Quote:
Originally Posted by COcyclist
Arragonis, are you suggesting the improved mpg is just the result of the flash too?
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In this case, yes.
The wine is in my garage (aka wine cellar
) waiting to be shipped - its not an "expensive" bottle (Lindemans 2010 Chardonnay) but I am willing to put my money (and bragging rights) where my keyboard is. This is for road cars only.
I am no engineer and am willing to be proved wrong. Only once though, not everyone gets wine - only Julian or the 1st proof maker
Quote:
Originally Posted by COcyclist
I have been studying up on diesels and everything suggests that turbo-diesels do best with free flowing intake and exhaust. This is at odds with Julian's findings though.
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My belief is that this engine (TDI 105 I think) has
all the air it needs. There is nothing to be gained by the intake or exhaust mods.
For example are there A-B-A MAP (Manifold Absolute Pressure) readings to record any additional air actually reaching the engine ? I would hypothesise that there would be none.
Quote:
Originally Posted by COcyclist
I hacked off my muffler a few years ago and replaced it with a 2 1/2" straight pipe. I cannot say that it changed the power at all but it certainly didn't hurt my highway mpg.
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It didn't hurt but did it help ? I think you are in the same boat as this car - your car has all the air it can take. If you want more MPG it will come from technique. If you want power it will come from a remap.
A bit of background here. When I was young and daft (aka long ago for the former and last week for the latter
) I "tuned" an old school IDI turbo diesel in the form of a Peugeot 306 brand new company supplied car. The classic technique was to "adjust" (i.e. enrichen) the fuel pump until the the smoke appeared and then go "half a turn" back, but only if it was the Bosch pump. If it was Lucas you were out of luck.
It worked, my 306 XRDT was much faster but didn't use noticeably more fuel. I have no idea about how long it lasted because I left that job when it had 70K on the clock and it was still fine then and the dealer had serviced it at least 5-6 times without noticing.