dern
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| posted on 15/2/05 at 10:36 PM |
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I've been out in the garage having a think and for the right hand side I was thinking along the lines of this...
The bar is inch box. The mounts to the engine are 3mm plate welded to the bar. The end mounts are 3mm plate welding to the chassis and then bolted to
the bar. The hole in the bar ends will have a bit of tube welded in to stop any possibility or crushing or the hole being worn larger.
My thinking is that that would be lighter than having tubes running everywhere, not intrude on the space where the steering column would go so I
wouldn't have to worry about clashes and also be removeable so the engine can be easily removed. It would resist the engine twisting about the
z-axis and from shifting from side to side and backwards and forwards.
I haven't really thought about the mounts of the other side of the engine.
Please feel free to point out the flaws 
Thanks,
Mark
[Edited on 15/2/05 by dern]
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Coose
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| posted on 18/2/05 at 09:52 AM |
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Chris - yep, that's a luvly set of 41FCR flatslides you can see there, but as far as I know the motor is stock.....
It'll be running on stock (TTS jet-kitted) carbs at first, then the flatslides may just get lobbed on! 
I did a deal with a sidecar racer for one of his spare engines and the carbs were part of the bartering process!
Spin 'er off Well...
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ChrisGamlin
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| posted on 18/2/05 at 11:07 AM |
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Nice! Wish me luck with my nice complicated throttle bodies!
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Coose
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| posted on 18/2/05 at 12:12 PM |
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Ahhh, you'll be right! Just make sure you use the R1 fuel pump to keep things simple, and get yerself a Power Commander or similar. It makes
life sooooo simple when you can download whatever program you need from their website and then off you go! 
Spin 'er off Well...
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ChrisGamlin
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| posted on 18/2/05 at 12:24 PM |
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Yup, got myself a Power Commander PCIIIr today (the one that does ignition and fuelling), and hopefully in the process of getting a pump. Will then
run a low pressure pump up to a big swirl pot with the bike pump submerged in it, that way I don't need to mod my existing tank as its got a
return feed already.
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ChrisGamlin
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| posted on 18/2/05 at 01:12 PM |
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You may want to look at making up a cradle something like this
 
Alternative Cradle Design
I hope Wadders doesnt mind me nicking and editing his picture, it was the first BEC engine from above I could find
A diagonal X frame is how Westfield do it in their BECs, I think its a good design as the X bracing will add some more strength to the chassis
compared to a ST type cradle or individual mounts.
Chris
[Edited on 18/2/05 by ChrisGamlin]
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chrisf
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| posted on 18/2/05 at 02:03 PM |
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I did mine exactly like Chris just showed. Mine is hard mounted in the corners for extra bracing but rubber mounted on the engine. I made mine out of
3/4" square. It seems really sturdy but is something I will keep my eye one.
Pics are on my website.
--Chris
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ChrisGamlin
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| posted on 18/2/05 at 02:39 PM |
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I think the Westie one is only 3/4" round tube so yours should be fine too.
Some trick rear dampers youve got there
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dern
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| posted on 25/2/05 at 09:22 AM |
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I've been moving along on this making up some brackets and so on but on the gearbox side are two mounts where the back of the engine fits into
the frame. I've used to top mount but not (so far) the bottom one. I'm pretty happy that the engine will be firmly located without the
bottom mount but wondered if, by not using it, I'd be putting the engine under undue stress.
Does everyone else use both top and bottom mounts on the gearbox side?
Thanks,
Mark
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ChrisGamlin
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| posted on 25/2/05 at 09:32 AM |
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I never had bottom mounts on my blade but then the ST frame is quite chunkily built and holds the engine OK. Im going to build an X frame like above
for the R1 which won't be as solid so I will put on bottom mounts too
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dern
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| posted on 25/2/05 at 09:40 AM |
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quote:
Originally posted by ChrisGamlin
I never had bottom mounts on my blade but then the ST frame is quite chunkily built and holds the engine OK. Im going to build an X frame like above
for the R1 which won't be as solid so I will put on bottom mounts too
It certainly doesn't look as though the engine requires it
in order to to distort/twist (not in the chassis but as a unit) and I believe that the engine acts as effectively part of the chassis in a bike. I
think I'll do the mounts as I'm planning (without the lower mounts) and see how I feel when I'm done.
Cheers,
Mark
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ChrisGamlin
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| posted on 25/2/05 at 10:10 AM |
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Yup, you dont need it to protect the engine at all, just to stop it moving in the chassis when under load, trying to twist the frame. Basically if you
can make your frame strong enough whilst keeping it light then there's no reason to use em.
[Edited on 25/2/05 by ChrisGamlin]
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