MKI / MKII S type 240 340 & Daimler 1955 - 1967

generator or alternator

 
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Old 02-24-2019, 12:14 AM
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Default generator or alternator

The car came with a aftermarket a/c unit. It has a rinky-dink four blade pushing fan between the grill and the condenser coil. I'm wondering about the draw on the generator with the a/c and fan. I'd like to replace the stock fan and the add on a/c fan with a good (2500-3000 CFM), https://www.summitracing.com/parts/flx-168/overview/ ,pushing electric fan. This post had somethings to say about the abilities of the original generator:https://www.jaguarforums.com/forum/m...ersion-202117/


Any comments or help appreciated. - Stu
 

Last edited by jagstuart; 02-24-2019 at 12:18 AM.
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Old 02-24-2019, 02:03 AM
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That new fan takes almost 20A , so may well have an effect on the dynamo's ability to keep up, what Dynamo do you have fitted at present ? If you have been reading the Air Con thread and it's contents, you will have seen that there was a need to upgrade to a 60A alternator when there were issues with night driving with lights on and AC.

The biggest benefit of the Alternator over the Dynamo is that is gives a higher output at low revs.
 
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Old 02-24-2019, 04:42 AM
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Yes ~ the standard 30 amp dynamo & even the "uprated" 35 amp unit is unlikely to keep up with mod cons fitted to the vehicle.

There are a range of Dynalites that look original & are available with PAS pump offtake. Up to 60 amp IIRC.






PAS pump offtake






And not look alike but will accommodate PAS pump & output 65 amps.



 

Last edited by Glyn M Ruck; 02-24-2019 at 04:44 AM.
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Old 02-24-2019, 09:58 AM
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Who makes the last Alternator with the take off Glyn ?
 
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Old 02-24-2019, 10:56 AM
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Stu,

check with Retroair if you want to convert to alternator, he has one if your car has power steering and another alternator for S type without p/s.

Dynamo to Alternator Kits | RetroAir, Inc.
 
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Old 02-24-2019, 04:30 PM
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Originally Posted by TilleyJon View Post
Who makes the last Alternator with the take off Glyn ?
XK's Unlimited supply. Now owned by Moss. I would go Dynalite. Like the Retroair supplied unit the XK's unit requires conversion back to the single "V" belt. Really for early Mk2
 

Last edited by Glyn M Ruck; 02-24-2019 at 04:49 PM.
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