Fg "restrictor Ring"

[ovaxitd]

ok, im kinda new to these still and looking at simple mods,

one thing I keep reading is this "restrictor ring" - however I am yet to see a pic or what people are actually removing?, bit like a unicorn... people talk but no proof

does anyone have any more info/ pics on this at all?

cheers

[Smackers XR6T]

My Euro4 complaint F6 had the "ring" in the exhaust after the cat convertor (near the bolt up flange) Basically its a just a welded in ring that reduces the exhaust size down to approximately 2 1/2" (0r 63mm).

Apprently it was done to restrict exhaust gas flow slightly to speed up heating of the larger cat con which helped the July 2010 onwards turbo models meet Euro4 emission requirements.

I removed the ring from my car by grounding the welds out with a die grinder and remove the ring and then refitting the cat/engine pipe assembly to the car.

Edited 24/06/12 01:15 PM by Smackers XR6T

[neotim]

Did you notice any gains after taking it out? I have to get mine removed because its robbing me of HP at the moment.

Edited 25/06/12 02:14 AM by RHR
quote removed

[Smackers XR6T]

There was about a 8 rear wheel killowatt gain after removal of the exhaust ring on my car (back to back dyno runs were done on the same day).

The car was a otherwise mechanically stock F6 at the time of doing it.

Edited 25/06/12 02:14 AM by RHR
quote removed

[ovaxitd]

Thanks for the swift feedback fellas I have a 5/2010 euro 4 g6et and hear of this ring, trying to see what I can do that's easy/cheap and helping flow is main priority, this ring sounds like a sh!t idea by ford and ill be dropping pipe off and checking/grinding mine out too.

thanks for your confirmation. ill post pics when I complete this.

tristan

[ovaxitd]

Edited 24/06/12 06:15 PM by ovaxitd

[Smackers XR6T]

yep that's the little restricting sucker.

Are you positive yours is a Euro4 build car? I thought they didnt start building Euro4 until June 2010 in readiness for the July 1 2010 compliant date.

Easy way to tell is by looking at where the cat is fitted. On a Euro4 turbo falcons its mounted more upright close to the turbo and is a larger roundish type unit, where as Euro3 turbo models have a more flatter style cat with is mounted more underneath the car. If that makes sense.

No real harm or effort in unbolting the exhaust from the back of the cat and just having a look anyways.

[dre]

You might be right about that.

Mine was 05/10 and euro 3.

Easiest way to check is just look at the badge on the steering wheel.

Euro 3 was a ford badge, euro 4 was an fpv badge.

[Smackers XR6T]

The original poster stated he has a 5/2010 G6ET, so it wont have any fpv badges on it but you are correct for Euro4 Compliant fpv's though.

Edited 25/06/12 02:15 AM by RHR
quote removed

[Pazzo]

So being after cat, does not require a retune?