truman
Top Post Dawg
For some short mileage run comparisons, which measuring blocks in VCDS would be helpful?
That makes perfect sense, since European NOx standards are more lax than in the United States (more advanced injection timing increases combustion pressure and temperature (and performance), thus creating more oxides of nitrogen). I for a long time thought our TDIs ran sub-optimal injection timing. I do hope chip tuning advances the timing some during operation, more towards optimal.There's no way to adjust the timing wheel or the sensor. ECU is the only way. Off topic but non USA ECU's exhibit more advanced SOI (start of injection)
Thats the number I was talking about. The lower one.Below the box it is written 0,5. What do you make of it?
Yes. this is probably the case.If the entry on the label is indeed torsion value I would guess that the value was read on factory diagnostics when the motor was test run and the operator simply entered the recorded value onto the sticker. This would then have allowed to them to sign off that stage.If the value was outside of tolerances it would have been reset and the operator only wrote in the value he reset it to. I like the idea that it was 'optimised' on high resolution kit but doubt it.
That's how many miles (100,000X) you can go before you need to replace the cam.Mine is the same. I wonder what the number in the box means?
There is a continual stackup of tolerances, in EVERYTHING:There must be a normal amount of play in the tools and lock points, which create a variance among engines.
Cam centerlines.There is a continual stackup of tolerances, in EVERYTHING:
Cam lobe center lines
Cam lobe height
Lifter height
Lifter pump-up / pump-down differences
Valve stem length
Piston top-to-wrist-pin height
Connecting rod lengths
Rod journal center line to crank center line
Crankshaft rod journal angle to timing belt keyway
And THEN, you add in the tolerances of the lockdown tools
And more, that I can't think of, right now.
All of these can be managed in the manufacturing process, but they will all still stack up. That is why software needs to be able to compensate.
Tony