Recent content by TexanJohn

I think there are a multitude of reasons 'why' an EFI system won't always have the desired AFR (whether it is target of stoich or something different). There are problems ranging from concept (a feedback system based on a lambda sensor is always going to be at least 1 cycle behind even if...

It's been way too long since I tried to balance chemistry equations. I don't know if these guys know their stuff, but their product does seem to work (it's an EFI controller). You might find this article an interesting read. I tried to compute the A/F ratio using their math and still didn't come...

Internal Combustion Engine Is that why no one has responded? Where have all the IC engine gurus gone? :) Just curious about thoughts on the effects of heat and pressure relating to airflow into an engine. Since the engine is not static nor a 'closed system'(I am sure that I am not...

Nobody. :frown: Let me ask the question this way: :) What if I had a long tube, and I was pushing/pulling air through this tube. Assume that there are signifcant temperature differences along the tube: 100* -20* 50*...

Anyone have a thought? :)

How would you estimate the charge density (air actually entering the cylinder) in an ICE? Assume the outside is standard pressure and temperature of 15*C (60* F) and 101.3kPa (14.7psi). At high airflow speeds (Wide Open Throttle), pressure in the manifold should approximate atmospheric...

Excellent starting point! :) I am all about 'free'. :biggrin:

Thanks. I have been reading some definitions of weather terms. I have always used this http://wahiduddin.net/calc/calc_da.htm" . Using the calculator above, I enter: Altitude = 0 Air Temp = 58.7 Altimeter = 29.921 Dew Point = 0 (I don't know if this is a reasonable value) The...

I agree that most individuals in the program will have a BS in an engineering discipline. I did contact the program director, and he indicated a BS would not be required. However, he did recommend one course each in thermodynamics, fluid mechanics, and heat transfer. He also recommended six to...

That is definitely my plan. Just wondering if there were some entry-level books that you guys might recommend.

Is the calculation for total density including humidity something like: D = [ Pd / (Rd * T)] + [Pv / (Rv * T)] Pd - pressure dry air (Pascals) Pd - pressure water vapor (Pascals) Rd - gas constant for dry air ~ 287.05 (J/kg*K) Rv - gas constant for water vapor ~ 461.495 (J/kg*K) I...

I need some direction. I am simply a poser. :) I have a BA and MBA, but now wish I had studied something different (particularly ME). I am a die-hard automotive performance enthusiast. I have Heywood's book as well as Taylor's 2 volumes. I even attended Heywood's week long class on IC...

IMO, there are no 'good' books that combine a summary/medium level of the physics and engineering and the performance aspects. Heywood's book is all about the fundamentals which are important. I am not a ME, but I would like to be. I went to a week long class this summer at MIT taught by Heywood...

Sounds good. I would like to know more about the application and the data you log (if you get any pressure analysis data). If possible. :) I am not for sure what you mean about an experimental counterpart to SmartFire, so I would have to say 'No'. I believe OEM's will be looking at this...

FYI, the sodium filled valves on the LS6 engine are lighter than the non-sodium filled valves. Stainless steel, titanium, nickel based alloys (Inconel), are all common in the performance aftermarket. http://www.ferrea.com/products.php http://www.delwestusa.com/manufactured/