The velocity of the induction charge makes it not only unlikely but improbable that there would be any accumulation on the surfaces worth mentioning. When you start talking about 150 g/sec of air on the low end it is unlikely that a few percent by mass of water will accumulate in the induction...
Alternatively if I could rewrite the VQ table in my example above could I apply a factor of 2.136 to the existing air flow values based on voltage inputs as a recalibration of the VQ table to my new pipe size?
Ed.
www.turboice.net
That is a very informative post on the functioning of ECUs that are primarily MAF driven for fueling and the MAF themselves. While I knew a good deal of it already it will be a good source for me to fill in the gaps and it is complete and comprehensive rather than dispersed.
However, and I may...
I have done some data logging of a Denso MAF sensor comparing the voltage signal and the ECU's interpretation of airflow to that voltage signal. The function appears to exponential or log. Does anyone know a good source for sensor specs in different pipe sizes or a way I could estimate the...
I am admitedly not as familar with this as I would like to be but here is a couple documents on the topic:
http://www.damek.kth.se/~borje/Artiklar/SAE%20982476.pdf
http://www.damek.kth.se/~borje/Artiklar/SAE%201999-01-3505.pdf
My real interest in both of these papers is whether or not EGR is...
Just to clarify everyone I have contacted about this agrees there would be an error unless the sensor reader was calibrated against a gas analyzer - but they also can not estimate for me what the error would be again unless compared against a gas analyzer.
Ed.
www.turboice.net
I agree it doesn't change AFR - however the bosch wide band sensor is a lambda sensor and it is affected by partial pressures. The introduction of additional steam will dilute the partial pressures it senses. In effect the addtional steam will make the sensor think the mix is closer to 1.0 and...
I have no evidence of this but my other concern besides the lower mass of today's blades is their balance. If you have ever seen a turbo balanced you know that at 20,000 rpm very small changes in mass can alter it. I would be concerned that any inconsistency in the spread of the liquid mass...
Aviat - the benefits in tuning performance automotive engines is very similar. Knock is a very large problem for forced induction and high compression normally aspirated engines. The OEM solution is usually to throw fuel at the problem - which first is a very inefficient coolant low specific...
At 12:1 CR water injection I found makes a big difference on with high compression N/A on load.
From a direct causal effect - water injection is solely for suppression of knock.
The following is predicated on an properly implemented water injection system.
The great part of WI is the freedom...
Thank you Robert Schrader has been very kind and thorough in taking the time to respond and though not a specific definitive answer certainly has increased my understanding. As soon as I can absorb it sufficiently to summarize my understanding of his response I will post those thoughts.
Ed.
...they are all designed that given an average coolant mixture and the OEM system pressure that the coolant would be unlikely to reach over say 230*F at the cylinder wall.
There are waterless coolants that do not boil/vaporize even in a pressureless system. These have been successfully run in...
I called Bosch and posed this question a while ago. The tech said it was interesting and since he didn't have an answer he would make sure they come up with one and get back to me in a few days. Not one to nag it has been a few months now.
Anyway to the question:
What would the expected...
I found this link helpful when I was looking into understanding what the ECU was "listening" to on my WRX. Someone on a WRX board gave it to me:
http://home.netcom.com/~bsundahl/knock/sound/KnockSounds.htm
And best of all to listen into the secret conversations being had...
...water actually speeds this reaction which also happens to be when as much of two thirds of the energy from carbon combustion is released.
* Sources: Bob Harris note on DIY_EFI thread http://not2fast.wryday.com/thermo/water_injection/water_chemistry.txt and the reference within his note to...
Of course above I meant that excess hydrocarbons inhibit the oxidation of CO not CO2 when I first mention it.
Also in reference to another earlier question I think weak dilutions of H2O2 have been tried based on what I heard but can't find a study. I also think the conclusion was to the extent...
...reaction scheme. The conversion to CO2 is retarded until all the original fuel and intermediate hydrocarbon fragments have been consumed."
*Combustion, Third Edition, Glassman, p. 76
While water injection provides additional reactants for Glassman's wet method of CO oxidation. Through...
glueontop:
Yes the laws are poven and hold in the controlled conditions in which they describe. I don't have a NASA budget so my cars have to operate in the real world where the conditions that predicate the laws rarely exist. In that case I trust empirical results and then seek explanations...
