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Spitfire6
May 18, 2017, 6:22pm Report to Moderator


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Hi,
I have a 6 cylinder crank-shaft pulley that fits a 9.5mm/10mm alternator belt just fine. The top of the belt sits top of the pulley and all force appears to be on the side of the belt.

My A127 alternator pulley appears to be gripping the belt much further into the pulley as it snapped this morning and the bottom is as shinny as a new penny. It seems the small pulley is for a 13mm belt.

Are all A127 alternators made for a 13mm belt or could it be my 75A one is made for a 13mm belt?
If I buy a lower amperage alternator the pulley will be for a 9.5mm belt?

I can change either pulley to suit. Do the CP/CR crank pulleys come in 9.5 and 13mm options? do the A127's come the same?

Confused,
Iain.


Me in Burnley, GB
Spitfire 6 EFI Alpha N (Emerald K3 ECU). Big fat 215/40/16's on the backside. (They fit and minimal camber change). Custom cooling system with 20% EG for winter with 2% corrosion inhibitor. LED's all round. NT 5W40 Oil. 3.27 diff with a LSD by Quaife. TR6 Transmission + J Type.

PUG 206CC 2L twin-Cam. NT 5W40 Oil
Automation and control systems engineer.
RIP Step-7 Classic. Long live Portal V14
IEEE Member
G6SBH
Yaesu FT 102 with all the extra's.

http://www.SpitFire6.UK               Main site- work in progress

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Nick Jones
May 18, 2017, 7:38pm Report to Moderator

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I suspect that the A127 will come with a variety of pulleys which will be vehicle specific rather than native to the A127 (which is used on many vehicles).  The trick will be finding the right donor vehicle.  You may even find you can swap the pulley from an old ACR series as they are all Lucas.  There is a fair bit of interchangeablity.

I run a big Bosch unit from a Mk6 escort and that comes with a poly-vee pulley.  However, the pulley from a small Bosch alternator used on Citroen Saxos bolts right up and suits the Triumph belt.

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012, 10CR2013, 10CR2015, HCR 2016 & HCR 2017.
GT6 Mk3 Roto - project in progress
Spitfire MKIV son's project now on the road as a daily driver
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
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Spitfire6
May 18, 2017, 8:27pm Report to Moderator


Posts: 1,089
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Hi Nick,
I wrongly assumed that all A127 V pulleys were the same. If you wanted a higher power unit you need the poly-vee belt.

So I need to ask the question next time I buy the A127 and get the biggest amperage for a reliable transfer over a 10mm belt. I have a 25mm2 cable from B+ to battery, so output amps are not a problem. I need the amps to charge my leisure battery quickly as I plan on installing a lot more loads before winter comes.

Thanks,
Iain.

PS. After belt snapped in Colne, I still managed to drive an extra 15 miles to work and fitted a new 10mm belt at lunch time. 12.1 v on battery and started first time.




Me in Burnley, GB
Spitfire 6 EFI Alpha N (Emerald K3 ECU). Big fat 215/40/16's on the backside. (They fit and minimal camber change). Custom cooling system with 20% EG for winter with 2% corrosion inhibitor. LED's all round. NT 5W40 Oil. 3.27 diff with a LSD by Quaife. TR6 Transmission + J Type.

PUG 206CC 2L twin-Cam. NT 5W40 Oil
Automation and control systems engineer.
RIP Step-7 Classic. Long live Portal V14
IEEE Member
G6SBH
Yaesu FT 102 with all the extra's.

http://www.SpitFire6.UK               Main site- work in progress

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Spitfire6
May 19, 2017, 9:31pm Report to Moderator


Posts: 1,089
Posts Per Day: 0.36
Hi,
Just purchased a 75A A127 online only 50 quid.
+ tax
+ delivery.
=
£65.40 GBP

Lets hope the pulleys line up. .

Cheers,
Iain.


Me in Burnley, GB
Spitfire 6 EFI Alpha N (Emerald K3 ECU). Big fat 215/40/16's on the backside. (They fit and minimal camber change). Custom cooling system with 20% EG for winter with 2% corrosion inhibitor. LED's all round. NT 5W40 Oil. 3.27 diff with a LSD by Quaife. TR6 Transmission + J Type.

PUG 206CC 2L twin-Cam. NT 5W40 Oil
Automation and control systems engineer.
RIP Step-7 Classic. Long live Portal V14
IEEE Member
G6SBH
Yaesu FT 102 with all the extra's.

http://www.SpitFire6.UK               Main site- work in progress

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