i am looking to replace the ecu on my 93 jap import,have seen 2 for sale.the first is a prodrive ecu,the other a gems ecu.which one would give the best overall gains?which one would you recommend?

 

Think you also need to state Pound for pound as the Gems is in a different league all together, Once mapped competently...

Dean

 

I replaced MY93 WRX with a Z4 ECU. But not to sure about the other ECU's

A Z4 will give you about 255 bhp
A 7K will give you about 275 bhp

 

Aye up. Maybe you could help me out. How can I tell if my car has a Z4 ECU? It is a 1995 4 door WRX. I want to be sure because peak boost is about 14.5 PSI, which I believe is a couple of PSI above where it should be for the Z4. I do have a decat and HKS induction kit, which might alter things.

Thanks

David

 

On the same note, can anyone tell me if the UK 1995 4 door has the same Z4 ECU as the WRX?

Thanks

David

 

To find out if your car has the z4 :
One way would be to check for the following:

taken from a website the series 2 mk1 impreza had the following revisions:

"variable speed wipers
increased power to 260PS (z4)
electric aerial
upgrade cloth seats
wheel size increased to 16"
Electric retractable mirrors"


Alternativly , the easy way , just lift the passenger side carpet in the foot well, remove the 4 or so screws securing the kick plate and have a look at the markings on the ecu.
Sure enough if it is a z4 it will say .......yep you guessed it ...z4 on it

I would recomend this upgrade as it safe provided it is used with optimax.
a nice jump from 240 ps to 260ps expect to pay 150 - 200 for the ecu which are frequently found on here and dare i say it ebay - errrw


Andy

 

is the z4 a direct replacement i mean just swop it over and all works or do they need setting up etc sorry im new to all this, i also have a 93 jap import and confused as to what bhp it should be
xvw

 

Assumming I have a Z4 (will check), it's well worth it. I'm getting 282bhp out of my car and it's only supposed to be 260 on Japanese fuel! These babies really go some....

David

 

Staright swap - plug and play - no set up. The z4 ecu is a far better tune over your original 240 ps tune. You must use optmax or equiv though.
With other mods like d cat exhaust you can easily see 280.


Like my wagon
96'
mods are:
td05 turbo
z4 ecu
full scoobysport d cat
polishied heads
knocklink

Ideally you could get a custom map for around £600 which will give your more power and it will be set up to run on normal super unleaded.
Not sure about the other ecus you mentioned. I would check. I know that the speedo control is different on a uk car
Andy

 

cheers, i'l have a look to see if i already have the z4 the car i have has obviously had a few things done to it prior to being imported in 2003 if not i'l be on the look out for one, plug and play sounds good
xvw