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 Whine at 3500 rpm
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pruyter

Netherlands
323 Posts

Posted - 27 Oct 2013 :  12:58:00  Show Profile  Reply with Quote
Hi Stella,

Regarding the ampere meter I advice you to go fot the 18ACR (or a replacement) which produces 43A. When you buy also a Lucas 50/50 ampere meter you have a fit which works. I own such a Lucas ampere meter which I bought in the USA from the Californian Association of Tiger Owners some years ago. So they exist!
If you use the "WOSP LMA638" with the excisting ampere meter the instrument surely won't like it to put it mildly.
Regards,
Peter
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pruyter

Netherlands
323 Posts

Posted - 24 Oct 2013 :  12:50:39  Show Profile  Reply with Quote
Hi Stella,
up til now I have never heard about this alternator. But some googling learned me that this alternator produces 80 amps and CCW-Tools in England sells this one for 77,20 GBP including VAT. Posting should be something between 20 and 25 GBP.
Accu Spark in England sells a 18ACR for 39,95 GBP plus 20/25 GBP in posting.
I have no idea about the quality, but knowing that both companies have a solid reputation one should expect quality for the money. So if you can buy the same alternator cheaper in France I should not hesitate and buy it there.
It is possible that the size of the alternator is not the same as the one you have now which perhaps causes that you have to do something with the bracket. Also important is that you check out the size of the pulley.
Do not forget that your ampere meter doesn't cope with 80 amps!
Best regards,
Peter

Edited by - pruyter on 24 Oct 2013 14:23:55
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Stella

France
132 Posts

Posted - 24 Oct 2013 :  10:40:47  Show Profile  Reply with Quote
Hi Peter....

We have found available in France at reasonable cost "WOSP LMA638"

Buying Lucas from UK costs arms and legs.

What do you think of the WOSP
regards

Stella
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Stella

France
132 Posts

Posted - 23 Oct 2013 :  20:41:25  Show Profile  Reply with Quote
Hi Peter... thanks so much for the info...


regards

Stella
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pruyter

Netherlands
323 Posts

Posted - 23 Oct 2013 :  12:27:33  Show Profile  Reply with Quote
Hi Stella,

I am glad you found the culprit. I have thought about the fanbelt but usually it produces a terrible sound by accelerating when it has to much slack.
About your alternator: the Series 5 has a 10AC which has an output of 35A while the 11AC has 45A and the uprated 11AC has 60A.
But you should really go for a ACR alternator.
The 15ACR produces 28A, the 16ACR has 34A, the 17ACR has 36A, the 18ACR has 43A and finally the 20ACR produces 66A. That means that both the 18ACR and the 20ACR are the appropiate options.
Good luck with it!
Regards,
Peter
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Stella

France
132 Posts

Posted - 23 Oct 2013 :  04:58:32  Show Profile  Reply with Quote
Hi Peter

Seems someone on a previous life fitted a fan belt which was too small, thus forcing the alternator out of position. New fan belt now fitted and the alternator sitting comfortably where it should be.

We took the car out for a drive to test overheating problems and never noticed the whine... so perhaps that has been solved now.. fingers crossed. We will take the car out for a longer run to be really sure...

And now looks like we have to upgrade the alternator as the electric fans are using to much power !! have to get that sorted before the winter comes and we need the heater, lights and wipers as well...


stella

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pruyter

Netherlands
323 Posts

Posted - 26 Aug 2013 :  08:12:08  Show Profile  Reply with Quote
Hi Stella,
Do you have any news on investigating the whining of your Rapier?
I forgot to mention that if you should have ruled out the diff as the culprit you could continue with starting the engine followed by testing with both the fanbelt atached and taken off. Should the whining disappear after the fanbelt has been taken off you can be sure that either the alternator or the waterpump causes the whining.
Regards,
Peter
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Stella

France
132 Posts

Posted - 23 Jul 2013 :  12:58:27  Show Profile  Reply with Quote
Hi Peter.. many thanks for your prompt replies..

I am printing out your suggestions and will work my way through them over the next few days. Today, it is so hot here (45c) that we are staying indoors where it remains a cool 26c...

| will let you know how I get on...

kind regards

Stella
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pruyter

Netherlands
323 Posts

Posted - 23 Jul 2013 :  12:24:47  Show Profile  Reply with Quote
I have been thinking a little bit more: Is the noise there also when you are not driving the car but just spinning the engine up to 3500 tpm? If not you can rule out the engine. If the differential/propshaft is not the cause, which can be tested as described in my first reaction to your post, than it is likely the gearbox/overdrive.
Sometimes something simple like the bearing of the alternator causes a whining noise, so it doesn't need to be something terrible which causes this whining.
So just try to rule out some possible causes like resp. differential/propshaft, engine and gearbox/overdrive.
Regards,
Peter
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pruyter

Netherlands
323 Posts

Posted - 23 Jul 2013 :  07:35:18  Show Profile  Reply with Quote
Hi Stella,

try when you hear the wining the following: switch off the engine while engaging neutral in gear and listen if the wining disappears or not. If the wining is not disappearing there is a real chance that the differential is causing the trouble.
If the wining disappears then the engine/gearbox/overdrive is causing the problem. Maybe a bearing.....perhaps the pivot bearing?
It will not be easy to detect. Is there only a relation to the amount of revs or is there also a relation to the speed?
I will think a bit more of it and when I have some ideas I will come back to you.
Regards,
Peter
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Stella

France
132 Posts

Posted - 22 Jul 2013 :  21:32:47  Show Profile  Reply with Quote
Hi everyone

My Series V is running well, but there is an irritating whine which starts just below 3500 rpm., gains volume, then disappears.. as the revs increase to just above the 3500 .. immaterial which gear..

It's obvious I know nothing about engines etc.. so treat this enquiry gently please..

many thanks

Stella

Edited by - Stella on 22 Jul 2013 21:33:53
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