STI ECU Install
 

Hey guys, need to get a STI ecu fitted to my 99 WRX. I am about to drop in a 99 STI engine and need someone to install the ECU. Can anyone recommend a place to do the job. Does anyone know a rough estimate on how much it would cost and can the STI ecu be tuned?

Regards Brendan

Ecu cannot be flashed for 99-00 Gc8 sti..... Power FC or Possum Link are the cheapest options for tunable ecu for that era of Sti.

is it jap spec ecu?.....if so it's tuned for 100 ron.

Yeah, It's a 99 Jap STI ecu. So are you telling me i need to get a power FC or possum link to get my engine to run properly? I read somewhere else that there could be possible pinging on 98 oct.

If you want have your car tuned, as in max possible power for any modifications then you'll need to go for a Possum Link or Power FC.

99-00 Sti ecu cannot be flashed (re-programmed).

Your engine will run fine on 98 with the Jap ecu, just don't boost past 16.5 psi and all should be good.

I'd be doing a fuel pump before running the STI engine & computer though(It's cheap insurance against a lean out).

Thanks for the advice, I never thought about the fuel pump. I'm trying to get as much information as possible so i don't ruin this engine. :D Would you reccomend a place to get the ecu fitted?

ASG in Malaga

Can anyone tell me a really good fuel pump to use. I know walbro and bosch are good but does anyone know the model of pump best suited. Cheers

Walbro xx342. Can't remember what the xx letters are, but the last 3 are 342. It's a 255l/hr (500hp) drop in, plug up fuel pump

Thanks a lot, i'll take a look on ebay and see if i can order one. I seem to buy everything from there these days

Skip ebay and buy it locally. There were a few fakes going around at one stage. Pay the extra few dollars for peace of mind.

[QUOTE=reflexwrx]Thanks a lot, i'll take a look on ebay and see if i can order one. I seem to buy everything from there these days[/QUOTE]

Vision R in O'connor has the Walbro you need.

I have a Bosch 044 in my Sti (personal prefrence) but more $$$ and not a direct fit.

Nothing wrong with these guys, 99.9% feedback.........GSS342 $155 to your door & should plug straight in, just make sure you use your old sock.

[url]http://cgi.ebay.com.au/WALBRO-GSS-342-FUEL-PUMP-NISSAN-SKYLINE-SILVIA-200SX_W0QQitemZ370130778895QQihZ024QQcategoryZ33549QQssPageNameZWDVWQQrdZ1QQcmdZViewItem[/url]

[QUOTE=Pimpreza]just make sure you use your old sock.[/QUOTE]
Can I just ask why that is? I mean does it not come with a new one, or is it too big etc?

Not sure what the old sock is for. Can you please elaborate. I have plenty of old socks but I like to use them for my special meditation time in the evenings. :nono:

[url]http://www.prospeedracing.com.au/products/Walbro-Fuel-Pump-Upgrade-Kit-%252d-Subaru-WRX-94%252d00.html[/url]

using the new fuel pump pickup (sock) can cause surging issues

[QUOTE=jEstEr?]using the new fuel pump pickup (sock) can cause surging issues[/QUOTE]
[QUOTE=Pimpreza (from a PM)]the reason you have to use your old sock is because the ones that come with the Walbro usually come out at 90deg whereas the Subi one slopes down at about 40deg so you get better pickup, just a matter of popping a small clip off & re using it......should only take 20min to do the change over, just make sure you unplug the power under the back seat before you start. You'll probably have to twist the rubber hoses on the tank with a pair of pliers before you can slide them off too.[/QUOTE]
yea, that's why :)

I'm keen to hear about these possible surging issues. You would think the sock would have no effect on the rate of fuel delivered to the engine. If anything you would think using the old sock would be risky due to it being dirty or worn.

if i have less than 2/3 of a tank of fuel and go left while nailing it mine will cut out... it only gets worse from then on aswell, at under 1/4 ya just cant hammer the car.. i have a bosche 044 i think...

REFLEXWRX,

Buy a Walbro GSS 342, easy DIY.
Trust us YOU HAVE TO use the old fuel bag/sock as the ones that come with the Walbro are tiny.

As for the ECU, the quick easy way would be to find a member with a Oz Spec V6 ECU and throw that in. I'm sure there will be a few around.
You will then need an Air Inlet Temp Probe wired in if you transplanting into a WRX, such as the one pictured in this thread.

[url]http://www.perth-wrx.com/vb/showthread.php?t=23870&page=1&pp=10[/url]

The other option is to just fit what you have a get the car on a dyno to check air/fuel mixtures and any detonation problems. Even maybe fit a manual boost controller if need be if the Jap Spec ECU will tolerate 98 RON fuel.

J

Well, that’s given me something to think about. I thought it would be plug and play with this bad boy but looks like I'll need to think about my options. If I went for a Power FC with hand controller would that mean I would no longer need to get my ECU fitted? Would it be a good idea as it looks like I'll have problems with this Jap tuned ECU. If I am going to have to find a Version 6 ECU and get it fitted should I save the money on doing that and invest in a Power FC and have full tuning capabilities. Would this be a feasible project or would the price difference be quite significant. I know the cost of a Power FC but have no idea on installation and tuning costs.


Regards Brendan