The Drone is unreal! Help!
09-02-2009, 12:14 PM
#41
Burning Brakes
09-02-2009, 12:32 PM
#42
i had a guy from a different shop telling me to install an aluminum resonator to save a few bucks, and the aluminum "should last me a long time". i was thinking "wtf...my complete system is stainless steel which i paid a good dollars for...and now i am gonna cheap out!?" 
09-02-2009, 01:46 PM
#43
This is fantastic news! I was just guessing that the 6" dia. muffler would fit, but I am psyched that this eliminated the problem. I still have the factory cat, but hopefully it achieves the same result. Thanks for helping us out.
Not to change the subject, but while re-reading the thread from the introduction of the XLR8 exhaust, it was mentioned that the resonated cat-backs would start coming with a pre-resonator cone to make the res more effective, straight from Billy Boat (post #347, page 9). I peeked in mine before instalation, and no such cone. What gives?
Not to change the subject, but while re-reading the thread from the introduction of the XLR8 exhaust, it was mentioned that the resonated cat-backs would start coming with a pre-resonator cone to make the res more effective, straight from Billy Boat (post #347, page 9). I peeked in mine before instalation, and no such cone. What gives?
09-02-2009, 02:15 PM
#44
This is fantastic news! I was just guessing that the 6" dia. muffler would fit, but I am psyched that this eliminated the problem. I still have the factory cat, but hopefully it achieves the same result. Thanks for helping us out.
Not to change the subject, but while re-reading the thread from the introduction of the XLR8 exhaust, it was mentioned that the resonated cat-backs would start coming with a pre-resonator cone to make the res more effective, straight from Billy Boat (post #347, page 9). I peeked in mine before instalation, and no such cone. What gives?
Not to change the subject, but while re-reading the thread from the introduction of the XLR8 exhaust, it was mentioned that the resonated cat-backs would start coming with a pre-resonator cone to make the res more effective, straight from Billy Boat (post #347, page 9). I peeked in mine before instalation, and no such cone. What gives?
The shop test fitted a bigger diameter resonator...I think it was the 6" (or the 5"??) and no go.
09-04-2009, 03:00 PM
#45
That part will not fit...the body is too big (6"). You need either part #10426 (18") or part #10426 (22"). I have a complete ATLP setup (J-Pipe, race-pipe, and the quads), and like others have mentioned, the drone was crazy. 
I lived it for 3 weeks....it did get better, but the drone was still noticeable between 2K-3K under normal acceleration. After consulting with STILLHERE153(<-knows his stuff), I went with a Magnaflow #10436 resonator. Now the cabin drone is COMPLETELY GONE!! The exhaust note at the outside is still the same sexy ATLP sound, and you can hear it from the inside but not that intrusive drone.
I lived it for 3 weeks....it did get better, but the drone was still noticeable between 2K-3K under normal acceleration. After consulting with STILLHERE153(<-knows his stuff), I went with a Magnaflow #10436 resonator. Now the cabin drone is COMPLETELY GONE!! The exhaust note at the outside is still the same sexy ATLP sound, and you can hear it from the inside but not that intrusive drone.yes, behind the race pipe. everything after the race pipe is basically a straight pipe, so the installer just have to cut out whatever is needed. part #10436 is a 22" resonator; the complete length with ends is 28".
here is the link: http://www.magnaflow.com/02product/s...e=main&id=7955
here is the link: http://www.magnaflow.com/02product/s...e=main&id=7955
Let's talk exhaust surgery. I got under the car this afternoon, and took some measurements. I'm going to assume that the bends in the ATLP exhaust are a bit different that the XLR8, but i have a 19" section that runs from the front flange (by the cat) to the first bend. Then, from the bend, I have EXACTLY 28" to the joint with the next peice (this section contains the tiny res).
It sounds like common sence that the largest muffler I can fit would provide the best noise suppression.
- Is it too tight to slip the #10436 28" in there with the bend being where it is or should I go with the next smaller size (#10435 24" overall)?
- If we go with the 28" one, would you recommend that the installer shorten one end of the Mag. muffler pipe so that the XLR8 straight pipe section can make it's unimpeeded bend, and then transition to the Mag. muffler? This way, I would only need one weld and the trailing end of the Mag. muffler can just slip into the clamped end of the next exhaust pipe section.
09-04-2009, 03:46 PM
#46
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Do you think there will be a reduction in gains made from changing the oem exhaust to the XLR8 with the large muffler? If so how much?
09-04-2009, 03:51 PM
#47
Burning Brakes
Gilla, Josh said hell get back to us on the resonated cone, hopefully by sometime next week. If the resonated cones are truly missing, installing that may just solve our drone problem .
09-04-2009, 08:13 PM
#49
c2pid. I probably should just PM you, but there are others that might benefit from this information.
Let's talk exhaust surgery. I got under the car this afternoon, and took some measurements. I'm going to assume that the bends in the ATLP exhaust are a bit different that the XLR8, but i have a 19" section that runs from the front flange (by the cat) to the first bend. Then, from the bend, I have EXACTLY 28" to the joint with the next peice (this section contains the tiny res).
It sounds like common sence that the largest muffler I can fit would provide the best noise suppression.
Let's talk exhaust surgery. I got under the car this afternoon, and took some measurements. I'm going to assume that the bends in the ATLP exhaust are a bit different that the XLR8, but i have a 19" section that runs from the front flange (by the cat) to the first bend. Then, from the bend, I have EXACTLY 28" to the joint with the next peice (this section contains the tiny res).
It sounds like common sence that the largest muffler I can fit would provide the best noise suppression.
- Is it too tight to slip the #10436 28" in there with the bend being where it is or should I go with the next smaller size (#10435 24" overall)?
- If we go with the 28" one, would you recommend that the installer shorten one end of the Mag. muffler pipe so that the XLR8 straight pipe section can make it's unimpeeded bend, and then transition to the Mag. muffler? This way, I would only need one weld and the trailing end of the Mag. muffler can just slip into the clamped end of the next exhaust pipe section.
Have a look at the pictures in this thread as a reference for the ATLP catback system: https://acurazine.com/forums/car-parts-sale-361/3g-atlp-quad-exhaust-last-batch-10-w-j-pipe-test-pipe-lots-pics-741147/
Pictures #1, 8, & 9 shows a few good shots of that "almost straight" mid-pipe. That's the pipe you cut into for the Magnaflow. What exactly is the piping size of the XLR8? If it's 2.5" like the ATLP, Magnaflow #10435 will not fit as it has a 2.25" inlet and outlet. The longest 4" diameter with 2.5" inlet & outlet is the #10436. If space is an issue, you can go for the #10426, or Hushpower II "The Resonator" (part # 12512400).
So far I am EXTREMELY happy with the 10436. It's definitely is not stock quiet, and you will hear your exhaust (that's the purpose of an aftermarket exhaust right?
)...but NOT that crazy drone. I am running a supercharger as well...now I can hear both the whine and that nice growl. 
09-04-2009, 08:24 PM
#51
going back to topic of this thread..the drone. adding a high flow resonator to the system will take a small performance hit..maybe 1 or 2 whp. not sure what others feel about that, but i'll take that anyday over the dreadful drone...but that's only me.
09-04-2009, 09:17 PM
#52
Damn! I had no idea you'd get it going this fast! Now I have no choice but to wait and see how this turns out. I'm thinking that the one end of the Mag. muffler should fit right into the Y-pipe end, so you'll only need one weld done, just behind the bend in the straight pipe.
c2pid - thanks so much for your help. I'm probably going to do the same thing as j1n. I must have looked at the wrong line for the Mag. muffler when I was typing my entry. The #10436 should be the winner, as you suggested.
c2pid - thanks so much for your help. I'm probably going to do the same thing as j1n. I must have looked at the wrong line for the Mag. muffler when I was typing my entry. The #10436 should be the winner, as you suggested.
09-04-2009, 09:21 PM
#53
I'm not super confident that the cone will do the trick. Unfortunately, the cone should most likely have been welded in directly before the resonator, which is now inaccessible at its leading end. I'm not sure if an obstruction in the center of the pipe is really what we want anyway. A larger resonator with some acoustical fiber should be the better choice, IMO what BB should have included in the first place.
09-04-2009, 10:23 PM
#54
Damn! I had no idea you'd get it going this fast! Now I have no choice but to wait and see how this turns out. I'm thinking that the one end of the Mag. muffler should fit right into the Y-pipe end, so you'll only need one weld done, just behind the bend in the straight pipe.
c2pid - thanks so much for your help. I'm probably going to do the same thing as j1n. I must have looked at the wrong line for the Mag. muffler when I was typing my entry. The #10436 should be the winner, as you suggested.
c2pid - thanks so much for your help. I'm probably going to do the same thing as j1n. I must have looked at the wrong line for the Mag. muffler when I was typing my entry. The #10436 should be the winner, as you suggested.
09-06-2009, 04:39 PM
#58
That part will not fit...the body is too big (6"). You need either part #10426 (18") or part #10426 (22"). I have a complete ATLP setup (J-Pipe, race-pipe, and the quads), and like others have mentioned, the drone was crazy. I lived it for 3 weeks....it did get better, but the drone was still noticeable between 2K-3K under normal acceleration. After consulting with STILLHERE153(<-knows his stuff), I went with a Magnaflow #10436 resonator. Now the cabin drone is COMPLETELY GONE!! The exhaust note at the outside is still the same sexy ATLP sound, and you can hear it from the inside but not that intrusive drone.
I lived it for 3 weeks....it did get better, but the drone was still noticeable between 2K-3K under normal acceleration. After consulting with STILLHERE153(<-knows his stuff), I went with a Magnaflow #10436 resonator. Now the cabin drone is COMPLETELY GONE!! The exhaust note at the outside is still the same sexy ATLP sound, and you can hear it from the inside but not that intrusive drone.I swapped the Magnaflow out for a Hushpower HP-2 muffler. The Hushpower muffler did minimize the drone, but still didn't completely eliminate. The exhaust note sounds really nice now. The only drone I hear now ( very minimal ), is only under certain RPM and engine load conditions.
09-06-2009, 08:15 PM
#59
Anyone have any experience with the Vibrant Ultra-quiet resonator? That was the first product Josh from Excelerateperformance recommended to cut the drone. I'm not sure if there would be any fitment issues, but we know the Magnaflow 4" round fits.
j1n - Sucks that you couldn't get that welded up. Good luck this week.
j1n - Sucks that you couldn't get that welded up. Good luck this week.
09-07-2009, 09:55 AM
#61
I don't know if this helps, but my set up is pretty quite above 45-50 mph cruising speed. I wish I didn't mess with the Magnaflow in the fist place. Seems like adding a high flow mid muffler is a better route than adding a true resonator. I guess the Magnaflow is more like a muffler or glass pack, since it does have packing material.
From a few threads I've read through, and clips, I think the ATLP drones less, or is more quite than the XLR8 equivalent. I'm sure it depends on the exact set-up, and model TL though.
From a few threads I've read through, and clips, I think the ATLP drones less, or is more quite than the XLR8 equivalent. I'm sure it depends on the exact set-up, and model TL though.
09-07-2009, 10:32 AM
#62
I tried that same Magnaflow resonator out, except in a smaller 18" body length, 24" OAL. It didn't do much at all to reduce the drone for my set-up, I could barely tell any difference. I have the ATLP quads w/ race pipe on a base 6 speed, so I don't have the J-pipe. I'm kinda skeptical it actually eliminated the drone, based on my experience with it.
I swapped the Magnaflow out for a Hushpower HP-2 muffler. The Hushpower muffler did minimize the drone, but still didn't completely eliminate. The exhaust note sounds really nice now. The only drone I hear now ( very minimal ), is only under certain RPM and engine load conditions.
I swapped the Magnaflow out for a Hushpower HP-2 muffler. The Hushpower muffler did minimize the drone, but still didn't completely eliminate. The exhaust note sounds really nice now. The only drone I hear now ( very minimal ), is only under certain RPM and engine load conditions.
i did try to make a before vid of inside the cabin yesterday but the camera sucks with audio so the vid is crap.
looks like the shop is closed today. sucks cause i have off from work today and will probably have to wait till saturday to get it on now.
09-09-2009, 06:33 PM
#65
So far I am EXTREMELY happy with the 10436. It's definitely is not stock quiet, and you will hear your exhaust (that's the purpose of an aftermarket exhaust right?
)...but NOT that crazy drone. I am running a supercharger as well...now I can hear both the whine and that nice growl. is the 10436 2.5" O.D. or I.D. at the ends? thanks.
09-10-2009, 03:02 AM
#70
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fyi to everyone... Michael Vast... from Vast Performance has the best price on all magnaflow products... amazon is overpriced...
http://stores.shop.ebay.com/vastperf...34Q2ec0Q2em322
I just got a magnaflow 2.5" muffler and resonator for under a buck
http://stores.shop.ebay.com/vastperf...34Q2ec0Q2em322
I just got a magnaflow 2.5" muffler and resonator for under a buck
09-10-2009, 07:27 AM
#71
Burning Brakes
09-10-2009, 02:42 PM
#72
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hey mike... can't reply on aim but looks like he doesn't have them listed cuz I bought em.... send em a pm on ebay
here's the resonator I bought
http://cgi.ebay.com/ebaymotors/ws/eB...m=320417120907
here's the resonator I bought
http://cgi.ebay.com/ebaymotors/ws/eB...m=320417120907
09-10-2009, 03:14 PM
#73
hey mike... can't reply on aim but looks like he doesn't have them listed cuz I bought em.... send em a pm on ebay
here's the resonator I bought
http://cgi.ebay.com/ebaymotors/ws/eB...m=320417120907
here's the resonator I bought
http://cgi.ebay.com/ebaymotors/ws/eB...m=320417120907
09-10-2009, 08:54 PM
#77
I'm thinking the cone isn't what we want anyway. Sounds like it would restrict exhaust flow... Good luck j1n. It was good to see your pictures b/c I had never seen the OEM resonator. Mine came with a hacked off stage 4 exhaust. Based on that, I'm thinking this magnaflow muffler is gonna work. How do they compare on the inside? Perforated metal pipe with packing?
BTW: Are you neglecting your OEM Type-S wheels?
BTW: Are you neglecting your OEM Type-S wheels?
09-10-2009, 11:34 PM
#79
Burning Brakes
Guys, i got my resonator cone. Its not overwhelming huge ( 2.5" long with a weld area OD of 2-5/16"). Im going to get it tack welded in on satruday. Its not mesh or some cheap stuff like that. I will post pics once i can.
