What's your mapped MAF g/s Readings

Dan-Jnr

Dan-Jnr

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At each stage of my car (07 S3) being mapped I have taken MAF readings and other logs to check my car is running as it should.

I would like others to post there MAF readings to compare.
Currently mine is Revo stage 2+ pulling 259 g/s which is roughly 335 BHP using the divide by 0.8 method.
My Revo Settings at B8 T5 F6

Mods: Pipewerx 3" downpipe, Pipewerx decat, Revo Cold Air Intake, Autotech HPFP, RS4 Fuel Vavle, Rev D Stock DV, stock Intercooler, stock catback exhaust,

207 g/s = 260 Stock
235 g/s = 305 Stage 1
249 g/s = 312 Stage 2
259 g/s = 323 Stage 2+

I would appreciate if other could post their mod list and MAF readings from a 3rd or 4th gear pull.
 
My S3 stage 2+ Revo
BCS turbo back, airtec stage 2 intercooler, Revo intake, RS4 valve
B8 T5 F5
272 g/s = 340 bhp

Emailed Revo my logs who said very healthy and would be making 360 bhp!
Lots of conflicting info regarding how accurate the .80 calculation actually is.
 
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My S3 s-tronic
APR stage 2
Milltek non res with milltek cat, GFB dv+
Forge twintake 238 g/s
ITG sealed intake 237g/s
Original airbox 250 g/s
 
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I had APR on my cupra R 2.0 tfsi 265 bhp
Great software just never found an intake it actually liked!
I went through about 3 different intakes which as you've said made it lose power or misfire high up the revs.
That's the main reason I chose Revo for the S3 (same engine) pretty much any intake works with Revo
 
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The divide by 0.8 only applies when using a stock air box as the maf scaling is usually miles out on aftermarket intakes. It gives a ball park figure, that you can use to compare different setups when modifying your vehicle. Even rolling roads can only be used as a guideline as you can see huge variation between companies and correction methods.

Stock: 162g/s = 202hp
19 psi: 200g/s = 250hp
 
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Just measured mine - 4th gear run - Shark Stg1 map

246.7g/s @ 6440rpm

/0.8 = 308.4 hp

The car made 308.9hp @ 6500rpm on RR yesterday.
 
Tom5190 said:
Just measured mine - 4th gear run - Shark Stg1 map

246.7g/s @ 6440rpm

/0.8 = 308.4 hp

The car made 308.9hp @ 6500rpm on RR yesterday.
Click to expand...
Are you running stock airbox or an intake?
The calculation is accurate on stock intakes
 
My Mk6 Golf R ( Same EA113 engine as S3 8P) currently maxes the MAF sensor reading at 5,800rpm.....364.08g/s. Using the rough 0.8 rule that equates to 455bhp at the same revs.

HTA3071GT turbo, WMI, 2bar boost.
 
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Just had a Cupra on the Dyno, 245g/s. ITG intake, 330bhp.

10475837_952133998144664_3081875102879086479_n.jpg
 
since you have flow figures and dyno figures then 245/0.75=330bhp (aprox). just a thought, maybe dividing with 0.75 gives closer figures for itg and similar intakes?
i don't have dyno figures for mine to compare, and didn't do maf logs in a long time, but if i remember correctly i've seen 260+ with itg, and with air feed even close to 270g/s.
 
Bumping this up to get more readings and results from others. Not had a get response really so would appreciate if others could please post there MAF readings from a decent pull.
 
Stage 2+ 3rd gear pull @6640 rpm 234 g/s.

Unitronic CAI

I know my numbers are on the low side. Not sure why, maybe my elevation has something to do with it
 
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Dan-Jnr said:
Bumping this up to get more readings and results from others. Not had a get response really so would appreciate if others could please post there MAF readings from a decent pull.
Click to expand...

You supply the vagcom and I'll happily give you as many logs as you'd like
 
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Got a new higher reading today of 264 g/s.
Same weather conditions, only difference is 4 new Goodyear Eagle F1's, not that tyres have made that increase.
 
You are using a REVO intake according to your OP, the maf scaling is incorrect which makes your g/s irrelevant. I saw for myself about the REVO intakes when I met with Voorhees, his car was 360hp and we logged his peak airflow, which equated to 280hp. Also, it's unlikely that you had exactly the same weather conditions on 2 different days, temperature, humidity and pressure all exactly the same?
 
To add a slightly different slant to this I'll add in my figures (somewhat similar to a stage 1 tune) via a tdi-tuning petrol tuning box.

Standard with pipercross panel filter saw 209.00 g/s so a pretty standard 261BHP
With Tuning box 248.69g/s making it 310BHP using the 0.8 rule of thumb

This was spot on with the figures is actaully made on the rollers.
 
Thought I would add the below as a reference data set from a stock car.

Standard S3 - Tesco 99

1)215.5
2)220.5
3)218.4
4)220.97
5)217.0
6)223.6

All above are from same day/time but opposite directions on the same piece of road, I was collecting the full APR log suite to check my cars health.

Was noticable how sitting idling to setup the new log configuration for VCDS created heatsoak and this lead to higher levels of timing retardation. Every odd number in the above collection was after the idling and heat soak. Every even number was the return run which did not have the idling heat soak and much less timing pull.
 
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Dan-Jnr said:
At each stage of my car (07 S3) being mapped I have taken MAF readings and other logs to check my car is running as it should.

I would like others to post there MAF readings to compare.
Currently mine is Revo stage 2+ pulling 259 g/s which is roughly 335 BHP using the divide by 0.8 method.
My Revo Settings at B8 T5 F6

Mods: Pipewerx 3" downpipe, Pipewerx decat, Revo Cold Air Intake, Autotech HPFP, RS4 Fuel Vavle, Rev D Stock DV, stock Intercooler, stock catback exhaust,

207 g/s = 260 Stock
235 g/s = 305 Stage 1
249 g/s = 312 Stage 2
259 g/s = 323 Stage 2+

I would appreciate if other could post their mod list and MAF readings from a 3rd or 4th gear pull.
Click to expand...

Dan do you have timing retardation logs from stock at all please? On what I think was a relatively cool run from the above I was seeing upto -4.5 on cyl 4 between 2000 to 3000rpm and wondering if this is normal. Other cylinders were closer to -3 in this region. I was expecting less on Tesco 99...
 
-Ju- said:
My S3 s-tronic
APR stage 2
Milltek non res with milltek cat, GFB dv+
Forge twintake 238 g/s
ITG sealed intake 237g/s
Original airbox 250 g/s
Click to expand...
Just to add to the above
Original airbox with APR by Carbonio inlet 256 g/s
 
superkarl said:
This isn't the case at all
Click to expand...

Perhaps I should have said it "usually" only applies to stock setups instead. On a stock air box the maf scaling will be bang on, but on aftermarket intakes the scaling can be way off, which makes it pointless to estimate power from the maf g/s. I have seen for myself the REVO intake maf scaling was so bad, the estimated power for a 360 hp car was only 280 hp.
 
I once logged a stock golf r. Running our premium 95 fuel (**** fuel)
And the car pulled -3 degrees on 3rd gear WOT.
PS our cars are shipped with 188kw

m1keh said:
Dan do you have timing retardation logs from stock at all please? On what I think was a relatively cool run from the above I was seeing upto -4.5 on cyl 4 between 2000 to 3000rpm and wondering if this is normal. Other cylinders were closer to -3 in this region. I was expecting less on Tesco 99...
Click to expand...
 
I would say the /0.8 rule can only be relied upon when on stock software, irrespective of intake.
It's true the maf scaling on aftermarket intakes can be way out, as i've found!
 
Flexiblemouse said:
Perhaps I should have said it "usually" only applies to stock setups instead. On a stock air box the maf scaling will be bang on, but on aftermarket intakes the scaling can be way off, which makes it pointless to estimate power from the maf g/s. I have seen for myself the REVO intake maf scaling was so bad, the estimated power for a 360 hp car was only 280 hp.
Click to expand...
How can the scaling be off?
There is no change in maf size. If the scaling of the maf were wrong the car wouldn't run properly and the fueling would be all over the place with fuel trims going crazy.
I think it's fair to say the manufacturers make the intakes with this in mind, they want it to work regardless of the map.

what a maf/hp estimation won't take into account is cooling and timing, that's where discrepancies may lie
 
superkarl said:
How can the scaling be off?
There is no change in maf size. If the scaling of the maf were wrong the car wouldn't run properly and the fueling would be all over the place with fuel trims going crazy.
I think it's fair to say the manufacturers make the intakes with this in mind, they want it to work regardless of the map.

what a maf/hp estimation won't take into account is cooling and timing, that's where discrepancies may lie
Click to expand...
I fitted an ITG sealed intake to my car, it ran fine but the maf reading peaked at 237 g/s with the ltft up at 17.
I substituted the itg maf housing for an oem B7 A4 Tfsi one and got 248 g/s and ltft's at 7 with the same intake.
So yes the aftermarket intakes aren't always scaled correctly!
 
superkarl said:
How can the scaling be off?
There is no change in maf size. If the scaling of the maf were wrong the car wouldn't run properly and the fueling would be all over the place with fuel trims going crazy.
I think it's fair to say the manufacturers make the intakes with this in mind, they want it to work regardless of the map.

what a maf/hp estimation won't take into account is cooling and timing, that's where discrepancies may lie
Click to expand...

Our cars use a combination of maf, map and O2 readings to control the afr, in my car i have fooled the map, so rely on the other two methods, with an aftermarket intake a car might rely on map and O2 instead. That's why there are multiple sensors, so in the case of one of them going bad there are others to take over. When i state that the maf scaling can be off in aftermarket intakes, i am not presenting an opinion, i am stating a fact. Also the divide by 0.8 estimation does not use temperature or timing, because they are irrelevant to the estimate.
 
I've just had my s3 8p logged for the first time after getting the tte420 installed. I was told its measuring 280 g/s during a 3rd gear pull...

It feels very strong but just wondering if anyone with more experience than me can say if this is a good result or not. Like I said it feels good which is the main thing but I'm just a bit curious in the numbers its pushing. Any feedback would be appreciated thanks...
 
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I think these numbers have to do with which intake you running (MAF housing), and not sure if altitude plays a role here.


I run a unitronic CAI and am 1200 metres above sea level.
My readings are about 265
 
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i finally got my car logged after the new tune had been installed. i few tweeks later i was told the car was flowing 280 g/s and it feels every bit as strong as that...

i'm more concerned with how it drives than the power figures and it really feels like the animal i was hoping for. i always lacked any feeling of excitement when driving the s3 but now i can quite easily scare myself which i think everyone needs to able to do when driving a performance car...

the rule of thumb appears to be gs / 0.8 which in my case is equal to 350bhp at the wheels. another google search and i found a converter to change the at wheels power to at crank power. the final result was 419bhp as shown below. it does sound rather inflated and of course i can't verify the figure but i'm going to stick with it as i think it's rather fitting that the new turbo is tte420...



no more performance upgrades planned for the near future, i'm just going to drive and enjoy. i have a few other bits to install on the car and when i get more time i will embark on getting the wmi kit installed and set up with a revised tune...
 
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Logged today after fitment of the Wagner. Revo stage 2+ settings B8 T5 F7. So my stages of tune look like this:

Stock with panel filter 209 g/s, est. @0.8 = 261bhp
As above but with tuning box 248.69g/s, est. @0.8 = 310bhp, verified on rollers
Stage 2+ with Revo intakes do Wagner intercooler 265g/s est. @0.75 = 353bhp

Seems to vaguely add up
 
guile said:
i finally got my car logged after the new tune had been installed. i few tweeks later i was told the car was flowing 280 g/s and it feels every bit as strong as that...

i'm more concerned with how it drives than the power figures and it really feels like the animal i was hoping for. i always lacked any feeling of excitement when driving the s3 but now i can quite easily scare myself which i think everyone needs to able to do when driving a performance car...

the rule of thumb appears to be gs / 0.8 which in my case is equal to 350bhp at the wheels. another google search and i found a converter to change the at wheels power to at crank power. the final result was 419bhp as shown below. it does sound rather inflated and of course i can't verify the figure but i'm going to stick with it as i think it's rather fitting that the new turbo is tte420...



no more performance upgrades planned for the near future, i'm just going to drive and enjoy. i have a few other bits to install on the car and when i get more time i will embark on getting the wmi kit installed and set up with a revised tune...
Click to expand...

0.8 trick is to give power at the crank...

What intake do you have?

What are you long term fuel trims like?
 
m1keh said:
0.8 trick is to give power at the crank...

What intake do you have?

What are you long term fuel trims like?
Click to expand...

i wasn't 100% sure i had calculated it correctly, it think it was more of the fact it spat out the numbers that i wanted to see. do you know what the correct estimated figure is please?

it's an evoms intake...

not sure about fuel trims mate as it was the tuner who gave me the 280 g/s figure when he logged the car and finalised the map...
 
guile said:
i wasn't 100% sure i had calculated it correctly, it think it was more of the fact it spat out the numbers that i wanted to see. do you know what the correct estimated figure is please?

it's an evoms intake...

not sure about fuel trims mate as it was the tuner who gave me the 280 g/s figure when he logged the car and finalised the map...
Click to expand...

280/0.8=350hp is the "correct" sum.

My standard car does 215g/s 215/0.8 = 268 - about right for standard crank HP...

The evoms intake is meant to be fairly good for LTFT and MAF readings. So either A - your tuner has played with your MAF linearisation and 280 no longer means 280. Or B you are not flowing enough air for 420...
 
thanks mate, i doubt he has played with the MAF linearisation but i'll check next time i see him...

the 420 figure was my half ***** attempt to work out the whp so i'd discard that based on my previous attempt...

i have to admit i would have liked more than 350hp considering its running a hybrid. the strange thing is it feels a lot quicker than my previous stage 2+ set up and the esp kicks in during a straight line run on a bone dry road. it never did this before so i must be pushing out more power. either way i'm happy with the performance which is the main thing i suppose...

even the tuner thought it was quick and he's running 250kw at the wheels in his r...
 
As above, 280g/s = 350hp at the crank.

If you know the weight of the car (with you in it) then you can also get a pretty good power estimate from a quarter mile terminal speed figure.
 
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