As the title says, and at what RPM.

 

That's kind of a funny question isn't it?
Volumetric efficiency will vary at all RPMs. Not to mention you need some sort of formula. Like air temp, density, humidity as well as head design, intake exhaust etc etc. All volumetric efficiency is, is the amount of air an engine can move per cycle. Like a gs-r at 1797 cc will move 1797cc of air per stroke if running at 100%. That's not gonna happen though. Not unless it's a damn well built motor. At the upper rpm range a stock gsr probably has a volumetric efficiency of somewhere near 85% on a very nice day.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sack Master &raquo;</TD></TR><TR><TD CLASS="quote">That's kind of a funny question isn't it?
Volumetric efficiency will vary at all RPMs. Not to mention you need some sort of formula. Like air temp, density, humidity as well as head design, intake exhaust etc etc. All volumetric efficiency is, is the amount of air an engine can move per cycle. Like a gs-r at 1797 cc will move 1797cc of air per stroke if running at 100%. That's not gonna happen though. Not unless it's a damn well built motor. At the upper rpm range a stock gsr probably has a volumetric efficiency of somewhere near 85% on a very nice day.</TD></TR></TABLE>

I should have been more clear, I am looking for the peak volumetric efficiency percent. As for what kind of numbers it should be, the h22 has a VE% of 102% at 7000rpm and the f20c (s2000) has a peak VE% of 112% at just over 8000 rpm. Aparently all VTEC motor are around these numbers but I am looking for the specific numbers for the JDM 94-95 GSR. I got this info from http://autospeed.drive.com.au/...=1127


Modified by NitrousB.I.G. at 1:52 AM 3/27/2006

 

You probably aren't gonna find your answer here. At least not in the integra forum. I'd love to be able to tell you the answer. But I don't know.

As for an s2000 running at 112%. That seems a little high especially since well engineered race motors usually only hit around 110-120%. I'm guessing that means there is virtually no room for improvement with simple bolt ons. But I guess that is also proof of how well engineered honda motors are.

Why do you ask this? Seems like an oddball question to me.

 

hmmmm how can it be higher then 100%...i dont quite understand.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sleepy_Red_hatch &raquo;</TD></TR><TR><TD CLASS="quote">hmmmm how can it be higher then 100%...i dont quite understand.</TD></TR></TABLE>

The momentum of the intake charge compresses the gasses in the cylinder slightly. I think there is an acoustic component as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">

The momentum of the intake charge compresses the gasses in the cylinder slightly. I think there is an acoustic component as well.</TD></TR></TABLE>

*slightly* i think 12% over 0 psi max capacity is more then slighly but at least i understand the concept now

 

I think that with the valve timing and over lap that VTEC offers is part of the reason why it can be more than 100%.

I just had a thought. I wonder what kind of numbers an F1 engine puts out. For their displacement they pump out huge HP and must have unreal VE%.

 

Do they even calculate VE in a forced induction vehicle? A turbo or supercharger makes up for all the engines inefficiencies. No matter what it is it is a hell of alot more than 100%. I would gather approx. 29~30psi(2 bar) would equate to about 300% on a well tuned/built motor. But I may be totally wrong though.