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Old 26-11-2017   #16
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Re: T-Jet 120hp 'Chip-tuning'

Can't complain about my mechanic and I've seen him do it, I couldn't do it any easier or faster.
Maybe it's easy in theory and easy to explain on a computer, but that oil filter really isn't positioned handy in an LPG converted Doblo T-Jet, especially the bolts that hold the covers on.
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Old 26-11-2017   #17
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Re: T-Jet 120hp 'Chip-tuning'

On the original subject, Don't bother with the plug-in "chip tuning" boxes, they just mess with the sensor signals. For similar cost get a proper remap.
Any kind of modification especially engine tuning will invlidate your warranty regardles of what your delaer says. Unless you have in in writing from Fiat's legal department (or other warranty provider) they can refuse any claim. This applies to everything, not just the modified part. I've had a garage try to refuse an ECU failure claim becuase of a typo in the mileage on a worksheet. The error was made by them and not even in the service book. Worst case your gearbox or engine has a catastrophic failure and you are left with a huge bill. If it's on a lease or finance thy may also have clauses about modifications. Then there's insurance...
In short, wait till warrnty expires, finance (if any) is paid off and then get a remap.

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Old 26-11-2017   #18
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Re: T-Jet 120hp 'Chip-tuning'

I don't know what's the law elsewhere, but I bought my Doblo at my dealer, the dealer has their details on the contract and bill as the vendor, for me my dealer provides me my warranty and I don't and shouldn't care if Fiat doesn't repay them a warranty repair.
My dealer not only approved but even recommended having my complaints sorted by Squadra tuning, with only the warranty on the clutch plate and ECU voided, so maybe my dealer should worry about the rest of the car until the warranty period is over, but I don't.
That's how the law is here.
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Old 26-11-2017   #19
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Re: T-Jet 120hp 'Chip-tuning'

Quote Originally Posted by Candisa View Post
I don't know what's the law elsewhere... my dealer should worry about the rest of the car until the warranty period is over, but I don't.
I'd say you found the only dealer out there determined on loosing money.
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Old 26-11-2017   #20
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Re: T-Jet 120hp 'Chip-tuning'

Quote Originally Posted by Candisa View Post
I don't know what's the law elsewhere, but I bought my Doblo at my dealer, the dealer has their details on the contract and bill as the vendor, for me my dealer provides me my warranty and I don't and shouldn't care if Fiat doesn't repay them a warranty repair.
My dealer not only approved but even recommended having my complaints sorted by Squadra tuning, with only the warranty on the clutch plate and ECU voided, so maybe my dealer should worry about the rest of the car until the warranty period is over, but I don't.
That's how the law is here.
Like all these things you will only find out for sure is when / if you need to claim. I hope you got it all in writing. Good luck,

Robert G8RPI.
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Old 26-11-2017   #21
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Re: T-Jet 120hp 'Chip-tuning'

Let's not go further off-topic here, I was a customer at my dealership from before I had a Fiat and there's a reason I bought a new car there. If that reason is wrong I'll see soon enough with my luck.

The message is: talk to your dealership, it's indeed probably a good idea to have in writing chiptuning isn't a problem before you do it.
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Old 28-11-2017   #22
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Re: T-Jet 120hp 'Chip-tuning'

Last Thursday got to the dealer. They don't do remapping themselves but the do it like Isabella said via Squadra Tuning. Theoretically this will end my warranty. BUT technically!!! if anything happens they wont say to Fiat that ECU files are remapped or changed. I won't get this in writing but they are pretty flexible with this...
I have better idea, please say my where i can be wrong. A small story with worst case scenario:
1. I go for remap on warranty and engine or gearbox blows (the most expensive things which can go wrong)...
2. instead of directly going to dealer service first i deliver my car to the chip tuner to put stock soft.
3. with original soft i go to the dealer and they don't see anything unusual...

if ECU block was not open and safety seal is there then dealer service can do a thing? it's a bit of safety... which can cost extra transport charges and that's it...

Another worst scenario if something happens on the foreign road where i would be forced to go to not to my dealer nor able to put original soft. then i am f'ed...

Yeah, oil and ALL filters i will change in end of december on 25k. and with 15k interval in the future for all filters except for interior filter (every 30k). Timming belt a good note. On 60k mark i will ask mechanic to check it. My warranty ends in 2019 January or 100k whatever comes first.

1&2 gears are the worst... the start is lagging, more torque there needed!!!. like kia picanto or whatever smallest cars with 0.8l engine are better in normal conditions (not drag racing just normal start). i am just embarrassed with my car because of that...

And extra torque on 4&5&6 will be beneficial in the city as well. as on a fifth 55km\h can pull it off alreaady but with extra would be nicer. 3 gear i have no complains. it goes up to 130km\h and ok accelartion from 1800rpm...
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Old 28-11-2017   #23
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Re: T-Jet 120hp 'Chip-tuning'

PS: does someone check oil temperature on highways above 140km/h? does it go above middle mark? I speak here about oil temperature and not water temperature.
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Old 28-11-2017   #24
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Re: T-Jet 120hp 'Chip-tuning'

Be careful with using too much torque at low rpm in high gear. The M32 box is notorious for failing bearings at 5th and 6th gear.
"Economy driving" kills gearboxes, you need to save a lot of fuel to earn one of those back!

At 55km/h I am cruising in 4th while my Doblo's gearbox ratios are a bit shorter than your Tipo's, and the reason Squadra is working on my 2nd and 3rd gear performance is because I always want to be in 3rd up to at least 70km/h under acceleration (now I often pull hard to 60 in my limited 2nd and shortshift to 4 because my 3rd is worthless).
I don't use 6th before 90km/h and I never accelerate in 6th.

My motto is: If I'm cruising below 90km/h and my "shift up" indicator isn't showing on the dash, I'm in a too high gear.
I cruise at 2000-2500rpm (up to 90, then I run out of gears), accelerate at minimum 2500rpm, 3000+ when I'm in a hurry.

I've driven the Tipo T-Jet, if you want torque at 55km/h you need to be in 3rd, 2nd even if you are in a hurry.
I was like you when I first had my Doblo T-Jet: I've had diesels and unblown petrols before, it doesn't behave like a rev happy unblown petrol at all so I drove it like a diesel.
In fact it's really in between. It doesn't like 5+k rpm like an NA petrol (due to tame camshafts and the tiny turbo running out of puff), but for the love of your engine and gearbox, don't diesel it either, the gearbox starts really low and has 6 gears for a reason.


Like I've said, I've driven the Tipo T-Jet, personally I didn't find it that slow despite it was a well equipped wagon, much better tuned from the factory than my Doblo for sure.

It's probably not what you want to hear, but based on my experience with Fiat and my driving impressions of the Tipo T-Jet I recommend you to wait until about a year and a half and 45k km before you chiptune it. You'll never get written approval from your dealer as this could cost them their dealership, it's up to you to decide when you'll take the risk of trusting their spoken words.
Meanwhile make a habit of driving more in the mid-rpm range and ignore the shift indicator (it's there for economy and emissions, not for performance or reliability!) instead of dieseling it.
Yes it'll consume a bit more fuel, but if you'd push more torque out of it it'll drink more as well.

Don't forget: yes it has 120hp and 200+Nm at low rpm that can be increased via chiptuning, some even modify it to squeeze well over 200hp/300Nm out of it, but it'll always be a little economy 1.4l 4 banger that's lugging a heavy car around, mated to a gearbox that doesn't have the best reputation.

Greetings from Belgium,
Isabelle
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Old 28-11-2017   #25
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Re: T-Jet 120hp 'Chip-tuning'

Quote Originally Posted by romanche View Post
Last Thursday got to the dealer. They don't do remapping themselves but the do it like Isabella said via Squadra Tuning. Theoretically this will end my warranty. BUT technically!!! if anything happens they wont say to Fiat that ECU files are remapped or changed. I won't get this in writing but they are pretty flexible with this...
I have better idea, please say my where i can be wrong. A small story with worst case scenario:
1. I go for remap on warranty and engine or gearbox blows (the most expensive things which can go wrong)...
2. instead of directly going to dealer service first i deliver my car to the chip tuner to put stock soft.
3. with original soft i go to the dealer and they don't see anything unusual...

if ECU block was not open and safety seal is there then dealer service can do a thing? it's a bit of safety... which can cost extra transport charges and that's it...

Another worst scenario if something happens on the foreign road where i would be forced to go to not to my dealer nor able to put original soft. then i am f'ed...

Yeah, oil and ALL filters i will change in end of december on 25k. and with 15k interval in the future for all filters except for interior filter (every 30k). Timming belt a good note. On 60k mark i will ask mechanic to check it. My warranty ends in 2019 January or 100k whatever comes first.

1&2 gears are the worst... the start is lagging, more torque there needed!!!. like kia picanto or whatever smallest cars with 0.8l engine are better in normal conditions (not drag racing just normal start). i am just embarrassed with my car because of that...

And extra torque on 4&5&6 will be beneficial in the city as well. as on a fifth 55km\h can pull it off alreaady but with extra would be nicer. 3 gear i have no complains. it goes up to 130km\h and ok accelartion from 1800rpm...
I can't comment on this other than to say that it sounds like conspiracy to commit fraud to me which is an offence in the UK even if the actual fraud never takes place. Getting involved in any way could make me liable to prosecution.

I'm not a lawer, but know enough to see this is questionable and not to get involved. Call me paranoid but it's too late once it happens.

Robert G8RPI.
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Old 28-11-2017   #26
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Re: T-Jet 120hp 'Chip-tuning'

That's exactly why no dealer will ever approve modifications in writing and why I had my LPG conversion, intake, boost gauge, and even side window wind deflectors fitted by the dealership that sold me the car.
That's also why I recommend giving it some time and kilometers to work out potential issues under warranty before changing anything in the ECU, and why I only remove limiters instead of also adding performance (this would be tax and insurance fraud).
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Old 28-11-2017   #27
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Re: T-Jet 120hp 'Chip-tuning'

It's not that simple: say you have a misfire... or problems with cold starts..or whatever crappy small problem... what do you do then?
Do you first remap it back to stock? then take it for diagnosis? (then they won't be able to diagnose it)
Take it to the dealer... and hope they don't check it?

What do you do if it blows up on the road somewhere? tow it to the tuner, wait for a 1-2 days until then can remap it to stock (because when things like this happen it's usually at the most inopportune time, and the tuner might be away, or have equipment problems or other things), then tow it to the dealer?


My recommendation: if you want the tune NOW just accept loosing the warranty(with a small chance of having them fix it, under warranty).
If you're not willing to loose it, then just enjoy the car, drive it like you stole it!

BTW a looser(more km) engine takes more power better/safer : has already been through numerous heating/cooling cycles (so any stresses in the metals would be normalized), any problems should have already shown up/gotten fixed, the engine has been fully broken-in/mechanical run-in ..etc
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Last edited by aurick86; 28-11-2017 at 14:08.
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Old 28-11-2017   #28
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Re: T-Jet 120hp 'Chip-tuning'

Quote Originally Posted by Candisa View Post

My motto is: If I'm cruising below 90km/h and my "shift up" indicator isn't showing on the dash, I'm in a too high gear.
I cruise at 2000-2500rpm (up to 90, then I run out of gears), accelerate at minimum 2500rpm, 3000+ when I'm in a hurry.

In fact it's really in between. It doesn't like 5+k rpm like an NA petrol (due to tame camshafts and the tiny turbo running out of puff),
I only use the 6th gear over 120km/h...and it's done 200k on without bearing replacement, 5th over 80km/k... and i try to minimize acceleration in those gears.
Just rev it more! (oil pressure will be better, more protection for the engine)

Replace the turbo with the vl36, now mine revs all the way up.. to 6.5k... nice and linear.. almost not drop in torque (i am talking about actual feeling, on the dyno graph it's evident ) BUT you do loose some of the low down torque.. mine feels basically NA until 2000rpm .. but it's so rev-happy now ... it's worth it!
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Old 28-11-2017   #29
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Re: T-Jet 120hp 'Chip-tuning'

Totally agree on that, not only oil pressure, but the water pump, alternator, aircon pump... Everything is just spinning in a much happier range, the engine also spreads the torque over more power strokes per second, and you're not trying to push all the torque you've got through a tall gear of a box that is a known weak spot just to go from a 50 to a 70/80 zone.

The 90km/h I'm mentioning is in my Doblo with shorter gearing, 90km/h in 6th is about 2400rpm and that's strictly for cruising on cruisecontrol, when I can't drive a perfect constant 90 I'm in 5th and when I need some power I go to 4th.
I can't entirely remember the ratios of the Tipo I tested, but I do remember 6th being WAY too tall for 90km/h cruising even if I wouldn't care about the mechanics and ignore everything I know about lugging the engine.
Like I said, there are 6 gears for a reason, it's not to be already in 5th at 55km/h.

I won't do the VL36 on my Doblo: Belgium is really strict when it comes to upgrades to the point it's impossible. It's really ridiculous.
F.e.: You can have an intake system that breathes through an existing vent/scoop, and you can add or open up fake air intakes in the bumper/bonnet/fenders, but you can't have an intake system breathing through a vent/scoop that wasn't originally on the car.
If it weren't for that, I'd have a TD04 on it, but the closest I'd ever get to owning a legal T-Jet here would be to get an Abarth or a Bravo 150.

But if upgrading the turbo (and camshafts) is legally an option I would definitely recommend that over chiptuning to squeeze 250Nm at diesel rpm's out of the little 1.4 and VL37.
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Old 28-11-2017   #30
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Re: T-Jet 120hp 'Chip-tuning'

You could get away with the vl36.. it's virtually identical to the stock vl37.
The only differences are:
-Internal compressor/cold side is 5mm bigger.... i had both side by side.. couldn't tell the difference.
-it says vl36 on it..
you could get around this by modifying the vl37 compressor housing to accept the vl36 compressor wheel... basically take it to a specialized turbo shop.. they can do it.
So it will look 100% stock.. only way to tell would be to actually measure a stock one and the modified one side-by-side.



You would need a tune if you change the turbo and/or cams.
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