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Old Aug 30, 2009 | 12:51 PM
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hi every1 can i take my td04 off my wrx import 94 and replace it with a td05 is it a straight swap and will it make much diffrence i have fmic boost controller turbo back exhaust and filter any help would be appreciated thanks
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Old Aug 30, 2009 | 01:00 PM
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its a direct bolt on if the compressor housing are the same, i think they changed from a 90deg angle to straight circa '98

you will only see you car is driving leaner and therefore will need a remap.

if both turbos are running 18PSI the TD05 will be pushing more compressed air and more, however you have not told the ECU to put more fuel in so more air and standard fuel into the engine its then running lean
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Old Aug 30, 2009 | 01:10 PM
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I take it you have a 1994 WRX Wagon then? 'Cause if a saloon, the turbo IS a TD05H.

Cheapest way to be 'safe' would be to fit the 90-deg inlet TD05 and a WRX saloon's ECU. The Z4 is the one that apparently works best and with higher target boost. It's rated at 260PS (256bhp).

Or try to get hold of a 2nd hand PP-chipped ECU for around the £80 mark - even safer fuelling/timing and designed around UK 97 RON.

Last edited by joz8968; Aug 30, 2009 at 01:12 PM.
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Old Aug 30, 2009 | 09:36 PM
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Default chip ecu

Originally Posted by joz8968
I take it you have a 1994 WRX Wagon then? 'Cause if a saloon, the turbo IS a TD05H.

Cheapest way to be 'safe' would be to fit the 90-deg inlet TD05 and a WRX saloon's ECU. The Z4 is the one that apparently works best and with higher target boost. It's rated at 260PS (256bhp).

Or try to get hold of a 2nd hand PP-chipped ECU for around the £80 mark - even safer fuelling/timing and designed around UK 97 RON.
i have a chip stage 3 for sale
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Old Aug 31, 2009 | 02:10 AM
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my impreza is a saloon so it must have the td05 thanks for the help everyone
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Old Aug 31, 2009 | 08:48 AM
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Originally Posted by rewindnottm
you will only see you car is driving leaner and therefore will need a remap.

if both turbos are running 18PSI the TD05 will be pushing more compressed air and more, however you have not told the ECU to put more fuel in so more air and standard fuel into the engine its then running lean
So why the hell will it run lean, stop propogating forum BS, the maf measures the airflow, the amount of fuel is calculated suing the required AFR, fuel is injected, same AFR.

Simon
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Old Aug 31, 2009 | 12:01 PM
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Originally Posted by foskitt
my impreza is a saloon so it must have the td05 thanks for the help everyone
You can visually check...

You should be able to see a load of cast writng on the ally compressor cover... the lowest line of it should begin "TD05H...". If it reads "TD04L..." then someone must've fitted the smaller turbo from a JDM Wagon (seeing as yours is a JDM saloon).

Last edited by joz8968; Aug 31, 2009 at 12:03 PM.
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