Today we wanted to share video as we rebuilt the innards of our Lucas AB14 (DAB102, 2-wire version) Ignition Amplifier. This unit costs a high amount to buy new, but it turns out inside is a VERY common part!
Additional Data for sourcing Condenser (Lucas 1mf 54400556) and Zener Diode, and notes on resistors in 4-wire DAB106:
I found this data in my research that was very helpful - PDF attached to this Forum thread - www.mgexp.com/forum/mgb-and-g...
In that PDF that luckily credits certain people who contributed, and from "Randy Wilson" it states:
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"The Lucas 1.0uf capacitor is not available. Most all US cars with the 4 pin GM HEI Ignition system used a .3uf RFI (Radio Frequency interference) capacitor before 2000, later cars are using .47uf/250 volts capacitors for ignition coil RFI. You will have to modify mounting tab for installation inside amplifier, or you can just put the capacitor on Ignition coil mounting bolt. MOPAR 5149011AA Ignition Capacitor ($15), MOPAR 4606866AA, Standard RC26 or similar.
The Lucas 350-volt clamping Zener diode is not available. Although the current 4 pin module shouldn’t need extra external protection from a 350 Volt clamping diode, you can wire a 190-volt and a 160-volt clamping diode in series to achieve the desired 350-volt protection. (1N5387B, 190V, 5W ZENER DIODE) ($1.10) and a 1N5384B, 160V, 5W ZENER DIODE ($1.10) (E-Bay) Ground one end to one of the two mounting screws for the ignition module.
The Lucas AB14 4-wire units (DAB106) are the same as the 2 wire units (DAB102), except for 2 internal resistors circuits, one for the Tachometer (10K) and one for EFI triggering (6.8K)."
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If I find the original source URL I'll update links to better credit those who shared this great info. But thanks to Randy Wilson who appears to have authored that section!
PARTS AND TOOLS:
Note: Any links to Amazon will be through our affiliate program, so Vortex Garage may get a small commission. I will only link to items I would purchase or have used in the shop, and we'll strive to give options where possible.
Note that for parts, we can only link to the make/model we used - you'll need to validate all parts fit your application. Also you may choose to source your parts or tools from another location, perhaps at lower cost to you.
PARTS:
OEM Style HEI Module:
ACDelco Professional D1906 Ignition Control Module
amzn.to/3LvtcuE
Alternative:
Pertronix D72000 Flame-Thrower HEI III 4 Pin Ignition Module (GM)
amzn.to/33jeq9e
This unit is generally known as a high quality aftermarket that offers some benefits even beyond OEM. It is more expensive however.
SXL Wire - designed for higher temp exposures
14ga SXL: amzn.to/3HSAlmQ
16ga SXL: amzn.to/3uKxyIo
I did not cut any of the wires, but guess they are either 16 or 14ga. I'd err on the side of 14ga for thicker replacement wire.
If anyone comments on correct wire size I'll update this notation.
Thermal Paste:
Arctic Silver 5 - the good stuff:
amzn.to/3GJXwhE
Silicon Based off-brand:
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amzn.to/3uRZlqi
High temp harness tape:
5 Rolls Tesa's Most Advanced High Heat Harness Tape 51036
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Heatshrink:
Wirefy 275 PCS Heat Shrink Tubing Kit - 3:1 Dual Wall Tube - Adhesive Lined
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Permatex 80632 Thread Sealant with PTFE
Used on one bolt in case it went through the manifold to ensure a good seal
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Tools if needed:
TEKTON 3/16 Inch High-Torque Nut Driver | 26862
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TEKTON 5 mm High-Torque Nut Driver | 26882
amzn.to/3HL5FDH
GEARWRENCH 51 Pc. 1/4" Drive 12 Pt. Mechanics Tool Set, Standard & Deep, SAE/Metric - 80301
amzn.to/3LwPn3B
Set I own: GEARWRENCH 47 Pc. 1/4" Drive 6 Pt. Socket Set, Standard & Deep, SAE/Metric - 80314D
amzn.to/3sBYwzb