MembersPage/PeepPaadam (2006-06-30 16:15:29)

Introduction

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Hi all!

My name is Peep Päädam and i'm from Estonia. I have a modified Porsche 931 w/ 2.0 engine using K26/29 turbo. I'm planning to use VEMS Genboard v3.3 on it.


We are installing my V3.3 to my friends 944 Turbo 3.0 (yes, 3.0)

and we're planning to use cam mounted Hall trigger wheel. It's already used on 944T with Tatech EMS and has mounting for two Hall sensors (Honeywell 1GT101DC, datasheet here: http://catalog.sensing.honeywell.com/printfriendly.asp?FAM=solidstate&PN=1GT101DC) and aluminium trigger wheel that has two trigger points per sensor (180 degrees apart, because of the cam mount).

The wiring is already done and we're going wasted spark with Bosch coil-pack (everything already waiting for install).

Fuel injectors are Siemens 780cc High-Z.

Is it possible that someone would help me with setting the constants in MegaTune? Starting values would be:

High-Z, so no PWM-ing:


Yesterday we installed VEMS on the 951 3.0 and the installation process was painless. Calibrated things (TPS, battery etc) and got spark with Bosch 2+2 coil-pack.


Little update.

Got the car running and driving pretty good, though we have some problems.

We can't get the fuel map to suit high and low loads: tuning the ve table doesn't give effect and if we get the AF ratio ok at let's say 0.4 Bar, it will become pig rich on the idle and low loads and floods plugs. To get the car running good at low loads, the reqfuel have to be 2!!

Here's the configuration:

3.0 inline 4 Porsche 944 Turbo.

650cc high-Z injectors

VEMS v3.3 (firmware 1.0.38), 1 Honeywell Hall sensor.


30.06.06

Car runs now pretty ok, but I have the temperature sensors little off: IAT shows 8 degrees higher than ambient and CLT is something like 5 (not verified). I know that I must use EasyTherm but haven't quite understood how to do it:)

We can't tune it on the boost side before I haven't fixed the temperature thing.

Second problem is the tach that is reading 2 times lower than LCD and MegaTune. How to "make it right"?