Quote:
Originally Posted by DHABHAR.BEHRAM Dear all - copying and pasting my efforts of last 4 days of typing at home. I hope it is useful. Here goes.
[b]Conversion of Premier Padmini engine to run on a Mikuni carburetor:
... The normal way - or the "easy" route is to fabricate a so-called "adapter" having the Solex as well as Mikuni mounting faces. I have seen examples of adapters fabricated from a half-inch thick steel flat to sand casting around 50 mm high.
Best regards,
Behram Dhabhar |
Dear all,
Many thanks to the Fiat Guru for all his valuable inputs in my endeavour towards developing an adaptor for installing a Mikuni carburetor in a Premier Padmini.
For those who were not aware of, I have acquired a Premier Padmini (belonged to my maternal uncle and then bought by a friend of mine, now with us again). As my friend (Ashok) had left for abroad for higher studies he just gave the Padmini back to me once and for all. So, in the month of February one fine morning we (I and my wife Priya) boarded a train from Trichy to Madurai to pick up the car. Thanks to Ashok's mom for keeping all documents ready and had got a general service & check up done by a mechanic. I was all excited about driving the car back home. Had breakfast and we were about to leave. Just by intuition I had opened to check the oil & water levels. A cracked radiator hose grabbed my attention. Though it was not big, I could see drops of water dripping. Still I dared to make the move. Filled it water, carried a can of water and started our journey. Maintained only 50kmph all though and reached home without a hiccup.
The radiator hose, leaking pushrod cover, black engine oil & filter, etc. needed immediate replacement. Luckily parts were available in Trichy itself. Now, the bigger problem was the Solex carburetor itself. It was not able to keep the engine at idle. Either engines revvs fast or dies. The wornout butterfly was to be blamed. Hence the Mikuni conversion got added up to the To-Do list.
Fast-Forward, End March. I had to go to Trichy for a week at attend to a medical emergency for my mom. By God's grace she was back home after a surgery the second day we reached. Hence my wife was more occupied in taking care of her. The insect inside my brain wouldn't let me sit idle. Though I hadn't planned to take up the Mikuni conversion this time, I thought I would rather do the preparatory work and keep the car ready for carburetor swap.
Referred to late Mr.B.D's posts and made myself to take up the plunge.
1. Equip the tank with a fuel return line.
Since bringing down the fuel tank and working on it would require leaving the car at a garage, I had devised a different strategy for the return line. A slot was cut on the spare wheel well to gain access to the fuel suction pipe installed in a triangular flange. Bought a full roll of copper tube used in LPG kit installation. Used a small portion of it to make the return pipe. An extra hole was drilled in the flange and the new pipe was brazed. The round hole in the tank had to be widened to accommodate both the pipes. An L - plate with welded nuts was used to stitch the wheel well floor back in position.

2. Cable operated Accelerator pedal
My search for an S1 or 137D turned futile. Picked up a M800 pedal assembly for Rs67/- and welded an "L" to it to offset the cable mounting pin to the right side of the firewall support. The cable entry is very much at the same place as in the S1. The pedal pad has been removed and welded with an eye so that the Padmini pedal could be connected to it with the L-pin. Sorry, dont have the picture of this part at the moment. Satisfied with the results, I had packed up from Trichy and back at Pune. The search for a good carburetor is now "ON".
That's all for now. Rest during my next visit in the end of this month.
All thanks to a welder in our locality. An enthusiastic and genuine guy.