had to go back to solid mounts
by then in production

could not believe the difference
they were as good as the shock mount in vibes
and way better on the track

i never looked back
 

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I know that on some other platforms, it's not uncommon to run a torque damper and solid mounts simultaneously. The mounts keep the engine in place and the damper supposedly reduces vibrations transmitted into the cabin.
 
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