Japanese WRX - Your Thoughts

siscu · Ricer Joined: 07 Jan 2008 Tech posts: 15 My 2NRide:

Hi guys,

Some of you were very helpful last year in providing me with info about my WRX Tiptronic bugeye and I now have further questions to test your knowledge on.

In the uk, there is an argument going on about imported jap cars and their speed limitations. We know that the jap cars are limited to 215mph but what the argument is over is how to resolve this problem.

Some people over here think that a 'deristrictor/converter' will remove the limiter and the car will then be able to go faster without further work required.

Other people suggest that the jap ecu's were not programmed beyond 215mph so when they begin to go past it they don't know what to do thus the limitation of speed. This group of people suggest the only way to get round this problem is to get a remap for the ecu so the engine knows what to do past 215mph.

My jap WRX has supposedly had this de-restriction process performed on it before i bought it but it certainly won't go past 215mph.

Can any of you confirm or deny this argument?

Thanks in advance.

Si

siscu · Ricer Joined: 07 Jan 2008 Tech posts: 15 My 2NRide:

doh!

I mean 115mph Rolling Eyes

Knight1 · Posted: Fri Mar 07, 2008 11:18 am Post subject:

Sounds strange. I've seen local STi's (JDM) run past that speed (I imagine) with the removal of a speed cut via a reflash to remove it.

Top speed on the JDM IIRC is 238-240 km/h due to lower top end gearing than the STi.

siscu · Ricer Joined: 07 Jan 2008 Tech posts: 15 My 2NRide:

cheers knight.

Are you saying the reflash removes a limitation that currently exists or does it add the info for the ecu because it was never there in the first place?

Si

Knight1 · Posted: Fri Mar 07, 2008 11:46 am Post subject:

I was under the impression that it merely removes the limit.

Not that it has to add additional "map" info.

I don't think the map on your ECU works with a "Speed" in mind...more like RPMS, Throttle position, and engine load. So at your top speed, you'd have a certain RPM and Engine load, not unlike that seen if you "run out" 4th gear say <<<<,Top speed would be just like that...but just at 5th gear (for a WRX).

siscu · Ricer Joined: 07 Jan 2008 Tech posts: 15 My 2NRide:

thanks again knight.

i will have to try and locate this so called delimiter in my engine and see what it is and if it is doing anything.

thanks

JWT · Posted: Sat Mar 08, 2008 10:15 am Post subject:

yes a reflash will remove the speed limit as well as you can increase your rev limit also

bets thing to do is actually have the car reflashed by a qualified person and from thee see.

i strongly suggest installing a wideband on the car eg the AEM wideband with guage just to monitor the engine as well as an oil pressure gauge

Knight1 · Posted: Sat Mar 08, 2008 4:31 pm Post subject:

STi-N · Posted: Wed Apr 09, 2008 9:29 pm Post subject:

^doesnt