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The Single Conversion Thread - 3.0


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#61 boostin

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Posted 14 August 2013 - 9:25 AM

Yeah put the right ECU in and see.
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#62 gt legacy

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Posted 14 August 2013 - 9:48 AM

So wil i have to change my wiring lik it shows on hea or wud it just plug straight in and go

#63 Reuben

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Posted 14 August 2013 - 10:07 AM

Can you please write in English, txt speak is not really welcome on these forums.
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<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


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<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#64 gt legacy

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Posted 14 August 2013 - 10:25 AM

Ok man sorry about that

#65 gt legacy

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Posted 14 August 2013 - 11:23 PM

Yeah put the right ECU in and see.

i was just wondering if the ecu from a 1990 gt legacy would work on my car as my ecu is 4plug and and so is the ecu in my 1990 wagon

#66 Reuben

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Posted 15 August 2013 - 7:17 AM

Negative, they share the same plugs, but sadly totally different pinouts. In fact, the twin turbo 4-plug has more in common with a single turbo 3-plug, than it does with a single turbo 4-plug.

The biggest issue with single turboing the BG5As is most certainly the wiring. It's a pig of a job, and sadly something I know very little about. I've once attempted to re-pin for a 3-plug, and failed miserably. Others have done it fine, but, they aren't on this forum... It's something that requires a bit of research.

Unless you are a wiring guru, BG5As are not worth the time and effort, the Bs and Cs are a much much better starting point, and are the easiest to wire up.
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<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#67 gt legacy

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Posted 15 August 2013 - 8:38 AM

Ok thanks for the info

#68 Reece

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Posted 19 October 2013 - 4:50 PM

what is the reasoning behind grounding b12+b18 as they are already grounds?

#69 Reuben

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Posted 19 October 2013 - 11:38 PM

No idea, I was told to do that when I was researching mine and rolled with it. Have a look at a gc or legacy 3-plug pinout.
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<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#70 Reece

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Posted 20 October 2013 - 9:19 PM

still working out some niggles, seem to be getting boost/fuel cut at 10psi even with a electronic boost controller

#71 DacerX

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Posted 20 October 2013 - 9:25 PM

have you got the right boost pill thing, flat4 was having the same issue
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#72 Reuben

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Posted 21 October 2013 - 5:04 AM

If using aftermarket boost control, pills are not used. Plus boost cut, and simply not boosting are two different things.

First question I always ask when the cars don't boost after the conversion, have you tested continuity between the ECU and the boost controller? i.e. have you swapped the boost control pin on the ecu, since the TT's boost control wire goes to the left inner guard, as that's where the boost control solenoid is, NOT the right strut tower. The confusion arises from the fact there is a boost control solenoid on the strut tower, like on a single turbo, but it's not a boost control solenoid. In the twin turbo it's the secondary exhaust actuator solenoid, so has a different pin not used by the single turbo ECU's. Just need to move that pin to the boost control pin on the ECU. That's what the whole swapping A19 and A3 thing is all about, because physically it's basically the same as a normal boost control solenoid.
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<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#73 matdaymon

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Posted 29 December 2013 - 4:52 AM

In theory the single conversion should work the same with an auto BD/BG5B onwards right? Or are they the troublesome single plug of doom?
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#74 Drunkenmonkey

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Posted 29 December 2013 - 8:54 AM

Single plug of doom I believe
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#75 DacerX

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Posted 29 December 2013 - 7:26 PM

dam single plug. reloom time.
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#76 Reuben

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Posted 29 December 2013 - 10:22 PM

Thankfully a loom would be plug and play though, so dead easy. But you'd have to manual convert at the same time. It's best just to not buy an auto BG, basically. How hard can it be?
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<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#77 DacerX

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Posted 29 December 2013 - 11:39 PM

yeah i had a auto bg that was then manual conversion and then wanted to single turbo.........gtb reloom.....the nightmare still haunts me
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#78 matdaymon

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Posted 30 December 2013 - 3:17 AM

Thought as much. Shall continue to avoid auto BD/BGs like the plague
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#79 Reuben

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Posted 31 December 2013 - 9:54 AM

Yeah, just start manual, and you save a lot of arse ache. Unless a killer deal pops up really...
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<Shale>: Blighter doesn't really have an accelerator pedal, it's more just a loudness pedal. You can change volume, but you won't go any faster.


<mjlqtown>: (Southern US accent) I'v excised the demon! This car is now clear!


<Reuben>: I feel like when you stomp the throttle in Blighter, it's like you've startled an old man!

#80 Oscar

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Posted 12 July 2014 - 5:12 AM

Thinking outside of the box time.

I reckon it is possible to do a single on a BD/G5a and I think I have an idea on how to start off doing it. More tricking the ECU into thinking it has control over everything when in reality it doesn't. The same could be done with the B and C but considering how conversion friendly the 20R wiring is, it wouldn't be worth it as a viable alternative.

My own parallel twin project is still going some 2 years later even though the last time anything was properly done was Easter 2013.

Pull your handbrake just enough so the light comes on. That sends the ECU into full race mode.

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