MG-4-A-V

Improve the performance of your classic car with this highly reliable electronic ignition distributor.

The 123MG-4-A-V is designed especially for the MGA and MGB. This unit offers vacuum advance as well.

Brand

MG

Cylinders

4

Operating voltage

4-15V

Wires

Black: coil '-' , Red: ignition key (battery 6V / 12V)

Model

Switch

Rotation direction

CW & CCW

Vacuum

Yes

RPM range

500-8000 RPM

IE (D-jetronic support)

No

Environmental temperature

-30 – 100 °C

Cap type

Angled

Dwell

Constant current: fully automatic adaptive dwell

Coil charging time-out

After 1 second , coil current is turned off

Spark balancing

<0.5 degrees

Maximum advance

40 degrees crankshaft

Categories: ,

The 123MG-4-A-V is designed especially for the MGA and MGB.

All the advance-curves, that were ever specified for these cars, are integrated into this product.
For MGC see 123GB-6-R-V.
The unit offers a maximum total of 16 advance-curves to be selected by the end-user.
Please take a look in the curve table for available advance curves.

MG 4 – A – V  = MG stands for the 123ignition type 
MG – 4 – A – V  = 4 stands for the number of cylinders 
MG – 4 – A V  = A stands for angled distributor cap 
MG – 4 – A – V  = V stands for vacuum advance  

How to install a 123ignition distributor

Download the manual

Tune+ App Manual

Where to buy?

Do you want to know where to buy the 123Ignition in your area? Check out the dealer page!

curveadvance starts
[rpm crankshaft]
max. advance
[rpm]
[degr. crankshaft]vac. adv. starts
[mmHg]
max. vac. adv.
[mmHg]
[degr.]replacesremark
050022002810030018MG-A DM2/40510set static at -10 degrees, HC at -5 degr.
1500440024100300164091618GG (LC),18G,18GA,18GB,18GD
25002200201303302040897,4115518G,18GA,18GB,18GD,18GG(HC),18GF,18GH,18GJ
31000460020100300104133918GK
41000450020100300104137018G584Z, 18G585Z
51000430033100300104149118V672Z, 18V673Z
6700220014130330204128818V581F-18V583F-18V581Y-18V583Y (HC)
7700420018100300164129018V581F-18V583F-18V581Y-18V583Y (LC)
870022001975200144103218V (HC)
910006000271003001641234,41391,4169218V892AE, 18V779F, 18V780F, 18V893AE
A100058002475550244161018V846F-18V847F
B1000500026100300104159918V797AE, 18V798AE
C100044002210030010-intended for ‘stage 2’ engines
D10004500291003001041600,4164318V801AE, 18V802AE
E1000450029100300104169318V883AE, 18V884AE
F1000450029100300104169518V890AE, 18V891AE

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