No, I think most Muffler Guys would call the 20-pound 'ball' that was removed a muffler. I'm with you on what is called a resonator. If there was room, you could put a resonator front or back. I'm no muffler designer, but I believe a resonator has the function of absorbing some of the sound that results from the resonance frequency of the exhaust system [just like the sound you get when you blow across the top of a bottle]. Longer exhaust systems have a lower resonant frequency and shorter systems have a higher resonant frequency. BTW, my stock exhaust had a bothersome resonance at around 2200 RPMs, which disappeared [luck?] with the One-Ball mod...

-B

 

The removed item is a resonator, it just isn't straight. This is what the guts look like:





It's basically a glass-pack (perforated straight-through pipe surrounded by fiberglas batting) that is bent into a strange shape.

 

Guys,

Im here not to ask for any video clip or how's the one ball has been done.. I've done this mode.

I'm wondering if any of you with this mod is having a vibration at the rear bumper. Every time i start the car (cold or warm), there'll be a vibration. Not just that, but the vibrations continues at every low Rpm, not more than 2K.

I've asked my brother to tap the throttle a lil bit while I check the exhaust. There was no rubbing(tip and valance), exhaust and pipes with the body. Does it mean the frequency of the exhaust causes the rear bumper to vibrate? Coz it vibrates only at certain RPM. Please help... I cant stand it.

 

When I ran the 1-ball, I did not have any vibration. When you have your brother tap the throttle and you are looking at the exhaust - anything in particular move? Did you check the rubber muffler mounts? Are they in place (i.e. hanging properly or naturally)?

Easiest thing to do would be to loosen up the exhaust system - review muffler is hanging right, straight pipe isn't angled up or down and then clamp it back up.

 

Bahamabart,

You are everywhere dude........ I went to the exhaust shop before and they took out the exhaust the fit it back, but still... the vibration is there. So i suspect the frequency caused the bumper to vibrate.

 

but only when I I goose the throttle, or pull hard from a stop. But it existed before the one-ball.

I've done nothing about it, because it doesn't last that long....

Matt

 

Andy 1st. Thanks for the look in side of the Primary Muffler/Resonator! I have been wondering what was inside of the stock mufflers? Have you by chance taken apart the Secondary muffler yet? I would like to see the layout of Secondary muffler. And one other thing, could you or someone else tell me where the stock exhaust pipe tubing goes from 2 1/4 to 2 1/2. (Our MCS is still on the Boat. ) This is what I think it does?
I have a family friend that owns a Muffler shop. After I told him we had ordered a MCS he said he had an idea for a system on MCS. And he wanted to try it out on our car. Thanks for your time & info.
Sincerely,
Randy & Meg

 

comes out at 2.5. I think....

Matt

 

What idea Minimeg06?

 

It's not my idea, it's my/dad friend at the muffler shop in the Phoenix area. I don't make/weld exhaust systems for a living? All he said to me "90% of aftermarket systems don't fit for s**t, there way over price even at my f-ing cost & I will need to buy some SS tubing." My dad has done alot of autobody work for this man. Last time he did a system for me he did Flowmaster and charge me a $40 and a cold case. (He wire welds with his eyes closed. I asked him how he does that he said by sound. And they are sweet welds too!)

 

Matt is right. I replaced the 2.25 from the cat on back with 2.5. It sounds a little deeper than 2/25.

 

The exhaust tubing is 2-1/2" for the short run BETWEEN the mufflers [I'd call them resonators if the exhaust didn't make a 180-degree change of direction]. The tubing is 2-1/4" from the cat back to the first muffler.
-B

 

If the exhaust is tight and not touching anywhere, then it might be easier to find out what is vibrating [bumper area?] and fix the problem there. One place you might want to check -- I've had two cars that had vibrating license plates. Couple of small ruber donuts under the plate fixed the problem.
-B
PS -- The resonance problem that I had with the stock exhaust, at around 2200 RPMs, went away with the one-ball mod.

 

Muy mini,

It's not the plate, the vibration comes from the bumper. Since I'm having the one-ball so to be exact, the vibration is somewhere on the left side of the rear bumper. Perhaps it's the bushing that causes the vibration?

 

they're easy to bend, and that can cause some issues. Also where they overlap, the two parts can bang and clang. The good thing is they're easy to bend back!

Matt

 

i went one step further and replaced the original muffler with a magnaflow, and got rid of the resonator. first i was kinda worried about losing lowend, but oppose to my thoughts car is much more alive now, and the only draw back is the popping, which i sincerely welcome. It is very loud, yet not disturbing. I intentionly took my wife for a ride, even she likes it. Cost me total of $200.00 for the labor, the muffler (magnaflow), the muffler tip (magnaflow again, i will take some pics) and a 2 1/4 pipe for customization, works for me, instead of spending $700.00-$800.00. I can hear the free flow, especially when i am stepping on it

 

one question now, can we spice our custom exhausts with header?

 

ScuderiaMINI,

Interesting, I hope you can post the pics and if possible, a sound clip? Since my stock muffler causes some prob, I might have to replace it... so, this might be an option but I hope my current prob can be solved. TQ.


My going under the car and have someone to tap the throttle for me, hopefuly i can solve the prob. Wish me luck!!!

 

I've been thinking about the one-ball mod... There's one online vendor that sells the connecting pipe for like $125 (not Myminiparts, i can't remember the name), and they state the entire process can be DIY, only hand tools required. Can this be done without welding? I have decent tools, but not welding expertise/equipment.

If I removed the resonator, cut the pipes, and band clamped a connection in, would that be really "ghetto?"

Ken

 

Had mine done at a local shop. $90 for the whole deal, welded. They cut up other exhausts lying around to get the bends needed.

Matt

 

so i just called up a midas and asked them if they would be able to help me to do the one ball and they said they were not allowed to change the muffler because it was against the law? i was a little surprised, is this going to be an issue at all the places im gonna call up?

 

Stay away from any Midas shop.

 

Dr Obnxs and I both used the same Meineke shop. Stay away from Midas.

 

The meineke shop mentioned is owned and operated by Lupe Garcia, a long time member of the Nor-Cal Shelby Club. He does all sorts of cars there. Last time I was in, an early Tiger (small English roadster with 260/289 Ford V-8 power, the poor mans cobra) was in for a new exhaust. He does lots of performance cars too. The Midas shop was sticking to actually correct federal emissions law. The exhaust system is part of the emissions system on cars, and can't be changed unless it is approved... Think CARB exemption...

Matt

 

Find a local muffler shop that works on performance cars. It's not going to be a chain like Midas, etc. A local muffler shop could use the money and they will be a lot more sympathetic to your needs. I had the work done for 80-something dollars and that included changing out the run from the cat back to the muffler from 2-1/4" to 2-1/2". They even ordered me a mandrel bent [not crimped] elbow for where the second muffler is removed. Have them pre-order you the elbow, if it's not in stock, make an appointment and you'll be out the door in about an hour. Or you can DIY and pay more...
-B