i have now found out what ecu i have and to my surprise i have apparently got a wagon ecu in my93 saloon...........................am i losing out here or what?.........if i bought a z4 ecu would it be plug n go?......thanks

 

what ecu have you got in your car? Also what turbo do you have fitted..is it a td04 or td05

 

i have looked for the first time about an hour or so ago as i want a z4 ecu and it has "3b" on it..............not sure bout turbo but its a my93 wrx saloon.............just dont understand why i have a wagon ecu in it?!

 

You will be running only 10.8psi dropping quite quickly down to 6.8psi
A WRX Saloon should be running 11.47psi held boost if it's a Pre Sept 1994.
If post Sept 94 and running a Z4 then is will run 12.7psi.

 

Cheers Scott..............Yea i figured as much, when the car was under warranty after i bought it in November it was overboosting quite badly so i took it back to them and they said it had a dodgy ecu in so have put a standard one in and obviously i had no reason to doubt this but did notice it was slower. However its only now that i realise the score and im livid!!............the thing is it runs fine so by putting a z4 in will it upset things?......any help would be great

 

Someone may of removed the restrictor from the boost control return hose. this can cause it to overboost, especially if a decat has been fitted.

check the very bottom hose from the boost control solenoid (cylinder thing on driver side strut with 3 hoses, 1 in top, 1 in side and 1 in base, and 2 wires attached).
The hose that comes from the base should connect to the big black resonator box on the air intake. Inside this hose is a small brass restrictor.

it's quite common for this restrictor or even the hose to be removed completley, especially if an induction kit is fitted.

A bit more info here : Frequently Asked Questions

 

Thanks Scott, it does have decat system and an induction kit...............i will check what you suggested..............so my car is clearly quite a bit slower than it should be?!!

 

The z4 won't upset the car (i'm running 1 in my 93 wrx with a vf12 turbo (old legacy turbo) it should be a td05 (which is what the z4 is mapped for).
If you look at Scotts website you can see what he can do for performance wise.
If you need a standard 93 ecu i have 1 spare (code W6 or U8 can't remember) if you want it just pm me.