I have just got my hands on a Microtech LT-8 ver1.0 but don't know much about efi setups. I've only got the computer itself. What else do I need to get it going and is there a good source of info for these things.

I've been on the Microtech website and they have some wiring diagrams for fitting v2.0 LT-8S to toyotas, nissans, honda's etc but I want to fit it to my 1000 coupe with an A14/15. I'd appreciate any advice!!!

Gosh its a mine field...your gonna need at least a loom and sensors and hand controller or laptop cable and software to program it. The you will need to take it to a dyno for them to tune it. Thats why Im starting with a factory ecu for my SR20 to start with until I do more homework.

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Sure is a big question.

Firstly lets look at the most basic system requirements then others can add more info if they wish.
Bare bones set ups (fuel only) can be run with only TPS (throttle position sensor), cold air sensor, water temp sensor, and barometric pressure sensor(sometimes part of ECU).
No need for O2 sensor or MAP as basic system can be run "open loop" especially in a budget racecar.
Hardware includes - injection manifolds, throttle bodies, sensors, injectors, fuel rail, fuel reg, possible efi fuel pump, fuel pressure lines, and ecu. Obviously a hand controller or laptop and program is a must.
You can go further and consider timing set ups in the Maps and most modern aftermarket ecu will have extra inputs for switching things like thermofans, fuel pump cut outs etc etc.
Once you start to understand what you are doing Mapping is easy, baseline maping and A/F ratios are best done on a dyno when starting out but there is nothing like tuning your own racecar with a laptop and A/F meter and watching instant changes and the effect on performance.

Good luck.

Ok. I'd like to start simple (and cheap) and get fancy (and expensive) when I know the basics are working. I'd really like the mapped ignition aswell as fuel injection.

We have the Microtech LT-8, injectors, fuel rail, fuel reg, and fuel pump. I'm going to manufacture a manifold and will use a pair of bare-bones solex carbies as throttles for proof-of-concept. Hopefully will look at a better throttle body setup later when the package is working.

I would like to run both TPS and a MAP sensors and thought it would be best to stick to a complete sensor package off one car - ie get all the sensors of a camira etc. Is this a valid theory ?? If so what car would be best to rob parts from?

The Microtech website's circuit diagrams refer to installing it in a car already equiped with efi and ignition packs etc. Do I need an ignition pack as well?

Microtech sells the laptop cable and dongle for $120ish or the hand-held 4-line interface module for $200ish. Has anyone used these and what is best ???

Do you realise that whilst Microtechs are programmable to a degree they essentially pre-build them with firmware to suit a particular engine setup. I bought an MT-8 that was previously used in a Nissan ET Pulsar and found that I had to send the unit to Microtech to fit a new board to suit the CA18DET. From memory it cost me a couple of hundred dollars to have the unit modded and get a brand new loom. What motor was this LT-8 previously running? As if it wasn't on a similar engine you are up for some more dollars..best to call Microtech to discuss I reckon.

It may have to be reconfigured for ignition type, cost any where from $150-$300.
Microtechs have built in map sensor, thats the black hose nipple on the ECU.
Delco type sensors are compatible (eg camira,pulsar etc)
TPS can be switch type as the microtech used the switch for idle maps and then switchs to load maps using the MAP sensor when opening the throttle.
you really only need a temp sensor,tps and a Ignitor for the coil.
it will run fine without air temp and oxygen sensor.
The oxygen sensor is only use for a display on a microtech as they dont run closed loop mode at all.

1200coupe...No map sensor? TPS only, I have never come across a system that doesnt use a MAP or AFM.
A EFI system has to have a MAP or AFM to work.

Yes I had the same prob as cadet1200 - got a Microtech from a RB25DET, tried to put it on a CA18DET....no good had to send back to microtech from rework....$400 I believe. [Because it was 6 cyl to 4 cyl]...I thought it would just be a selection in the software like a Wolf3D...anyway.

There is a company called Maztech in Melbourne that specialise in tuning these things, and should be able to give you some advice on what you will need, but it may well depend on what engine the unit has come from

ok all good
you will need to find out what the systems was off
there can be several things different
1) injector resistance and current draw (low or high)
2) the type of ignition pickup optical or hall effect
3) the number of outputs for coils (waste spark possible)

find out what the ecu is off first
then i would try to get all the bits of another car as you say but i would be more inclined to get ET pulsar bits rather then camira
the dizzy will go straight into a series wont it? and the microtech will read the optical pickup directly, this can trigger the stock coil singly or twin or even four depending on how many ignition outputs the ecu has (either two or four)
the tps is easy as just about any japanese (or maybe german (bosch) sensor will do but make sure that it has the low to high resistance rather then the switch type (although both will work) i would suggest for ease get a silvia or rb one or one off any mazda after about 86
the rest is pretty much standard, get a bosch temp sender off anything (should be obvious as they have a plug that looks like an injector on it) and i would have a go at using ET injectors as they should be about the right size and are low impedance
hmm i would use a set of coils off the hyundai range as they are a nice compact twin output twin coil pack for about 100 dollars new, you could try somethign second hand though.
you will need to send the ecu back to microtech for setup but you should get all your hardware first so you can tell them what to change and it will cost you up to 400 dollars (thats where they make their money)
god what else
if you have a big cam you may not be able to run the map sensor effectively but at any rate you should have a pickup to each runner to minimise the pulsing. tps sensor only can work well thoguh so dont discount it yet.
hmmmm what else

anyway give me a message or chat to me on msn if you want any more ideas
i could tune the thing if it is registered about christmas time as ill be back in newey then

also if you want some injectors etc then let me know


ben

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Your question may have already been answered in the other posts - with big cams sometimes MAP sensors struggle to get appropriate sygnal. I use TPS, water temp sensor, cold air sensor, baro pressure sensor and run open loop with Haltech ecu. Only consequence is I dont run a cold start function but its on my rallycar so it doesnt matter. See my photos for pics because I dont know how to link pics to posts.