MembersPage/RandoNomm (2009-04-11 17:52:28)

Hello, I own 1991 Audi S2 coupe with 2,2L 5syl 3B engine, and my main goal is to make it run on VEMS and get power between 350-400BHP. Right now my best ET at 1/4 mile is 12,82 seconds.


Engine

VemsAudiAan shows a straightforward wiring recipe for this engine, wether

for ignition upgrade, you can either go distributerless, eg.:

The most appropriate ECU:


Chassis

Brakes: 4x zimmerman discs, ferodo brake pads, Motul RBF600 brake fluid. Front brakes are waiton for upgrade, alredy buyed wilwood 4 piston calipers and audi A8 320mm discs.

Suspension: 4x kony yellow shocks, original springs are wating for lowering ones.

Body: The car got new paint a year ago, for better cooling it has modified RS2 replica front bumper, a little wider rear bumper, loesed lower door covers, tinted windows.

Other: 034 short shifter


Plans:


Turbo update is already in my plans, garret GT3071r i think, but all this comes with VEMS ECU.

The EGT sensor replacement is becase it is now in manifold, wiht old manifold it was after the turbo.


Setting up analog in to read it from gauge and log it:

First you need little simple schematic between cable from MAP to gauge because otherwise, connecting it directly, it will probably affect MAP reading.

analoginskeem.jpg

VEMS 300kPa MAP sensor

I connected my compressor variable output (with gauge: 0 to 2,5BAR) directly to MAP input.

Settings where: calibration 64, offset 0

First I needed to get 100 reading at atmosphere pressure, I changed numbers at analog in curve to get it.

Now raised compressor output to 0,5BAR and played with numbers in analog in curve to get reading 150, then output to 1BAR and played to get 200, then 1,5BAR to get 250 and then 2BAR to get 300. After that tested other readings, 0,1BAR - 110, 0,2BAR - 120, 0,3 - 130 etc. I din't have to change any more numbers at analog in curve because it was enough measure these 5 points (0BAR - 0,5BAR - 1BAR - 1.5BAR - 2BAR).

These are numbers from analog in curve:

0 - 0

1 - 0

2 - 0

3 - 0

4 - 0

5 - 0

6 - 0

7 - 0

8 - 0

9 - 3

10 - 38

11 - 73

12 - 107

13 - 136

14 - 169

15 - 225

16 - 240

First 8 rows are 0 becase they din't change the reading, also are 15 and 16 set to linear in because they din't cange nothing also.

Log file (RPM spikes are things what I can't get rid of):

logi.JPG

It shows also that original turbo is small :P boost rises to 1,6BAR and then drops down again, also the A/F is not wery good (soft is for RS2 injectors, I'll try them later).