Modified OEM Muffler 996TT
#511
Excellent. Thanks for the info.
Background: I recently purchased the Turbo S. (LOVE it so far). But it came with a Race Precision aftermarket exhaust system. Generally, I don't mind the sound except for a fairly radical drone/resonance at about 2500 rpm. (Wife won't even ride in it)
I am thinking of reinstalling the OEM exhaust which I got with the car when I purchased it. Not sure if I can do this myself which is why I was asking about the weight. Also, the OEM muffler does have the drilled holes already done. So it will not be as quiet as the unmodified exhaust.
Sounds like a 2 person job in any case.
Background: I recently purchased the Turbo S. (LOVE it so far). But it came with a Race Precision aftermarket exhaust system. Generally, I don't mind the sound except for a fairly radical drone/resonance at about 2500 rpm. (Wife won't even ride in it)
I am thinking of reinstalling the OEM exhaust which I got with the car when I purchased it. Not sure if I can do this myself which is why I was asking about the weight. Also, the OEM muffler does have the drilled holes already done. So it will not be as quiet as the unmodified exhaust.
Sounds like a 2 person job in any case.
If by 2 person job you mean yourself and a beer, I agree. You'll have no problems swapping it back over,.
#513
I went the the tail pipes w/ a 1 7/8" hole saw. Took out as much if the inner pipping that I could. That was better then stock but wasn't good enough IMO. Then I removed the cat closest to the turbo. It's the easiest to get to after I got the exhaust off. Better sound but I wanted more. Took the exhaust off to change the water pump and so I drilled out about 1/3 if the secondary cat. Agin some improvement in the sound but in the end, IMO, if you want the right sound get an after market exhaust. Though I like mine the way it is way better then the stock OEM exhaust.
#514
I did this mod yesterday and so far I'm quite happy with the result. Did not take long with a decent Milwaukee 1/2" drill and a carbide burr. Hardest part was just making the initial hole.
Thanks for the great tip!
Thanks for the great tip!
#515
Just finished replacing the OEM exhaust back on to my 911. It already had the holes drilled. Very happy with the sound. There was a Race Precision aftermarket exhaust on it which had a little more sound than I like. I can tell a slight power drop, however.
Anyway, very happy with the drilled out OEM exhaust system!
Anyway, very happy with the drilled out OEM exhaust system!
#521
Just TJW'd my exhaust. Hmmm, jury is still out on my final thoughts. I love the idle. I love the WOT sound, drones at 2000 RPM exactly. Not like my Hemi Challenger but it's not quiet either. Not sure about the HP/TQ gains because I haven't had time to really go test it. Tip trans.
I used a Milwaukee bi metal hole saw 1 1/2" on a 12" extension. Didn't even have to remove my X54 tips. Took 20 minutes tops, but definitely needed two hole saws.
Wife didn't even mention the sound difference so its quite enough I guess, lol.
I used a Milwaukee bi metal hole saw 1 1/2" on a 12" extension. Didn't even have to remove my X54 tips. Took 20 minutes tops, but definitely needed two hole saws.
Wife didn't even mention the sound difference so its quite enough I guess, lol.
#522
Now that I've driven some more, I will say that I think this is a pretty good mod as an alternative to the quiet sound of the stock exhaust. I don't have access to a Dino but I did some 2000k to 6000k pulls in 2nd 3rd tonight and I will say that there was a small but noticeable increase in HP/TQ during these pulls, so the 10-15HP and 20-30TQ seen on Woosh's dyno can be felt. Interestingly, I saw .8 on the boost for the first time. I know some reported more boost so I don't know if I am seeing that or if this is an anomaly, but I've never seen .8 on my gauge and I could repeat it each pull. For a low budget easy mod I'll take it! Another happy TJW'er. Thanks guys for being pioneers on this.
Cheers.
Cheers.
#525
I agree...great thread! Its always interesting to see what people do/how far they can go with the stock setup. I just did straight pipes and will be keeping the stock exhaust for emissions requirements. OR if i just get tired of the straight pipe drone one day! Lol Here's what i am doing to the stocker...
I really would like to cut out the clam shell part that sits right after the cat but i dont think i can get a tool in there to do it...at least not with the access hole i currently have. We'll see though, i may still cut more of the body out and do more work. Doing more work might not make any noticeable differences in power though...who knows. The red is the cut i would like to make. The blue is exhaust flow and the green is the plate i will weld to the body to seal it back up. As it sits...the exhaust will come out and slam right into that flat section and then exit out. I imagine this would sound similar to a catted straight pipe system...just more ghetto looking. Anybody ever done the mod this way??
Regards
Scot
I really would like to cut out the clam shell part that sits right after the cat but i dont think i can get a tool in there to do it...at least not with the access hole i currently have. We'll see though, i may still cut more of the body out and do more work. Doing more work might not make any noticeable differences in power though...who knows. The red is the cut i would like to make. The blue is exhaust flow and the green is the plate i will weld to the body to seal it back up. As it sits...the exhaust will come out and slam right into that flat section and then exit out. I imagine this would sound similar to a catted straight pipe system...just more ghetto looking. Anybody ever done the mod this way??
Regards
Scot