How air goes thru your engine.....(basic)

I'm doing a little bit of research now. At the moment, I think the runners are designed primarily to accommodate the air flow bounce back that occurs when the intake valve closes. I'm always open to being wrong(I did agree to get married) If you have any sources, I would love to read them.

I agree.

I know you know, I just thought it was a good thing to point out the difference in the air flows through a S/C vs. T/C engine.

Seems like a good idea to me...

Actually, most manufacturers do that, just not to that extent. Look up the EGR valve.

 

They are for that. BUT, if the air flow is turbulant, the pulses wont be able to be as easily tuned, if at all. One of the reasons manufactures have switched from cast aluminum intake manifolds to injection molded plastic ones (other than it IS less expensive), is that the runners can be made smoother, creating less turbulence. if you look closely at the bends in a modern intake, you will see that they are a little flatter than the straight parts of the intake. This is to avoid the tubulence formed when air goes around a turn. The air tward the "out side", if you will, of the bend is going to accelerate faster than the air tward the inside of the bend, thus causeing turbulence in the stream. By flattening it, all the air (more or less) maintains the same velocity. This same thing can be used in the exhaust, as bends in the pipe cause turbulence, and slow down the exhaust gasses. Seems only 1 company has done this with FANTASTIC results, but there is a patent on it. http://www.micronexhaust.com/store/prodserpent.htm

 

Whats wrong with that?

 

I guess this all goes back to treating laminar and turbulent as absolute terms. Me saying it isn't laminar and Chris saying it is, we might be saying the same things. My definition of laminar is that there is no turbulence. I'm thinking Chris's definition is that it is mostly smooth flow. (correct?)

I understand what and why you have said about the laminar flow-that laminar flow makes the intake pulses easier to predict and calculate. I see that testing is really the only way to accurately and efficiently design an intake manifold.

I disagree that the design of intake runners is to increase laminar flow. I believe that the design of the runners is largely defined by the desired power band.

 

are you trying to say that you don't sniff your own farts???

yeah!

 

You have to smell the "exhaust". Good indication of your tuning.

 

Well.....ok. being as the air stream will never be 100% laminar.

Originally, yes. Not long ago, manufactures started useing them (designing) to also smooth the air flow into the combustion chamber.

 

OK. Good to know. I concede.

 

Correct! that would be your FSR (Fart Smell Ratio). Poor tuning is noticed when checking the FSR you find a bit of S (shit) comming out of the pipe when testing for the FSR. This would lead to a FS/SR (Fart Smell/Shit Ratio), in which case, changeing your diet may be in order.....or seeing a Dr.

 

Me too.. My head hurts, and I cant get ahold of any of my friends to help me out.

 

.....making a Throttle Body Spacer (TBS) nothing more than a $40ish trinket.

 

Yepo! TBS does hold paper down VERY well, however.

 

Ty, Sir!