Volvo-B21-B23-4-R-V

Brand	Volvo
Cylinders	4
Operating voltage	4-15V
Wires	Black: coil '-', Red: ignition key (battery 6V / 12V)
Model	Switch
Rotation direction	CW & CCW
Vacuum	Vacuum
RPM range	500-8000 RPM
IE (D-jetronic support)	Non IE
Environmental temperature	-30 – 100 °C
Cap type	Straight
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

the 123\VOLVO-B21-B23-4-R-V is designed for the Volvo B17, B19, B21, B23 and B230 engines, not only for classic cars like the Volvo 242, 244, 245 etc but also for the trucks and boats ( Volvo Penta ) .

the 123 offers advance-curves for B17 – B25 Volvo & Volvo Penta engines including turbo engines. This is the result of thorough research in the original Volvo-workshopmanuals. (even a couple of optimised LPG/Ethanol curves are available )

The unit offers a maximum total of 16 advance-curves to be selected by the end-user.
Please take a look in the table below for available advance curves.

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Download the manual

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The complete tutorial

How to install a 123ignition distributor

curve	advance starts [rpm crankshaft]	max. advance [rpm]	[degr. crankshaft]	vac. adv. starts [mmHg]	max. vac. adv. [mmHg]	[degr.]	replaces	remark
0	1000	4500	30	200	400	14	BOSCH 0231.170.134, 0231.178.010	VOLVO B21/23 PENTA
1	1000	3800	26	200	400	14	BOSCH 0231.178.016,17,18 & 19	VOLVO AQ131, AQ150
2	1000	3000	25	150	400	14	BOSCH 0231.170.185, 0231.170.284	VOLVO
3	1000	5000	25	150	400	14	BOSCH 0231.170.287	VOLVO
4	1000	4000	25	150	400	14	BOSCH 0231.170.302	VOLVO
5	1000	4000	30	150	400	10	BOSCH 0231.176.103	VOLVO
6	1000	6300	29	150	400	14	BOSCH 0237.002.001, 0237.002.017	VOLVO
7	1000	4800	23	150	400	14	BOSCH 0237.003.027, 0237.003.024	VOLVO
8	1000	5000	29	150	400	14	BOSCH 0237.003.003, 0237.003.009	VOLVO
9	1000	4000	28	150	400	14	BOSCH 0237.002.038	VOLVO
A	1000	4800	22	150	400	10	BOSCH 0237.002.007	VOLVO
B	1000	4500	30	200	400	14	BOSCH 0231.170.134, 0231.178.010	VOLVO LPG/E85
C	1000	4000	30	100	300	10	BOSCH 0237.002.001, 0237.002.017	VOLVO LPG/E85
D	1200	4800	22	100	400	20	BOSCH 230FH-MODULE	VOLVO
E	1000	3900	25	120	235	15	BOSCH 0237.024.013	VOLVO
F	-	-	-	-	-	-	-	-

Where to buy?

Download the manual

How to install a 123ignition distributor

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