cherrybomb as a resonator - does it work?

[steveo27]

well long story short. i got pulled over for my car being too loud, and i got a "fix-it" ticket, i have a week to fix it or get a ticket

right now, my car has a hi flow cat, 2.5" piping, a magnaflow muffler, all exiting as a side dump. i have a cherry bomb sitting my garage and i am planning on throwing it on before the muffler since it is 'glass packed, it should adsorb some of the sound waves shouldnt it?

now the question is how many of you have actually used a cherry bomb as a resonator to quiet your exhaust system down? i was also thinking of stepping the piping down to 2.25" too

i dont feel like redoing the exhaust completely, im just lookin for a quick, easy fix

P4V

Modified by steveo27 at 12:17 AM 2-26-2009


Modified by steveo27 at 12:22 AM 2-26-2009

[VegasJetta]

Don't step it down, leave it 2.5 and just put a resonator in the middle somewhere. Give the cherry bomb to a neighbor with a mullet and a camaro...

[steveo27]

what you suggest as a resonator? it needs to fit in the "hump" in the floor pan.

i wanna ditch the side dump, but i just dont feel like doing it yet.

i just wanna take the lazy way out


Modified by steveo27 at 12:21 AM 2-26-2009

[Jphive]

the cherry bomb should quite it some but is it enough you should ask an exhaust tech.

[TRot 16v]

my suggestion: http://store.summitracing.com/...w=sku

should bring down the dB's and have a good sound.

[skidplate]

Yeah you can use one as a resonator.

[Will.i.am]

The Cherry bomb will definetly change the tone or note that the exhaust produces but will still be almost as loud. Two different things here, loud can be quiet when the note changes. I have had many runins here with noisy exhaust at our shop and a good resonator works well, I believe the Cherry is directional too, so don't mount it backwards or it wont work

[secondgen]

Can you, yes. Do they work very well? In my experience, no.

[Seax_Smith]

Quote, originally posted by TRot 16v »

my suggestion: http://store.summitracing.com/...w=sku should bring down the dB's and have a good sound.

Those seem pretty cool..... Stole that link even though I don't need any exhaust stuff, have what I think is best for the car already.... wish they made those spirals in 1 7/8 so I could get them on my 77 Yamaha.

[chrislane31]

I used to have 2 cherry bombs running off of each header on a 360 v8 jeep and it was side exh on both sides and it set off car alarms everywhere. Not very quiet.

[Mr. Knappy]

Fix it ticket in PA? That's a new one. Did they actually show you the db reading? If not, tell them to go **** themselves.

[VegasJetta]

Quote, originally posted by Jphive »

the cherry bomb should quite it some but is it enough you should ask an exhaust tech.

Your run-on sentence meter is broken.

[G60 Carat]

LOL funny responses abound.

But yes a Cherry Bomb works just fine as a resonator, and I wouldn't worry too much about bottle necking it down to "only" 2.25". A 2.25" I.D. glass pack muffler can flow something like 300hp before you will see any loss at all. a 2.5" I.D. one is about 500hp before it becomes a source of restriction.

[weefek]

Quote, originally posted by TRot 16v »

my suggestion: http://store.summitracing.com/...w=sku should bring down the dB's and have a good sound.

We used sidepipes with a similar internal baffle design on our 66' AC cobra w/ 427 side oiler FE engine, the sound wasn't as deep afterwards but the car had a very noticeable power increase (already had about 550bhp).

[Rassig]

Quote, originally posted by VegasJetta »

Don't step it down, leave it 2.5

Why not step it down? Unless he's running a turbo, all the 2.5 is doing is:
1) Making more noise
2) Probably Losing HP/torque.

Quote, originally posted by VegasJetta »

just put a resonator in the middle somewhere.

Uh... a Cherry Bomb is a resonator if it's spliced in upstream of the rear muff.

Quote, originally posted by VegasJetta »

Give the cherry bomb to a neighbor with a mullet and a camaro...

Relax... you're starting to sound like some east coast uptight dude
rather than the mellow guy from Vegas that we've all learned to love!

I used a Cherry Bomb as a rear muff on my Autotech cat back when the
SuperTurbo crapped out. (Yes, I did paint it black )
It certainly wasn't as quiet than the SuperTurbo, but not by a huge margin.

I say just splice in the Cheery Bomb.
The louvered design will provide more sound reduction than a perforated core glass pack.

[steveo27]

Quote, originally posted by Mr. Knappy »

Fix it ticket in PA? That's a new one. Did they actually show you the db reading? If not, tell them to go **** themselves.

no, they didnt db meter it or physically look under the car to see if there was a muffler. so technically they have no grounds to give me a ticket... so..

i have the page of the vehicle code book showing all the info i need to fight this if need be. if i cant get it any quieter im just gonna fight it. it has a cat, it has a muffler, and the exhaust tip exits past the edge of the body. thats all the exhaust need to be legal. plus he didnt us a db meter and has no proof of how loud it is

but i want to quiet the car down anyways for myself. its too loud for me. so all of you guys who say it doesnt work, have you actually added one to your exhaust and not noticed a difference? i dont care if you think it wont make a difference. i want some concrete answers


Modified by steveo27 at 11:54 AM 2-26-2009

[Clownracer v2]

Quote, originally posted by Mr. Knappy »

Fix it ticket in PA? That's a new one. Did they actually show you the db reading? If not, tell them to go **** themselves.

got one for my side exit to

[steveo27]

nothing like the end of the month trying to make quota tickets


Modified by steveo27 at 12:15 PM 2-26-2009

[G60 Carat]

ok I'll give you concrete.

I had a full 2.25" system on my '85 Golf. Not cat, no resonator, and a straight through glasspack on the back. It was as loud as hell, but deep toned, I liked it.

Then a cop gave me a ticket for it being too loud/broken. I said look, right there, you can see the muffler, it's all new, there are no holes. It's not broken. I had the receipts in the glove box. He said the law here it was officers discretion on noise levels. No DB meters needed!

So I went back to where I had it done, and they put in a 18" cherry bomb under the car as a resonator. It took a noticeable amount of DB out of the system, and changed the tone a bit. Also it makes a faint "ping, ping, ping" noise under the car at idle, I believe your hearing every cylinder fire. My Current Jetta with a resonator does this too. But I've even heard muscle cars that do this.

So anyways, I took my car down to the Police Station and my receipt, and I said I need somebody to check my car. And the officer working the desk looked at the bill, saw the date on the work done was after the ticket date, it had my car's license plate on the receipt, and he never even bothered to go outside to hear it. The just deleted the ticket out of the system and said "have a nice day"

But yeah it took a noticeble amount of DB out of the system. But I wouldn't call it quiet. It's still fairly loud.

The thing that pisses me off most is my Sportbikes are way louder, and I've never been harassed about the exhaust on them. But I have been given tickets for illegal signal lights, and plate in unreadable location... Meh what are your gonna do, every cop has their own personal pet peeves.

[steveo27]

thats what i needed to hear, thanks

looks like im gonna slap it on this weekend

[Austin_85'MKII]

Quote, originally posted by VegasJetta »

Your run-on sentence meter is broken.

haha

[Canadian_dubber_4_life]

Quote, originally posted by steveo27 »

nothing like the end of the month trying to make quota tickets Modified by steveo27 at 12:15 PM 2-26-2009

ya that's lame.

at least it's not a j-walking ticket

[Moofluffen]

I wouldn't recommend a Cherry Bomb... they make MkIIs sound worse.

[G60 Carat]

How is it any different then any other glasspack style muffler. Depends more on the rest of the system really.

[Live Fast]

Steve, I'm running a Magnaflow resonator on my side exit on my coupe, it's got a 4" diameter and less than 20" long, I paid like $55 for it. I have just the header to the Magnaflow resonator to the side pipe, nothing else and it's not TOO loud, I would think if you added that into your line up then you should be good to go. It's 2.5" in&out.

Otherwise, if you want to spend a little more I would suggest a Supersprint silencer, it's about the same size resonator as the Magnaflow just a lot more expensive, but it's main purpose is to quite down your exhaust... I think it's about 27" long which is probably too long to add to your system though..

[steveo27]

hmm. one of these?

http://store.summitracing.com/...w=sku

my set up is a dual outlet manifold and DP, catco hi flow cat, & one of those those magnaflow 4" round mufflers. its not terribly loud, but after almost 2 years of it, its not the quietest.

well see what the glass pack will do.

[ModernDayThorns]

My friend has only a cherrybomb on his MkI. It sounds good. It'll quiet it down, and give you a nice deep tone.
Do it!!

[dtotherob]

i'm rocking a thrush glass pack. basically a cherry bomb. i don't have any "concrete" because i installed the whole system at once. it's loud when you are on it, but very manageable when not. i've never been pulled over.

also it's a g60 with header, glass pack, and a supersprint mk1 muffler. all 2.5"

[gillano]

just get some reducing pieces and stick them in the tail pipe "backwards" so the tail pipe looks the same but the pipe inside is actually smaller diameter...iv seen track cars use a similar "silencer" when they were off the track,

you really don't have to fix it just make it quiet enough for the reinspection

i have also heard a story of an RX-3 that had exhuast on the roof, this was a rally car in th 70's btw, for tech inspection they would pack fiberglass inulation in there and it would be quiet enough to be 'legal' but after a few stages it would blow all the fiberglass out and get loud again...if you ever heard a rotary that is totally ported you would know that you car is nowhere near loud

[steveo27]

keep the info comin

[Will.i.am]

Quote, originally posted by steveo27 »

hmm. one of these? http://store.summitracing.com/...w=sku

These are good but I dont like that the endcaps are square to the rest of the body, they dont slide over speed bumps very well on the lowish ones

[boostlust]

im interested, anyone running one of these here?

Quote, originally posted by TRot 16v »

my suggestion: http://store.summitracing.com/...w=sku should bring down the dB's and have a good sound.

[steveo27]

Quote, originally posted by Willy Wonka »

These are good but I dont like that the endcaps are square to the rest of the body, they dont slide over speed bumps very well on the lowish ones

ive never had a problem with mine, its tucks up far enough. it sits about even with the flopr

[steveo27]

the cherrybomb (glasspack) DOES work as a resonator. its made a world of difference.... ill have to get a sound clip of it here soon.

also i noticed my cat is shot, its gutted itself over the past year or so, i guess thats next on the fix list

[TRot 16v]

fix it with a crow bar down it or a sawzall on the front of it and the rear. replace with chosen resonator/silencer/muffler.