Ideal resonator placement to remove drone on muffler deletes?

[blkwrxwag]

I had the Mach V dual outlet delete - the drone was awful. I did what ATL_BRZ did with a resonator in between the pipes.

I can't explain why it works, but the drone is gone. I think it is the cross over tube that causes the drone, because single exit track pipes do not have this issue.

[CaptainSlow]

I think I'll try the resonator first, since I already bought that. If it doesn't work, I might sell it and go back to stock until I can afford the Greddy system. Thanks for all the replies...I'll keep up a little hope that the resonator works.

[blkwrxwag]

Good plan - I think you will be happy with the results.

[bcmakesiteasy]

see post #94 @blkwrxwag had a resonator welded to his berk muffler delete, im going to do the same thing

http://www.ft86club.com/forums/showt...al+exit&page=5

[CaptainSlow]

Originally Posted by bcmakesiteasy

see post #94 @blkwrxwag had a resonator welded to his berk muffler delete, im going to do the same thing

http://www.ft86club.com/forums/showt...al+exit&page=5

Perfect. I'm hoping for similar results, for sure! Gave me some hope :happy0180:

[CaptainSlow]

Well I had the resonator installed today. There is still drone (unfortunately) but overall I think there is less and for shorter ranges in the RPM range. Going to stick with this setup until I'm able to replace the stock cat back completely

[CaptainSlow]

So after a little more experience with this new setup, I feel pretty confident saying the following:

1) Drone in the "normal" driving ranges is definitely reduced, if not altogether eliminated from some areas. This means normal driving around town is much quieter...the drone around 1800-2200 RPM is greatly reduced, as is drone under normal acceleration. Drone on deceleration while in gear is slightly reduced as well

2) Drone in the upper ranges (freeway speed) has increased. There was little to no drone around 80mph before, but now there is a noticeable amount. Not deafening, but definitely increased over where it was before

3) The resonant drone that was right around 1800-2200 RPM seems to have shifted up to around 3200-3500 rpm, which is probably why it's now noisier while cruising at 80mph.

Overall, it was a nice improvement, since 90% of my driving is around town at speeds under 55mph, and a lot of short acceleration (like from stop signs, turns, stop lights, etc). The drone has been significantly scaled back in those conditions, but it IS still present. Just more manageable/livable.

So, in the end, if you're concerned with noise I'd suggest just going with a regular cat-back or changing the tips on your stock muffler. The resonator doesn't fix the issue, but it does make it a bit easier to live with.

If I had to rate the "every day use by a normal person" desirability on both setups, I'd say the regular Berk muffler delete was around a 4/10. With the resonator it's probably around a 6/10. Not a huge improvement, but noticeable.

[djliquidsteele]

How long did you give the muffler delete before deciding it was too loud? Mine quieted down after several hundred miles. I think many people who get these throw it on, start it up and decide its too loud. You have to give it time to get well coated. I'm 2.5" header back, no cat and muffler delete and I think it sounds fine.

[CaptainSlow]

I'm hoping that happens over time as well. I did not wait long - only a week. I just wanted to do what I could because I have a road trip coming up this weekend, and I didn't want the noise to scramble my brains