Innovative mounts: 60a vs 85a - LotusTalk - The Lotus Cars Community

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post #1 of 20 (permalink) Old 03-29-2011, 05:16 PM Thread Starter
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Innovative mounts: 60a vs 85a

I've had all four 60A durometer mounts for about 6 months.
I love them, but have noticed engine rocking under hard acceleration to hard braking. The rocking is also pronounced on off<>on throttle transitions as well
as heel/toe down shifts.

Are the 85a significantly better/firmer than the 60a?
Will they impart more NVH? (not that this is an issue, just curious)

-Robert

2006 Elise ST (someone else has it now . . . )
2008 Exige S240 ST
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post #2 of 20 (permalink) Old 03-29-2011, 10:02 PM
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85A are significantly stiffer. on my RSX i was able to run just the 2 side mounts and the rear mount with 85A.

19-- Europa S2 62 Replica/Track Car Build

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post #3 of 20 (permalink) Old 03-29-2011, 10:37 PM
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You can buy just the front and rear mounts in 85A durometer.

That said, I have four 60A mounts in my Exige and 60A front and rear mounts in my Isotope Green 2-Eleven. A significant improvement over stock.

The Yellow Hornet 2-Eleven now has 85A front and rear mounts. It hasn't been tracked yet... but there seems to be a noticeable increase in vibration. Obviously not a serious issue for a track car.
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post #4 of 20 (permalink) Old 03-30-2011, 12:33 PM Thread Starter
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Thanks for the input.
The 60A is a big improvement, but after you get accustomed to something you always want something better.
-Robert

2006 Elise ST (someone else has it now . . . )
2008 Exige S240 ST
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post #5 of 20 (permalink) Old 03-30-2011, 12:38 PM
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The 85's add A LOT of vibration. We tested them on our Elise which is..or was a street friendly car at that point. We only recommend these for race cars: cars that will never see the street. throttle response was fantastic as was the shifting feel. HIGHLY recommended from a performance stand point on a track-only car. You've got to be pretty hardcore to put up with this on street
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post #6 of 20 (permalink) Old 03-30-2011, 05:02 PM
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Quote:
Originally Posted by Bill4le View Post
You've got to be pretty hardcore to put up with this on street

That sounds like a challenge to me....

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post #7 of 20 (permalink) Old 03-30-2011, 09:25 PM
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Quote:
Originally Posted by Bill4le View Post
You've got to be pretty hardcore to put up with this on street
Used to daily mine. Not too bad

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post #8 of 20 (permalink) Old 06-11-2011, 07:42 PM
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I installed the 85A's on my Exige a couple of weeks ago. I was amazed because I used to be able to see the shifter moving just revving the engine. Now, no noticeable movement just revving the engine and very little shifter movement at the track.

However, if you think there were little vibration noises on the stock 111, now it's 10x the rattling. The engine even sounds louder inside the car because it's vibrating the whole frame - imagine tapping a tuning fork then setting the handle on a table.

That being said, the annoying parts really only occur under 2500 rpm or so and is the worst at idle. It's PFM on the track and really changes the feel of the car.

Mine is a track/street/occasional DD. My 2 cents - if you can put up with a Stage II exhaust on a road trip, you'll have no problem with the 85A mounts.

I'll put up some notes from my install in the next few weeks (and how to combine the substiffy, gpan and racemounts install without killing yourself.)

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post #9 of 20 (permalink) Old 06-11-2011, 07:53 PM
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I have 85A on my 2-11 and there is loooooots of vibration in the lower RPMs .... But they work great .
I took some video of the engine during a track session and there is very little movement .
Gears are better .... sharper and everything is a little snappier.
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post #10 of 20 (permalink) Old 06-11-2011, 08:37 PM
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I had Manly inserts on for about three months before I got tired of re-adjusting my drooping dual-tip Larini due to the engine movement. I put on Sector's RACEmounts (85a) and I'll never go back. My Elise was purely a street car and I briefly had second thoughts (and I consider myself moderately hard-core) during the break-in period - if such a thing exists for mounts, IDK. But after a few hundred miles, they "mellowed" out to absolute driving perfection; vibration increased quite a bit - using the rear-view mirror at a standstill was useless and like peering through the eyes of someone room-spinningly intoxicated - shifts were smoother and sharper, throttle response was telepathic, exhaust sounded better, food tasted better, colors were brighter, my quality of life improved at least 25%. It's the way these cars should come from the factory, IMHO.

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post #11 of 20 (permalink) Old 06-12-2011, 05:07 AM
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I have the 75A mounts on my street/track Exige, I'm very happy with them. I haven't tried the 85A's, but based on these (and other) reports, I think they're a good compromise for a street and track car.

-Ed
'08 Arctic Silver Exige S240
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post #12 of 20 (permalink) Old 02-15-2012, 11:56 AM Thread Starter
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It's alive!!!

Does anyone have the 60a's on the side mounts and stiffer ones on the rear and front locations? I was thinking I may try the 85's front and rear, but leave the 60A's on the side..?


Can the poly-inserts be pressed out of the innovative mounts and be replaced with a different poly insert?
-Robert

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2008 Exige S240 ST
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post #13 of 20 (permalink) Old 02-15-2012, 08:34 PM
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Quote:
Originally Posted by sleepe View Post
It's alive!!!

Does anyone have the 60a's on the side mounts and stiffer ones on the rear and front locations? I was thinking I may try the 85's front and rear, but leave the 60A's on the side..?


Can the poly-inserts be pressed out of the innovative mounts and be replaced with a different poly insert?
-Robert
Innovative can press in different durometer inserts for you

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post #14 of 20 (permalink) Old 06-12-2012, 10:53 PM
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Quote:
Originally Posted by sleepe View Post
It's alive!!!

Does anyone have the 60a's on the side mounts and stiffer ones on the rear and front locations? I was thinking I may try the 85's front and rear, but leave the 60A's on the side..?


Can the poly-inserts be pressed out of the innovative mounts and be replaced with a different poly insert?
-Robert
Did you ever get around to testing this? I'm running 60A all the way around for about 3K miles so far and I don't mind the extra vibrations in exchange for the increase support. I was thinking of replacing just the front or rear only with an 85 to give that extra little support.

Which motion on the engine seems to give out more play; front or rearwards?
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post #15 of 20 (permalink) Old 04-11-2015, 05:27 PM Thread Starter
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update: Exige S240

**previous setup: stock side mounts, 85A rear mount, 60A front mount
-This was a great compromise between street and track. No vibrating panels at idle, or off idle... steering wheel didn't reverberate at idle or underway. Once moving any minor vibrations at idle ironed out as the rpms increased.

**current setup as of 5 days ago: stock side mounts, 85A rear, 85A front
- This has drastically increased the vibrations at idle, off idle, and when slogging through gears while keeping low revs... At higher rpms the vibration nearly vanishes but can still be felt distinctly through the wheel which some say (not me) can be distracting. It is too much for me to cope with and the 60A front mount will be making a reappearance very soon. Although shifting was quicker, more precise and smoother the tradeoff was not worth it for a 85% street driven Exige. (*note: this was not an all things equal comparison because a SSC subframe stiffener was installed at the same time the 85A mount was so this may have increased vibrations or made shifting feel more precise.....)

-In sum:
If you only drive on the street then get 60A front and rear only.
If you track/autoX a bit then get 85A rear and 60A front only.
If only track/auto-X then get 85A front and rear.

-Robert

2006 Elise ST (someone else has it now . . . )
2008 Exige S240 ST
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post #16 of 20 (permalink) Old 04-12-2015, 12:59 AM
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Thanks for the update!
I might go with the 85A/65A combo for my next usability/reliability mod. You're talking about actual mounts, and not 'inserts' right?

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post #17 of 20 (permalink) Old 04-12-2015, 05:08 AM Thread Starter
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yes, innovative mounts

2006 Elise ST (someone else has it now . . . )
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post #18 of 20 (permalink) Old 04-24-2015, 03:10 PM
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I have the Sector sport Inserts and don't want anything more than that, a huge improvement. The only con is that my nose becomes itchy when sitting at a light due to the vibration
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post #19 of 20 (permalink) Old 11-01-2015, 04:09 PM
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Quote:
Originally Posted by sleepe View Post
update: Exige S240

**previous setup: stock side mounts, 85A rear mount, 60A front mount
-This was a great compromise between street and track. No vibrating panels at idle, or off idle... steering wheel didn't reverberate at idle or underway. Once moving any minor vibrations at idle ironed out as the rpms increased.

**current setup as of 5 days ago: stock side mounts, 85A rear, 85A front
- This has drastically increased the vibrations at idle, off idle, and when slogging through gears while keeping low revs... At higher rpms the vibration nearly vanishes but can still be felt distinctly through the wheel which some say (not me) can be distracting. It is too much for me to cope with and the 60A front mount will be making a reappearance very soon. Although shifting was quicker, more precise and smoother the tradeoff was not worth it for a 85% street driven Exige. (*note: this was not an all things equal comparison because a SSC subframe stiffener was installed at the same time the 85A mount was so this may have increased vibrations or made shifting feel more precise.....)

-In sum:
If you only drive on the street then get 60A front and rear only.
If you track/autoX a bit then get 85A rear and 60A front only.
If only track/auto-X then get 85A front and rear.

-Robert

Reviving an old thread bcs I'm about to make this purchase. My car is weekend mountain roads and Autocross almost exclusively, will be making some track appearances in the near future. Therefore, was considering the 60A front/ 85A rear combo. But then I found there are 75A mounts too. : Decisions are hard. Maybe 75A front and rear is a better compromise? anyone tried those?

~Matt
'06 CO Elise
'07 Subaru Outback, DD beater
'16 VW GTI, Wifey's ride
Past toys: '02 WRX | '06 STI | '14 Subaru BRZ
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post #20 of 20 (permalink) Old 01-19-2016, 12:47 PM Thread Starter
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I would go as firm as you can handle in the rear.
BOE recommends leaving the front mount stock.
More vibrations emanate from the front mount than the
rear mainly because it is mounted directly to the AL tub
and closer of course.
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