Now with Quaife installed, it could be time for some real power.
Turbo K04 upgraded 1750 TBi/ QV
Current turbo is still fine though.
Turbo K04 upgraded 1750 TBi/ QV
Current turbo is still fine though.
According to @acab, the 2011 GQV KO4 turbo should be a 100% fit on the 159 TBi - no modding of any kind.Basically, a distinction between K03 and K04 loader.
Both turbo's are basically the same in construction and also welded directly to the manifold, which is identical in both cases.
The manufacturer of the turbo can vary. Currently I know Borg Warner, 3K and IHI.
The difference between K03 and K04 is in small but fine details.
The compressor inlet on the K03 is minimally narrower than on the K04. In addition, the compressor housing is smaller, as is the exhaust housing. In addition, you can clearly see that the exhaust gas turbine is smaller in the K03 than in the K04.
Then I noticed that the K03 turbo have a blue nameplate and the K04 turbo an orange.
In addition, they can be distinguished by the part number.
K03 turbos start with the number 53 03 and K04 turbos with the number 53 04 .
It may also happen that a K04 has an imprint "K04" in the casting between the manifold and turbo flange. One of mine has it, with the other it was furbished.
Interim conclusion: Due to the identical construction and manifold, it is possible to replace the K03 in Alfa 159, Brera and Spider by a K04.
Otherwise, it would be possible in case of emergency to install a K03 loader on a Giulietta QV, which, however, results in a loss of performance, since K03 loaders are only designed for 200hp.
K03 loaders were installed in the Alfa 159, Brera and Spider and offer 200hp
K04 loaders were installed in the Giulietta and in the 4C and offer 230hp - 253hp
K03 Turbo
Year 2008 -
OEM Spare Part Number: 55224275
BW spare part number: 5303 988 0149
Power: 147KW / 200PS
Year 2010 -
OEM Spare Part Number: 55232225
BW spare part number: 5303 988 0149
Power: 147KW / 200PS
K03 Turbo JTD
Year 2014 -
OEM Spare Part Number: 55265266
BW spare part number: 5303 970 0457
Power: 155KW / 210PS
Engine: 2.2 JTD
K04 Turbo
BJ 2010 - Prototype (known for problems)
OEM part no .: 55231460
BW spare part number: 5304 950 0065
Performance: no details found
BJ 2011 - revised version of the prototype
OEM Spare Part Number: 55224276
BW spare part number: 5304 970 0090
Power: 169KW / 230PS
BJ 2012 - new version for Alfa 4C with more power
OEM part number: 55253383
BW spare part number: 5304 970 0185
Power: 186KW / 253PS
BJ 2013 - revised version for Alfa 4C and new Giulietta QV
OEM Spare Part Number: 55259115
BW spare part number: 5304 970 0185
Power: 186KW / 253PS
That's some 470-540 Nm..It is commonly thought that high torque output causes the bearings to fail on remapped cars etc. – but this simply is not the case. We have cars running 350-400lbft without issues, yet we can see low output engines (1.3 CDTI / 1.8 non-turbo etc) experience issues. It is true that the greater the power, the more heat will be generated, but a high percentage of the cars we repair are run-of-the-mill cars, which still run into gearbox issues. Essentially, doing long distances on the motorways, during which 95% of the time is spent in 6th Gear. Transfering the engines torque all the way down the input shaft, across to the 6th Gear (closest to the end on the output shaft), and then back down to the final drive put maximum load on this small top bearing.
Crazy, I personally wouldn't want to be running that high torque on gearbox which is designed for a max of 320nm but each to their own.
I don’t need to discuss that. But yes it does. I know what it does to my car, as I have it installed.The quaife won't stop wheel spin at all when it's just due to excess power....
Back to turbo discussion.How the car drives
1st gear isn't great...I don't like front wheel drive cars for this very reason. The eDiff struggles to limit wheelspin and then it sometimes just gives up and completely cuts in and the revs drops then climbs again. Second gear is much the same...wheelspin from 3000rpm to 5000rpm on smooth roads. 3rd gear is where it all comes together, it pulls HARD right through the rev range, 4th is the same and then its all smooth sailing.
I ask questions to get wiserhdvp, you talk too much
too many questions.
I have all 3 units in my workshop:
The 200 hp K03, the 230/235 hp K04 and the 241 hp K04.
The K04 has a bigger frame size, and both the turbine and compressor are significantly bigger compared to the K03.
For example the compressor is 56 vs 52 mm.
The difference between the 235 hp and 242 hp unit is small.
Looks same, but slightly bigger.Nice.It looks the same as KO3?