View Single Post
Porschekid962 Porschekid962 is offline
Registered User
Porschekid962's Avatar
Join Date: Feb 2004
Location: pasadena/novato
Posts: 1,510
Send a message via AIM to Porschekid962 Send a message via Yahoo to Porschekid962
I have yet to see an EFI tech box on a streetcar, still havent seen Pectel, McLaren Electronics, Bosch MS, Magnetti Marrelli, or some of the other racecar bred boxes on a streetcar and there is a reason. They are expensive, require a lot of tuning, require more than a handful of sensor inputs and lots of dyno time and experience to setup correctly. Most of the upper echelon motorsport style ecu boxes have two wideband lambda inputs, crank position sensor, cam position sensors, exhaust temp, intake temp, manifold absolute pressure, oil temp, oil pressure, water temp, water pressure, knock sensors, throttle sensor at the pedal and throttle body(ies) mostly on fly by wire, plus other fun individual cylinder sensors mainly for tuning reasons. So hook that all up to in our case 6 injectors minimum, you could run staged injectors on a race motor so that would be 12, then you have your motor twin plugged so your running 12 coil on plug setups which means you need at least 6 coil drivers or you could split the signal to run all 12 or just get a brain that can handle it all. Then you have your cooling fan set to come on when the oil/coolant gets to a certain number, the ecu can self adjust itself based on af/r numbers, then you have your four wheel speed sensors wired in so you can do some traction control and launch control. Then you have an output to your dash and data logger if your dash doesnt log data on its own. Thats just the basic motor loom for a race style setup you can go crazier if you want.

For a street car I would want to run full sequential injection, you need a cam sensor, crank sensor, throttle sensor, thats pretty much the super bare bones but i would definately add a wideband 02 sensor, intake temp, oil temp, oil pressure, MAP sensor and possibly two knock sensors for logging and tuning purposes. Also depending on the type of ignition you choose to run, dizzy with cdi boxes, dual post coils, coil on plug what have you that your brain will support it.

Find someone local to you that has a good reputation for dyno tuning motors with a specific ecu and see what fits your bill. Have fun!
74 911s neverending story. two feet and a jetta for now.
Old 06-03-2008, 10:58 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #19 (permalink)