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Custom Alt Pulley

scutter - 3/8/14 at 11:02 PM

Folks, I'm trying to use the standard Alt mounting bracket on the Alfa V6 with a little Denso Alternator.

Mounted

I need the collective thoughts on the material to make an extended pulley out of? I need to bring the grooved surface 35mm forward of it's current position. Sorry for the poor drawing, I really can't do CAD!

Bad drawing

Steel, Alloy, titanium?

Also do we know of anyone who could make such an item?

Kind Regards Dan.

The Black Flash - 3/8/14 at 11:16 PM

I've got almost exactly the same setup on mine, but I made a new alternator bracket to bring the alternator forwards. It seemed easier that way. It also meant I could fine-tune the alternator's position by shimming it forwards with washers, though I only needed one in the end.

Could you do similar by mounting the alternator on the front of your bracket and adding a spacer?

I'd have thought that extending the pulley is going to increase the side load on the bearings, don't know if that would be a problem or not.

Paul Turner - 4/8/14 at 08:10 AM

Same here. Modified bracket to mount the small Denso on a Zetec. Much simpler (and cheaper).

Trollyjack - 4/8/14 at 08:39 AM

Would go with modifying the bracket.
Extending the the pully will put too much strain on the front & rear bearings.

mcerd1 - 4/8/14 at 10:30 AM

quote:
Originally posted by Trollyjack
Extending the the pully will put too much strain on the front & rear bearings.

^^ that's what I'd be worried about too

better all round with an extended bracket

FuryRebuild - 4/8/14 at 10:31 AM

I love the fact that you're using a turn-buckle to adjust alternator tension. I saw this done on a racing mini recently and loved the simplicity of it. NTS, I'll be doing that.

The Black Flash - 4/8/14 at 10:42 PM

quote:
Originally posted by FuryRebuild
I love the fact that you're using a turn-buckle to adjust alternator tension. I saw this done on a racing mini recently and loved the simplicity of it. NTS, I'll be doing that.

Not sure if that was aimed at Scutter or myself as we both seem to have done the same!
I couldn't find one short enough IIRC, but it was easy enough to make. Bit of hex bar, a RH tap and a LH tap to thread the holes in the end, and two rod ends (one left hand, one right - with locknuts).

I think there might have been some advertised in the back of CCC this month as well...

blakep82 - 4/8/14 at 11:05 PM

A 35mm spacer on the alternator bracket would be easier wouldn't it? Its the way I'd go

Turnbuckles and rod ends can be bought cheap from mcgill motorsports for only a few quid
http://www.mcgillmotorsport.com/advanced_search_result.php?keywords=turnbuckle&inc_subcat=1&x=31&y=17

Description

[Edited on 4/8/14 by blakep82]

FuryRebuild - 5/8/14 at 12:06 AM

McGills all the way. Great bunch.

quote:
Originally posted by blakep82
A 35mm spacer on the alternator bracket would be easier wouldn't it? Its the way I'd go

Turnbuckles and rod ends can be bought cheap from mcgill motorsports for only a few quid
http://www.mcgillmotorsport.com/advanced_search_result.php?keywords=turnbuckle&inc_subcat=1&x=31&y=17

Description

[Edited on 4/8/14 by blakep82]