I am running the SLP cat-back exhaust, and I'm getting very annoyed with the cabin drone between 1800-2500 RPM. What's the difference between a glasspack and a resonator, and which one is more effective at eliminating cabin drone? Thanks guys.
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06-18-2010
I am running the SLP cat-back exhaust, and I'm getting very annoyed with the cabin drone between 1800-2500 RPM. What's the difference between a glasspack and a resonator, and which one is more effective at eliminating cabin drone? Thanks guys.
06-18-2010
I had the same problem with my GMPP system, and that was with the resonator and cat installed. I personally think it's the mufflers not doing thier job, or improper muffler design. The stock units (mufflers) are much larger in diameter, or, properly sized to reduce the drone. I loved the sound of the GMPP system, it was just that darn drone at 1800-2300 that drove me crazy, I endded up reinstalling the factory system with the exception of thier resonator (left it in place) and the drone is now non-existant, so I'm thinking it's all in the mufferls.
Dean
06-18-2010
both will eliminate drone, however, they are different in their application.
glasspack: does its job to 'smooth' out the exhaust note, but doesn't really provide any sound dampening.
resonator: used to make the exhaust quiet and helps keep it from being raspy.
06-18-2010
Well, when you want flow you get noise. It's unfortunate but true. I vote going for a resonator.
06-18-2010
Not really...my car flows great and its quiet until WOT.
I have Catless Pacesetters, 3" Custom piping from the catback flange back with Flowmaster 40's and a stock GM Resonator. No drone or rasp here.
06-18-2010
I don't think the OP's exhaust has no resonator. Having the stock resonator in place definitely helps. You did it the way that I would've. What piping did you use?Originally Posted by bluegtp91
06-18-2010
Thank you, Bio. Which one would YOU choose? And what's a good brand to buy?
06-18-2010
i bought a glasspack to put on my car for 19.99 from summit (their brand). it was cheap and effective for what i was looking to get out of it.
be weary that resonators last A LOT longer than glasspacks do.
06-20-2010
Custom bent 3" piping.
06-20-2010
I also have the SLP cat-back along with SSAC headers, same as speed daddy, and the drone is annoying. I bought a magnaflow resonator 3in in and out for like 80 bucks. I'm getting it installed monday and i'll let you know how it sounds.
06-20-2010
would it make sense to do a glasspack and a resonator in line? so you get both the benifits?
06-20-2010
I haven't really noticed a drone with my slp setup.
06-20-2010
no, considering that a glasspack is basically a toned down resonator.
06-21-2010
do they make aftermarket resonators that sound different but not raspy?
06-21-2010
Yes! Keep me posted!
06-24-2010
Alright here it is, before.... skip the video to 3:10.....raspier than crap
YouTube - Lightly Modded GTP Walk Around
and after, smooooooth
0623102055-00.mp4 video by suprasrock88 - Photobucket
06-25-2010
Nice! Where did you buy this resonator?
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