S2 engine upgrades

[Master]

Hi all please excuse my 2nd post and hello to all , hopefully be on here a lot now I own. S2.

Am after some advice really as new to the audi,s and still reading and doing my homework


In a nutshell am looking to find out what the difference is engine wise between the s2 and the rs2?????????

And what's needed to upgrade the power on the s2 to something similar to the rs2

Are the s2and rs2 parts interchangeable and what's the best and safest way to do it pls


Many thx and srry if it's been asked a million times before too

[Rikki Kitto]

If you use the search menu you will find loads of threads on this, sure some people will tell you you can get better performance from other mods too not just RS2 root

[newsh]

What year is your S2, is it a 3B (with distributor ignition) or ABY (with coil packs).

[Master]

It's an aby coil pack model and the year is a 93 and it's an avante not sure if that counts for anything haha.


Cheers for the replys too have been nosing ith the search function but there's a lot to take in and a lot of opinions and variations on the best way to do it


Just want people's opinions on how to do it that have already been there and done it so to say

[UrS4boy]

In a nutshell am looking to find out what the difference is engine wise between the s2 and the rs2????????? And what's needed to upgrade the power on the s2 to something similar to the rs2. Are the s2and rs2 parts interchangeable and what's the best and safest way to do it pls. Many thx and srry if it's been asked a million times before too

Actually the count is 1 million and 3, but who is counting?

First of all you might want to read this bit of 20 valve inline 5 turbo history to bring you up to speed:

http://forums.quattroworld.com/s4s6/msgs/194362.phtml

From the above, you should see that the AAN and ABY are very similar except for the intake manifold configuration and that the ABY and the ADU in the RS2 are even closer.

With that in mind, I will tell you how I "RS2'd" my AAN in my 93 UrS4.

1. Change the exhaust manifold from the stock manifold to an OE RS2 exhaust manifold *OR* a Wagner RS2 EVO cast manifold. I went OE RS2 but I have a Wagner EVO to install some time. Here is some exhaust system reading for you:

http://forums.quattroworld.com/s4s6/msgs/196904.phtml

2. Change the turbo to an RS2 K24-7200 or the Volvo K24-7400 (some mods needed) or a Garrett hybrid GT2876 (or 2871) from 034. I went RS2 K24-7200.

3. Change the injectors to RS2 Bosch green tops or equivalent. You want to make more power? You need to flow more fuel at higher boost levels. I went OE RS2 Bosch. Here is some injector reading: http://forums.quattroworld.com/s4s6/msgs/20441.phtml

4. Change the Mass Airflow (MAF) sensor to a RS2 unit (or leave it as is, your choice). I went RS2 MAF. Here is some MAF sensor reading: http://forums.quattroworld.com/s4s6/msgs/20442.phtml

5. Upgrade your Manifold Absolute Pressure (MAP) sensor from 250 kPa (2.5 Bar) to 300 kPa (3.0 Bar) which, with the proper software, gets you boost levels into the 26 to 28 psi (1.9 Bar) relative range. I went VMAP (the adjustable version). Here is some MAP sensor info reading: http://forums.quattroworld.com/s4s6/msgs/20417.phtml/

6. Have the software upgraded by a reputable firm. This involves booth the timing/fueling chip on the top board and the boost chip on the bottom board. I went with MRC Stage 3 (generic RS2 plus). This makes about 289 wheel hp or about 360 crank. Other softwares can do a bit more. Pinking/pinging/pre-detonation becomes the limiting factor and is a function of the octane of the fuel you can get. Higher the better.

There are also ignition upgrades to consider but the above should be enough to get your litttle grey cells going, mon ami.

[Master]

Thx some very informative reading there for sure
Many thx for the post and info much appreciated

Especially liked the article on the flow rates for the exh manifolds and the individual flow rates too. Very surprising the difference between the manifolds as well , also curious as to if it's preferential or not to go twin scroll or single if upgrading turbo .

[UrS4boy]

Thx some very informative reading there for sure
Many thx for the post and info much appreciated. Especially liked the article on the flow rates for the exh manifolds and the individual flow rates too. Very surprising the difference between the manifolds as well , also curious as to if it's preferential or not to go twin scroll or single if upgrading turbo .

Someone can (will) correct me but I don't know of a twin scroll bolt-on turbo for our (3B, AAN, ABY and ADU) inline 5 20V turbo applications. They are all single scroll. Some of them HUGE.

[Master]

Maybe something to do with the uneven no of exh ports perhaps. Anyone using a 3076 tubby with ported anti surge housing then. And is surge a problem with these motors then ?