All Things Mk5 > APR Zone
APR TFSI intake
Keith@APR:
--- Quote from: danishmkvgti on December 12, 2012, 11:49:26 am ---Funny APR hasn't responded to this tread yet?? :confused: :signLOL:
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Funny you post this whilst I am in the midst of typing out an hour long diatribe to explain things. :P :signLOL:
Keith@APR:
--- Quote from: Hedge on December 11, 2012, 09:47:30 pm ---I would think it compares very well to the ITG as afterall that is what it is. :confused:
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Do you mean to say the APR Carbonio pictured is the same as an ITG? If so, they do not share any parts, are designed and manufactured by completely different companies and the APR Carbonio front part of this intake was available way before the ITG/VWR canister intakes.
stealthwolf:
--- Quote from: Keith@APR on December 12, 2012, 12:45:37 pm ---...manufactured with methods that do not allow for precise enough tolerances regarding the diameter of housing around the sensor and can be too large and too small to a point that creates improper maf readings....
...a properly designed and manufactured intake for a 2.0T FSI with k03 or k04 turbo will result in faster spool, better throttle response, more top end power, better fuel economy and overall increases in the efficiency of the engine's operation....
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Stupid question (since I'm not very mechanically minded when it comes to cars) but how much variation did you find in maf readings? How did this translate in to figures we can understand like bhp?
If a variation of, say, +/-1% creates a variation of +/-1 bhp, then no big deal (IMO) since you can get greater variability in bhp from atmospheric conditions. But this is completely different to say a variation of +/-1% causing a variation of +/-10bhp since this would be noticeable. Would be interested in your interpretation of the results.
Keith@APR:
--- Quote from: stealthwolf on December 12, 2012, 01:50:02 pm ---
--- Quote from: Keith@APR on December 12, 2012, 12:45:37 pm ---...manufactured with methods that do not allow for precise enough tolerances regarding the diameter of housing around the sensor and can be too large and too small to a point that creates improper maf readings....
...a properly designed and manufactured intake for a 2.0T FSI with k03 or k04 turbo will result in faster spool, better throttle response, more top end power, better fuel economy and overall increases in the efficiency of the engine's operation....
--- End quote ---
Stupid question (since I'm not very mechanically minded when it comes to cars) but how much variation did you find in maf readings? How did this translate in to figures we can understand like bhp?
If a variation of, say, +/-1% creates a variation of +/-1 bhp, then no big deal (IMO) since you can get greater variability in bhp from atmospheric conditions. But this is completely different to say a variation of +/-1% causing a variation of +/-10bhp since this would be noticeable. Would be interested in your interpretation of the results.
--- End quote ---
Unfortunately, it doesn't translate directly to BHP but effects things like how much fuel the ECU applies. The maf tells the ECU how much air is coming in to the engine and then the ECU uses this info in a bunch of different calculations to inject the proper amount of fuel. If the maf reading is not precise, the ECU puts the wrong amount of fuel in, either too much or too little. The oxygen sensor then reads the actual amount of fuel and air burned and reports that back to the ECU. If the ECU was wrong because the maf data sent to it was wrong, it tries to fix the problem with the information the primary oxygen sensor gave it by changing the fuel trims. The ECU is now very confused.
When the ECU is confused and is trying to fix the confusion with fuel trims, all sorts of weird running issues can happen. It can be a lack of power, it can be misfires, it can be slow response, it can be hesitation, etc. The more the ECU tries to fix the confusion, the more the ECU gets confused. In some circumstances, the ECU can run leaner than its supposed to which might even make more power!
Its the old adage of Garbage In, Garbage Out when dealing with computers. If the data the maf is sending to the ECU is incorrect, what the ECU tells the rest of the engine to do will be incorrect also.
I'm sorry there is no easy answer but modern internal combustion engines and their ECU's are very complicated systems.
The biggest problem with this entire situation is that one intake may work perfectly but the next intake from the same company, same part number can cause problems for that purchaser.
The maf is one of the most important sensors on the ECU.
Janner_Sy:
--- Quote from: Hedge on December 11, 2012, 09:47:30 pm ---I would think it compares very well to the ITG as afterall that is what it is. :confused:
--- End quote ---
:confused:
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