MembersPage/MarteleurTim (2005-08-08 18:12:57)

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


Trigger secion

... describe the available trigger signals (links are OK too)

Current plan for Ignition

I keep the distributor, lock plate in the distributor and rotate so that the inductive pickup triggers 50-60° before TDC, remove vacuum hose.

Q: Will this signal be controlled by an ignition IGBT and fire the coil by another ignition IGBT?

A: The input from the distributor trigger is sent to trigger input #1 in the EC36 connector. The ECU then timing advance and fires the coil using one IGBT, also in the EC36 connector.


ITEMS TO BUY:

I recommend buying a pre-assembled Genboard to avoid this part of the project, but in case you feel confident with electronics and like the idea of saving some money - then go ahead. I would advice you to fully populate the board with as many fuel injector FETs and ignition IGBTs as you can afford - they can be used for a lot of other things and the minium I'd recommend is 6xFET + 5xIGBT. That allows you to run a direct-fire (distributorless) setup in the future.


Q: What about TPS? Should I look for a TPS with WOT switch and potentiometer?

A: You have to use a true potentiometer type TPS for full use and control, a WOT switch is useless and has no function with VEMS Genboard. In the tuning software 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