Vauxhall Carlton 2.0 8v Application? 20ne engine.

[retrocarclub]

I have decided to replace the standard injection system of my 20ne engine with a bike carburettor setup. Due to this I have been advised to checkout Mega Jolt as a way of creating and managing the spark of my engine.

I have a very basic knowledge of Mega Jolt so some things might sound a bit daft but here goes:

I am planning to use the TPS version of MJ because my bike carbs already have a TPS fitted, is this a good idea of would it be better to ignore the TPS and use the MAP version because it is more accurate?

Also as I already have a CPS, would I need to still fit a Ford crank wheel and CPS sensor? Or could I just link up my Vauxhall one?

My current distributor is in the cam casing, controlled by the cam, I guess I would just blank this off?

Any help is appreciated,

Thanks.

[brentp]

Hi,

Here's the excerpt from the documentation. Basically, MAP sensors are preferred, unless you have a very aggressive cam which causes an uneven MAP reading, especially at idle.


On the crank sensor- the ford edis module requires a 36-1 crank trigger- so yes, you would need to retrofit something on the crankshaft.

Hope this helps,
Brent

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MAP vs. TPS

The MJLJ offers two different mechanisms for measuring engine load. See the guide below for determining which is best for your engine.

MAP Sensor:

This determines engine load through measuring manifold pressure. Typically considered more accurate because it directly measures how the engine is 'breathing' and automatically adjusts for varying conditions and modifications to the engine that affect it's volumetric efficiency. The MAP sensor requires a stable source of manifold pressure across all cylinders. If you have multiple runners, like a dual sidedraft configuration, you will need a balance tube with a mini 'plenum' or accumulator to average the manifold pressure across all cylinders.

Throttle Position Sensor (TPS):

A Throttle Position Sensor measures the angle of the throttle plate, which can derive engine load. Use this configuration if you have very aggresive cams and a manifold pressure reading is unstable, especially at idle. The sensor will need to be adapted to the throttle linkage and then connected to the MJLJ

[retrocarclub]

Thanks for your help. Unfortunately I've just checked and found that I certainly dont have enough room to mount the 36-1 wheel on my crack wheel. I suppose I will have to look into standard spark management.

[steer_rally]

A friend of mine has a Vauxhall 8v installed in a mk2 escort and had no problem fitting a toothed wheel on to the crank. I can't remember where he got the wheel (probably ebay) or how he fitted it, but it's definitely on there.

[Ivan]

There is always room enough to fit this wheel !!!

It really doesn't take that mutch space, I welded it on the original pulley and located the
VR on the side of the engine no problem for sure

Ivan