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Location:
Nowra ,NSW
Registered:
May 2002
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EFI for 2t-g ????
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Fri, 02 August 2002 06:45
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Hey,
i've got a 2t-g set up with carbies atm, and also have throttle body injectors plenum etc.., microtech computer (don't know what model - it has screwdriver dials), wiring loom and already have a return fuel line to tank set up.
What else do i need, other than fuel pump, to set up efi??
I have seen diagrams with things such as pressure regulator, pulsation dampner to do with fuel delivcry, what is all this and do i need it all?????
Help would be much appreciated
thanks
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I supported Toymods
Location:
melbourne.victoria.austra...
Registered:
June 2002
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Re: EFI for 2t-g ????
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Fri, 02 August 2002 07:24
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yes u need a bit more than that
the damper takes *pulses* out of the fuel to ensure the supply is constant and not fluctuating. pressure reg keeps fuel supply at a constant pressure
u need things like a dizzy setup that the microtech can talk to for spark, you need map/afm sensor to measure air flow or manifold pressure, water temp sensors, throttle pos sensor, air temp sensors, oxy sensor, just a few to get you started on..
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Registered:
May 2002
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 Re: EFI for 2t-g ????
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Fri, 02 August 2002 08:57
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I'll assume that your inlet manifold already came with the throttle body, cold start injector, TPS and fuel rail.
With the stock 2TGEU computer you will need an airflow meter(AFM) to measure the volume of air going into your engine, but i think your microtech would use a MAP (manifold air pressure) sensor which should just screw into your plenuum chamber, in that case you may require a more accurate throttle positioning sensor than the stock 2TGEU ones (like a 4age TPS). you could get away without a TPS if you have an AFM.
-You should have a couple of connectors on your water thermostat housing, unless you don't have the later model yamaha head, in that case you will need an efi water thermo housing. you could get away without this if you hook-up a variable resistor, acting like a manual choke.
-the oxygen sensor is optional for the microtech i think, well it is for the stock 2tg efi.
-I've heard that some efi computers will work with a points distributer, but you would almost definately need an electronic pickup and coil/ignitor pack. 21R ingnitor packs work with the 2TGEU dizzy and magnetic pickup.
-you will definately need a high pressure high volume efi fuel pump. all of the stuff u listed you will need. you could get away with a surge tank (i have for the past 6mths) but it is recommened that you install one, unless you get hold of an internal fuel pump (in the fuel tank).
rob
PS The microtech computer would take a lot of tuning to get your engine running, when a stock 2TG computer is just plug and play. i have a stock 2TGEU computer and loom spare that i could swap for the microtech if your interested.
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Location:
Nowra ,NSW
Registered:
May 2002
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Re: EFI for 2t-g ????
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Fri, 02 August 2002 11:03
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thanks for help
I have a ct20 turbo i wanna put on after converting to efi, so the computer i've got would be needed right????? the computer i've got was handed down to me from me brother, since he is upgrading to an mtx-8, and i am also getting the coil pack off his rota.
As for the electronc dizzy thing, as you said i would need one of those, which i think i might have to also buy.
i have total NFI about MAP or AFM. Could i just take a few detailed pics of throttle body with digi camera and put them on me website, and then you tell me what i've got and need??????
i know i got a TPS, cause theres a black box near the throttle that says 'throttle sensor' on it!!!!
finally, how much approx would it cost for an auto electrician to wire all this up and tune it????
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Registered:
May 2002
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Re: EFI for 2t-g ????
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Sat, 03 August 2002 04:09
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your microtech computer is fuel only right? so it doesn't control the spark??? i'm not sure you could turbocharge your engine without a fuel+ignition computer to advance/retard the spark when boost hits, you'll have to talk to someone that has done it before. if you find you need a more advanced computer, i'll be here to buy it off ya 
if you've got a tube connection on the side of your computer, then thats where you hook up to the plenuum chamber, thats your MAP sensor, hence no reason for an AFM, otherwise AFMs go between the throttle body and the air filters, and cost around $80 from a wrecker.
you could probably hook it all up yourself if you knew what you were doing and had the wiring loom to your computer. as for getting someone to hook it up... i was quoted $2500 for a full stock efi setup for my 2TG from scratch, and around $400 to wire up a haltech which was the same complexity as your microtech. and getting it tuned... best to call around and get some quotes before you do it all and find no-one will tune it.
rob.
EDIT- just wondering what engine number you got, your 2TG isn't the yamaha head, if its a #222 then its got around 8.8:1 compression, if its the earlier #220 then with 9.8:1 compression you'll have some detonation problems to contend with.
[Updated on: Sat, 03 August 2002 04:16]
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Location:
Nowra ,NSW
Registered:
May 2002
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Re: EFI for 2t-g ????
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Sat, 03 August 2002 07:24
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Yeh in my brothers rota it isn't controlling spark(i think it can though - not sure), but he is running 18 psi on exactly the same ecu atm, so i don't think theres a prob with running this computer and a turbo!
i'm pretty sure i've found the tube connection you talked about and also where it might hook up on throttle body
here's a pic of computer and throttle bdy anyway, please confirm it for me! www.redta22.freewebsitehosting.com/efi.htm , note:it is 18rg tb but will fit 2t-g.
I have the #220 head, i didn't think it had 9.8:1 cr, shit ay, would a thicker head gasket lower it enough to run a reasonable psi????
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Registered:
May 2002
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Re: EFI for 2t-g ????
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Sat, 03 August 2002 09:25
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hmm thats interesting, maybe hes set the dizzy up for it (remap) or something, thats over my head but.
yep the MAP sensor thingo is there, not sure if that computer will work with that TPS because the 2tgeu/18rgeu TPS has like 3 positions, unlike other kinds which measure more positions.
dunno 'bout the head gasket, i bought an 80thou (v think) copper head gasket from a bloke when i had my #220 2tg, he assured me i could run around 10psi with it. the thing cost me $160 but. i was told intercool it, retard spark and don't boost it too much and i should be right.
also another problem with efi is that the later efi model 2tgs had injector cut-outs on the intake ports of the engine. my efi worked without them, but not sure how it really affected my performance. your efi manifold won't bolt onto all of the studs on your intake side, but there will be enough that do for it to hold.
nothing in this world is easy...
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Location:
Nowra ,NSW
Registered:
May 2002
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Re: EFI for 2t-g ????
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Sun, 04 August 2002 04:30
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thanks for your help
i'm gonna ring round to get some quotes for efi, i just hope dad will pay for it, otherwise i'm screwed.
how did your efi'd 2t-g go?? was it fairly quick, or was it just like any other car???? i.e. was it fun to drive?
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Registered:
May 2002
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Re: EFI for 2t-g ????
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Sun, 04 August 2002 06:39
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yeah the efi went alrite, it was very smooth and reliable, started first go every go, and never needed retuning or screwing around with (but i did it anyway to get more performance). The efi had great mid-range, but lacked a little on take off and instant full throttle.
i've gone back to carbies for now, i love the grunty intake sound they make
goodluck with it anyway, if you have any probs just post up.
rob.
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