http://www.youtube.com/watch?v=VSVFwKlp3Os
That car seems to have no re/mapping after having heavy fueling mods carried out
That car seems to have no re/mapping after having heavy fueling mods carried out
Very very low smoke!! The car has dbilas dynamics regrind camshaft that reduce a lot the smoke and then there is also a 2260V at 2.1 barClaudio- FR - thanks for your input but 44 degree duration is very high. Must be VERY smokey as when i had "only" 40 degree the smoke was embarrassing to the point i didnt want to WOT when someone was behind me.
Jabba are respect tuner in the UK for VAG and their workmanship is very good so I do not see them releasing a car on the uk that looks like this for eg:
http://www.youtube.com/watch?v=VSVFwKlp3Os
If you want to learn why its bad to run such high duration read this http://forums.tdiclub.com/showthread.php?t=266791&highlight=520cc
Post 3 says it all really.
No, i can confirm that this car HAS remapping.
With 39 degrees duration you are just exceeding effective injection window by far.
If you have "big balls" you can set start of injection to 27-30 degrees which will have great effect to peak cylinder preesure, stressing the head gasket...
Now, lets take the case that your tuner has set the SOI (If even touched....) to 27 degrees, then, with 39 degrees of duration you inject up to 12 degreees PTDC.
These 12 degrees are way to long, at this point the piston is on its way down already, loosing compression rapidly, so all that fuel what comes in is kind of useless in terms of power, it will almost only create heat and even more stress to your engine/turbocharger and make the tune smokey.
If you look at efficiency of combustion process, you will come to the summary, that injecting longer than 5-5.5 degrees PTDC is useless for combustion.
You may take a look at mappings from 150hp ARL TDI and compare to the mapping of 160hp BPX/BUK TDI and see what OEM engineers have done to get "only" 10hp more out of identic injectors.
And, as a second, you can also proof this by doing runs with your car while taking the time.
Make sure to have identic enviromental conditions, and do runs with both durations,try longer duration than 5 degrees, you will see that you wont be reasonable faster with the "extra fuel" you inject in comparison to when you end at 5 degrees....
Regards, Alex
Anyone know what the lift profile versus rotation angle for the pd injector cam lobes is as that would have to be a limiting factor?BTW , I have seen a PD doing 46º duration last week I love the tuners over here always amazing me.. never thought 46 was possible lol
X2Anyone know what the lift profile versus rotation angle for the pd injector cam lobes is as that would have to be a limiting factor?
In portugal they seem to have never ending cam lobes if they still believe to make useable power with 47° of duration and little to none (sometimes even in the wrong direction) adjusted start fo injectionAnyone know what the lift profile versus rotation angle for the pd injector cam lobes is as that would have to be a limiting factor?
I am keeping an eye on the head gasket - if it starts to go, I'll put PD160 head bolts in and a fresh gasket.I wonder how long your head gasket's gonna last...
Ash
The plan is definitely to go with bigger nozzles. The problem is that they are hard to find in South Africa and extremely expensive to import. What are good places to buy from?I would def invest in injectors and run around 2 bar boost with more normal SOI, like 27 deg at 4k rpm with 35-36 deg duraton max
depending what RPM you are asking for itYeah 30 degrees is a lot. Hope you have strong head bolts
28.5 degrees at 4000True. I'm assuming 4000rpm.