6 replies to this topic

[racingbob]

are those red poly subframe mountings ok
only spoke to some today at bealuie he put in
solid and cracked his floor

[tiger99]

Do you mean the front or rear subframe? Poly are perfectly ok at the rear, and if it cracked it was because the shell was rotten or inadequately repaired, but none of the available poly kits are designed correctly for the front, and some are unsafe.

 

As has been discussed here many times, if you fit solid mounts, it must be a full set or something will definitely crack. Never, ever mix solid and any kind of resilient mount on anything, not just Minis. It is usually the inner wings that crack, and that soon becomes serious.

 

If it was the floor in the toeboard area it is because the floor and subframe are not the same as the original solid mounted cars, and you really do need to weld a strengthening plate of 2mm steel maybe 4 or 5 inches square on the toeboard around each mount.

[racingbob]

Do you mean the front or rear subframe? Poly are perfectly ok at the rear, and if it cracked it was because the shell was rotten or inadequately repaired, but none of the available poly kits are designed correctly for the front, and some are unsafe.
 
As has been discussed here many times, if you fit solid mounts, it must be a full set or something will definitely crack. Never, ever mix solid and any kind of resilient mount on anything, not just Minis. It is usually the inner wings that crack, and that soon becomes serious.
 
If it was the floor in the toeboard area it is because the floor and subframe are not the same as the original solid mounted cars, and you really do need to weld a strengthening plate of 2mm steel maybe 4 or 5 inches square on the toeboard around each mount.

yes its for the front

so you saying red poly no good

[Fast Ivan]

The general consensus is that poly are no good, not fitted and tested myself but based on research.
This research also tells me that solid is the way to go but you must strengthen the toeboard or it will crack, as has happened to the chap you met

[Tupers]

The colour's irrelevant poly front subframe mounts are no good. Go solid with a spreader plate on the toe board or standard rubber but never poly. 

[Tupers]

Here are the plates I made for my estate before I plug and seam welded them on. Possibly a little over kill but they're strong as hell. 

[minisilverbullet]

A tad of topic.....but does the reinforcing plate need to be welded in? I just cut mine from pretty thick steel approx 3mm X 200mmx 200mm and bolted the captive studs through it .