Hello,
I wish to buy an Alternator Pulley for a ' Double V ' belt
I have upgraded my Series 1 to Alternator .
Please advise,
Kind Regards,
Alternator Upgrade Pully
#2
It is known as a 'Duplex' pulley and SNGB sell them as part C24392 for the standard D11/AC alternator. It may not fit depending on the shaft diameter of your alternator though which could be 15mm or 17mm. What alternator are you fitting?
David Jones
S1 OTS OSB
1997 Porsche 911 Guards Red
2024 Lexus LBX
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S1 OTS OSB
1997 Porsche 911 Guards Red
2024 Lexus LBX
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#3
Hello,
Thank you, I already fitted the Duplex pulley from a dynamo but the output is not sufficient, so I guess the SNGB one should fit OK
Kind Regards,
Thank you, I already fitted the Duplex pulley from a dynamo but the output is not sufficient, so I guess the SNGB one should fit OK
Kind Regards,
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#4
The 11AC pulley is 2.5" diameter if I recall correctly. The alternator needs to be producing maximum voltage at reasonable engine rpm which is regarded as being about 2,000rpm for a road car. Therefore a pulley ratio of between 2:1 and 3:1 is normally specified.
David Jones
S1 OTS OSB
1997 Porsche 911 Guards Red
2024 Lexus LBX
Add your E-Type to our World Map: http://forum.etypeuk.com/viewtopic.php?f=1&t=1810
S1 OTS OSB
1997 Porsche 911 Guards Red
2024 Lexus LBX
Add your E-Type to our World Map: http://forum.etypeuk.com/viewtopic.php?f=1&t=1810
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ALAN COCHRANE
- Posts: 712
- Joined: Sun May 06, 2012 9:37 am
- Location: Fife
#5
Paul
Another option is to keep the original single V belt and fit a pulley of the right diameter from another scrap Lucas Alternator. This is what I did and in the process discovered that there are many Lucas alternators of the period with identical shaft sizes. This means you will have plenty to choose from.
In addition it's probably cheaper than buying the Duplex pulley.
Cheers
Alan
Another option is to keep the original single V belt and fit a pulley of the right diameter from another scrap Lucas Alternator. This is what I did and in the process discovered that there are many Lucas alternators of the period with identical shaft sizes. This means you will have plenty to choose from.
In addition it's probably cheaper than buying the Duplex pulley.
Cheers
Alan
Alan Cochrane
1961 S1 OTS,1968 Triumph TR250, 1971 Triumph GT6 Mk3, 2008 Porsche Boxster RS60 Spyder
1961 S1 OTS,1968 Triumph TR250, 1971 Triumph GT6 Mk3, 2008 Porsche Boxster RS60 Spyder
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