K9VYN [Kevin W]

Fantastic Rob,

Cheers for that. Well, to date they still haven't collected the car [img]images/smilies/mad.gif[/img] (more excuses). The only thing stoping me from really losing it with them is the opportunity to have the STi III engine.

Kev

ps - landmark 555th post on this username (sad, but i noticed it)

[Edited by K9VYN [Kevin W] - 10/1/2003 9:08:52 AM]

K9VYN [Kevin W]

Guys,

This is a fairly urgent query as the engine is scheduled to be fitted to my car next week. I have concerns about running the engine safely with a WRX ECU (Z4 ECU running Prova 16.5 psi map).
An industry specialist has advised against this ECU/Engine combination due to ECU/loom mismatches.

I have however read a thread suggesting that a possible remap of the original ECU is possible to run the STi version III engine, but that its best done on the car. I have mailed you both for further details, but would appreciate anyone's response as it may be of great use to me.

Please advise of the costs of remapping and setting up the car on the road, especially considering that my ECU is already programmable (chip by Scott Taylor)?

Thanks in advance for any useful tips and advice regarding this conversion.

Kevin

K9VYN [Kevin W]

Ok,

So it looks like the plan is this - STi version III bottom end mated to WRX intake manifold. Presumably this can work happily with the modified ECU as mentioned above!? The question now, is which turbo? TD05 or IHI VF10 (RBH52)?

Any ideas?

Kevin

K9VYN [Kevin W]

btt

tweenierob

TD05...
Right.. why not make use of the STI manifold?? as long as you have the complete engine (pipework etc) it would be an ideal opportunity to go front entry etc.
I ran exactly that with the above ECU with no probs.

Rob

K9VYN [Kevin W]

Cheers for that Rob,

The concern is regarding the wiring loom and various connections/plugs. I have been advised by Richard (once of Motec and now TSL/Motec?) and others that this is unsafe and may not connect up and or run correctly/safely.

Did you have to do any remapping to your ECU to run the STi III engine? Also, will the TD05 fit straight on with the 90 degree entry (excuse my ignorance, but i am not sure whether the STi block makes a difference to the turbo attachment/assembly)? The reason I ask is that I am currently stuck with a builder that I don't trust to do any custom work, no matter how simple it may seem.

Kev

[Edited by K9VYN [Kevin W] - 9/25/2003 7:06:54 AM]

MorayMackenzie

Version 3 STI had wilder cams than most subarus up to the current models... But MAF load sensing may be able to deal with that to an extent... however a remap would be a good idea.

K9VYN [Kevin W]

Cheers Moray,

As my ECU does have a programmable adaptor I will certainly be looking to go down that route. Do you think its worth mapping to 95 RON as a safety, albeit I'd be using Optimax or 97 RON and sometimes with a booster?

Cheers,

Kevin

[Edited by K9VYN [Kevin W] - 9/25/2003 2:34:15 PM]

MorayMackenzie

I don't know what the maps look like in the 97 car... but if they are intenally similar to the later ECUTekable ECUs strategies, then, I suspect, you could get the car's base lo-octane map calibrated onto 95 ron fuel and have the high octane map and compensation maps mapped to allow better performance on higher octane fuels... whilst leaving it safe on unleaded.

tweenierob

Sorry Kevin, i did not explain myself clearly enough..

I was running a WRX engine with an STI3 Manifold. This included everything ISCV/Throttle body/Breather pipework/inlet pipe ect.
The only real diffence between running full STI3 engine/ancilleries and full WRX is the TPS which i had to have a throttle closed switch for and the coil packs which i kept from the WRX loom.

The easiest (by far) option for you, is to run with the STI3 engine, using the WRX inlet manifold and ancilleries, this will mean that you can stick with the 90 degree TD05 etc. Remove the 440injectors from the STI manifold and swap these with the 380inj in the WRX fuel rails (straight swap).

Rob

Rob

K9VYN [Kevin W]

Hi Rob,

That's clearer now thanks. Also, I was unaware that the injectors would be so easily interchangeable (again I thought these would also depend on the fuel parameters on the map). This probably won't be a major issue as I can presumably get the adaptor/chip remapped to provide more fuel if its is required (to avoid leaning)?

Kevin

[Edited by K9VYN [Kevin W] - 9/26/2003 7:17:36 AM]

MorayMackenzie

You can't just swap injectors and run without recalibrating the ECUs fuelling.

You may have problems swapping injectors too, if the wrx had an OE 90 degree TD05 turbo from the factory, then the fuel rails are different to the my97 sti 3 ones... i am not sure the injectors would simply swap over. Pavlo could confirm exact injector compatibility details.

K9VYN [Kevin W]

Moray,

I undertsand that the ECU would need remapping and am sure (from reading numerous threads) Pavlo could do this. The concern is as you have mentioned re the swapping of the injectors. It would be nice if they could, but not a necessity as my main concern is getting a working car back on the road.

The bottom line is that the garage have fcuked me about for the last 13 weeks [img]images/smilies/mad.gif[/img] and are now desperate to please, thus avoiding legal action. So, they seem prepared to do whatever I wish re the engine. However I don't trust them enough to change/modify/adapt fuel rails, so won't have the biggier injectors unless they go straight over.

Kevin

tweenierob

They are an exact swap of the old 380's.
And when i say exact i mean the only difference between the two is the colour and the flow rate. I have changed about 5/6sets over so i have a pretty good idea if they fit. the rails are the same size on both manifolds but the mounting points are different, the STI rails mount at the bottom and the WRX rails mount at the top.
But we are not talking about changing the rails here, simply remove the old injectors, grease up the 440's and place them in.

Rob.

K9VYN [Kevin W]

Car is being collected this evening. As far as I know Pavlo can map the ECU on the move. Does anyone have any idea how much this might cost???