Lamborghini Jalpa
Ignition-Upgrade

Layout of the Bosch Box 0227 300 002:

#1: Black w/ White Stripe - Coil +
#2: Black w/ Yellow Stripe - Coil -
#3: Braided Copper Wire (braid comes off yellow wire plugging into #7)
#4: Brown - Tacho
#5: Not Used
#6: Black - Ground Distributor Signal B-Pin
#7: (2 Wires) Solid Yellow & Solid Green Distributor Signal A-Pin
#8: (2 Wires) Solid Red & Yellow w/ Black Stripe - Ignition/current

Improve your Ignition

All the carbed Lamborghinis suffer of a bad throttle response when suddenly accelerating, specially the change fom idle position to open. Specially in turns this is not very satisfying.

My experience is, it's not a problem of the carburettor adjusting alone, it's mainly a problem of a too weak ignition which does not deliver enough power to burn the fuel/air mixture completely.
I installed a MSD 7 AL-2 on my Countach and the improvement in drivability was incredible.

First step I did on my Jalpa, was to replace the stock Bosch Coil with a MSD Blaster 2 coil.
This is a very easy change since you can change one coil to the other, both have the same resistance of 0,7 Ohm.
To attach, wire as follow:

1. Blue/Yellow to positive side of coil (B-Terminal of Bosch).
2. Black/White to negative side of coil (A-Terminal of Bosch).

It was zero degrees outside and had snow therefor we made only a check-up run, I turned the key, let the pump build up fuel pressure and started the engine. Surprisingly it needed only some turns to start and was immediately running round.
Every push on the throttle was immediately responded without coughing, unbelievable since the engine was really cold.

Installation of a MSD 6 AL

Next Step I plan and was already done by Fred K. and Steve W., is installing a MSD 6 AL ignition unit. Problem is the adaption of the tacho signal you have to use a Tacho adapter.

Fred's car didn't want to accept any tacho signal, he had to update his tacho with a new modern circuit.

Steve installed the unit as followed:
I installed the MSD in the car and the tach has always worked.
MSD 6A Box, Tach adapter #8920, Blaster SS coil #8207.

Photos by Steve:

I installed the MSD 6-AL without a tacho adapter, it happened that my tacho didn't work with and without the adapter.
I found another solution which should work with all tachos...

Left Countach (all 5l), right Jalpa

Mounting plate, material and instructions to connect the MSD 6: $50

Another possibility: a Perma-Tune Ignition Box

The Bosch box on the Jalpa was also used on the Porsche 930, Perma-Tune made upgrade kits for this Box since the original Bosch-Box is too expensive and is still old technology.
Perma-Tune offers the possibility to send the old box and they will convert this box to new technology, this way the box looks still original.
Price of the box seems very reasonable, $488 compared with $2000 for a replacement Bosch-Unit.

Model 930 Ignition Module

The 930’s original equipment ignition box with the eight-pin connector is very hard to find in the US. This is because the 1976 and 1977 Porsche 930 turbo was not officially permitted to enter the US due to failure to meet the new California Air Resources Board (CARB) fuel economy and emissions standards required for certification. The Perma-Tune model 930 is a bolt up and plug in replacement ignition box that improves engine performance and reduces hydrocarbon emissions. It can be used on any engine that uses the Bosch 0 227 300 008, 0 227 300 007 or 0 227 300 004 ignition module.

Check out their homepage for further information:
Perma-Tune Ignition box, Installation Guide

MSD spark plug wires

The wires come un-cut on the distributor end. The spark plug end is already fixed. You simply match the lenght to your size and cut extra off and crimp on the 90 degree boots for the distributor.

Unlike Steve I installed the original MSD boots directly on the plugs.
Since the original OEM Cavis wires are only 7mm and the new MSD 8,5mm, you need to enlarge the wholes of the dust caps and the donut which holds the wires. I used a 9mm driller to enlarge the wholes of the donut, for the dust caps a 8,5mm driller is better for a good tight when installed. To install them use a good silicone spray, makes it much easier to pull the MSD wire. In the picture the grey part is the MSD boot wich comes assembled on the wire and dust cover is what you already have.

Bosch Distributor