VEMS Home Products Documentation Wiki Webstore
WikiHome ProjectPage DocsPage UnderDevelopment MembersPage SiteIndex RecentChanges Preferences
MembersPage/MarteleurTim (2015-01-01 07:00:00)

I want to turbocharge my BMW 518i E28 M10 engine by using VEMS

I live in Belgium

LCDincar2.JPG

Engine specs

Initial completely stock engine, in second stage-->(turbo, inj, intercooler...)

ITEMS TO BUY:

Trigger/ignition plan: MembersPage/MarteleurTim/Ignition

TPS issue

A true potentiometer type TPS is recommended for full use and control. A WOT switch is not much use, it can be used to raise boost target with BoostControl. In MegaTune you configure and calibrate the maximum and minimum TPS values (idle and WOT). You can also set the idle threshold value (1-2%).

Only in some cases do you really need to know the exact position of the throttle plate. You can use a resistor grid with the stock "on/off" TPS, to make three distinct positions/resistance values (idle, in between, WOT). It has worked really well on this car: MembersPage/MattiasSandgren/BmwSevenTwentyEight

The basic idea is to connect the TPS In (EC36-1) to a pullup resistor towards +5V (EC36-28) and a pulldown resistor towards GND. The pullup resistor is shorted by the WOT switch (raising TPS In to +5V) and the pulldown grounds the signal. To protect from a short (should never happen), connect a resistor between GND and the pullup resistor and Idle-switch so that there is a minium resistance to be met between +5V and GND at all times. Use 1K resistors, or similar size.

[A drawing of the circuit used with the stock TPS]

Coldstart

Q: How will I control coldstart issues?

I use the Auxiliary air valve, it does a good and reliable job and is activated as the "fast idle" valve, and shuts off at a specific temperature with th thermotimeswitch.

Q: When I use the Auxiliary air valve how will the electrical heating be ensured?

A:You can use the default EC36-pin3 (P259, 4) to ground a relay that in turn delivers power to an electrically controlled auxiliary air valve.

Assembling V3.3

Q: Can I follow the same instructions as for V3.2 for connecting powersupply and connectors for serial cable etc...?

A: Yes, only the trigger connection is different, the 2x3 pin header now misses the south-east pin. Connect the northern middle pin to the north-east pin to get the primary-trigger forward.

[Picture of Genboard v3.3]

I use a custom cable using a 6.3 mm phono plug (for audio use)for the serial connection.

Power Up: MembersPage/MarteleurTim/Powerup

PS2 keyboard

The JP_PS1 headers is the one in this picture, to the left of the Atmel. Pin 1 is the one furthest from the EC connectors and also farthest up in the picture. Documentation on this is under reconstruction, I can't find the old page anymore. //Mattias

JP_PS1Mini DIN6Function
14Vcc
23Gnd
31Data
45Clock

[PS2header]

SOLDERED THESE COMPONENTS ON V3.3

1. Flyback lead see pic: [flybacklead]

2. From Rescue kit1 the inductor marked 1R5 must be soldered Between A&B.

If a fused power supply is being used then a wire must connect 1&2, otherwise a fuse link must be used. see http://vems.hu/www.vems.co.uk/VEMS/ConnectingPower.htmlpowerconnections

3. EC18 + EC36 connector

4. 8 IGBT's + 8 FET drivers

5. MAPsensor

6. PS2header + connector

7. LCD Header + connector

8. Serial header + connector

9. D37 Transient supression diode [diode mounted]

10. solder JP2 & JP7

11. solder R30=2k7 pullup resistor