Thanks for explaining and glad to hear you have it sorted.
Talc and Blu-Tac are often overlooked as useful workshop items
Hi all,
The Eaton M45 Supercharger on my MGB powered Locost is driven by a dual V-Belt, rather than the normal ribbed belt.
It was running fine but when I replaced the exhaust manifold recently, I noticed that the belts were worn and cracked.
I’ve fitted 2 replacements but they are screeching and slipping, no matter which way I adjust the tension.
The supercharger was loosened when I replaced the manifold as on the MGB engine, intake and exhaust are on the same side.
The belts are driven off the crank pulley and also drive the alternator, which is used to adjust belt tension.
Any suggestions on what to do next?
I'm pretty sure this is why superchargers are usually driven with a ribbed belt.
JC
Not an answer to your problem, but any reason why you used dual V belt and not a ribbed belt?
Could you change to a ribbed belt?
Hi Nick,
I didn’t build the car, but it was built as a test bed for a MGB race car. The crank and alternator just have additional standard pulleys fitted
whilst the supercharger has an additional twin v-pulley attached.
I’ll ask the guy who built it why he went that route!
Anyway, it seems that the answer was a combination of careful adjustment and a bit of talc….its now running perfectly as before - It seems there is a
pretty narrow band of tension where the belts work effectively!
JC
Thanks for explaining and glad to hear you have it sorted.
Talc and Blu-Tac are often overlooked as useful workshop items
quote:
Originally posted by JC
Hi Nick,
I didn’t build the car, but it was built as a test bed for a MGB race car. The crank and alternator just have additional standard pulleys fitted whilst the supercharger has an additional twin v-pulley attached.
I’ll ask the guy who built it why he went that route!
Anyway, it seems that the answer was a combination of careful adjustment and a bit of talc….its now running perfectly as before - It seems there is a pretty narrow band of tension where the belts work effectively!
I think talc just masks the slip.
Micro-v belts would be better as per the OEM drive on most cars.
Hi bi22le, I’ll put up some photos later so you can see the set up.
I think that the problem when it was too tight May have been that the tension was uneven - really tight across one run but less so on the other 2 and
perhaps the slip was as it sorted itself out.
I’m not sure whether the talc actually helped or not - it was one of the solutions employed whilst I fixed it. It may have just eased things and made
it easier, I’m not sure. It all disappeared pretty quickly though!
I also didn’t want it too tight as it runs the alternator, and I don’t want to knacker the bearings on that!
I think there is no doubt a ribbed belt would work better in most respects though.
Pics to follow later.
quote:
Originally posted by JC
Hi bi22le, I’ll put up some photos later so you can see the set up.
I think that the problem when it was too tight May have been that the tension was uneven - really tight across one run but less so on the other 2 and perhaps the slip was as it sorted itself out.
I’m not sure whether the talc actually helped or not - it was one of the solutions employed whilst I fixed it. It may have just eased things and made it easier, I’m not sure. It all disappeared pretty quickly though!
I also didn’t want it too tight as it runs the alternator, and I don’t want to knacker the bearings on that!
I think there is no doubt a ribbed belt would work better in most respects though.
Pics to follow later.
quote:
Originally posted by JC
I think that the problem when it was too tight May have been that the tension was uneven - really tight across one run but less so on the other 2 and perhaps the slip was as it sorted itself out.