re: The FIAT 1100/Premier Padmini Technical Information thread Quote:
Originally Posted by 1100D So on a 1100D with a mechanical Fuel pump, will the outlet from the newly introduced electric fuel pump feed into the Mechanical Pump as usual? Or the mechanical pump can/has to be bypassed. Moreover, is this a PP distributor, if yes, would like to know what type it is? | Dear Anirban - on your electronic fuel pump query, you are correct, the outlet from the electronic fuel pump will feed into the mechanical pump as usual. Just by looking inside the engine compartment, nobody will even know that the electronic fuel pump is fitted below the spare wheel. All the fuel lines in the engine compartment remain exactly the same as before.
On your distributor query, Lucas TVS distribuotrs for PP car came in 5 types. Initially introduced in around 1974 to replace the original Magneti Marelli distributor, the base drive was a little longer with two adjustments, one from the mounting and second from the intermediate plate (similar to what is seen in the photographs that you have posted). Then in around 1981, the intermediate adjustment was removed. Both these distributors had only centrifugal advance of 15 degrees cam angle built into them. Then in 1986, vacuum advance distributor was introduced for the first time to meet the 1996 emission norm ECE15.04. The Lucas TVS part number of this distributor ended as "65A". This distributor had centrifugal advance of 13 degrees, as compared to 15 degrees earlier, but this was to be used with 10 degrees BTDC ignition timing. However, due to leaner setting of the mixture strength introduced to obtain good fuel efficiency, pinging and knocking was observed from the cars in the field. Therefore, in order to resolve this issue and also continue to obtain good fuel efficiency, distributor with Lucas TVS part number "65B" was tested in February 1989 and then introduced in production. In this distributor, one of the springs of the centrifugal advance was changed, it was imported from Lucas England and fitted. Incidentally, the same spring was used in the Standard 2000 car also. At the same time, the S1 engine was being developed. A third distributor was developed with AVL defined characteristics, with the Lucas TVS part number "90A". This distributor was to be used with 7 degrees BTDC ignition timing. S1 prototypes were made and tested in 1992 and the car was introduced in 1993.
The distributor in the photograph is not a PP distributor. The direction of rotation is anticlockwise, the vacuum advance diaphragm position is opposite to what is required. This one seems to be an Ambassador distributor but with the straight outlet cap on it. As far as I remember, Ambassador had the 90 degree outlet cap. I had actually fitted an Ambassador distributor on a PP car engine and started the engine on the test bed, but power output was pathetic as expected. This was done when we were working with Lucas TVS to develop the vacuum advance.
I hope this clarifies.
Best regards,
Behram Dhabhar |