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Making A Small / Flat Silencer


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#1 sledgehammer

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Posted 13 May 2018 - 01:04 PM

anyone got details on a site that gives info on compact silencers

 

I got some speed bumps that are quite high & small radius , at work & they are killing my exhaust

 

Ive got the body adjusted as high as I want to go - still hits the front of the can (skid plated the front as well)

 

even motorbike silencer (disc type , but enclosed) would be something https://www.summitra...-1705/overview/

 

it's a 998 side exit before the back wheel - so the can is in tunnel (cannot exit behind wheel due to configuration)

 

got tonnes of welding / folding equipment at work - just need ideas for something compact

 

using a standard pee shooter can at the moment

 

anyone know a way of putting a motorbike disc type into a small can


Edited by sledgehammer, 13 May 2018 - 01:09 PM.


#2 sledgehammer

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Posted 13 May 2018 - 01:14 PM

starting to think a type of cherry bomb - but a quiet one

 

super trapp keeps coming up for bike exhausts


Edited by sledgehammer, 13 May 2018 - 01:19 PM.


#3 nicklouse

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Posted 13 May 2018 - 01:15 PM

oh super trapp. dont bother.

 

ok i have no idea where your exhaust is going. if can in the tunnel is catching remove it.



#4 sledgehammer

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Posted 13 May 2018 - 01:45 PM

super trapp is no good then ?

 

thinking of removing speed bump - too high for a classic



#5 Cooperman

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Posted 13 May 2018 - 02:26 PM

Everyone who has ever built a rally Mini has thought about this.

I have never found a solution which is quiet enough and I use a skidded Maniflow rear box with a Cherry Bomb in between that and the LCB.

My suspension ride height is about 1/4" higher than standard and I can still hit some of those really aggressive speed humps - bloody things!



#6 Will16

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Posted 13 May 2018 - 02:27 PM

Why not just have a single box rc40 system or similar with no middle box? Only thing that might scrape then is the y piece

#7 sledgehammer

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Posted 13 May 2018 - 02:39 PM

Everyone who has ever built a rally Mini has thought about this.

I have never found a solution which is quiet enough and I use a skidded Maniflow rear box with a Cherry Bomb in between that and the LCB.

My suspension ride height is about 1/4" higher than standard and I can still hit some of those really aggressive speed humps - bloody things!

what annoys me is the car is already seems higher than normal

 

I wasn't after the low ride look

 

just normal usable mini

thanks for all the reply's

pot holes are bad enough - without the stupid 'traffic calming'

 

looks like skid plates & sacrificial plates it is - may put blades on them to wear the speed hump down


Edited by sledgehammer, 13 May 2018 - 02:58 PM.


#8 nicklouse

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Posted 13 May 2018 - 04:24 PM

lets see what you have there are some none standard configuration mentioned.



#9 mini13

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Posted 13 May 2018 - 04:32 PM

do the speed humps meet the regulated size?



#10 sledgehammer

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Posted 13 May 2018 - 05:04 PM

lets see what you have there are some none standard configuration mentioned.

 

 Defiantly non standard - quite good despite the look of it

 

exiting on the o/s just in front of rear wheel

it is tight to the inner tunnel / close to the gear selector

 

the car has a fuel tank in the rear subframe space where the rear box would fit - hence the problem

 

had a pic - but can't remember how to get it in media folder

 

anyway back to work - thanks for replys



#11 Ethel

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Posted 13 May 2018 - 05:12 PM

998's are about 10mm shorter than 1275's perhaps you could gain a little bit there if it's a generic exhaust manifold. You might be already, but going over bumps at an angle helps. Also being on your brakes as hit the bump and accelerating on the way off - if the bump's wide enough.



#12 nicklouse

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Posted 13 May 2018 - 05:12 PM

so then you want to have the silencer in the tunnel and have the exit flat across the floor and curling round the sill finishing in a nice rounded oblong. similar to the old Fords.



#13 sledgehammer

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Posted 13 May 2018 - 05:44 PM

so then you want to have the silencer in the tunnel and have the exit flat across the floor and curling round the sill finishing in a nice rounded oblong. similar to the old Fords.

 

thats the way it is

but rounded hole - not oblong tweaked upwarrd a tad



#14 nicklouse

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Posted 13 May 2018 - 06:07 PM

Attached File  side exit.JPG   24.95K   2 downloads

 

make it flatter then.






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