3000s alternator
3000s alternator
Author
Discussion

Christian3000s

Original Poster:

36 posts

184 months

Wednesday 8th December 2010
quotequote all
Hi guys,

the alternator on my 79 3000s seems to be tired : low voltage at idle, when main beam is on...

Looked at the part, it appears this is an exchange items : no brand or ref mentioned on the body. Does any one knows the Lucas refs of the original/correct part to be used on my car?

Thanks for your help !

Chris

nwarner

612 posts

277 months

Wednesday 8th December 2010
quotequote all
The alternator on my 3000S is a 23ACR (or LRA279) 35amp. You can upgrade to a type LRA374 which is a 55 Amp. I did this on my Scimitar 2 years ago and they were available at my local motor factors and even at Halfords.

Nige

62GRANTIII

199 posts

210 months

Wednesday 8th December 2010
quotequote all
I would strongly advise fitting equivalent Bosch alternator
I have one on my 'S' and on 3 previous pre 80 TVR's.
They have bearings with rubber shields on, so much longer life.
Also the brush box/reg pack attaches externally, with 2 off 4mm screws.
It can be quickly replaced, & a spare can be carried in glove box at £15.
Lucas jobby is a soldering job
I pay about £55 for Bosch unit 55A from memory, in a 'proper old S' with no back window, you could get away with lower output
Cheers Ian B.

Christian3000s

Original Poster:

36 posts

184 months

Wednesday 8th December 2010
quotequote all
thanks! Ian, may I ask you the exact ref of your Bosh 55 A unit?
PS/ Your wheels looks impressive! What size are they (and tyres too)? No mods needed on body/suspensions to cope with these huge alloys?

Adrian@

4,420 posts

299 months

Thursday 9th December 2010
quotequote all
OE on the 3000S is the Lucas 17ACR and the easy upgrade would be the 18ACR (given that the Bosch is going to be a outright purchase with no exchange)it should cost pennies more to do...as Ian says with no rear screen to pull the power out...I would be checking the earths and wiring with a infrared temp unit for resistance issues first. Adrian@

heightswitch

6,322 posts

267 months

Friday 10th December 2010
quotequote all
Adrian@ said:
OE on the 3000S is the Lucas 17ACR and the easy upgrade would be the 18ACR (given that the Bosch is going to be a outright purchase with no exchange)it should cost pennies more to do...as Ian says with no rear screen to pull the power out...I would be checking the earths and wiring with a infrared temp unit for resistance issues first. Adrian@
I thought ian was referring to the additional power required due to the frictional drag caused by the disrupted air flow, he almost had me removing the rear screen of my car theregetmecoat

N