I invited him and last week he drove about 400 km to get some help from me to do the same. Before he visited me I asked him to do all the manufacturing and also mount the oxygen-sensor which shows the exact Air/Fuel ratio (AFR) while engine is running.
I only had my own engines AFR values from before I changed fuel system, so I was very curious how rich or lean his engine were running...
He filled up his gas tank before he drove to me and filled it up again when he came here.
1.22 liter/10km which is more than OK but he told me that he had been ”Eco-driving” the whole way and never had a measured a better fuel economy.
His AFR value while cruising the highway was as lean as 16.3 which surprised me because I've mapped my mixture to stay between 15 -15.5 when cruising. At Wide Open Throttle (WOT) he never got under 13 which in my opinion is way to lean. I have as rich mixture as 12.5 at WOT. I could notice that my car have much better acceleration than his car but with so lean mixture it was expected.
Unfortunately he didn't get his fuel rail in time so we only replaced the ignition in this first step but prepared everything for the fuel system swap. As soon as he was home again he called me and told me that his fuel consumption was 10% lower and this time he had really driven the car with high speeds and lots of kick downs. He said that it was a totally new growl from the engine, much more responsive than before. This is exactly the same result I've got when I replaced my ignition system and at least 10% lower fuel consumption.
So now he waits for the fuel rail to be manufactured so that he can complete the rebuild.
I thought it could be interesting to know that it is possible to get a higher mileage and it wasn't only my engine that got good results from the swap...
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| Distributor disabled |
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| New six coil |
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| 280 SE |
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| Adapter for trigger wheel |
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| Trigger sensor |
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| Tuning... |
