Pe

I have the isolation mount and a very good piece of kit it looks, but you have got me, what is the Assembly sleeve and wood screw for. pic below.

For those who do not know what it looks like I have posted a pic of an engine mounted to the standard mount, the pic on my bench is the mount with the ignition module support.

Mike

Hi Mike,
These are assembly tools that help to secure the assembly to the firewall when setting up the engine with the right thrust lines and cylinder angle. Once all drill hole positions are defined and drawn, you can put these in your tools box.

Ah the light dawns, so you just use these as a temporary fixture whilst you finalise the postition.

Thanks as always usefull information and quickly replied.

MIke

MY MVVS 58 instruction sheet came with instructions to never use an islation engine mount

calnev4bob

Thats strange as this is made by MVVS for the 58pro where in the instuctions does it say that, I can't find any reference to it in my supplied instructions.

Mike

Can you post a copy of that? I have some drawers, filled with very nice MVVS designed back mounts which have built up grommet-type vibe mounts.
These were designed for the 58cc!

Well since asking for a back up to the statement made by calnev4bob concerning MVVS the isolation mount its all gone quite, I wonder why?

Isolation mount and my 45 when I get it are going in a Edge 540T will post pics when I start the instalation.

Mike

I am going to use the MVVS isolation mount on my new Jamara 330L Extra, as I will have to build a new motor box, I can build it at any length, so my question is: is there an optimum length for the stand offs from the isolation mount to minimise vibration and noise?

Mike

The shorter the better. Ideally, the mounting isolators should be located right alongside the engine mass center, which is the vibration origin. This is hardly possible, so most modellers just use the existing engine pod, and make standoffs to suit the length to the end of the cowl.

Thanks Pe

Thats just what I thought I can bolt the spreaders against the rear mountings which will give me the shortest possible extension and I will just extend the motor box to suit.

Much better pic of you on your web site by the way.

Mike

My wife resented the scruffy look of the previous one, though I liked it. [sm=bananahead.gif]

Pe

I agree with your wife

Pic shows that its not possible to bolt the engine to the iso mount without spacers as the bulge at the back of the crankcase/cyclinder liner which I assume is a transfer port sticks out too far, nothing that a couple of washers will not cure, but it does mean the bolts supplied are not long enough.

Mike

There's two ways to mount them. Alongside the bulge, or across the bulge. One of the two ways won't fit, and the bolts will be too short

Pe

Yes you are quite correct, unfortunatly if you fit the cross beams vertically in relation to the engine you end up with the members in front of the exhast which could be a problem if the bend off the stub needs to be tight to accomadate a narrow cowl, should not be a problem on most installations with standard manifolds however.

Mike

Just thought I would show the instalation of the ISO mount on my Edge, you can see the thrust washers on the right hand side and the ingnition bracket on the left.

Mike

Looks good Mike, Rear mounts are so easy to get the thrust lines ok.
I wonder how you gonna fit that Yak in there.

Pe

If you look closly you can see the tail of the Yak in the foreground hanging from the ceiling, its a little crowded but I cope.

Mike

Couple of pics showing the ISO mount and new motor box constructed for installation in my new Extra, this will hopefully reduce noise even more.

Mike




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Things are shaping up well. The header length is right with the canister as much as possible in forward position, and the teflon coupler fitted right after the last pipe bend.