131mirafiori forum

I would like to get a manual gearbox to fit my 131 mirafiori 1.6 automatic.
If anybody has one for sale please contact me as I am trying to reduce my fuel usage (currently 21 MPG ) Joe Egan

I have a spare 5 speed 131 box but as I'm in the UK getting it to you might be costly.

You will also need a flywheel, clutch, release arm, manual pedal box, gearlever, clutch cable and possibly a manual centre consul.

I think the front section of the tailshaft is also a different length between manual and auto.

No, Dave is right, he's listing almost everything that is needed (add a pilot bearing for the engine, auto engines usually do not have that).

My own car was originally a 1600 OHV auto.
Then engine was changed to 1600 TC, auto box remained.
Engine changed again to 1400 OHC, auto box remained.
Then back to original engine with 2 litre manual gearbox - this particular combination does not allow mounting of a starter!  :o

All those mods were done by her previous owner, who was kinda reckless  ;)

Essential modification when converting to manual trans is grounding of the wire that prevents starting an auto trans engine in P, D, R and 2 - otherwise the engine will not start!

   Is the end of an Auto crank machined to take the bearing ?   Probably but it would be worth looking if any one has one laying around.



            Roger.........

... and at the end of all that you'll probably get 23mpg so unless you do a lot of mileage it will take a long time to recoup your costs. 

Hi Theo, I was thinking much the same.  But if the shell is good  ;D and you are a fun driver, it will make the car more usable, I'm thinking.   If its a second car you can collect the parts over time, maybe even a Manuel engine and box together.   The crank can be machined for the bearing if required.

  A tip,  see if you can get some 1600 twin cam pistons for the 2.0 Ltr  raises the compressions with out having to play around.  ;)

 

I very much appreciate all of the replys to my query. I removed a two litre engine from an automatic 132 about 1980 and the end of the crankshaft was already suitable to fit the pilot bearing in it
and I fitted it without any difficulty in a 131 with manual gearbox, and we had many happy and hairy tours in it. I was already told by an elderly mechanic friend that the improvement in MPG would be very little.   Does anybody know if a modern 1.6 engine with fuel injection can
be fitted to a mirafiori, I have heard many differing opinions about the possibility of success.

If your going to mess with injection, why not do the  2ltr after all the 16v is supposed to get better than 30mpg so an eight valve should be better I would have thought.

If you really want to raise the compression ratio pistons out of the 1800 (I think) Lancia Prizma are the best they are higher domed than the Fiat 1600TC but fit the same bore and they work very well. Its what I had fitted to WLA917X when she was mine also had the head and block skimmed which worked well with the wild cams and a pair of 40's and had no mechanical issues even long term.

Is it not all about the joy of driving these old car and not worrying about the cost of fuel 131s were never easy on fuel in the first place