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Diesel Engine Fine Tuning

8K views 8 replies 3 participants last post by  Flunx 
#1 ·
I´m opening this thread to all Stelvio Diesel owners that want to extract a little more juice of the 2.2 JTD.

Feel free to share doubts or results. And of course the "journey" of all your work on it.

Cheers, Flavio

#DieselIsNotDead :devil
 
#2 ·
I´m thinking.. for a start... trade the OEM exhaust system to a Ragazzon.
My doubt is with bigger diameter pipe and without any rear silencer.. will lose backpressure.. and be worse.. with it.
It would be interresting to have a before and after dyno test.

Flavio :)

https://www.ragazzon.com/eng/ragazzon-catalogue.php?cst=6&mdl=374&cld=1326



55.0580.00
2nd stainless steel cat replacement pipe group N
Oversized exhaust pipe diameter 70 mm


601004180


50.0771.40
Stainless steel rear silencer for original aesthetic tail pipes
Oversized exhaust pipe diameter 70 mm
Not compatible for cars with Ad-Blue



 
#5 ·
Now I will ask to my Alfa Dealer "Motor Village Lisbon" to check some parts to see if there is diference between 180hp and 210hp.
Like: Pistons, Head gasket, Cranks, Crankshaft, Head cilinder, Intercoolers, Turbo, Inlet manifold, injector... etc

eheheheheh not just "increase" debt in injector and "more" air... and be a "octopuss or cuttlefish" and spray some black smoke on the run.
 
#6 ·
You don't need back pressure for turbo car :)


Also with that system you still have your DPF which kills most of the sound and adds back pressure. So even if you don't have any rear silencer the car will still be quite as you also have a VNT turbo which also kills the sound.


Maybe we should consider removing the DPF with a pipe... better for the engine as well.


About the differences between the 180...210 will look deep into that one. already found some but need to look in the details
 
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#7 ·
@KGB...
Lets continue to talk...

I will share here also the same info.

After some research I found that between the Diesel version 210hp and 180hp.

There is some difference. See Part-numbers

Turbo - 55278618 vs. 55279544
Intercooler - 50533819 vs. 50534301
Injectores - 55260836 (are the same in both cars)
Pistons - don´t have final info yet
Crank - 55277649 (are the same in both cars)
Crankshaft - 73503942 (are the same in both cars)
Headgasket - 55279536 (are the same in both cars)
Cilinder head - 73503854 vs. 71779388
Inlet manifold - 55281227 (are the same in both cars)
EGR - 55283264 (are the same in both cars)
 
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