You have something confusing going on. I was searching for some articles on fuel injection tuning back in 1999 and I found a few of them, one in particular issue 19 page 81, Electronic Engine Management Part I dated March 2, 1999, in the technical features section. When I click on it, it brings me to a much later article, issue 419 February 26, 2007 article. Why is that? Actually this happens for issue 20, and issue 21. They bring you to Issue 420, and 421. Can you explain what is going on? Can you provide me with the 1999 articles?
Where material has been republished, the original article number is updated.
I'm writing in response to Julian Edgar's "Car
Aerodynamics Have Stalled" piece. I just wanted to point out my research aimed at defeating aerodynamic
I have a ‘90 Celsior and I'm very interested in
the Digital Fuel Adjustor. I realise that it will have to go on the pre cat
oxygen sensor as the Karmen Vortex airflow meter uses a frequency signal.
Julian mentioned in one of his articles that the closed loop on his LS stayed in
longer than most before going to open circuit; just how far up the rev range was
that? 80 percent of the time I'm never over 3000 RPM so if it stayed on the oxy
sensors to around those revs, setting the DFA up on the oxy sensors would be
enough? Also how will the ECU handle the DFA only being on one of the two
pre-cat oxy sensors or do I need to use two DFA's seeing as the engine really
runs as two 4 cylinder engines? Is it possible to convert the frequency to
volts, put it through the DFA and then convert it back, as well as having
another unit on the oxy sensors? Any help would be greatly appreciated. As a
side note I will most definitely be running one of the pulse units on my power
steering !!!...Can't wait !! Julian how did you handle it when you sold
one of the best put together cars in the world? I feel "Safe" in my solid as a
rock Celsior, now you drive a micro sandwich???? Or do you just not go down that
We suggest that using the Digital Fuel Adjuster on the oxygen sensors will not be successful – we have tried it and it didn’t work. Julian Edgar has owned as many small cars as large cars.
No Return Line
Just read your article 'Boosting Injector Flow' that covers vehicles with a return fuel line. Will you be looking at vehicles with no fuel return line? eg MX5 after 2001
Modifications to airbags! This is exactly the sort of "nobody else even thinks of writing about this" stuff that keeps me subscribed. Keep up the good work.
I was reading "The Fusion Intercooler" article
and this got me thinking. It is said in the article that intercoolers
under most boost conditions (road use) simply absorb more heat like a passive
heatsink than actually pass the heat immediately on to the air (this happens
over time off-boost, as described). Also the article notes the material
property of specific heat.
Do enlighten me.
J. Nicholas Sarris
We think you’re confusing the importance of specific heat and conductivity. But in regard to radiators, millions (billions?) of cars have been built with copper radiators – but when copper was relatively cheaper and aluminium more expensive.