New Poly Engine Mounts

[afterburner]

What shore hardness are you using for the mounts? I'm doing some mounts of my own and the only poly I had was Shore 95A and... they feel like solid aluminum ones and that's with a 4cyl engine. At slightly above idle my steering wheel vibrates visibly...

[PRY4SNO]

Are these for sale to the public?

My 034 mounts are FUBAR after a mere 7500km, broke clear off at the tack welds!

[willg54]

Nearly 3000miles and going strong!


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[willg54]

thought i'd update what I've found on these although I haven't covered many miles in them yet.

At idle i reckon there's a bit more vibration but hardly noticeable and theres a few spots in the rpm range i've spotted during pulling away that vibrate a bit more, found some new rattles anyway

as for noise, i can't really comment, i dont notice anything new but I have a new exhaust which is probably covering up anything thats developed haha

I'll keep updating as i get some miles on them but so far they're great!

Thanks Kev!!

[Jamo]

Post 37, more increase in noise than vibration, there is some more than oem that is to be expected but after a week or so it becomes normal to you and you don't notice.

This is on a stroker setup which is heavier than the stock block so I'd imagine you'd get less feedback than myself.

[Error404]

feedback? how are they for vibration etc?

[Jamo]

haha santa belly inspired poly bush mounts

[bambridge]

Oh I see, yes

Jamo has tested these and seems happy with them, he has stated that the poly has bulged out slightly, but this will be due to the weight of the engine, and the poly when compressed can only go 1 way, outwards(bit like me after xmas)

I Have a batch going thro right now, but all of these have been promised to members who have contacted me in the last week or so
So will start another batch for stock/sales

Cheers

kev

[Jamo]

Oh I see, yes

[fridtjov-audirs2]

New in what way?

Are they ready for sale?

[Jamo]

New in what way?

[fridtjov-audirs2]

Something new about this????

[Error404]

Casting poly is a H&S nightmare Kev, Isocyanates are pretty unpleasant.
You're better off making the mould and getting a specialist to cast it, I know of a firm in Birmingham who might be able to help.

[Jamo]

With good help form Acidburn and Quattronutter finally managed to get the mounts changed over the poly versions.

1st impressions

1) At idle blipping the throttle no engine movement can be seen to the eye, with the OEM aircon engine mounts which were actually in A1 condition when remooved from the car, blipping the throttle showed significant engine movement
2) The car feels more "solid" like everything is more connected, the gearbox lever also does not move
3) No marked increase in vibration through the steering wheel or car body
4) There is an increase in noise into the cabin, this is to be expected however with more solid mounts
5) I need to bed them in and also see if I need to tweak the height adjustment. I installed them without drop down on the engine as a test. Using copper slip on the previously contact points there was no contact that could be seen.

So far so good

[bambridge]

As you can see from one of the photos, the poly is a PITA to machine, you have to freeze it solid before machining, even putting a chamfer in the bore was a pita coz the poly had gone back to room temp!!

Been thinking about making my own poly and using my own moulds, to keep costs down, if these become a regular job