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Old 01-12-2012, 01:33 AM   #34 (permalink)
UFO
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Join Date: Sep 2010
Location: Denver, CO
Posts: 1,300

Colorado - '17 Chevrolet Colorado 4x4 LT
90 day: 23.07 mpg (US)
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Quote:
Originally Posted by mwebb View Post
reduced MAF signal will result in
less fuel to the system , greater FE , leaner mixture or same mixture when EGR is active , just less of it .

EGR operation reduces MAF flow

EGR functions by DISPLACING area in the combustion chamber with an inert gas
exhaust ,
thereby
reducing the available engine displacement volume and combustion pressure during the time EGR is in operation

how do you suppose eliminating EGR will increase FE in your system ? theory says no .
EGR reduces NOx by decreasing combustion temperature, which has the side effect of decreasing thermal efficiency. By disabling that system, I am increasing the engine's ability to extract work from the fuel. THAT'S the theory, and I hope to have some measure of data to support it soon. To which "theory" are you referring?

Quote:
Originally Posted by mwebb View Post

the ALH engine does have intake restriction via a throttle valve to enhance EGR flow and
to shut the engine off when key is switched to
off
a 2001 beetle would have an ALH engine ?
It's only used to shut off the engine, it is not used as part of the EGR system
Quote:
Originally Posted by mwebb View Post
i also have VCDS
and use it daily - today it is version 11.1- i also use the actual VW scan tools ,
imho you should register your VC software as there are many additional things that will be made available ....
The freeware version IS the actual VW tool. Not sure what you mean.
Quote:
Originally Posted by mwebb View Post
i would not use any software to tamper with the Mother VW settings in engine management .
Why not? And who is doing that? I use the VAG-COM to validate the performance of my mod.
Quote:
Originally Posted by mwebb View Post
do not use bio diesel , ever , in any VW diesel engine , another subject .
Indeed, it might reduce your fuel costs, your carbon footprint, your emissions, increase your fuel mileage, your engine reliability. Don't do it.

Honestly, if you are going to criticize what I am doing, at least bring some facts or data.
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