Phil99vette

iTrader: (11)

What kind of numbers are you guys seeing on the top end???
Phil

horist

last I drove my car at WOT, I was seeing upwards of 47/48 lb/s/min

stock cars are usually in the mid to low 30s

RedHardSupra

iTrader: (1)

all of these are at 6000rpm:

stock 01 with LM and lid did 35-36lb/min
my z06 cam'med car did 39lb/min
tr224 on stock headers did 35-36lb/min
same tr224 on LT's did 38lb/min
228/.575 mac mids did 41lb/min
F13 on LT's did 44lb/min
all forged huge cam 347, 90/90 with everything, 52lb/min
383 on ls6 intake did 63lb/min

and for fun: STS w/ T67Q on 4.5psi maxed out the MAF readings by 4800rpm

Phil99vette

iTrader: (11)

Here are my results....
Stock car with mods - 32-38lbs/min
Bolt on + cam = 38-41lbs/min
Head and Cam = 42-46lbs/min
Head and Cam + 90/90 = ~50lbs/min

Last night my new combo 346 H & C + 90/90 went almost 60lbs/min....59.xx
Phil

WKMCD

iTrader: (2)

Head/Cam (230-236 112 lsa XE-R)
90/90
Stock bottom

50-51 lb min.

But you know that didn't you Phil.

Built and Tuned by Phil - ProSteet MotorSports

Thanks for the beast Phil.

Josh

iTrader: (9)

How drastic an effect would elevation have on these numbers?

Josh

white2001s10

iTrader: (4)

Temperature has a huge effect on what the MAF sees as lbs/min.
Colder air is much heavier.
Knowing Lb/min values without knowing the air temp they were tested at doesn't mean a great deal.

RedHardSupra

iTrader: (1)

every 11*F changes air density 1%
there's probably a similar metric for the altitude, here's your homework, Josh

Phil99vette

iTrader: (11)

I am refering to, if memory serves me correctly, is dynamic airflow. My MAF is long gone.
Phil

bshell

iTrader: (24)

I am also running w/o a maf and am just using straight tubing from the lid to the tb (thanks to home depot motorsports!). I have seen up to 44 lb/min at the end of the track, mods are in my sig.

Phil99vette

iTrader: (11)

Last night we leaned on it alittle more and saw 59.4-59.7 lbs/min with almost 1700rpms left.
Phil

white2001s10

iTrader: (4)

I'm very confused about the idea of giving credit to a number that wasn't actually measured. Can someone clear me up on this?

MeentSS02

iTrader: (11)

Same here...

But my bolt-on only car sees 40-41 lbs when it is in the 60s outside.

Wideband, open loop SD tuned.

Phil99vette

iTrader: (11)

How is the number derived?

RedHardSupra

iTrader: (1)

it is derived, that's why it has no limits on final value, and that's a good thing
you might not believe it, but the engine does, so i would take its 'word' for the correctness of it.

Phil99vette

iTrader: (11)

So with the assumption that an engine is simply an airpump, the more air you take in the more horsepower you make? I think that there is going to be a correlation between Dynamic Air and HP.
Phil

MeentSS02

iTrader: (11)

There is definitely a correlation between this value and your engine's output, but I'd really like to know how it is derived.

I certainly wouldn't consider my car a freak by any means...and I certainly don't think my numbers mean I could run with a cammed or h/c car.

white2001s10

iTrader: (4)

I had been thinking you guys were talking of actual measured values. My own opinion of a derived value like that is that it's pretty much worthless no matter how it was derived. A derived method would have to assume too many things and would be subject to error stacking like everything else that uses multiple inputs to derive something.
That's just me thinking. I shouldn't have posted here without knowing what you were talking about.

oztrack

My 216 220 1.8 Rockers Ported Heads Clubsport does 44lb at 6600rpm in about 80 degree IAT.

silkey

just a little off topic,but could this be converted to correct injector size?