ARC or ARY ?

DubGTI · Post by **DubGTI** » Tue Aug 15, 2006 10:00 pm

Whats the difference between the two engines ?

Petrified · Post by **Petrified** » Tue Aug 15, 2006 10:29 pm

do you mean AVY?

Prash · Post by **Prash** » Tue Aug 15, 2006 10:38 pm

The newer AVY engine conforms to certain emmisions regulations (that came in about May 2000) that the earlier ARC doesn't. I don't think there's any physical differences apart from the mapping of the engine, where the AVY engine has a small dip in power the between 3.5 to 4k odd mark to reduce emissions (as this is the engine speed where the emmisions would be tested).
I think thats all there was, sure someone will confirm anyway !

Petrified · Post by **Petrified** » Tue Aug 15, 2006 10:46 pm

I'm sure they will both have the same torque dip.. even mk4 polos have that.

I think like the 1.4 16v engine that the older one may only have one lambda probe on the downpipe where as the newer one will have two.. one on the cat also.

if that is the case then you should be able to decat an ARC but not an AVY because the ecu will complain..

may be wrong though.

olop_chris · Post by **olop_chris** » Tue Aug 15, 2006 10:51 pm

Couldn't you blank it off if you wanted to decat to stop the ECU having a nightmare?

Dammit having an AVY lol

Tigz · Post by **Tigz** » Tue Aug 15, 2006 11:58 pm

olop_chris wrote:Couldn't you blank it off if you wanted to decat to stop the ECU having a nightmare?

No because the sensor wouldn't have anything to read so it throws the Check light on, and at worst throws the car into safe mode.

Well, at least thats the case with the Loop GTI.

ICEYPOLO · Post by **ICEYPOLO** » Wed Aug 16, 2006 1:14 pm

CymruPolo wrote:All I know is you can't re-map or chip an ARC engine.

i've got custom code on my ARC engine...

Si_GTi · Post by **Si_GTi** » Wed Aug 16, 2006 2:08 pm

ICEYPOLO wrote:
CymruPolo wrote:All I know is you can't re-map or chip an ARC engine.
i've got custom code on my ARC engine...

Its a chip though... isn't it? I understood that JBS couldn't flash the ECU in an ARC engine?

ICEYPOLO · Post by **ICEYPOLO** » Wed Aug 16, 2006 4:05 pm

Si_GTi wrote:
ICEYPOLO wrote:
CymruPolo wrote:All I know is you can't re-map or chip an ARC engine.
i've got custom code on my ARC engine...
Its a chip though... isn't it? I understood that JBS couldn't flash the ECU in an ARC engine?

yeah it is a chip mate... but cymrupolo said you cant map or chip an ARC engine... you are right it cant be flashed via the dignostics (OBD2??) port.

Si_GTi · Post by **Si_GTi** » Wed Aug 16, 2006 5:41 pm

Ah ha, I misread cymrupolo's post in my haste earlier

Cheers

DubGTI · Post by **DubGTI** » Thu Aug 17, 2006 10:39 pm

Tigz wrote:
olop_chris wrote:Couldn't you blank it off if you wanted to decat to stop the ECU having a nightmare?
No because the sensor wouldn't have anything to read so it throws the Check light on, and at worst throws the car into safe mode.

Well, at least thats the case with the Loop GTI.

You can get an 02 cheater tho, it's basicly a resistor in place of the 02 sensor that shows normal readings (as if there was a sensor in place)

Then your light wont come on