2.0l Pinto Alternator

[Guest kevS7]

Hi Guys,

Need some advice, Alternator on my S7 collapsed last year on way to Le Mans. Usual story, French recovery unable to fix. So had car re-patriated to local garage. Local garage replaced alternator and set up with new belt and brackets. First trip out this year,belt slipping. Moving alternator on adjustment bracket does not alter distance, so no more tension available.Any advice welcome Thanks Kev.

[Shaft]

Bigger Dia pulley, or shorter belt.

It could also be that if the Vee of the belt is narrower than your original.

This would affect it as the belt will sit down further in the pulley, giving

the same effect as a smaller wheel.

 

HTH,

 

Nick

[Guest kevS7]

Bigger Dia pulley, or shorter belt.

It could also be that if the Vee of the belt is narrower than your original.

This would affect it as the belt will sit down further in the pulley, giving

the same effect as a smaller wheel.

 

HTH,

 

Nick

[Thanks Nick, will look into the pulley sizes./quote]

[Longboarder]

Belt is always going to stretch and if alternator is not adjustable you would need a range of pulleys to keep adjusting to take up the slack. This introduces speed changes in the alternator and difficulties getting the belt on and off.

VW on old aircooled engines used to have a shim system in their pulleys to vary the V depth and thus give a variable radius pulley which worked well.

You really need to look at the system, define the problem which is a non adjustable bracket and make the bracket adjustable.

 

Nigel

[Guest kevS7]

Belt is always going to stretch and if alternator is not adjustable you would need a range of pulleys to keep adjusting to take up the slack. This introduces speed changes in the alternator and difficulties getting the belt on and off.

VW on old aircooled engines used to have a shim system in their pulleys to vary the V depth and thus give a variable radius pulley which worked well.

You really need to look at the system, define the problem which is a non adjustable bracket and make the bracket adjustable.

 

Nigel

[Thanks for all advice. I am making a new bottom bracket for the alternator which lowers the centre of the alternator pulley thus allowing for adjustment via the top bracket. /quote]