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Tech Area => General Buick Tech => Topic started by: Shimy87 on September 24 2018, 09:47:54 AM

Title: Exhaust ideas
Post by: Shimy87 on September 24 2018, 09:47:54 AM
Hey guys...i have a Pypes 2.5 system on the car now with a 3 inch DP.....Works great but the drone is just getting too annoying. I put some Magnaflos mufflers on a camero that had terrible drone and took care of 90% of it.  What works well on these to flow but not drone? Thanks
Title: Re: Exhaust ideas
Post by: Steve Wood on September 24 2018, 10:24:07 AM
Dynomax Ultra Flos, Hooker Max Flows, or Magnaflows are all similar from my experience
Title: Re: Exhaust ideas
Post by: daveismissing on September 24 2018, 11:04:00 AM
There are some threads on 3 muffler setups that kill it completely. I believe Bob Bailey has his car set up that way.
Title: Re: Exhaust ideas
Post by: Forzfed on September 24 2018, 11:20:37 AM
The 3 muffler is to make the exhaust really quiet.  I was thinking of getting the GN1 exhaust and adding a magnaflow for the third muffler.
Title: Re: Exhaust ideas
Post by: Shimy87 on September 24 2018, 01:34:04 PM
I thought about this 3rd muffler idea.....placi ng it where the converter was....will this kill the spool up or hold back boost on top?
Title: Re: Exhaust ideas
Post by: Steve Wood on September 24 2018, 02:05:12 PM
I have Ultra flos on one car and the Hooker Max Flows on the other.  Neither drone.

The third muffler will make it quieter.  It will add a little restriction.  I doubt it is a major eater of HP...at least if your car is making less than 500 hp
Title: Re: Exhaust ideas
Post by: john robertson on September 25 2018, 04:58:05 PM
I have a 2.5" Hooker cat-back system on my GN. It came with Hooker Aero Chamber mufflers. They absolutely DO NOT DRONE, and sound great. They have many, many, thousands of miles on them too, and no drone.
Title: Re: Exhaust ideas
Post by: Forzfed on September 25 2018, 06:37:29 PM
I have a 2.5" Hooker cat-back system on my GN. It came with Hooker Aero Chamber mufflers. They absolutely DO NOT DRONE, and sound great. They have many, many, thousands of miles on them too, and no drone.
I have the same system but with my 6468 and a .85 A/R it drones!  No drone on my TE44 or TE62 or CPT66.
Title: Re: Exhaust ideas
Post by: Shimy87 on September 25 2018, 06:40:33 PM
Every combo is different for sure...mine was great and then I went from a stock down pipe to a 3 inch and it drones really bad now
Title: Re: Exhaust ideas
Post by: john robertson on September 25 2018, 07:14:03 PM
I have a 2.5" Hooker cat-back system on my GN. It came with Hooker Aero Chamber mufflers. They absolutely DO NOT DRONE, and sound great. They have many, many, thousands of miles on them too, and no drone.
I have the same system but with my 6468 and a .85 A/R it drones!  No drone on my TE44 or TE62 or CPT66.

The Hooker catback system has come with different mufflers over the years. Just to be clear, and I understand you stated you have the same system, but did your system come with the aerochamber mufflers? Just for more info on my car, I'm running a 6262 Precision turbo, Champion ported irons with match ported intake, 212/212 cam w/roller rockers, and a .030 over motor. And ........ no drone.  :D
Title: Re: Exhaust ideas
Post by: Scoobum on September 25 2018, 07:25:40 PM
No drone at 123 mph with my dual ATR setup...just sounds like the worlds coming to an end with all the air leaks around the door windows and T-tops.
Title: Re: Exhaust ideas
Post by: Steve Wood on September 25 2018, 10:01:36 PM
the Aero's have always had a reputation for being quiet.  I think if you search for some flow tests, they are more restrictive than the MAX Flows or other straight thrus
Title: Re: Exhaust ideas
Post by: Top Speed on September 25 2018, 10:26:29 PM
I just put on some 3" Borla S-Types that have no drone but yet sound incredible when you get on it.  They are straight through design which is recommended for our cars.
Title: Re: Exhaust ideas
Post by: phil_long on September 26 2018, 09:14:29 AM
I'd love to hear the borlas!!!!!
Title: Re: Exhaust ideas
Post by: Steve Wood on September 26 2018, 09:49:54 AM
Road Trip!
Title: Re: Exhaust ideas
Post by: Top Speed on September 26 2018, 11:57:37 AM
LOL, they do sound good.  On a Turbo 6 at WOT it is a sound that has to be heard to be appreciated.
Title: Re: Exhaust ideas
Post by: Forzfed on September 26 2018, 12:58:52 PM

The Hooker catback system has come with different mufflers over the years. Just to be clear, and I understand you stated you have the same system, but did your system come with the aerochamber mufflers? Just for more info on my car, I'm running a 6262 Precision turbo, Champion ported irons with match ported intake, 212/212 cam w/roller rockers, and a .030 over motor. And ........ no drone.  :D
Yes it came with the same mufflers!  But I have a 224/224 cam with ported Champions and 4.1.  Like I said it was the big A/R on the exhaust that did that. It never did it before and it sounds good WOT!
Title: Re: Exhaust ideas
Post by: Steve Wood on September 26 2018, 04:21:32 PM
https://www.youtube.com/watch?v=CF3RfyD-DzE (https://www.youtube.com/watch?v=CF3RfyD-DzE)
Title: Re: Exhaust ideas
Post by: phil_long on September 26 2018, 05:15:27 PM
that video  :rofl:
Title: Re: Exhaust ideas
Post by: Forzfed on September 26 2018, 06:38:09 PM
No restriction there!  But does it drone? :icon_lol:
Title: Re: Exhaust ideas
Post by: TexasT on September 26 2018, 10:05:31 PM
How many day long trips are you people taking that some drone is a problem?
Title: Re: Exhaust ideas
Post by: Steve Wood on September 26 2018, 10:23:56 PM
Drone is really annoying in minutes...
Title: Re: Exhaust ideas
Post by: Shimy87 on September 26 2018, 10:29:02 PM
Yes it is!!
Title: Re: Exhaust ideas
Post by: earlbrown on September 27 2018, 12:19:30 AM
How many day long trips are you people taking that some drone is a problem?


I daily drove my GN with a 'droning' 3" ATR single shot over 600miles a week, every single week right up until it was stolen.    It was amazing how much more ass the exhaust note had when the 250,000 mile stock engine got replaced with a high compression, big cam, roller 4.2L.

  I'll take the sound of the drone at cruise over the horrible sound of a Buick V6 at full honk any day of the week.
Title: Re: Exhaust ideas
Post by: phil_long on September 27 2018, 08:47:20 AM
i really enjoy the drone personally!!!
Title: Re: Exhaust ideas
Post by: Steve Wood on September 27 2018, 09:17:17 AM
If you love the drone, buy a pair of the turbo mufflers that were popular for at least five minutes on Regals in the early days!  :D
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