I decided to take out my MAF's completely since I run a MAFless tune and help
with the airflow on stock airbox and stock turbo inlet piping.

The throttle response seems better and butt dyno tells me car pulls harder.

Taking out any restriction in the airflow should only help car breath better.

I had 2 plastic pipes fabricated by a local fabricator, pictures attached.

 

Todd K mafless tune is AWESOME!!!

 

Nice fab work. How is the point of restriction determined? With vtgs, I wouldn't think it would be the maf meter but what do I know. Do you have any performance times, 100-200 km/h or 60-130 mph? It would be interesting to see what the e85 tune lays down compared to race gas.

 

What is a 'MAFless' tune and what is the benefit?

 

I don't have a PBOX hope to get one soon and time myself.

 

Advantages

By changing the engine from MAF mode to MAFless/MAP mode, vehicle modifiers claim two advantages:
The MAF may pose a physical restriction across the vehicle's intake tract, thereby reducing airflow into the engine. By removing the MAF this restriction is eliminated, potentially improving engine performance.
By moving the airflow measurement sensor from the intake plumbing to a point closer to the cylinders, the time lag from air moving past the sensor to reaching the cylinder can be reduced, thereby improving throttle response.

 

Are you running a speed density/N-alpha tune or combination of both?

 

That Todd would know, only thing is if MAF is plugged it defaults to MAF tune unplugged goes into MAFless tune no CEL showup.

 

That's pretty cool. You will need to optimize your SD tune with your different components as SD tunes are much more specific for the mods you have on your car compared to MAF tunes. Once you get yourself a Pbox you will be able to assess gains/losses. Sounds like your having fun!

 

When i dynoed my 996TT a year and a half ago,at the first pass it showed 572AWHP (mustang)...During fine tuning the maf went off...and so i repeated dyno with maf not operating...and guess what...575AWHP...so it doesnt make a difference at WOT whether you have a maf or not...the differences were in idle and part throttle where the car just couldnt operate proper...but at WOT it didnt play a role...
996/997 engines have both,maf and map in order to have precise measures of any conditions...Almost any other turbo engine has only one of these sensors...So if one fails the car can operate with the other...without any major issue...
997 has two mafs and that is the reason why we dont failures such as 996TT...air flow is seperated and divided by two and maf output voltage stays well below failure limit...

 

well this all explains why my tuner (who is currently doing a proto build) took pics of the MAFs removed from my car...

 

i did some testing 4 todd ova a year ago and the car def spools faster and is smoother without mafs and no cel

 

Interesting! great info. on this thread

 

Technically neither... Basically there is no true way to measue load, it's cacutaled with throttle position as one of many inputs but load is the same if your running 1 bar or 2 bar.... kind of a scary thought.

Basically the only reason this "works", is because of the dual bank wide band fuel control.

Far from optimal, but we've done the same thing on other makes in the past.

 

Geez, I wish I knew what you all are talking about. It sounds interesting but I don't have a clue as to what's going on and whether it's good or not so good.