mushroom inserts

[squbti]

hi all, does anyone know if it would be ok to use ali mushrooms ?
cheers
Samy

[londonsean69]

Originally Posted by squbti

hi all, does anyone know if it would be ok to use ali mushrooms ?
cheers
Samy

No idea if it is OK, but mine are going to be Ally, when I get my lathe sorted.

I guess it also depends on what you are using for power, and how you are using it.

BEC vs Car engine
Road vs Track
etc.

Sean

[squbti]

yeh i think it should be ok too, i know there are some uprights made of ali so i cant think of any reason why ali mushrooms wont work .
Samy

[londonsean69]

MNR do theirs in HE30 ally (same as me), so no reason not to use ally.

Although I am sure someone will be along to tell us why not

As an aside, what are the 3GE inserts made from?

Sean

[Spikehaus]

Offset mushrooms are building an unstable pivot into the geometry. A grub screw may help any correct any movement for the IVA. I am yet to here of any calculations to backup this geometry. I have run this item past all the local precision engineers and yet to receive any feedback to the contrary.

I challenge some geometry based calculations or drawings to prove this? Ally is acceptable, but I recommend that that the stem is extended to fill the hub counter bore.

[londonsean69]

Spike, you've lost me there!!

I think that for the IVA they need a secondary fixing such as a bolt tapped into the mushroom, through the cast upright.

As far as calculations to back up the geometry, surely Ford 'must' have done some work on this. Although obviously the Ford upright is being used in a different situation.

And what item have you run past the local precision engineers?? The insert, the upright??

Also, what do you mean by "the stem is extended to fill the hub counter bore"??

Sean

[squbti]

hey guys , kinda lost me there too. anyone have a picture or drawing of how the inserts should look for them to sitt corectly in the uprights .how long should they be & whats the best way to fasten them ?
Samy