Does anyone know if there is an injector upgrade for the stilo jtd 115bhp model. its the last thing i would like to do to my car. any help would be great. eg bigger injectors from maybe the mjet stilo or something that will fit straight in or else maybe some nozzles that will allow more fuel to pass through.
General Stilo jtd injector upgrade???
- Thread starter Stilo170
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General Stilo jtd injector upgrade???
john55
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The injectors will be perfectly adequate for the pump / engine. It will never inject more fuel than the ECU is telling it to inject. Fuel injection is very complicated and precise on a common rail diesel. It is not just a matter of squirting the stuff in and the more the better, like petrol. There are actually several injections of fuel during each combustion (Audi are up to 5 separate squirts of fuel during the combustion.) I believe early common rail engines used 2 injections. don't know what a JTD uses though.
If you want to go faster, get a more powerful engine. Injectors have to be matched to pump/ engine capability. Find a 2.4JTD or MJET engine in a scrap yard and put that in if you want more power. Changing injectors will gain nothing and only cause lots of problems.
If you want to go faster, get a more powerful engine. Injectors have to be matched to pump/ engine capability. Find a 2.4JTD or MJET engine in a scrap yard and put that in if you want more power. Changing injectors will gain nothing and only cause lots of problems.
After changing injectors/nozzles, you'll need an ECU remap.
The question is, what nozzles to choose.
The question is, what nozzles to choose.
john55 is bang on, diesel burns completly differently to petrol, it needs the correct conditions to burn, petrol will burn in normal condition diesel wont, but under the correct conditions it explodes with a lot more force (atomised and compressed).
changing the injectors will just put more fuel into the cylinders causing more black smoke (unburned fuel) no gain in speed and just up your fuel consumption and cause your engine to coke up.
infact the best way to get more power from the diesel engine is more airflow, increase the airflow into the system and you will burn more of the fuel in the system.
have a look at tuning moduels or a re map to get more vroom from the car, injectors are not the way.
roy
changing the injectors will just put more fuel into the cylinders causing more black smoke (unburned fuel) no gain in speed and just up your fuel consumption and cause your engine to coke up.
infact the best way to get more power from the diesel engine is more airflow, increase the airflow into the system and you will burn more of the fuel in the system.
have a look at tuning moduels or a re map to get more vroom from the car, injectors are not the way.
roy
JTD injectors are individually calibrated to the ECU using the grade code numbers etched into the top of each injector. Even if you fit a new/second hand injector, it needs to be calibrated to the ECU.
Changing them for different injectors will achieve no positive results.
Changing them for different injectors will achieve no positive results.
hmm i dont agree 100%..
first off if you havnt gotten a remap or box of some sort to increese fueling then thats the first way to go otherwise if you wish a lot more power injectors and stronger fuel pump is the way to go.. but they have to be tuned in afterwards!
airflow wont do mutch for a diesel.. increasing the boost pressure from lets say 1bar to 1,4 you nearly wont feel if there isent any excess diesel in the burn!
why do you think that a chiptuner rarely increases boost when chiptuning a diesel but when on a gasoline he raises pressure and then get the fueling to fit..!
i know a company that uprates fuel injectors for the jtd and they get big gains of that..
remember that your 115hp engine also delivers more on other models!
diesel=its all about the fuel!
but more fuel means higher EGT`s.. higher EGT`s is sometimes = smoke... increase boost or water/meth injection...
you can expect to double the power if you go after something like this! and get a larger turbo! ;-)
first off if you havnt gotten a remap or box of some sort to increese fueling then thats the first way to go otherwise if you wish a lot more power injectors and stronger fuel pump is the way to go.. but they have to be tuned in afterwards!
airflow wont do mutch for a diesel.. increasing the boost pressure from lets say 1bar to 1,4 you nearly wont feel if there isent any excess diesel in the burn!
why do you think that a chiptuner rarely increases boost when chiptuning a diesel but when on a gasoline he raises pressure and then get the fueling to fit..!
i know a company that uprates fuel injectors for the jtd and they get big gains of that..
remember that your 115hp engine also delivers more on other models!
diesel=its all about the fuel!
but more fuel means higher EGT`s.. higher EGT`s is sometimes = smoke... increase boost or water/meth injection...
you can expect to double the power if you go after something like this! and get a larger turbo! ;-)
I'm no expert on injection upgrades but have read a lot and increasing flow from injectors would eventually be required after a few points have been reached.rail pressure, pump max flow rate at higher pressure,nozzle flow rate at higher pressure and injection window are all in the loop. If you max out your injection window at max flow/pressure then the only thing left is to increase nozzle/injector.but this will drop pressure and if pump not able to raise high enough for larger injector poor atomisation will occur?how much power do you want, how much you want to spend?I'm sure someones looking for 200bhp on a 8v jtd loads of other mods but prob still on original injectors will find after.
heres a good thread on injectors jtd related
http://www.alfaowner.com/Forum/tuning-and-upgrades/221913-2-4-jtd-bigger-injectors.html
and heres the guy whos hopefully around 200bhp 8v jtd
http://www.alfaowner.com/Forum/tuni...8v-jtd-turbo-upgrade-200-210hp-159-turbo.html
hope these help
http://www.alfaowner.com/Forum/tuning-and-upgrades/221913-2-4-jtd-bigger-injectors.html
and heres the guy whos hopefully around 200bhp 8v jtd
http://www.alfaowner.com/Forum/tuni...8v-jtd-turbo-upgrade-200-210hp-159-turbo.html
hope these help
