Hey people.. i been told about something called belt drives... apparently they just some huge cogs or sumfin and a thick belt that sounds like a supercharger or wotever?? not 100% sure but thats the names that i been told... anyone know anything about them or if they actually exist?? cheers

yeah GILMER drive...i dont think they have made em for a magna but u can measure em up and get em made

they have harsher teeth i think which cause the winding, bit stronger than ur average belt

yeah GILMER drive...i dont think they have made em for a magna but u can measure em up and get em made

they have harsher teeth i think which cause the winding, bit stronger than ur average belt
thats the name haha my bad.. so whats the diff then is it just the sound that makes a difference then?

as far as im aware it only gives a better grip (teeth not slipping off the belt) and the effects of having such a tuff belt made the whining sound

this is definately a characteristic of gilmer drive but im not sure what else you would use it for...maybe someone else can elaborate more

the sound alone would b good enough haha

as far as im aware it only gives a better grip (teeth not slipping off the belt) and the effects of having such a tuff belt made the whining sound

this is definately a characteristic of gilmer drive but im not sure what else you would use it for...maybe someone else can elaborate more

You use them in conjuction with your supercharger (in pretty much most cases)

I don't know why anyone would use one of these unless they had no choice. Bloody noisy things, there have been a few ****box geminis etc. around with them, (not supercharged - slower than an excel)... Why??? The noise gets a bit much after a while.

Make it sound like its supercharged when its not?

RICE

Almost as bad as a fake BOV.....or LEDs on your exhaust tip.....or placing an intercooler in ur front bar with piping that doesnt go anywhere...

Almost as bad as a fake BOV.....or LEDs on your exhaust tip.....or placing an intercooler in ur front bar with piping that doesnt go anywhere...
you mean i shouldn't do this mod? oops

Gilmer drives are for engines that rev above what they were designed too, they remove belt flex and twist and stop belts jumping clean off their pulleys. Every time my friend took his Xe 302 past about 6500 it would hop a belt and the charge light would come on, this went on for about two weeks before we fitted a Gilmer drive and never had the problem again :)

Matthius

Errr... Wouldn't it make more sense not to rev an engine higher than what it was designed for in the first place? :nuts:

Or use double belts? Thats what ribbed belts are for - Gilmers don't slip. It has nothing to do with jumping (thats a tension issue).

Belts not slipping are important for certain functions - a timing belt, for instance, is a gilmer belt. If it slipped, you would come to a very abrupt halt when your valves hit the top of your pistons.

They are also very useful for transferring a LOT of torque to a load but at the same time not requiring as much tension (to strain bearings etc). This is why the sprintex supercharger uses a standard *ribbed belt* but uses a small gilmer in the gearbox - they could have used a chain drive, but these are noisy and require lubrication, big gears would have been expensive (and required lubrication) and another V belt or ribbed belt would have required a LOT of tension - not too much room for a tensioner there, and not much flex in a belt that small, so large energy loss to friction. Obvious choice - a gilmer.

For a standard car - no point - rice. There isn't a factory supercharger fitted in a production car that uses a gilmer belt drive - why? They are as noisy as **** and if something jams/seizes (water pump/PS pump/alternator) they absolutely shred and flog the guts out of all of the other pulleys, wrap themselves around other bits etc. V balts and ribbed belts just smoke and squeal - you have time to stop before it becomes catastrophic.

Cheers
Heath Young

Errr... Wouldn't it make more sense not to rev an engine higher than what it was designed for in the first place? :nuts:



No it wouldn't, otherwise v8 supercars wouldn't exist, those pushrod 5l engines were designed to rev to about 5000rpm. I didn't mention once the motor should be stock. There is two ways to make a car more powerful - make it rev or feed it forced induction.

Matthius

Or use double belts? Thats what ribbed belts are for - Gilmers don't slip. It has nothing to do with jumping (thats a tension issue).

Belts not slipping are important for certain functions - a timing belt, for instance, is a gilmer belt. If it slipped, you would come to a very abrupt halt when your valves hit the top of your pistons.



Jumping can be a tension issue, it can also be a harmonics issue, once a belt is going way beyond what it was designed to do no matter what tension you put on it, it will start to flap back and forth and eventually jump. If you do your research instead of sprouting you'll find that nearly all american style v8's once revved over 7000 will hop belts off their pulleys and Gilmer drives will be required.

Matthius.

P.S Gilmer is a brand name.

you mean i shouldn't do this mod? oops
Haha no I was merely describing a VK dunnydore that lives near me...Saw him one night, and he "claimed" his car was turbo, and yet when asked why the piping went from air filter to throttle body, he said the turbo was in the "round pipe thing" which I assume he ment plenum, and as for intercooler piping going nowhere, he said "it goes somewhere, you just cant see it because its painted black".......