Reubens Second Single Conversion thread. 56k fail.

[Koom]

 mattapo']

[quote name='suby man said:

i have a 4 plug EJ20H. I hav completed the engine part of the conversion but am completely stumped with how to wire a 3 plug ecu into my car to suit. alot of people have said it can be done by changing a lot of pins and soldering wires. can anyone tell me how to do it? im a noob just following the thread so need a pinout.

/quote]

i'm in the middle of this at the moment, got it to run, kind of. Thinking about going for a link

Are you using all V3 STI sensors etc or trying to use the BG5a ones? It definately is do-able but probably need to swap alot of sensors aswell if you already haven't. Takes much concentration and effort though.

Have you checked the plugs etc since you had it running the other day?

Keep perservering and you'll get there!

[Guest]

 Koom']

[quote name='suby man said:

i have a 4 plug EJ20H. I hav completed the engine part of the conversion but am completely stumped with how to wire a 3 plug ecu into my car to suit. alot of people have said it can be done by changing a lot of pins and soldering wires. can anyone tell me how to do it? im a noob just following the thread so need a pinout.

/quote]

i'm in the middle of this at the moment, got it to run, kind of. Thinking about going for a link

Are you using all V3 STI sensors etc or trying to use the BG5a ones? It definately is do-able but probably need to swap alot of sensors aswell if you already haven't. Takes much concentration and effort though.

Have you checked the plugs etc since you had it running the other day?

Keep perservering and you'll get there!

3 of the plugs do fit. but i havnt changed any of the sensors over. i still have all the BG5a ones. i figured it was the same job as the EJ20R to Single turbo conversion but with a different loom. or are their differences in the engine? i was considering just re-looming with one from an EJ20R then following the pinout diagram in the thread. whats your oppinion on that? im not too fussd about time as long as that would work in the end and the loom is compatable with my engine.

[ReubenH]

The engines can be considered the same from the outside. They have different internals, and performance, but as far as the conversion is concerned, you can consider EJ20H and EJ20R the same thing.

As for the car, i'm not really sure on differences between the 4-plug TT loom and the 3-plug. AFAIK, the 4-plug TT is a half way, a mix match of the old gen 1 4-plug, and the new 3-plug. I.e. old plugs, new sensors. If i recall correctly. a BG5A does indeed have the newer cam and crank angle sensors, and TPS for example. I may be wrong.

As far as running a 3-plug ECU in a BG5A, you will need to change the AFM, Injectors, and possibly the map sensor to match the ECU you put in. If for example you chose an STi 3-plug, you need an orange sticker afm, yellow injectors, and a 3-bar map (i don't know if the BG5A has a 2 or 3 bar map sensor). But if you put in a foz, or EJ20G 3-plug ecu in, that will run grey injectors, and a purple/blue AFM.

As for the specifics of the wiring required to go to a 3-plug, i do not know. We attempted, but were defeated by it. Call it, the left hand not know what the right was doing. But mattapo appears to be successful with his wiring, talk to him. I should probably talk with him about what he's done soon, so we can colaborate and get instructions up for the future conversion thread.

[yellowsub]

hey guys is any body keen in pamily area thts allready done the change from twin to single i scored a sti motor with blown big end as parts just gotta swap head over and bolt everthing up

just missing intercooler bracket and crankcase beather and another rigth hand fuel rail if any body spares

;D

[yellowsub]

dose anybody now i the top engine loom of a sti v3/4 can be used instead of the gtb one? :-X

[Drunkenmonkey]

 yellowsub said:

dose anybody now i the top engine loom of a sti v3/4 can be used instead of the gtb one? :-X

will need re pinning

[mattapo]

 Drunkenmonkey']

[quote name='yellowsub said:

dose anybody now i the top engine loom of a sti v3/4 can be used instead of the gtb one? :-X

/quote]

will need re pinning

which loom are you meaning? the one on the engine? if so yes with a couple wiring changes for the ignition

[yellowsub]

the one thts goes with the intake runs injectors and secners :-\

[mattapo]

the only wires that are different are the coil pack, i think if you do this you only have to change the wiring for the correct boost control at the ecu, just trace it with a multi meter

[yellowsub]

im doing rings and bearings on a sti motor i picked up for cheap and then putting in bg5 legacie with twin to single hopeing to run coil over plug set up intill i see how its conveted till coil pack with leads so im better running gtb upper loom? ???

[mattapo]

 yellowsub said:

im doing rings and bearings on a sti motor i picked up for cheap and then putting in bg5 legacie with twin to single hopeing to run coil over plug set up intill i see how its conveted till coil pack with leads so im better running gtb upper loom? ???

what year leg?

[yellowsub]

1998

[Drunkenmonkey]

 yellowsub said:

1998

follow ruebens conversion threads then your year is the same as ours

[yellowsub]

yeh cool thought its thanks for you help !!!!

[yellowsub]

just gotta get a couple more bits and im all good to go

gotta find another conrod though yet as the number one i pulled from my motor is f u c k e d !!!!!

[rex-leggy]

 suby man said:

i have a 4 plug EJ20H. I hav completed the engine part of the conversion but am completely stumped with how to wire a 3 plug ecu into my car to suit. alot of people have said it can be done by changing a lot of pins and soldering wires. can anyone tell me how to do it? im a noob just following the thread so need a pinout.

have you touched the loom yet or is it still standard?

if its standard and a 7c ecu can you sent me a few pics of the ecu and loom , so i can re pin mine back to standard?

a mate told me it would be easy and he did it but the car dosent start . and he didnt label the cables haha

no1 anywhere has a color code diagram

[ReubenH]

 Drunkenmonkey']

[quote name='yellowsub said:

dose anybody now i the top engine loom of a sti v3/4 can be used instead of the gtb one? :-X

/quote]

will need re pinning

We actually haven't checked yet matt. Still need to multi meter it.

[Drunkenmonkey]

guess what!!

[Guest]

wat?

-smurff

[Drunkenmonkey]

it use to be flaking red now its shiney silver

[Guest]

aahhh i see nice

-smurff

[yellowsub]

heuy guys any body got any ideas on how to get rid of the pain in ass air flow meter without brakeing the bank?? :-\

soon to be converted from twin to single gt/b

-smurff

[Guest]

 yellowsub said:

heuy guys any body got any ideas on how to get rid of the pain in ass air flow meter with brakeing the bank?? :-\

-smurff

?

-smurff

[ReubenH]

broke quote huh?

As for getting rid of the AFM. um. Aftermarket ecu is the only way i know of sorry.

[chrisjunkie]

Do you think that an air leak (as in the massive leak I have on my IC gaskets) will lower fuel consumption hugely?

$50 only gets me 180kms!!