Need Special Cam Belt
Discussion
Need advice please. I'm converting an MGRover KV6 to run two cam pulleys on each bank on the front of the engine (rather than the inlet on the front driven off the crank and the exhaust driven off the rear of the inlet cam by another short belt).
I've got everything worked out apart from where to get a belt that will fit. I've trawled the Gates catalogue but it doesn't tell you the tooth pitch and type, just the length and width.
Anyone got any ideas of where I can get a belt (or a belt made up)?
I've got everything worked out apart from where to get a belt that will fit. I've trawled the Gates catalogue but it doesn't tell you the tooth pitch and type, just the length and width.
Anyone got any ideas of where I can get a belt (or a belt made up)?
AFAIK there are only two main tooth profiles. The standard duty one is fairly square edged with shallow teeth and there's a comparitively rare heavy duty one for engines with high valve spring loadings such as the Ford CVH which has a deeper toothed rounded profile. Both have a standard pitch of 3/8" though.
Chances are if you can find one with the right number of teeth it'll be standard duty and fit your pulleys. If not you'd be better advised to find or make the pulleys to fit the belt than the other way round. No one's going to make a one off belt in a non standard length for anything less than megabucks.
Dave Baker
Puma Race Engines
Chances are if you can find one with the right number of teeth it'll be standard duty and fit your pulleys. If not you'd be better advised to find or make the pulleys to fit the belt than the other way round. No one's going to make a one off belt in a non standard length for anything less than megabucks.
Dave Baker
Puma Race Engines
OK a question, I'm Looking to convert my Lotus 2,2 to vernier pulleys and for cost reasons I'd like to use Proton Pulleys, assume I can sort out the machining, and get a belt the right length and tooth profile to fit the new pulleys. So, why does the number of teeth on the belt come into the equation? Surly if the cam and crank pulleys are a matched set, then each movement of a arc of two teeth on the crank pulley will give me a one tooth arc at the cam and I’m OK, regardless of the number of teeth in the belt.
Berw said:
OK a question, I'm Looking to convert my Lotus 2,2 to vernier pulleys and for cost reasons I'd like to use Proton Pulleys, assume I can sort out the machining, and get a belt the right length and tooth profile to fit the new pulleys. So, why does the number of teeth on the belt come into the equation? Surly if the cam and crank pulleys are a matched set, then each movement of a arc of two teeth on the crank pulley will give me a one tooth arc at the cam and I’m OK, regardless of the number of teeth in the belt.
The number of teeth comes into the equation as it determines the length of the belt as is the usual method of identifying one.thong said:
You didn't spot its the same person 
BB-Q Said
The number of teeth comes into the equation as it determines the length of the belt as is the usual method of identifying one.
That my question the Lotus engine has a peculier number of teeh (137 from memory), and cost a fortune, so if I change the pullies to say the Proton Pullies then I think, I can change the belt to any belt that fits the pulley profile and is the right length. I don't need 137 teeth any more.
But my local part supplir has this fixation I will still need 137, so am I right or him?
I think I have a fair leeway in length as I have manual belt adjustment, and I can fabricate a new mount if I need, I've found an old set of pullies in the shed, so next step is to take them with me to the shop, and try and find the nearest thing I can get machiend to fit. My thoughts are Proton as vernieer pullies for a proton are only 8 pound a set.
Fish981 said:
stevieturbo said:
he's an idiot.
teeth number only relates to belt length.
As long as the belt is installed correctly, and not too loose or toot tight, number of teeth is irrelevant.
Which is completely true but you wont have a lot of leeway in length due to tensioning issues.teeth number only relates to belt length.
As long as the belt is installed correctly, and not too loose or toot tight, number of teeth is irrelevant.
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