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MAF g/s readings for K04 owners?

S

Shapin

Passed Driver's Ed
HYDE16 said:
peak MAF values do not matter as that may indicate a spike. I still say to this day that the Unitronic true 3" design led to the best airflow readings and fuel trims.
Click to expand...

Did you compare it to the IE intake?
I really loved to see a comparison between the two.
 
John@Unitronic

John@Unitronic

Go Kart Champion
SHAPIN said:
Did you compare it to the IE intake?
I really loved to see a comparison between the two.
Click to expand...

Here's our published Superflow SF-600 Flow Bench Data Comparison. :thumbsup:

 
jeez

jeez

Ready to race!
268 g/s

HYDE16 said:
peak MAF values do not matter as that may indicate a spike. I still say to this day that the Unitronic true 3" design led to the best airflow readings and fuel trims.
Click to expand...

Yes, no one should be posting peak MAF. My K03 w/ stock intake peaked at 200 g/s but steady readings were at 189-190 g/s (~345 CFM).

K04 on an ultra mild base tune right now is ~268 g/s @ 6500 RPM (~485 CFM) (no downpipe yet, on its way...not sure if this affects anything) w/ Carbonio intake.
 
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F

FriggenT1

Banned
jeez said:
Yes, no one should be posting peak MAF. My K03 w/ stock intake peaked at 200 g/s but steady readings were at 189-190 g/s (~345 CFM).

K04 on an ultra mild base tune right now is ~268 g/s @ 6500 RPM (~485 CFM) (no downpipe yet, on its way...not sure if this affects anything) w/ Carbonio intake.
Click to expand...

Is this an AP tune?
 
jeez

jeez

Ready to race!
clover-cat said:
here is my log
APR V3.1 98RON 4th gear full throttle
298 g/s
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Nice! Out of curiosity..have you dyno'd your car? If that 298 g/s is repeatable back to back...that's impressive. And to second FriggenT's question which intake do you have? Also, is your turbo port and polished?

To clarify that, I've read that a pound of air per minute roughly equates to 10 hp. So 298 g/s = 39.42 pounds/min (according to this) = roughly 394 hp....not sure if there's much truth to that or not, but Garrett said so. Hopefully I'm not confusing volumetric air flow with mass air flow.

"As a very general rule, turbocharged gasoline engines will generate 9.5-10.5 horsepower (as measured at the flywheel) for each lb/min of airflow. So, an engine with a target peak horsepower of 400 Hp will require 36-44 lb/min of airflow to achieve that target. This is just a rough first approximation to help narrow the turbo selection options."

The conservative estimate (x9.5) puts you at~375 hp.

FriggenT said:
Is this an AP tune?
Click to expand...

Yes sir. Getting the 42DD this week, will run some more logs and re-tune from there. This tune is just so that I can drive the car with the K04, really basic. Right now my boost drops from 3100 RPM and after (3100 RPM it's at 21 PSI and at 3500 it's at 13 PSI lol)...there's lots of logging to be done.
 
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FriggenT1

Banned
298 g/s seems quite high...I haven't seen that with any k04 that I can recall...not saying it's not possible, but the intake and p&p I'm curious about.
 
C

clover-cat

New member
jeez said:
Nice! Out of curiosity..have you dyno'd your car? If that 298 g/s is repeatable back to back...that's impressive. And to second FriggenT's question which intake do you have? Also, is your turbo port and polished?

To clarify that, I've read that a pound of air per minute roughly equates to 10 hp. So 298 g/s = 39.42 pounds/min (according to this) = roughly 394 hp....not sure if there's much truth to that or not, but Garrett said so. Hopefully I'm not confusing volumetric air flow with mass air flow.

"As a very general rule, turbocharged gasoline engines will generate 9.5-10.5 horsepower (as measured at the flywheel) for each lb/min of airflow. So, an engine with a target peak horsepower of 400 Hp will require 36-44 lb/min of airflow to achieve that target. This is just a rough first approximation to help narrow the turbo selection options."

The conservative estimate (x9.5) puts you at~375 hp.
Click to expand...

I'm pretty sure it's mass air flow (G70). And I'm suprised by the 298 g/s too.
I haven't dyno'd my car.
That night I made three logs,here are the second & third logs. The second time was 2mins after the fisrt. The third time was 1min after several 100-200 tests.
The MAF can keep 295+ g/s. At 4000rpm the turbo can goes 27psi, and it can keep 21psi at 6000rpm.
Intake is APR carbonio & APR K04 turbo kit, NGK 4853，APR 3 inch full exhaust, saber FMIC, big forged aluminum alloy lube oil sump, Turbosmart wastegate, Stoptech st41 BBK, Enkei rpf1 17inch wheels and etc.
Maybe the tune version is different in different countries?
2nd

3rd
 
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C

clover-cat

New member
FriggenT said:
298 g/s seems quite high...I haven't seen that with any k04 that I can recall...not saying it's not possible, but the intake and p&p I'm curious about.
Click to expand...

I'm suprised by 298 too. Maybe the condion is superb at that night.
APR Carbonio intake, APR 3inch full exhaust.
 
F

FriggenT1

Banned
clover-cat said:
I'm suprised by 298 too. Maybe the condion is superb at that night.
APR Carbonio intake, APR 3inch full exhaust.
Click to expand...

I don't know, unless the maf is in a different place, if the air is somehow different there, altitude, etc. I've seen the EvoMS intake do the highest numbers iirc, which I believe we're 278 or so. I'm certainly not implying it cannot be done, and at 27 psi it's more possible...I just didn't think the carbonio was going to move quite that much air. I'm not expert by any means though.
 
V

vwgti2.0t

Go Kart Champion
Unless you're comparing between the same TUNE, MAF readings are not an accurate tool to gauge power.

APR K04 users see ~270-280g/s.
My car, on a GT30, sees maybe 310g/s.
The F23 car that made 400whp on Eurodyne, sees like 240g/s.

Every tune seems to read it differently for whatever reason. So if you're comparing, stick to the comparing within the same tune.
 
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