Since the turbo upgrade topic is getting a bit long, I made a new topic.
After months of searching the internet and quite some waiting, its finally here:
My brand new JTDm 2.4 20v turbo, the awesome Garrett GTB2056v.
I'm going to build it on a 147 JTD 16v. (I still have to purchase the car as I own a 147 JTD 8v at the moment )
I'm probably the first to post some detail pics of this turbo @ the i-net:
Vane cartridge attached to the CHRA for less heat transfer. And of course it allows more easier clocking of the turbine housing.
Here you can see the vanes surrounding the turbine wheel:
And here next to the OEM 16v turbo:
Turbine side, here it's clearly the GTB outside turbine dimensions are not dramatically big. It's quite a bit smaller than the GT2256v (175hp) unit. But yet much more potent.
And of course some wheel specs:
Compressor ind./exd. : 39.6mm/56mm (similair to GT2256v)
Turbine exd./ind. : 43mm/47mm
Can't wait to get this one installed... I'm aiming for 250 HP and 450 Nm
Good info there CS, where did you get this info from??
I thought the boxes were only good for about 420Nm with or without the diff, 480Nm with the Q2 is good to know, maybe I won't get the torque limited when I go for mapping now.
got this from a dutch guy who tunes track cars for a living (mechanical), including diesels... he has a 156 2.4 JTD that started with 136 bhp aswell... he'll be going over 240 bhp now...
P.S. Regarding to cc/mg question, EDC15 techdoc from Bosch (Funktionsbeschreibung EDC15+ P12 - VG2) states that all injection qty values used in ECU are in mg/stroke units. And the same iq numbers I'm requesting in ECU I'm also reading in FES. So I would really wonder if they are converted into cc.
Btw. reached injection of 99mg/i with stock CF3 8V injectors. Still wonder how far will be fuel pump capable to deliver sufficient flow (reached @3250rpm).
I think it is not "right way" to guess power numbers from fuel... It depends heavily on how much backpressure the turbo is making in this situation.
Yan-ko with 3 bars and 1570mg/inj it looks like you still have over 90% VE @3200rpm (I presumed that intake temperature was not over 20°C since it is very cold outside at the moment), thats very good IMO...
@ JS KTD, where did you buy the GTB2056V from? Cost? As far as im aware this is the turbo on the 210bhp brera 2.4..... My car has the Borg Warner turbo (200bhp). So theoretically i should be able to buy and fit this without any further modifications (i already have remapped to 250bhp)......
Thanks for the link! Before i rush ahead and buy this, doesnt the 200bhp 2.4 have a completely different ecu (in hardware terms?) i.e is it simply a case of remapping the current ecu? Won't the 2 engine specs be different? Sorry for so many questions, its just its quite a lot of money..... Do you know of anyone who can do this/has done this?
Mechanically it's plug and play.
Both turboes are vacuum operated and since the ECU controls it with a desired-actual pressure strategy, differences will be compensated.
But, of course the only way to take full benefit of the turbo is having your ECU remapped again.
About those fuel numbers, in Alfa ECUs they are actually mm^3, not mg.
So 90 mm^3 equals about 76 mg which is about 400Nm on a 4-cyl engine at 2000-2500 rpm.
VAG group ECUs are one of the few to actually have mg as fuel unit.
Which diagnostic software/interohase are you guys useing? Has anyone experience of Bosch KTS, how well it shows fueling and boost values?
That is a bit funny map, 2.4 JTDm looks much better.
My 76mg maybe a bit overdose, in VW 2.0 PD engine about 70mg gives 100Nm/cyl, tested many times on the dyno.
It's of course different dose in every engine that gives 100Nm/cyl.
The 2.0ts flywheel fit on the 1.9 JTS, combine that with a GTA clutch and you should be fine.
All you have to do is get the bolt patters on the flywheel changed so that the GTA pressure plate will fit
JS JTD, thanks! You got nice pics of the GTB2056V.
Could you measure the diameter of the bowl around the turbine wheel? Please take out the 'piston rings' and measure there what is the smallest diameter.
Someone would like to put larger turbine to the GTB2056V .
About compressor, is the wheel with separate nut or is the wheel threaded?
Your turbo is mirrored compaired to the other Alfa ones.
Compressor is at the right side, in your case it's left.
I have used exactly that upper CDti 8v turbo on my 147, by cutting the turbine and rotating it 180 degrees to fit my manifold.
Welding mild steel to cast iron is no problem if the welding is done properly with high nickel content sticks.
So the other way around, Alfa turbo on your CDti should also be possible. But you need a reworked or fully custom exhaust manifold.
First of all, I appreciate your efforts in making the 1.9 diesel engine more powerful. I want to do the same with mine.
Here is my problem: I have a 1.9 CDTi diesel engine on my Opel Astra. It is equivalent to the 1.9 JTDm that can be found on Alfa 159. My turbo is GT1949MV from Garrett. This turbo comes welded together with the exhaust manifold. Here are some photos:
From what I understand, cutting the manifold and welding the adapter for the new turbo is not an option because it will not stand for much time (two different materials that behave differently under heavy temperature changes). I am stuck in finding a solution on how to fit the new turbo. From what I understand the GTB2056V is the best for this 16V JTDm engine (150 HP stock). But how can I get it to fit and have no problems with it?
Opel does not have exhaust manifolds for this engine that do not come welded together with the turbo. Does Alfa have such stand alone manifolds? If they do, can you please provide the model of engine that does have such a manifold, so I can buy it and get on with the project? Some photos to compare to my turbo would be great (sometimes they move some screws around between opel and alfa or saab and when you try to fit it it doesn't...).
Another question: what is the difference between GTB2056V and 2056VK? I found at a very good price one new GTB2056V (no "K" I'm afraid ) - is it any good?
At the moment I have EDS software that gives me 201 HP and 433 Nm of torque. I aim at about 230 - 240 HP with the new turbo, new FMIC and 63" exhaust.
All 1.9 JTD 147/156/GT models have standalone exhaust manifold. But I'm absolutely unsure about the bolt pattern.
AFAIK "K" in GTB2056VK means version with electronicaly actuated VNT instead of vacuum one. May be you've seen either "L", which stands for water cooled CHRA.
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