Gruppe M intake installed
03-13-2009, 02:46 AM
#1
Gruppe M intake installed
Can hear the difference in sound and maybe it's my imagination but car seems more powerful. Biggest difference seems to be more torque, When I shift and hit the gas it throws me back in the seat more than before. Also no CEL after a day of driving. Possible because the Unitronic likes the increase in air flow
<img src="http://pictureposter.audiworld.com/137210/pict0033.jpg">
<img src="http://pictureposter.audiworld.com/137210/pict0028.jpg">
<img src="http://pictureposter.audiworld.com/137210/pict0033.jpg">
<img src="http://pictureposter.audiworld.com/137210/pict0028.jpg">
03-13-2009, 02:58 AM
#3
Was suppose to have this week...
Got an update that they are expecting it in this weekend and I will get next week. What kind of delivery date did you get? Am sure you got your new lug bolts also, They look great on the wheel and no need for the plastic cap anymore
03-13-2009, 03:07 AM
#5
Did they send you the free ones?
Since my car is basically indoors unless I'm driving it or around it a show I don't plan on putting locks. Have only driven the car a couple days since new wheels have been on and have gotten many compliments on them. Another thing I did is inflate them to almost 39, Max is 40. I think it gives me a bit more protection over our horrible roads
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03-13-2009, 04:35 AM
#8
If you read about the changes in the RS5 to get it up to 450hp......
they definitely comment on how the intake and exhaust on the RS4 are restrictive, relatively speaking. Your initial increases in air flow are probably causing a bit of a lean burn. Slightly lean is good for power but increases your detonation risk. The ECU will respond in one of three ways:
1. It may add fuel if the capability exists within the stock fuel delivery system and if the increased airflow creates an A/F outside the specified range that the ECU considers "normal".
2. The ECU will do nothing since it still sees the overall A/F ratio as still within the acceptablel range.
3. The ECU will retard timing as it does not like the leaner A/F and doesn't want to put the engine at risk for detonation.
Which ECU option produces the best result will depend on what is the optimal A/F for this engine. This info, I do not know. Obviously #3 will not produce power and may in fact cause a power loss in certain applications.
1. It may add fuel if the capability exists within the stock fuel delivery system and if the increased airflow creates an A/F outside the specified range that the ECU considers "normal".
2. The ECU will do nothing since it still sees the overall A/F ratio as still within the acceptablel range.
3. The ECU will retard timing as it does not like the leaner A/F and doesn't want to put the engine at risk for detonation.
Which ECU option produces the best result will depend on what is the optimal A/F for this engine. This info, I do not know. Obviously #3 will not produce power and may in fact cause a power loss in certain applications.
03-13-2009, 05:00 AM
#9
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The amout of fuel delivered is determined by the MAF sensor.
The car is not going to run lean. That is the whole point of a MAF EFI system, it measures the amount of air in and balances the fuel delivery depending on the throttle position and engine speed. you are not going to fool the signal to the MAF by having a less restrictive intake. It is no different than running on a cool day with denser air. The only time you would run lean is if the injectors could not match the fuel delivery requirements.
The intake will make power if (1) the stock intake is truly a restriction and (2) the new intake actually flows better and/or cooler. In many cases (such as the S4) this has not really worked out.
At least the Gruppe M part looks killer!
The intake will make power if (1) the stock intake is truly a restriction and (2) the new intake actually flows better and/or cooler. In many cases (such as the S4) this has not really worked out.
At least the Gruppe M part looks killer!