Hilux 4x4



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Fitting a Golf Carburetor in a Hilux - By Bennie Hurter (aka Benhur)

First impression:

I took it on the highway yesterday and it does not go half bad, I was actually impressed performance wise. The only thing I found was a bit of sluggishness/hesitant on the bottom end (I was in some stop go traffic on the Highway due to an accident). Last night I played around with the vacuum advance on the dizzy. The integrated Dizzy that Dawie bought has 2 vacuum connections, the one closest to the dizzy gets fed via manifold vacuum and the other one via throttle vacuum. This one advances the timing as you start opening the butterfly on the carb. This carb has 3 outlets next to each other that you can select from to use. I now moved it to the one on the left and used the cap that covered it to cover the middle on that was used before. Now this vacuum is applied a little quicker that before and she feels much better. I will drive her again today and see how she feels.

Note the vacuum switch I mounted on a little bracket that was there already as if made specially for this purpose. This valve is switched on with the aircon pump to provide vacuum to the carburetors idle up vacuum actuator to push up the idling when to compensate for the aircon pump's load

The 3 different positions on the side of the carb to which can be used to advance the timing from throttle vacuum. I selected the left on which reacts the quickest on throttle movement

Dawie's feedback:

OK Guys, I've emptied the first tank of fuel, so can give some indication of the success of the conversion.

The costs included this:
Adapter Plates
Air Filter adapter
New petrol cable
Dyna Tune
Electronic Dizzy
Some labour and bits of spares.

I have to mention that I did not try to do this cheaply, I rather went for new parts, except for the electronic dizzy. I got a used one for R1 000. Toyota recons R6 500 for a new one. :(

So my total cost for the project was a shade under R4 000. Of which the carb was R1 200 and the dizzy was R1 000.

My initial feeling was that the van felt as if it did not accelerate as fast as it used to, but it seemed to keep the speed up better than before. Then I realized that it just feels so much smoother with the electronic dizzy, and you can really feel the second throat of the carb open up and deliver more power when needed. Where I usually had to gear down as far as 3rd on some uphills to maintain 80km/h, and now coast up in 4th at 95km/h. So there is a massive difference in power and ease of driving. Cold starts is a little hard, but the engine warms up pretty quick and then it just feels great!

I have been driving from Pretoria to Johannesburg and around Johannesburg for the past few days. So some hi way driving, but mostly stops and starts and traffic, and my fuel consumption improved from 5.2km/l to 7.6km/l under these conditions. This mean a saving of R65 per 100km in my fuel bill. That is at current fuel prices... So I have to drive a shade over 6000km's to make up the cost. That is the average distance of one trip for me and I do 4 a year....

So is it worth it? Well, for me it is! I realise the cost was almost enough to through an extra couple of thousand towards it and go for EFI, but for what I use my vehicle for, I need to be able to fix it with a bloudraad and tang in the middle of the Congo....

So for me it was a great success. Thanks Bennie for your great help!!!

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