• 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)

'58 XK150 Dynalite Alternator swap question


Freshman Member
This XK150 is set up negative ground, as is the Dynalite Alternator. It uses the original 3"OD pulley.
I trust the shop changed wiring per instructions to bypass the original voltage regulator.
At idle, the ammeter now shows ~25% discharge w/out lights and ~50% discharge with headlights on.
(Cibie Z-Beams w/ 55w halogen lamps).

At running speed of 2500 - 3000 crank RPM, the ammeter rises to neutral, but does not move to the positive charge side at all.

The interweb tubes believe an alternator won't put out below 2000 RPM at the alternator?
Is there something about the standard ammeter that needs to be rewired?


I would like to be able to feed both the Z-beams and a pair of Cibie pencil beam driving lights using big direct wires and a slew of relays to take orders from existing switches. No hope unless I can get more amps into the system.

Steve Poland
Similar threads
Thread starter Title Forum Replies Date
AH67 59 xk150 gearbox Jaguar 6
Z For Sale 1959 XK150 Absolutely Stunning Jaguar Classifieds 0
J Wanted WANTED; XK150 Triple Carb linkage Jaguar Classifieds 0
HealeyRick XK150 vs Healey 3000 Austin Healey 35
V Engine Stand XK150 What works? Jaguar 5
M MK1 or XK150 Spindle Axles? Jaguar 0
aeronca65t Bertone Jaguar XK150 S Coupe Jaguar 6
M XK150 Rear Brake Rotor Dimensions? Jaguar 1
P XK150 Jaguar 9
J XK150 Roadster Soft Top Latches Jaguar 4
V Brake Servo XK150 Jaguar 3
V XK150 Interior Jaguar 7
V Brake Lines XK150 Jaguar 0
V XK150 Crankshaft Seals Jaguar 7
V Pinion XK150 Jaguar 0
V Undercoating XK150 Jaguar 0
V XK150 Crankshaft seals Jaguar 5
V XK150 dash pad Jaguar 2
A XK150 FHC Test Drive Jaguar 1
W heads up to XK150 scam Jaguar 11
mgbmedic Jaguar XK150 Bill of Sale Jaguar 3
J 1958 xk150 fixed head jaguar coupe Jaguar 3
M XK150 Q & A Jaguar 1
I Paint question XK150 Jaguar 2
astults TR2/3/3A Dynalite alternator by Powerlite Triumph 13
PAUL161 T-Series Dynamator Alternator conversion. MG 16
B Delayed charging Lucas alternator Triumph 1
Merlin63Tr4 TR4/4A Alternator or alternator in a generator case? Triumph 4
Walter74 Dynamo to alternator Austin Healey 2
S Stag Lucas 18ACR alternator conversion Triumph 5
Got_All_4 TR5/TR250 Rebuilt Bosch Alternator stops charging Triumph 0
donbmw TR2/3/3A Converted to alternator Triumph 14
90dog A H Spares Alternator Bracket Austin Healey 53
R TR2/3/3A generator to alternator Triumph 5
JPSmit Alternator help - please. Spridgets 21
I Bugeye generator/alternator conversion question Spridgets 7
Ripper01 TR6 110A Alternator Triumph 7
F TR2/3/3A I'm stuck... alternator/wiring/starting/? Triumph 2
Sopwith_Camel alternator eater Spridgets 20
longbridgehealey Alternator conversion and tach Austin Healey 9
S TR2/3/3A Alternator Triumph 7
apbos Positive Ground Alternator wiring. Spridgets 9
BoyRacer Wiring question for alternator conversion Austin Healey 3
RAC68 How does a 12 Volt Alternator charge a battery to read 18+ Volts Austin Healey 8
M TR2/3/3A Water Pump Belt After Alternator Conversion Triumph 6
J MGC Lucas alternator/regulator MG 3
K TR2/3/3A Revington alternator heat shield. Triumph 0
G TR2/3/3A Wiring ammeter with the British Wiring alternator conversion. Triumph 13
K TR6 71 TR6 Alternator Connections Triumph 9
Got_All_4 TR2/3/3A Just Discovered These Alternator Conversion Anyone Do One Triumph 15

Similar threads