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Bike exhaust on a car engine?
sprouts-car - 15/1/10 at 11:01 AM

The title says it all really.
Can a bike silencer be used on a car engine?
As bike's cans are normally visible they are generally made to look nicer.

What do people thing?

Thanks
Chris

l0rd - 15/1/10 at 11:04 AM

Don't see why not.

tomprescott - 15/1/10 at 11:10 AM

The only problem I can see is with pipe diameter, my bandit bike exhaust is maybe an inch and a half into the silencer, I'd want at least a 2" (but probs a 3" exhaust system on the locost.

aitch - 15/1/10 at 11:14 AM

should be able to ive sold several exhausts to people to use on kit cars most recently a special 6" diameter with 3" bore straight through carbon fibre race can.. although this is being used in series for track days to meet noise regs

aitch

tomprescott - 15/1/10 at 11:20 AM

Well with those bore's the jobs a good'un!

speedyxjs - 15/1/10 at 11:20 AM

Its been done plenty of times before and until one of the silencers blew on the jag, i was planning to use an r1 can on mine!

02GF74 - 15/1/10 at 11:21 AM

many on here are using R1 can on car engine.

biggest problem is the diameter - bike can is much bigger than car ehxaust but nothing a bit of tubing and welding cannot fix.

Once I get my engined fixed, I pan to fit R1 carbon can onto my crossflow ... so watch this space in about a month or two time.

Mr Whippy - 15/1/10 at 11:22 AM

done it before, no issues at all apart from how disappointingly quiet my carbon can turned out. Though on a good note I could easily hold the outside of the can even after a run as it doesn’t get very warn at all and it weights hardly anything.

A1 - 15/1/10 at 11:53 AM

surely the pipe dia is too small on a bike can? wont this reduce flow lots...kinda rendering the whole exersis pointless?
dependant on the engine...

Mr Whippy - 15/1/10 at 12:34 PM

quote:
Originally posted by A1
surely the pipe dia is too small on a bike can? wont this reduce flow lots...kinda rendering the whole exersis pointless?
dependant on the engine...


nope, mind say a 1200 bike for example, although the engine is of smaller capacity its also can rev about twice as fast so the max flow rate is also twice as much as a 1200 car engine would be. Just look at the bhp figures to give you an indication of how much they can flow through.

speedyxjs - 15/1/10 at 12:34 PM

quote:
Originally posted by A1
surely the pipe dia is too small on a bike can? wont this reduce flow lots...kinda rendering the whole exersis pointless?
dependant on the engine...


Most engines rely on a certain amount of back pressure. This pipe reduction would help that.

l0rd - 15/1/10 at 12:45 PM

quote:
Originally posted by speedyxjs
quote:
Originally posted by A1
surely the pipe dia is too small on a bike can? wont this reduce flow lots...kinda rendering the whole exersis pointless?
dependant on the engine...


Most engines rely on a certain amount of back pressure. This pipe reduction would help that.


Free flow exhaust means better BHP torque but loose top end speed.

Restricted exhaust means the oposite.

Andi - 15/1/10 at 01:04 PM

Mate of mine has just put 2 zx6 carbon type cans on his new v6 2.8 conversion.
Sounds the dogs!

A1 - 15/1/10 at 01:19 PM

oh yea, cheers...should think before I cybertalk.

MikeRJ - 15/1/10 at 01:48 PM

quote:
Originally posted by l0rd
Free flow exhaust means better BHP torque but loose top end speed.

Restricted exhaust means the oposite.


More BHP means a higher top speed whichever way you look at it.

Some back pressure can help low RPM torque one engines with wild cams, but it's nearly always something to be avoided.

If a bike can flows well enough to make 150bhp on a bike engine then it will be good enough for a car engine making similar power.