I decided to experiment with this one.

Booted it in 3rd gear to redline. Outside air was 22C, Intake temp showing at 27C.

Max MAF reading I got was 163g/s x 1.25 =203.75 bhp

Max boost was 1.17bar-1.18bar

car is Factory Standard on 205/40R17 boots. Had Air filter replaced with OEM one recently.

 

I'd be very much interested in the above figures from anybody who can produce them. It'd be best if people had their cars RR'd so this could be verified somehow.

 

I did some quick research and this method is widely used and in most cases proves to be verifiable with dyno results.

That is some cunny method you've got there.

I'd have a go but I'm assuming the chip box iv got which plugs into the intake sensor will give will give false information to actual values. How iv had it on the dyno a few months ago so have got a figure there.

All iv got to measure anything is the bluebook odb adapter - will this be suitable to get some measurements do you think?

I decided to experiment with this one.

Booted it in 3rd gear to redline. Outside air was 22C, Intake temp showing at 27C.

Max MAF reading I got was 163g/s x 1.25 =203.75 bhp

Max boost was 1.17bar-1.18bar

car is Factory Standard on 205/40R17 boots. Had Air filter replaced with OEM one recently.

I'd be very much interested in the above figures from anybody who can produce them. It'd be best if people had their cars RR'd so this could be verified somehow.

I did some quick research and this method is widely used and in most cases proves to be verifiable with dyno results.

I'd be interested to know where you got 1.25 from as an arbitrary value...

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Is it possible to display the MAF pressure without attaching a PC, like on the Climatronic for example?

 

Some info on the basis of the calc here, for example. From that page, the engine would be using about 11g of fuel per second, so if that is enough to drive the car at 140mph (a lot of if's...), so the tank would last about 50 minutes and the car should do about 12mpg at 140mph.

Edited 21 June, 201412 yr by pearce_jj

Same info here: http://wiki.ross-tech.com/wiki/index.php/Fuel_Trim_Info

It is good that calculations and actual are different.

 

the wee minimum 177 bhp ,1390 cc Twincharger can travel over long distances above 130 mph and still get over 22 mpg.

(and do it still when it has 204-210 BHP).

Is it possible to display the MAF pressure without attaching a PC, like on the Climatronic for example?

Some info on the basis of the calc here, for example. From that page, the engine would be using about 11g of fuel per second, so if that is enough to drive the car at 140mph (a lot of if's...), so the tank would last about 50 minutes and the car should do about 12mpg at 140mph.

At track days it does not last an hour, not in my car! I thonk think I got less than 12mpg around Bedford .

Can amyone get some readings please

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At track days it does not last an hour, not in my car! I thonk think I got less than 12mpg around Bedford .

Can amyone get some readings please

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Your car is broken

Took mine out for four x 15 minute sessions at Combe and had a good third of a tank left

Nope, you were not pushing hard enough!

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Nope, you were not pushing hard enough!

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Beg to differ, James I nearly took my passenger grab handle home with him

Tried to do this today but my obd2 bluetooth says no data on the maf

I got 76 g/s reading from obd2 and dashcommand, so 76 x 1.25 = 95bhp, and I assume that's at the flywheel not the wheels.

That is just theoretical max power the car can make based on some simple calcs as per the links in posts above. What it tells you is how much power your car can make while burning all the fuel with the available oxygen. It is by no means the measure of how much power your car puts down on the black stuff, more like a game really but still the more air it flows the more power it will be producing so there is a solid connection to power levels.  

What programme or app are you using to get an maf reading tried to apps with the bluetooth obd2 port buts says no data

DashCommand from Palmermotorsport for iPhone and WiFi OBD2 dongle from fleebay. Gives huge amount of data. 

I've got an dash commend one but it's from palmer performance I think. This one tells you bhp and torque haha not sure it's true tho. It said the other day 230bhp hahaha

Yup, the same thing:) I believe you have something on your motor, tuning box? Can't remember

Figures are calculated bhp at the wheels and depend on the precision of data you provide.

Yup, the same thing:) I believe you have something on your motor, tuning box? Can't remember

Figures are calculated bhp at the wheels and depend on the precision of data you provide.

nope no tuning box. Only done the middle box delete on exhaust, forge fmic and forge induction kit, thats it. The bhp will be at the flywheel

Edited 28 June, 201412 yr by Ant-Vrs

Yeah it'll be at the flywheel, it can't work out how much powertrain loss there will be.

The app says "at the wheels" . I have calculation scripts somewhere, I will check at some point. Calc said 203, app 193 or so.

I had been using the Torque app for Android. I'll give this a go instead.

The app says "at the wheels" . I have calculation scripts somewhere, I will check at some point. Calc said 203, app 193 or so.

is yours the paid one as mine is the free app, I want to see really get the maf gs reading to see if it matches

I paid for mine. MAF is calculated anyways as twinchargers have MAP sensor only-ECU is using IAT, MAP, atmosphetic pressure and RPM to calc MAF.

Martyn, would be interedting to see what TorquePro shows:)

Done it and got 206 bhp

The DashCommand "power at wheels" calc is at the wheels and is basically using mass of the vehicle (including driver and fuel if you put it in) and acceleration. It also takes into account tyres rolling resistance and air resistance if you put in such data.

 

CALC_PID_Power.pdf

 

EDIT:

So, in other words it does not use MAF data

Edited 29 June, 201412 yr by Jabozuma