Alternator pulley

[dman4486 5,000+ posts]

ok....I spoke to a manufacturer of this belt. they state that the next size down belt is around 44 inches which will not work on this application. stock is a 47.1 inch belt. the one available at the autoparts store is a 47 inch belt. how old is the belt on it now? and how much smaller is the new pulley? what are their diameters?

and for those that are questioning the larger pulley, do the math on the ratio and then make a decision of whether it will work or not.

 

[yikes vR 10+ year member]

Will not work with the bigger stock pulley. Smaller belt is what you need.

I had this same problem afew days ago, bigger pulley sunk my voltage so low at idle...

Slightly shorter belt was tuff to find but, fixed my problem.

 

[Yellow20thAEGti 10+ year member]

ok....I spoke to a manufacturer of this belt. they state that the next size down belt is around 44 inches which will not work on this application. stock is a 47.1 inch belt. the one available at the autoparts store is a 47 inch belt. how old is the belt on it now? and how much smaller is the new pulley? what are their diameters?
and for those that are questioning the larger pulley, do the math on the ratio and then make a decision of whether it will work or not.

Well the new pulley is about 1/3 to 1/2 smaller. The current belt is the one that came with the car from the factory. I spoke with Dave at DC Power and he gave me Napa's part number for the correct belt size, but the guy at Napa could not pull it up. I have no choice but to put the stock pulley on the new alt because the stock is fried.

 

[Pioneer~Saturn 5,000+ posts]

I garuntee some metal-working dude could fab up a mount for an idler pulley to put near your alternator and the problem would be solved and you'll get better belt wrap from it.

 

[Yellow20thAEGti 10+ year member]

I garuntee some metal-working dude could fab up a mount for an idler pulley to put near your alternator and the problem would be solved and you'll get better belt wrap from it.

I wish someone with a VW who has upgraded to a HO alt would chime in.

 

[treadburner 10+ year member]

what about 1/2 inch steel bracket under the alt?

 

[Yellow20thAEGti 10+ year member]

what about 1/2 inch steel bracket under the alt?

You mean to move it forward to add tension? I think it would hit my intake manifold.

 

[Pioneer~Saturn 5,000+ posts]

I wish someone with a VW who has upgraded to a HO alt would chime in.

I wish someone with a Saturn would've chimed in for my dual-alt's...but you just have to think things through and get creative, im FAR from a mechanic but can pretty easily think through the belt system of the car and see mounting points that could be used for an idler pulley or something of the sort to make your current belt work (or get a slightly longer belt so you can alter the path more with an idler pulley so you get more belt wrap)...you get the idea, there's someone near you that could get it done and fix the problem //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif...you just have to make it work //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

 

[Yellow20thAEGti 10+ year member]

I wish someone with a Saturn would've chimed in for my dual-alt's...but you just have to think things through and get creative, im FAR from a mechanic but can pretty easily think through the belt system of the car and see mounting points that could be used for an idler pulley or something of the sort to make your current belt work (or get a slightly longer belt so you can alter the path more with an idler pulley so you get more belt wrap)...you get the idea, there's someone near you that could get it done and fix the problem //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif...you just have to make it work //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

Well I am sure. I am just more concerned about being able to drive since I am carless. Anyway for now I will use stock pulley. I am not running any system at the moment and by the time I do decide to put it in(next week) this problem will be solved.

Once again I appreciate all the input.

 

[Pioneer~Saturn 5,000+ posts]

I see //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif didnt realize you didnt really need the output right now

 

[audioarsonal 10+ year member]

The pulley that comes on most HO alts is 2".Going to a stock pulley will more then likly make your alt have NO output at idle.Meaning everytime you come to a stop or idle your voltage will fall to 12v or lower.

Hope you can get things working.

 

[jdawg 5,000+ posts]

put a bigger pulley on the tensioner

 

[Sarthos 10+ year member]

Either a bigger pulley on the tensioner, an extra tensioner, or a bigger crankshaft pulley. A bigger alternator pulley will make your car like mine and drop to 12v at idle.

 

[Yellow20thAEGti 10+ year member]

Either a bigger pulley on the tensioner, an extra tensioner, or a bigger crankshaft pulley. A bigger alternator pulley will make your car like mine and drop to 12v at idle.

Actually my car is sitting at 14.7v at idle with stock pulley. Also, I think I found a belt. Dave at DC Power hooked me up with a supplier.

 

[Sarthos 10+ year member]

The belt must not be very loose then //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif