Just got a new exhaust

[ollyc98]

I just bought this exhaust http://cgi.ebay.co.uk/ws/eBayISAPI....&pfid=0&fsop=1%26fsoo%3D1&fcl=3&frpp=50&fvi=1

What do you think? Fitting it should be pretty straight forward I think.

 

[Retepetsir]

Bike exhaust, I guess that's what you were after......?!

 

[ollyc98]

yeah, I figure it might give it a nice tone, but being a standard bike exhaust it shouldn't be too loud.

Does anyone know where I can get new exhaust rubbers?

 

[Arnold]

Halfords / anywhere really

It doesnt mention dimensions so would be interesting to know how big or small that is. It might make your car sound like a moped!

 

[ollyc98]

It's off a 1000cc ninja so hopefully it won't sound like an angry bee in a can. It only cost £20 and I need a new exhaust anyway cos the last one has split along the whole length,
I'm gunna chop about with a bit of pipe, and the bracket looks to be in a good position.
If it's too loud I'll buy a Db killer and chuck that down the end.

 

[AMY]

That's a standard can, it will be almost silent, bikes only have one silencer and a really short exhaust so the silencer will be extra quiet on a car.

 

[ollyc98]

That's just what I wanted to hear, However I think it will balance out as I want to remove the cat shaped object near the downpipe, although I'm told my car doesn't have a cat...

 

[Arnold]

Nope you don't have a cat on yours, well you shouldnt have! get a photo for us

 

[ollyc98]

First box:

Second box:

From the back:

 

[Arnold]

I have that same exhaust, and that isn't a cat

 

[ollyc98]

Didn't think so, I guess it must be an expansion box of some sort then...

 

[superls]

its the same as a 'cherry bomb' in effect.

it has a perferated tube down the middle with wadding around it, i chopped mine outand had a look.

 

[ollyc98]

I'll leave it then, but that centre box has to go, i will replace it with a real cherry bomb.
Freeflow, but restricted enough to pop on the deceleration.

 

[superls]

mines straight through to the standard backbox, which has had all of the wadding removed. sounds mint and pops on letting off

 

[squarepants]

would it not be really restrictive with the bike back box on?

 

[ollyc98]

It came off a 1000cc bike, bikes rev up to 16,000 RPM so it will be less restrictive.

 

[squarepants]

lol, just a rumor i heard that they were restrictive, i carnt see how so myself like.

 

[ollyc98]

Well if that's the case i'll chuck it back on ebay

 

[RTLkyuubi]

ive got my old 50cc ped exhaust as a backbox atm being a 2 stroke it top revs is about 6-8k. It will do till i get some cash

 

[ollyc98]

2 stroke is a bad idea on a 4 stroke engine as 2 strokes are tuned to have a reverse pressure wave, this doesn't help when trying to remove gasses.

 

[sonic]

lol, just a rumor i heard that they were restrictive, i carnt see how so myself like.

it shouldn't be restrictive, the bike it comes off produces around 150bhp, those horses need to breathe through that pipe.

 

[Arnold]

But do bikes produce as much exhaust output as a car?

 

[ollyc98]

More as the engine size is equal but bikes rev higher (up to 16,000 RPM)

 

[AMY]

2 stroke is a bad idea on a 4 stroke engine as 2 strokes are tuned to have a reverse pressure wave, this doesn't help when trying to remove gasses.

This is tuned by the expansion chamber, 2 stroke silencers are generally straight through perforated tube. I'm intrigued to see what difference this can you bought makes, I would have gone for a race can and put a cherry bomb up close to the front pipe. Make sure you post up the results.

 

[ollyc98]

I'll put some videos up when it's done

 

[ollyc98]

I have just discovered that first 'cherry bomb' box is actually an exhaust resonator. Which is a very effective silencer.