Building a double Cherry Bomb muffler for Elan S2

[loueelotus]

Hi, I will be building with some friends a double Cherry Bomb muffler for my Elan S2 this winter to config into the muffler pocket of the Elan S2. What I am curious about is the sound that comes from this system. A single muffler is very loud 85 db It will sound lower but how much and will a double system sound nice? Please give me your take on that.. We have checked and it will fit nicely and powder coat it black. Here is a rough drawing with cuts still to be made to fit..

Regards,
Lou

[Fred Talmadge]

https://cherrybomb.com/
Disturbing the peace since 1968
I'd ask their tech support.

[loueelotus]

I asked them they have no idea. i also asked Summit and the same answer.. So I will experiment and see what happens..
Thanks,
Lou

[benymazz]

I guess I'l jump in here. I have no idea how it would sound but I would love to hear the results. My current muffler is a glasspack (same design as cherry bomb) but the bore is 1 5/8 to suit the stock exhaust pipe. I measured the length of the body (excluding pipes) as about 16 inches IIRC. I am replacing with a 1 3/4 bore glasspack that has a body length of 12 inches. My goal is to deepen out the sound a little bit - the 1 5/8 one was quite nice, very soft and gentle at idle but noticeable once you got on the throttle, but I believe that a bigger bore and slightly less length will hopefully let 'er roar a little more at WOT as well as helping me hear the engine at idle . Louder is inevitable, yes, but that is not my primary goal.

If louder was my goal I would get something with a V8 - I'm pretty sure even with no muffler my Elan would still be quieter than half the Mustangs here in Daytona!

-Ben

[loueelotus]

Thank you Ben.. I thought It would be as you think. I will do it as a winter project and see and hear how it works out..
If I can remember I will send you the sound and give you my thoughts on it..

I am also rebuilding the Webers when she goes to sleep haha, so busy winter which is long in Canada anyways..

Best Regards,
Lou

[h20hamelan]

I might consider a resonator, then muffler.
I am not sure how many believe in free flowing catalytic converter, but we all should have them. Even the fuel injected folk.
A muffler muffles everything, a resonator eliminates drone at certain RPM?s. Most are for cruising 2000rpm. Each one is different.

[benymazz]

I might consider a resonator, then muffler.
I am not sure how many believe in free flowing catalytic converter, but we all should have them. Even the fuel injected folk.
A muffler muffles everything, a resonator eliminates drone at certain RPM?s. Most are for cruising 2000rpm. Each one is different.

This. I forgot about this. My understanding parallels yours - resonators are very useful for making a sound more easy on the ears for long distance driving without changing it too much.

My concern about adding a resonator to an Elan is the same as adding a cat - with the already-sparse ground clearance there just isn't room for it. Perhaps you could tuck a resonator into the stock muffler cutout but that would be tight I think since you still need to put the muffler somewhere. Also with a cat I would be very concerned about the heat and how you would make a heat shield for it.

The cat would also get rid of what my friend semi-affectionately calls "the lawnmower smell", a mixture of unburnt hydrocarbons and burning oil that I find to be a key part of my Elan's personality

[loueelotus]

Just before installation

Hi, Twin Cherry bombs are in the Lotus for several months NOW and it sounds just like a monster and when in a top gear it is fairly quiet..

Love it..and it worked out

Lou

[h20hamelan]

2 mufflers, would act similar to a resonator and a muffler.
best it is mild steel