2fardown

I can definitely notice the power loss. Put it this way, I can't even here the turbo whistle at all, only when the vehicle is reving past 4,000rpm. If I am coasting along at 60km-70km and I plant my foot, the car drops down a gear and goes like an Excel.... Where as before the thing would go like a cut snake and even loose traction.

So I better start looking for a second hand rear muffler then.... Geez this has been more trouble than its worth.

Could anyone explain why removing a restriction like a muffler decreases performance on a turbo car like the XR6? I have always been under the impression that turbo cars benefit from less restriction in the exhaust? This being my 3rd turbo car, I'm not what you call a newbie. Fair enough if I still had the factory mapped ECU, but with the edit I thought this wouldn't be the case.... Very confused.

Ok guys. I'll start by quickly introducing myself. I've recently purchased an XR6T auto. Mods so far are Capa Edit 8psi Map and K&N filter. My previous car was a 200sx S15, so as you could imagine I am extremely happy with the torque and power delivery of the 4L DOHC donk. Anyway... back to the problem at hand. I decided to book the car in at my local exhaust shop to remove the centre muffler. I wasn't in the best frame of mind at the time and must have said something about the rear muffler, however meaning the centre muffler. So I get the car back and he has removed the very rear muffler and replaced it with 2 x 2 1/4 pipes with the old tip welded on. I thought I would try it out and see what it was like. How dissapointed I was, immediately I noticed a drop in mid-range power. Top end did improve however. It was quite amazing how much affect this has placed on the performance of the car. It's like there is major turbo lag all the way to 3,500rpm. So I rang the exhaust shop and explained my / there mistake and he was very good about it, told me to bring it in the early the next morning. So today I have dropped it off and he is going to remove the centre muffler and replace with 2 x 2 1/4" bends with resonators. He mentioned that he will keep the other mod in place so that leaves only 2 resonators in the entire system. Obviously this is going to be a bit loud. The question I am asking is, has anyone else performed a similiar mod and are happy with the performance and sound? I can see myself taking it back and getting another muffler or resonator put on the rear to quieten it. It's amazing how something so simple has turned to sh!t. I suppose it's my own stupid mistake. I feel like throwing the entire cat back to the sh!t heap and purchasing a pre-fabricated system. Any feed back relating the sound and performance affects would be appreciated. Thanks.

Haha classic. He has probably posted a thread on a Merc forum somewhere telling how the XR6 had him until 110km but then flew past him........

Maybe they'll bring out a turbo coupe to rival the monaro? Boost the power to 300kw.

I'd have to agree. The 17's on the MKII look a lot better. Congratulations on your purchase.

Have you tried connecting a Disc-Man or something similiar into the Aux port? Does it do the same? It could be that you have worn the Aux Jack and it needs replacing.

How about someone on their next dyno run puts their stock filter in and performs a comparison showing the difference. That will satisfy me.

Wonder what it would like with tinted tail lights??

We aren't with Bigpond but with Telstra (not the same as home users) and use a 2mb fibre connection. I'll perform a traceroute next time there's a problem to see where it's stopping.

I experience exactly the same problem. Could be a load issue.