On 03/04/2019 at 19:55, aggel said:

As far as i remember from my studies ( 10 years ago) you should  shifting when you reach top torque for better accelaration consumption etc, means at 3500rpm.

 

You shift at top torque for better consumption, that's true to some extent, because max torque is where maximum volumetric efficiency is. 

 

However, it's not true at all for maximum power. If you want to get all available power to wheels, you have to shift sligthly after top power RPM. Ideally, you shift in such RPM, that after shift engine produces same power output as before. (In power/speed graph, it's visible as point where graphs of two gears intersect) There's no such point for 1.3 Felicia, as visible at mariosti's graph, so you just shift before limiter.

Edited 5 April, 20197 yr by Papez

6 hours ago, Mariosti said:

Actually power won't stay the same

 

6 hours ago, Mariosti said:

a. ~2036 engine rpm, giving around 20kW

 

6 hours ago, Mariosti said:

at the same time (1000 Nm*183.8 rpm)/9550 = 19.2 kW

 

 

I think this is contrary to the law of conservation of energy.

56 minutes ago, aggel said:

 

 

 

 

I think this is contrary to the law of conservation of energy.

The first kW number and Nm numbers are read from a power/torque curve graph, therefore they have some error in them.

 

The second kW number is effectively calculated from the Nm value read from the graph. The difference is below 1kW so it should be clear that those numbers effectively match exactly.

 

The thing you suggested with constant power and different torque at specific speed is actually contradictory to the law you mentioned.

 

What's true is that at constant engine RPM you have constant power, and if you then increase the gear ratio then you'll trade torque for speed at that engine rpm

I could be well out of my depth but as I’m no mechanic. 

How hard would it be to remove gearbox  from Fun 1.6 petrol to recondition it?

is it worth trying or just find a second hand one and replace it?

thanks. 

 

Edited 16 April, 20197 yr by as2

What's wrong with your gearbox?

It whines and the heat selector is very sloppy. ESP getting into 2nd. 

15 hours ago, as2 said:

It whines and the heat selector is very sloppy. ESP getting into 2nd. 

It whines in all gears?

Heat selector?? You mean gear selector...

What do you mean by ESP?

 

Edit: Oh, that would be especially in English...

 

As you've mentioned you are struggling as a mechanic, I recommend letting somebody else removing/reconditioning/installing the gearbox and the gear selector. A second hand gearbox is a gamble.

Edited 16 April, 20197 yr by RicardoM

23 hours ago, as2 said:

It whines and the heat selector is very sloppy. ESP getting into 2nd. 

If you're using "ESP" as short for "especially" English convention is to use lower case "esp": ESP would normally be read as "Extra-Sensory Perception".

 

Also, you do know that you don't have to change the gearbox in order to change the selector?

Apologies for the grammatical errors, I read somewhere else on this forum that the English make more errors than our friends from other counties, I am guilty as charged!

I really don’t want to take the gearbox out so maybe I will start with the gear selector and change the linkage and bushes. 

The car is new to me and I’m excited to get it back to its former glory. 

1 hour ago, as2 said:

Apologies for the grammatical errors, I read somewhere else on this forum that the English make more errors than our friends from other counties,

No apology needed; I wouldn't even have mentioned it if this one didn't so fundamentally change the meaning of your statement.

 

You may well be correct about needing a new gearbox. From what you've said I think the second gear synchromesh may be worn out, which could happen if a previous owner was in the habit of driving with their hand on the gear lever, but changing the 'box wouldn't cure faults in the linkage, where work on the linkage might (not will) improve second gear selection, as well as improving all the other gear selections.

On 16/04/2019 at 10:29, as2 said:

It whines and the heat selector is very sloppy. ESP getting into 2nd. 

 

Sloppy gear selector is often caused by worn linkage. Most often in cross joint, which is closest to gearbox. You don't even need whole new linkage, it's possible to change worn out parts.

 

Bad 2nd gear synchromesh is pretty common. But before changing gearbox, try new oil. It can improve gear change significiantly.

6 hours ago, KenONeill said:

work on the linkage might (not will) improve second gear selection, as well as improving all the other gear selections.

Thanks I will start with the easy bits and hope for the best. 

6 hours ago, Papez said:

 But before changing gearbox, try new oil. It can improve gear change significiantly.

That’s where I will start. I had a quick look today to find drain plus and the plug you refill into. 

 

I did come across this hole which looked like it should have a plug in it.

its on top of the gearbox (I think) near a small spring and lever which (again I think) is something to do with the clutch 

anyone know what it is and should it have something screwed into it!? 

 

Edited 17 April, 20197 yr by as2

1 hour ago, as2 said:

 

I did come across this hole which looked like it should have a plug in it.

its on top of the gearbox (I think) near a small spring and lever which (again I think) is something to do with the clutch 

anyone know what it is and should it have something screwed into it!? 

 

I'm not sure which part of gearbox is on the photo, but it looks like hole for crankshaft sensor. It's not used with 1.6, so there shoud be some sort of plug.

 

There's no dedicated refill hole. Oil is refilled through speedometer output.

22 hours ago, Papez said:

But before changing gearbox, try new oil. It can improve gear change significiantly.

It might somehow improve the whining but will not make miracles, as to cure bad gear shifting in 2nd gear. Repair the gear shifter linkage for that.

If the gearbox worked low on oil or with old oil for long time, you are looking at a new/refurbished gearbox.

50 minutes ago, RicardoM said:

It might somehow improve the whining but will not make miracles, as to cure bad gear shifting in 2nd gear. Repair the gear shifter linkage for that.

If the gearbox worked low on oil or with old oil for long time, you are looking at a new/refurbished gearbox.

 

Did I say something about curing? There's difference between curing and improving. But by changing to proper oil, my gearbox improved from grinding teeth to somewhat heavy, but smooth and quiet gearchange. Looks like Felicia gearbox is very sensitive to oil quality.

 

Gear whine can be sign of dead gearbox, but it can be just loose 5th gear like in this video

https://youtu.be/sfFzAAy84ek

 

2 hours ago, Papez said:

Did I say something about curing?

I was addressing indirectly to OP because from our replies he might think everything will be nice and dandy just by changing the oil. I've seen that kind of miracle thought too many times. Relax.

 

2 hours ago, Papez said:

Gear whine can be sign of dead gearbox, but it can be just loose 5th gear like in this video 

That is exactly why I asked OP if the whining happens in all gears. No answer so far.

I’m not sure if all gears. I will have a good listen next time I’m out and let you know. 

Thaksk for the info. Great help from both of you b

On 17/04/2019 at 19:37, as2 said:

Ι saw that spring in a YT video long time ago:

Is factory installed or aftermarket?

Many times in idle i hear a ''kar-kar-kar'' noise from the engine bay, i press the clutch pedal-release it and the noise stops.

I wonder @Papez that spring could help the reset or it's there for another reason?