Tuning 1.3 d multi jet remap

ianrm · May 31, 2011

At last decided to get Luigi mapped.
Standard it had 74.5 bhp and 101.2 lb/ft of torque. On my normal M1/M25 commute of 58 miles if I stayed at 60mph and 50mph for the roadworks I could get 83 mpg on the dash readout.

After mapping it now has 90bhp and 126 lb/ft of torque. Not massive figures but it feels much much more responsive and pulls a lot better lower down the rev range. At motorway speeds it also pulls a lot better and copes with longer hills without losing to much speed. Top speed on my private runway has increased by approx 10 mph too. But more impresively, doing the commute at 60 mph, I achieved 92 mpg this morning.

So anyone thinking of getting it done I would highly recommend it both for performance and economy.

loveshandbags · May 31, 2011

Thanks for posting the RR graph and the pics. Your Luigi looks a sporty number. Excellent mpg figs and it's good to see that the extra boost gives it the extra 'lift' on the motorway. I guess there will be no test pilots in your MJ !

306maxi · May 31, 2011

Only thing I'd warn about is the clutch and gearbox. Some people in the Panda forum have had their MJ's remapped and it's ended in pain sadly. Is that the Abarth rear spoiler?

ianrm · May 31, 2011

Clutch and gearbox will be fine with the extra power. The spoiler is standard, its the Sport model with a Fiat 500 body kit. Front spoiler, side skirts and rear diffuser. It has also been lowered on KW springs.

306maxi · May 31, 2011

ianrm said:
Clutch and gearbox will be fine with the extra power. The spoiler is standard, its the Sport model with a Fiat 500 body kit. Front spoiler, side skirts and rear diffuser. It has also been lowered on KW springs.

Ah

Dunno why I thought it was the Abarth one.

As I said before I wouldn't be so sure about the box and clutch, the Panda has the same box and clutch IIRC and they seem to be quite near their limits judging by the issues people are having in there.

Linky. Lewey is a very knowledgeable guy and if the 95bhp 500 uses a different box then it does so for good reason.

https://www.fiatforum.com/panda/270627-diesel-tuning-box-clutch-slip.html?p=2767114

ianrm · May 31, 2011

Having just read the thread I see that the car was not mapped but fitted with a tunning box. A tunning just fools the ECU with a few resistors and puts loads of fuel in with no control.
A re map changes lots of parameters and adjusts the fuel accordingly through out the rev range. Some maps are written to deliver limit power/torque in 1st & 2nd gears to help drivability.

306maxi · May 31, 2011

ianrm said:
Having just read the thread I see that the car was not mapped but fitted with a tunning box. A tunning just fools the ECU and puts loads of fuel in with no control.
A re map changes lots of parameters and adjusts the fuel accordingly through out the rev range. With some maps they can be written to deliver less power/torque in 1st & 2nd gears to aid drivability.

I know

But I would advise you to be on the lookout for any clutch slip just to be sure.....

ianrm · May 31, 2011

I don't tend join in the Traffic light GP but do use the car

although I am mechanically sympathetic in my driving style. The car has just passed 60k miles and has been fine so far apart from the exhaust manifold having a couple of nuts come loose, fixed under warranty and a leak from the rad which I had replaced on holiday in Italy.
My other car a 300bhp VX220 did however need a new clutch after running around with 240bhp for a few years. Originally it was 197bhp.

keeforelli · May 31, 2011

Is there a link for these guys?

ianrm · May 31, 2011

http://www.amdessex.com/

01708 861827

loveshandbags · Jun 1, 2011

ianrm said:
Clutch and gearbox will be fine with the extra power. The spoiler is standard, its the Sport model with a Fiat 500 body kit. Front spoiler, side skirts and rear diffuser. It has also been lowered on KW springs.

My understanding is that the gearbox on the MJ I is the C154 ? gearbox rated for 150Nm. The standard output of 75bhp and 145Nm is just below what the gearbox was rated for. If you have increased power to 90bhp surely you now way past the tolerances that the gearbox was designed for. Even if you uprate the clutch for the extra power the whole powertrain would still be under stress. Would you not need the uprated C510? gearbox from the multijet II for this 'upgrade' ?

ianrm · Dec 22, 2012

I haven't posted on here for a while and did not realise it was so long ago that Luigi was mapped.

Well he has now past 120 000 miles since I purchased him new. He is still on the original clutch and has had no problems.

alexGS · Dec 23, 2012

120,000 miles? That's astonishing!

The mpg difference must have paid for the remap several times over? Top result

-Alex

bgunn · Dec 23, 2012

It goes to show that if you tune a car, yet drive it with mechanical sympathy, it WILL last. Very few cars are 'under engineered' these days, the testing process of most is very brutal.

I have it on pretty good authority that Honda, for example, test how well an engine will cope with a lack of oil. They often run an engine with 200cc of oil (i.e. the bare minimum to cover the pick up), and keep grinding 'softer and softer' (i.e. less lift/duration) cams until the engine will run under the equivalent of many thousands of miles thrashing up motorways. If the lift/duration has to be reduced too much, then its back to the drawing board to find out what's failed, in conjunction with tribologists etc.

If you drive like a complete twit you'll break a standard car, but with care, very high power outputs will often be sustained.

STUT · Apr 17, 2013

Good to see that the mpg still keeps around the same figures, exactly what i am after, more response from the engine but whilst saving ££ at the tank. I still can't get my head round why people use tuning boxes though!? Remaps are personal to the car, rather than a box which will pump in to the engine what ever its been set to as standard. AMDEssex... I will look into them! Thanks Ian!

Lincs500 · Apr 17, 2013

loveshandbags said:
My understanding is that the gearbox on the MJ I is the C154 ? gearbox rated for 150Nm. The standard output of 75bhp and 145Nm is just below what the gearbox was rated for. If you have increased power to 90bhp surely you now way past the tolerances that the gearbox was designed for. Even if you uprate the clutch for the extra power the whole powertrain would still be under stress. Would you not need the uprated C510? gearbox from the multijet II for this 'upgrade' ?

I have a 2008 multijet which would have been the 75bhp model however there was an engine failure after 3 years and just 23,000 miles when the car was owned by the previous keeper. The engine was replaced under warranty and I contacted the dealer who did the change and they confirmed that it was a 95bhp engine that they fitted as the 75bhp was no longer available. As I understand it however the clutch was not uprated nor the powertrain so either I may have issues in the future & they were just doing the absolute minimum or the ratings & tolerances will be fine.
Either way, I guess I should not do any more performance mods - I have a K&N panel filter and a free flowing exhaust already. I am very happy with performance & economy but there's always room for improvement!

alexh365 · Apr 17, 2013

Lincs500 said:
I have a 2008 multijet which would have been the 75bhp model however there was an engine failure after 3 years and just 23,000 miles when the car was owned by the previous keeper. The engine was replaced under warranty and I contacted the dealer who did the change and they confirmed that it was a 95bhp engine that they fitted as the 75bhp was no longer available. As I understand it however the clutch was not uprated nor the powertrain so either I may have issues in the future & they were just doing the absolute minimum or the ratings & tolerances will be fine.
Either way, I guess I should not do any more performance mods - I have a K&N panel filter and a free flowing exhaust already. I am very happy with performance & economy but there's always room for improvement!

Does the new engine appear as below? Surely they'd also need to replace the ECU too?

Lincs500 · Apr 17, 2013

Not exactly, the engine covers & whatever else they could save from the original engine was used on the new one but yes, the ECU was changed as I believe it is just in the mapping where the extra 20bhp is derived.

ban1111 · Apr 17, 2013

Hardly likely that the difference between the 75 and 90bhp is down to only the ecu.

grimwau · Apr 17, 2013

ban1111 said:
Hardly likely that the difference between the 75 and 90bhp is down to only the ecu.

Almost certainly correct, I'm sure when I had my 75BHP 500 and was looking to change to the 95BHP or a TA I was told that there were a few differences apart from the mapping, Injectors seem to ring a bell.

Of course, if it was a brand new engine, it might have been a full engine complete with all ancillaries, exactly as ready to go straight into a new car.

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