The S1 (any in fact) Fulvia runs best on the original steel wheels with the original tyre size. Bridgestone makes an excellent 145/80R14 tire. It has to be inflated to a somewhat higher than usual pressure. I use 2.2 to 2.4 bar. If you insist on changing to 13" rims you can use 165/80R13 tyres...

:) Hello and Merry Christmas fellows . I continue progressing little by little with my Fulvia S1 1.3 Rallye S. There are things that I solve and others that are coming out. I made the gearbox, and although the gears don't go in as smooth as they should, it works reasonably well. Now I have seen a ge...

Hi, I have completely redone the engine and gearbox of my 1970 S1 Rally 1.3 S four speed. Little by little I have adjusted it and I have to say that it runs like silk. I am very happy with it. The problem is that when I stop at a traffic light (or traffic stop) with the window open, I notice the sme...

Huib, thank you for your answer. You are a well of Fulvia wisdom. I think I understood you, in the housing I changed the two bronze bushings of the selector shaft because it was losing oil. About the hammer, do you mean the part surrounded in red in the photo? The idea is to make it grow with weldin...

After finishing the box and connecting it to the car, it works wonderfully. I put the oil recommended by Huib and it's going very well. The marches enter well, but sometimes it's hard for me to find their place. I have checked the lever mechanism and I only see two things that I can adjust, the bar ...

Thank you for your answers Huib. I finally got the original keys and they are now in place. Now I'm a bit desperate, I've assembled the box (without putting the transmissions together yet) :evil: , I've tried to put the gears in when stationary and all of them go in except 1st and 2nd. This shifter ...

I'm very glad that this thread is helping more people. Today I finished turning the 3rd gear selector pinion and installed new synchronizers. https://i.ibb.co/p4Kzdbx/IMG-20240427-114000-edit-4701650978448.jpg Now I have another doubt when assembling, I have seen that I am missing some cotter pins o...

Hello, I need to remove the part indicated with the arrow on my Fulvia S1. I have removed two nuts at the ends under the dashboard but it doesn't come off, I think it is also held in the central part, but I can't figure out where. Thank you! https://i.ibb.co/S6Hz1x0/Screenshot-20240205-152218.jpg

I don't want to tempt fate, remember that there was a 50% chance of putting the sliding sprocket wrong... And I did it hahaha. I'm afraid of opening the box and not leaving it properly. I changed the first gear pinion (the original one literally had the synchro teeth undone), I exchanged some synchr...

Hello everyone, first of all I wish you a Merry Christmas. I haven't started on the box yet, but I'm gathering pieces in the meantime. I'm having my head spin with the hard second gear shift. Do you think it could also be due to the wear of the shifting sprocket between first and second? Is it worth...