Rosco86
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| posted on 13/4/15 at 07:05 PM |
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2 piece prop
Looking into getting myself a prop shaft ordered soon, I've done a few searches but can't really find much, me engine is a bit high up and
not sure where's best for my centre bearing to help the angles out best, does anyone have any pictures of any 2 piece props in a BEC?
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twybrow
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| posted on 13/4/15 at 07:39 PM |
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You need the mating flanges to be as parallel as possible, and the prop itself should not be dead straight. You should be between 1-7 degrees from
straight, but no more if you want your prop to last.
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CosKev3
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| posted on 13/4/15 at 07:50 PM |
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Easiest thing to do is get the prop, then work out where to mount centre bearing.
Mac1 and older MK indys mount them parallel across the tunnel, the newer MK indy R's have them mounted vertically on the drivers side of tunnel.
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CosKev3
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| posted on 13/4/15 at 07:52 PM |
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Description
I added the 'bridge' above onto my chassis as I'm converting from car engine to bike engine.
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Rosco86
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| posted on 13/4/15 at 08:38 PM |
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Yeah I've read about the flanges being parallel but most cars I looked at seem to ignore that rule!
It's not so much the side position of the centre bearing but front to back position and behind or In front of the centre uj
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DIY Si
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| posted on 13/4/15 at 09:30 PM |
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Getting the flanges parallel is the easy bit, but bear in mind they're unlikely to be inline. Otherwise, I'd put the centre bearing
support where makes the most practical sense which I would suggest is about half way along, with the front UJ infront of the bearing. That is how my
Indy was built, as it gives a nice straight, supported bit in the tunnel and the angled bit free to move about when you need it to when fitting the
engine. I'd post a photo of mine, but I don't have one.
One other consideration is the option of a TRT section. I needed a new prop for my car, and went for it as it wasn't much more. The difference
in driveline shunt was amazing, and I would suggest it's well worth it as bikes usually have a cushion drive in the rear hub which we
don't tend to replicate at all in 7s.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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mark chandler
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| posted on 13/4/15 at 10:02 PM |
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My engine loosely follows the chassis frame so is quite crooked in the frame to allow decent pedal room, I suggest you first source your exhaust then
locate the engine with at least the manifold in place or you will end up chasing down bespoke parts.
Regards Mark
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tyrrell
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| posted on 14/4/15 at 10:27 AM |
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prop
I have a prop for sale it measures 1870mm end-end and has 2 central bearing, any good?
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tyrrell
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| posted on 14/4/15 at 10:54 AM |
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[URL=http://s81.photobucket.com/user/liamt_2006/media/IMG_4066.jpg.html] [/URL
]
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Rosco86
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| posted on 14/4/15 at 09:14 PM |
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Engine and exhaust is already done, I've been speaking to dunning and Fairbank and I think I've sorted it, I just wanted to see a picture
of a few installs to see how they ran
Cheers but that props a bit long!
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