i have just changed my ecu in my 94 wagon uk to a z4 ecu. will it be ok running on optimax with no booster and do i have to take it easy for a while like you do when warming up.

 

What turbo is on your wagon? That Z4 is mapped to run a TD-05.

To answer your question, I ran a Z4 with optimax/sul and no booster and had no probs. Reset the ECU to get the best from it.

 

It would be advisable to have your AFRs checked on a wide band lambda and fit a Knock Link. I assume you have a boost guage. If not get the boost level checked when checking your AFRs. There may be more to come.

 

uk wagons run the tdo5 upto a 96/97 so i was told, afrs and knocklink lost me mate and i dont have a boost guage,could you explain a bit more sorry for ignorance but not very mechanicily minded.

 

Boost guage: To measure what boost you are running and related to what the standard car runs.
AFR: Air Fuel Ratio. Between 14 and 15 : 1 off boost. 13 : 1 on boost and 11.3 : 1 at 1.5 bar all approximate and depending on engine.
Knock Link : A guage that detects pre-ignition or detonation. Cost £120 - £150. Available from BRD and others.
DET is a bad thing and ruins engines.
Running lean results in high EGTs and also ruins engines.

 

ok cheers harvey will take it to get it looked at could any garage do these checks or would a performance garage be better.i have had the z4 in now for 2 days and i have been taking it easy barley going above 3500 revs and i can feel a difference seems alot sharper and picks up alot quicker than standard

 

Where are you located?
It needs to be someone with a wideband lambda, preferably with Subaru experience but certainly with turbo experience.

 

im in lancashire border of greater manchester