Electronic Fuel Injection

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I have decided to go a different route then most and install two indivual throttle bodies (ITBs) instead of a single throttle body and plenum type system. So far everything is working great based on Speed Density (Maifold pressure reading) which many thought would not be possible. I also have a more agressive cam with no overlap which probably makes the situation easier (278 duration, .288" lift).

Heres what I have so far without spark control: http://youtube.com/watch?v=1MPw3m2VxWE

I have finally installed the EDIS spark control and what a difference it makes. This was actually one of the easier parts of the system to install because I already had the wire laid out. Anyway, following the Mega Manual was enough to get it installed and running within a few hours. Fortunately I already had a spark table from a friends car (although mine ended up being different). It cant be that that to build one from scratch based on your cars stock settings.



Calibrating temperature sensors
TWM 40mm throttle bodies, TPS, fuel rail, and regulator
Fuel plumbing
Final EFI assembly


Initial thoughts: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/p,319629
FIdle and MAP: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/p,319717
Fuel plumbing, etc: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,204528/
Sensor calibration: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/p,324206/highlight,/#324206
Throttle linkage: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,280025/
AN Fittings: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,280238/
Fast idle: http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/p,374534/

MegaSqiurt info
Pickups (Hall, coil, VR): http://www.megamanual.com/ms2/pickups.htm
MegaSquirt and Crane XR700: http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,275308/
MegaSquirt and Tach signal: http://msefi.com/viewtopic.php?p=131300&highlight=distributor
36-1 tooth, Ford EDIS ignition (future): http://www.megamanual.com/ms2/EDIS.htm


Tuning will take 10's of hours, no if's and's or but's. There are no cutting corners here and no easy way out. It all becomes much easier once you can accept that (ask me how I know). Now I am getting quite good at tuning and actually enjoy it. Its great to be able to change the characteristics of my motor without getting my hands dirty.

The best thing to do is read the Mega Manual but outside of that here a few things I will reinforce. Work on small tables at a time. I find it easiest when my friend drives while I tune. Even if I had a dyno I would still want someone driving while I watch and tune. I also find it extremely helpful to work out of the car! Taking logs and going home to sit and relax and really think about what I am doing is perfect for me. It really easy to see irregularities and the Mega Logviewer allows you to modify the tables right in the program.

Other than that, read the manual and be patient. The manual does an excellent job and anything I could tell you here would be the same there. Oh yea, and change one thing at a time (the manual says that too).

Master parts list

  • 2 TWM 2900 DOCE 40mm's (2900 + 2910)
  • TWM Fuel rail
  • TWM pressure regulator (2800-6401)
  • TWM TPS switch and plug
  • Mangoletsi intake manifold
  • 318 water manifold
  • Copper pipe bypassing manifold (to heater box)
  • Electronic under-car fuel pump (40+ PSI. for a Ford F150)
  • MegaSquirt (MS II v3. keeping distributor for now, future expansion in mind)
  • O2 sensor (Innovate LC-1)
  • 12' MegaSquirt pre-labeled wiring harness
  • Mechanical fuel pump blockoff plate
  • Two Bosch temperature sensors (62110788115)
  • Painless wiring 7 circuit fuse box (dual relay hot switched relays)
  • OEM BMW intake manifold gaskets
  • Injectors (22# Bosch Pink Tops)
  • Lokar throttle cable 36"
  • Fuel plumbing, filters, AN fittings, etc
  • Mangoletsi barb for brake vacuum
  • Grommets
  • More band clamps (big ones for fuel pump)
  • Hose mounting clamps
  • 50mm TWM air horns

Notes to self

(none at this time)

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