Math needed for gms/sec vs lbs/minute

[Redline Motorsports]

I have been crunching numbers all night with an experiment and can't seem to get gms/sec converter to lbs/minute and vice versa. What is the conversion?

Thanks

Howard

[DrX]

g/s to lb/min: multiply by .1322

lb/min to g/s: divide by .1322

g/s to lb/hr: multiply by 7.93

lb/hr to g/s: divide by 7.93

[Blacky]

Use the built in converter in EFILive's Tuning Tool.
See screenshot.

Regards
Paul

[joecar]

Use the built in converter in EFILive's Tuning Tool.
See screenshot.

Regards
PaulPaul,

Can the conversion tool also convert between AFR, EQ, Lambda...?

Cheers
Joe

[Redline Motorsports]

I figured it was right under my nose!

Since a motor ingests the most amount of air that it can at the highest VE (peak torque), why can't you evaluate lbs/minute as a tool to determine an engines peak air capacity?

Actually.............i think I just answered my own question.....................the engine is nothing more then a glorified air pump. The volume of air will be the same regardless of fuel and timing..........................

I guess if you baseline a car prior to mods and it moves 52 lbs/min and after mods its 62 lbs/min, it is going to make more power.

What happens when rescaling the MAF now........I assume the stock GM MAF calibration is acurate.

Howard

[joecar]

...I guess if you baseline a car prior to mods and it moves 52 lbs/min and after mods its 62 lbs/min, it is going to make more power...That's the key, and also the mass per cylinder (g/cyl) value will be higher.

[redhardsupra]

redline: read this, it shows you exactly how airflow is related to ve

http://redhardsupra.blogspot.com/2006/09/how-speed-density-works.html

[Blacky]

Paul,

Can the conversion tool also convert between AFR, EQ, Lambda...?

Cheers
Joe
Yes, but it would require an extra inout field to specify stoich. Usually 14.7 for gas (in most GM cals it is 14.63) but it will be different for different fuels.

But it could be easily added and would be useful.

Regards
Paul

[Trippin]

I guess if you baseline a car prior to mods and it moves 52 lbs/min and after mods its 62 lbs/min, it is going to make more power.

Howard

In most cases yes but just be careful, you could get into a situation where it moves more air and makes less power.

Typically with to much exhaust event. The combination of an early exhaust valve opening and a good flowing exhaust port could effectively blow the cylinder down to quickly and move more air through the engine, however not use any of it to push the piston down. :frown: