• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)

BN1/BN2 Alternator Conversion


Jedi Knight
Country flag
Alt.jpgI have finally gotten around to installing an alternator in my BN2. I am loath to install something like this if it uses an alternator that I would not be able to get within a day from any auto parts store I might coast into.
It also is much easier if it is a small diameter unit. This one is 65AMPs and it is a 3 wire installation so the charging light also operates as normal.

This is an Auto Zone cross referenced alternator that is the replacement part for an 1987 Suzuki Samurai. Nippon Denso was the OEM but this is the Auto Zone equivalent. I did have to order a custom pulley to accommodate the wide belt and I use a cogged Napa Auto Parts belt that is available anywhere. I had to trim a support for the alternator that came from something else (it was lying around my shop for years and when the support for the generator I removed was the wrong shape I remembered I had it. Despite what my wife says, you absolutely have to keep stuff like that). The pulley obviously has to be kept if I ever have to replace the alternator.

Although I purchased a Dennis Welch 4 cylinder mount bracket that is designed for a Lucas alternator, I found it worked much better if I used the original bracket. I only had to hog out a small portion of the lip to allow the alternator to adjust downward a bit more to tension the belt properly. You can see it if you zoom in on the photo. The alignment for the belt was perfect. Hard to believe but so. Last, I am shamed to say I can no longer boast that I have nothing that falls into the "electronic" category in the car. I installed a small digital volt meter to keep an eye on things. One long trip so far and I am pleased.


Country flag
Excellent setup, Jon - very clean!

I see you can get one of these new on RockAuto for $83!

Can you show a picture of your adjuster strut?

I used a different Denso alternator in combo with the Hendrix GM alternator kit. With the Hendrix kit you get adjuster plates which will accept the very common GM alternator. I'm not worried about the alt going out, though.


Jedi Hopeful
I also changed to an alternator, this is my set up. I'm not happy with it, it works ok and I've had it on for several years but it's a little noisy. I've had it rebuilt with new bearings but it didn't make much of a difference. Thinking of copying your set up or the one Steveg has. I have the original wide pulley and belt fitted.
Country flag
I have a Leece-Neville 75 amp alternator which has two nice features: It has an external regulator that can easily be replaced without removing, much less disassembling the unit, and it came with a two-piece pulley which I shimmed with washers to accept the wide belt used on 100's.

I mounted it using a DW bracket. The unit has been on the car for about 10 years and has never given me any trouble.


Country flag
Dynamator 45amp alternator on Peter Roses' BN6:

The seller in Canada informs us a BJ8 model is due out this November.
BP Northwest sells the smaller sprite model - they may be able to get the larger big Healey models. Cost around $225 - $250.


Country flag
Last edited:
Similar threads
Thread starter Title Forum Replies Date
G BN1/BN2 Sidescreens Austin Healey 0
J 100 bn1/bn2 id Austin Healey 26
D Wanted BN1 or BN2 Donor/Parts Car Austin Healey Classifieds 1
Jake For Sale FS: BN1/BN2 Kilmartin Chassis Repair Parts, New Austin Healey Classifieds 2
K Wanted W.T.B. Late 100 BN1-BN2 DOOR HINGE Austin Healey Classifieds 0
F BN1 vs Bn2 gear box Austin Healey 23
W BN1 vs. BN2 rear brake lines / pipes Austin Healey 4
A Sidecurtains for BN1 OR BN2 Austin Healey 1
T BN1 / BN2 Top Installation Austin Healey 3
R BN1 & BN2 Engine # Plate Finish Austin Healey 25
F BN1/BN2 Clutch linkage Austin Healey 4
Vineyarder BN1 BN2 Transmission Question, Returning member Austin Healey 0
F BN1 or BN2 for sale in Europe? Austin Healey 3
ShawnC_at_Moss BN1, BN2 Carb Bodies with shafts Austin Healey 0
bighealeysource Anyone ever mount a side exhaust on a BN1 or BN2 Austin Healey 16
T BN1 / BN2 Horns Austin Healey 2
Frankenhealey BN1 or BN2 Hood? Austin Healey 3
W Rear axle oil seals for BN1 or BN2 Austin Healey 0
T BN1 3 Speed to BN2 4 Speed Austin Healey 15
timbn2 are these from a BN1/BN2 by chance...? Austin Healey 20
AH100M BN1 and BN2 two-tone Austin Healey 2
roscoe BN1/BN2 windshield Austin Healey 1
1 100-4 BN1/BN2 Drivetrain wanted Austin Healey 0
P BN1 / BN2 with a serious identity problem Austin Healey 1
A bn1-bn2 recognition Austin Healey 9
jtb55 Conversion of front brakes from BN1 to Bn2 Austin Healey 9
I Austin-Healey BN1 Parts List Austin Healey 4
BoyRacer BN4 Front Wings on a BN1 Austin Healey 9
BoyRacer Engine Swap: 3000 Engine Into a BN1 Austin Healey 22
BoyRacer Replace BN1 steering box with later version? Austin Healey 0
red57 Interesting BN1 for sale in Bellingham, WA Austin Healey 4
D BN1 Parts to Trade Austin Healey Classifieds 0
S WANTED: Healey BN1 "Smiths" Fuel Gauge (Dead or Alive) Austin Healey Classifieds 3
A BN1 Mechanical Brake Switch Austin Healey 23
P Wanted BN1 can shaft Austin Healey Classifieds 0
C BN1 Clutch Pedal Rattle Austin Healey 2
CharlesBN1 Uprated or 'umbrella' valve stem oil seals for BN1 Austin Healey 2
M BN1 Loss of Power Austin Healey 21
L Seat position for a BN1 Austin Healey 0
CharlesBN1 Wanted WTB Shelley Jack [6 INCH DL] for Early BN1 Austin Healey Classifieds 0
M BN1 with H6 carbs : what setting ? Austin Healey 56
I Ball Bearing cup for old style BN1 steering box Austin Healey 0
M Heat-related carb issue on BN1 Austin Healey 7
RCarr 1954 BN1 Wiper Wheelbox and Rack Austin Healey 3
CharlesBN1 Wanted wanted to buy - sidescreen trim/strips for early BN1 Austin Healey Classifieds 5
CharlesBN1 BN1 Soft Top installation - need advice! Austin Healey 3
Michael Oritt Optimal lighting for a BN1 Austin Healey 5
D Wanted BN1 LH Seat Cushion [Bottom] Austin Healey Classifieds 0
HealeyRick Wilwood Discs on a BN1 Austin Healey 1
CharlesBN1 need some advice fitting the bonnet on a 54 BN1 Austin Healey 4

Similar threads