BlueMotion Gearbox (JDD) fitted into 1.4 TDI AMF engine

Yes, but a 1.4 tdi also has 200cc more and with a remap it should have as much low down torque as the 1.2 tdi. And even though a 1.4 tdi is heavier its not much more then a couple of extra persons in the car.

But if Tom comes up with solution to the speed signal thing on 1. gen cars, I will start looking for a 6-speed MYP box..

Alex
 
A 3L weighs about 800Kg. A 1.4TDi in service can weigh as much as 1250Kg, that is a very significant weight difference - it's almost half as much again!

The 1.2 had peak torque at 1800RPM, the 1.4TDi is 2200RPM (in standard tune). Again, very different engine behaviours
 
motosport said:
And Tom, please elaborate more about your findings on getting the older cars to read the ABS speed signal.
Click to expand...

Hi Alex,

What is the identification number of your car, please? This is the number at the base of the windscreen that you can read from outside the car, beginning WAU...
Do the needles of your instrument cluster illuminate when you turn on the ignition, or only when you turn on the car's lights? Do you know the part number of your instrument cluster?

Does your existing gearbox have a speedo drive installed?

02J.jpg

As you can see in the photo above, the speedo drive is located above the differential. If this is installed, is there a plug and wire connected to it?

I am fairly sure I can adapt a UK instrument cluster to pick up a speedo signal from the ABS system, but I have not yet tried it because there has, so far, been no need. I'm not sure whether I'll be able to do the same for left-hand-drive A2s, as I have not yet had the opportunity to learn. If you need to have your instrument cluster adapted in this way, I will be more than happy to help, but I would not want you to drive here from Denmark before I am sure I can solve the problem. :)

If you can answer all my questions in this post, that would be great.

Cheers,

Tom
 
Hi Tom

What would be involved in testing the cluster adaption for the speedo to work off the ABS signal

Cheers Spike
 
spike said:
Hi Tom

What would be involved in testing the cluster adaption for the speedo to work off the ABS signal?

Cheers Spike
Click to expand...

Your car! :)

Basically, I need a pre-2002MY car with which to experiment. First of all, I'd simply want to see what happens when the speedo drive is unplugged. It may be that the instrument cluster automatically starts to pick up from the ABS, or it may be that the speedo needle just sits at zero no matter what the car's speed. I don't know as I've not had the opportunity to play.
Should the needle simply sit at zero, I'd connect one of my spare instrument clusters into the car and make what I believe to be the necessary changes. I would not wish to make any changes to the vehicle's original cluster until I was happy with my method.

Cheers,

Tom
 
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Thanks for your reply Tom,

Unfortunately I am in Kuala Lumpur at the moment, but as soon as I'm home again on August 5th, I´ll check the numbers you asked about and post them up, as well as poke my head under the car to check my gearbox speedo drive.

I would be very exiting if its possible to use the ABS speed signal on older model cars, and that way open up for more gearbox options..

Thanks for putting so much effort into our cars..

Alex.
 
timmus said:
Your car! :)

Basically, I need a pre-2002MY car with which to experiment. First of all, I'd simply want to see what happens when the speedo drive is unplugged. It may be that the instrument cluster automatically starts to pick up from the ABS, or it may be that the speedo needle just sits at zero no matter what the car's speed. I don't know as I've not had the opportunity to play.
Should the needle simply sit at zero, I'd connect one of my spare instrument clusters into the car and make what I believe to be the necessary changes. I would not wish to make any changes to the vehicle's original cluster until I was happy with my method.

Cheers,

Tom
Click to expand...

Hi Tom

I can try disconnecting the speedo drive and report back but I thought swapping instrument clusters would be a massive job. PM me with more details of what's involved

Cheers Spike
 
dan_b said:
A 3L weighs about 800Kg. A 1.4TDi in service can weigh as much as 1250Kg, that is a very significant weight difference - it's almost half as much again!
Click to expand...
You are nearly right : the 1.2 "3L" is 855 kg according to Audi.
And since it has only a 21L tank and can't be weigh down by optional extra's (such as aircon, OpenSky, Bose, space saver wheel, leather, bigger wheels,...), its weight can't be higher, unlike the 1.4 TDI (bare weight of 1070 kg, according to Audi).
So that's 875kg for the 3L (but more for the 1.2 TDI 'not 3L", depending on the extra's fitted).
 
Tom,

I finally had time to tinker with the car and try to move forward with my gearbox change plans.. And to answer your questions from earlier..

- ID number on my car is. WAUZZZ8Z62N035410
- the instrument needles do illuminate when I turn on the ignition
- the gearbox does have a speedo drive, but its blocked with a bolt and there are no plug or wire into it.
- I don't know the part number on my instrument cluster, unfortunately..

So what does this mean in relation to what gearbox I can use.? I am eagerly awaiting your answer Tom..!! The JDD boxes I have been looking at, all the the plug for the speedo drive, so does that mean I can't use that box.? Or does my car get its speedo signal from somewhere else, and I just have to plug the hole on the JDD box in the same way as mine.?

Alex.
 
motosport said:
- ID number on my car is. WAUZZZ8Z62N035410
- the instrument needles do illuminate when I turn on the ignition
- the gearbox does have a speedo drive, but its blocked with a bolt and there are no plug or wire into it.
Click to expand...

Hi Alex,

Thanks for supplying the above info. The news is good! Your car already uses the signal from the ABS sensors to calculate its speed, meaning you can install any gearbox that is physically compatible. If you buy/fit a gearbox with a speedo drive installed, it doesn't matter; simply leave it disconnected, as your instrument cluster has no need for that signal.

Happy days! :)

Tom
 
Yes, that's a good price and the box looks in very good condition. Pretty low mileage, too!. I've tried everything, including this type of gearbox. I do quite a bit of lane-work and I found that I couldn't

pull 4th gear very often. I moved on to a 6-speed conversion. Obviously, that was high cost. However, from experience, the best of all on a value for money basis was to fit a different ratio 5th gear.

The

difference here was that it was a 0.681 ratio and not the usual 0.659. That did make a huge difference to useability! There wasn't such a gap between 4th and 5th and it pulled very well! It is only

when you have actually experienced these things that you can fairly comment on them....
 
Thanks very much for your informative answer Tom.. Very helpful..

It seems like the world is my oyster then, so I better start hunting.. I am still leaning towards the JDD box because its cheap and I know that gearing works very well in the 1.2 tdi, even with its modest torque output of 155NM, and I feel confident that my remapped car with its 240NM can pull it too. But now that the option is open for the 6-speed MYP box, that is of course very tempting.. I guess it depends on what price I can find them at.. Decisions, decisions..

Alex.
 
A remapped A2 works well with JDD.

I think it is better because your not changing gears as often, for instance accelerating off a slip road etc you don't run out off puff.
But then a gain it depends on your driving style. I drive on A roads every day, so the JDD gearbox was a no brained for me.
3rd gear is my favourite as you can travel from 30mph to 70mph no problem.

Thanks,
Ross
 
I'm loving my 6-speed conversion that A2 Cars did for me I have to say. Would be strange to return to an A2 with "just" 5 gears now.
 
dan_b said:
I'm loving my 6-speed conversion that A2 Cars did for me I have to say. Would be strange to return to an A2 with "just" 5 gears now.
Click to expand...

I also find it odd when I drive a 5-speed A2 these days. My conversion was done by Stealth. For those living in Denmark, though, UK-based garages are of little use. So, the MYP 'box is probably the best option for those looking for 6 gears. That said, your 6-speed conversion was done in mainland Europe; the forum just doesn't know by whom.

I drove Murdo's TDI90 earlier today. If one is going to stick with 5 gears, the slightly longer cogs are nice.

Cheers,

Tom
 
dan_b said:
I'm loving my 6-speed conversion that A2 Cars did for me I have to say. Would be strange to return to an A2 with "just" 5 gears now.
Click to expand...
Yes, swapping over to my wife's A2 does feel strange.

What I find even stranger is that when driving mine I sometimes even try to change up from 6th!!!!
in some way that is testament to the 6 speed being perfectly geared. The gap between all gears seems so right that I don't even realise I am in 6th (if you know what I mean).
If the 6 speed conversion was not so well geared you would KNOW that you are in 6th because it would feel flat or seem to be a big gap from 5th.

Steve B
 
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