Recent content by ISX

You are correct. As long as the pump has fuel in it, it would work, but given the setup of having a supply pump, I'd like to know the pressure it needs to maintain in order to supply 2gpm or whatever it was through that 1/4" fitting. The supply pumps performance is not my concern. It could be...

Alright I'll explain exactly what I'm doing without using all these examples. I have a diesel truck and it has an injection pump. It shoots off a set amount of fuel, say 1000 cubic mm's of fuel per injection. There's 6 barrels/plungers in this pump and they each fire when it's their turn in...

That's the problem. It is a supply pump feeding another pump which means it has a constant pressure for the most part. It is basically the same as having your water heater at your house.. So the city water is 80psi but my shower head flows 1GPM. I realize there is a pressure drop between the...

I built a spreadsheet to determine the flow and everything through a pump. I won't get involved with the first part just assume it to be correct and the gallon per hour/minute calculations are correct...

I have a nokia N8 cell phone and it is very precise about what it will allow to charge it. Mostly it will only accept wall chargers, not car power in any way. There is no way it knows the car charger isn't in the wall so all I can guess is the power is "dirty" and therefore it denies it. My...

I didn't take fuel into account at all. I have enough trouble figuring out how to calculate it all without the fuel..

Using the Ideal Gas Law I end up with the same CFM going into the engine as going out. However, putting in the different air temperatures mean the pressure going out is much higher. Does this sound right? I am assuming nothing about injected fuel, etc, just incoming 100F air and outgoing...

Average temp of the gas flowing out of the engine. With that temp you can do all the flow calculations I assume. How does the number of moles change? I realize the diesel adds some but does it add a significant amount?

I mean up to this point I know how it all works before fuel is injected. I can get the engine flow and everything, but if you inject and ignite fuel, I don't know how to calculate how much heat is added and how much flow results or is the exhaust temp all that matters? Actually, when fuel is...

I need more specifics. I'm slow..

Is there a way you can calculate exhaust flow using intake flow and exhaust temp? Maybe I would need fuel quantity as well. I just need a rough idea.. It's for on a diesel.

I am looking for the principles behind it. Effective compression ratio is like the engines in the original example. Engine A has 18:1 and engine B has lower compression but the boost brings the TDC compression pressure to the same pressure as engine A, effectively making it seem to have an...

They specifically said on petrol forums that having one engine with one compression ratio and the same engine with lower CR but more boost which matches effective compression, would have about the same power. So that would mean the thermal efficiency alone on the high compression engine can...

I did not ask what supercharging does and I did not ask about temperature of ignition. I asked about the truth between effective compression vs. air density, because different forums are saying one is better than the other and contradicting each other. And this is on a CI engine so I don't...

I have been searching for hours and have conflicting data. Basically if engine A has 18:1 CR and 0psi boost and engine B has 13:1 CR and 8.5psi boost, the pressure at TDC-Compression is the same or rather the "effective CR" is the same. However, engine A is 16.7% hotter at TDC but has 43.7%...