New to rs4

[o3mrt]

Awesome thanks
I am based in Thornlands, Brisbane. Have you done the SAI delete also? I got rid of it on the s3 but am dubious about doing it on the rs4 purely based on the APR tune and if it will affect it or even if it can be coded out due to APR locking the ecu or is it done through vag com?

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Yes, I’ve removed the SAI pump. I don’t get any errors for it at all. You could test that by just disconnecting the pump & seeing if it throws any codes. you will only notice the pump on cold start. If you can’t hear it at the moment on cold start, i would say that it is already coded out. You should be able to get it from under the car once the under tray is removed, then disconnect electrical connector to SAI as a test, the next cold start it will either throw a code or not. I capped off the aluminum tube that runs along bank 1 and also the inlet into the airbox.

I don’t believe that you can code it with VCDS.

You should be able to go to your APR dealer and check that you have the latest revision of tune to suit. Mike Webber @ Prestige & Performance has done a few B7 RS4’s so I’d head there.

Can you confirm if the sai block off plates are the same as the 1.8t ones or are they a different shape?

[o3mrt]

as justin mentioned the 5500 kick is not ‘super power because RPMs!’…it is the threshold at which the stock tune throttle body restriction normally disengages

Up until 5500 RPM the stock tune limits the throttle to about 52% in cold temperatures due to a calculated torque limitation in the first few gears. Beyond 5500 RPM it goes full throttle and you feel the car pull away. If it’s mild out, it is limited to about 60-70% so the ‘kick’ is not as severe. If it’s 90 degrees and humid out and the density doesn’t support enough power/torque to warrant the torque/throttle restriction, the throttle is allowed to be 100% right through the rev range. This is while stock.

When you’re tuned (supercharged, or NA tuned) the throttle restriction is eliminated as most tuners figured out how to turn that off. So you ‘lose’ the 5500 RPM kick. But it’s not like you gained power before when you kick into 5500+…you’re just no longer LOSING power below 5500 rpm.

So in essence a new air pickup could be routed where the power flap is currently located providing it is adequately shielded?

[MikeMike]

Awesome thanks
I am based in Thornlands, Brisbane. Have you done the SAI delete also? I got rid of it on the s3 but am dubious about doing it on the rs4 purely based on the APR tune and if it will affect it or even if it can be coded out due to APR locking the ecu or is it done through vag com?

Sent from my iPad using Tapatalk

Yes, I’ve removed the SAI pump. I don’t get any errors for it at all. You could test that by just disconnecting the pump & seeing if it throws any codes. you will only notice the pump on cold start. If you can’t hear it at the moment on cold start, i would say that it is already coded out. You should be able to get it from under the car once the under tray is removed, then disconnect electrical connector to SAI as a test, the next cold start it will either throw a code or not. I capped off the aluminum tube that runs along bank 1 and also the inlet into the airbox.

I don’t believe that you can code it with VCDS.

You should be able to go to your APR dealer and check that you have the latest revision of tune to suit. Mike Webber @ Prestige & Performance has done a few B7 RS4’s so I’d head there.

Can you confirm if the sai block off plates are the same as the 1.8t ones or are they a different shape?

Sent from my iPad using Tapatalk

I didn’t use block off plates as I believe one of them is a pain to get to from the rear of the engine from what i read in various posts. I just capped it off at the pipe that runs along bank 1 and leads to the rear.

That way I can also completely reverse the mod if required.

https://s21.postimg.org/4rx80fptf/IMG_2030.jpg

I also capped off the air feed from the airbox as that is post air filter & will allow unfiltered air into the engine.

https://s13.postimg.org/vhqf0e25v/IMG_2032.jpg

https://s15.postimg.org/asjpeeqh3/IMG_2039.jpg

You can also reference this post as well.

http://audirevolution.net/forum/index.php?topic=2631.0

[o3mrt]

Hi,
Can anyone shed some light on a few questions that I have.

1. Does the rs4 have a after run fan like the turbo cousins? I have a Apr supercharger and when I turn the car off the water pump that comes with the kit stays on for around 5 minutes but no fan. When you turn the air con on both fans run.
2. Is anyone with a supercharger running a gruppe m intake or different filter and does it throw a cel? I have been told that it can play havoc with the load calculations.
3. What other mods would you do, it has as I mentioned before a Apr supercharger and full miltek exhaust.
4. My flaps on the rear muffler seems to be always open. I thought they are supposed to be closed when the car is off?
   Thanks,
   Marty

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1. Yes, the RS4 does have after run fans that will run if the engine is very hot after it has been pushed hard but they don’t normally run after normal driving. The water pump that your hearing is the separate water pump for the supercharger cooling system, it is located just below the front licence plate under the separate intercooler for the supercharger and always runs for about 20mins after you turn the ign off. That is completely normal.

You can see a picture of the pump in this photo. https://farm6.staticflickr.com/5520/14372270420_6d638f5539_b.jpg

2. You can run a different filter if you wish, some do run a gruppe m, they sound great but don’t do a lot for performance, especially if your in a lot of traffic as they tend to pull alot of hot air from the engine into the intake and then raise the IAT which kills performance. I’ve got a K&N panel filter in the OEM airbox with a separate cold air feed after removing the drivers side(AUS) aux radiator, that has worked quite well as it keeps IAT down when in traffic. Lots of posts on RS246 about doing a cold air feed.

My Cold Air Feed

Parts

https://s14.postimg.org/6a3aw9tdd/image1.jpg

Rear

https://s3.postimg.org/gwdu4ewoz/image5.jpg

Front

https://s13.postimg.org/ul9b0blt3/image6.jpg

Fitted

https://s22.postimg.org/stcsmaxn5/image9.jpg

3. I would put in a P3, that will allow you to keep an eye on IA temps, and then get to understand the beits of bringing down the IAT. I don’t know where you live but they can make a significant difference to the performance of the car. I personally live in Aus (it doesn’t get below 0 where i am) and have now replaced my supercharger coolant with a demineralised water, this made a significant difference in how quick the temps would drop when moving compared to the G12 coolant that is in there.

As mentioned, do the down pipes, they will make a big difference to the car.

4. You should be able to push the “S” button (with AUS delivered car you can) and hear the difference. I would say that the vacuum valve actuator on the exhaust have been disconnected since that are open all the time. Check under rear of car near exhaust valve for a vacuum line that has been blocked off. Connect that to Miltek valves and your exhaust should work again.

Hi again,
Looking at the photos, am I right in assuming you have deleted your aux radiator to run a cold air pick up? Have you got any suggestions/guides to do the removal and have you had any issues with removing the rad?