Mave
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| posted on 14/7/04 at 02:48 PM |
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2 bike cans, on a Zetec powered Seven?!?!
Would this work?!?!
I imagine having one on the left side, and one one the right. Cans from Yamaya R1's, or Fireblade.
What would be the problems I'll have to face? Noise? Flow?
The plan is to use let the manifold go from 4 to 1, then go forward in the engine bay, split it into left and right, and exit on both sides of the
car......
Bad idea? Or worth a try?
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ned
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| posted on 14/7/04 at 02:57 PM |
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extra weight and could be tricky routing the pipes...
be careful they meet noise requirements too.
Ned.
beware, I've got yellow skin
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DaveFJ
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| posted on 14/7/04 at 02:59 PM |
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point ?
Dave
"In Support of Help the Heroes" - Always
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adampage
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 posted on 14/7/04 at 03:46 PM |
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Good idea
Actually I agree - I've always wanted a 'symmetrical' exhaust arrangement - either none on either side, or 1 each.
Are there any clever tricks, or is it just too difficult?
Cheers,
Adam.
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Mave
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| posted on 14/7/04 at 04:01 PM |
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The point?!?! Do we need a point to do crazy stuff? Dare to be different 
I just like the looks.
My theory is, that two bike 900-1000 cc bike cans should be able to provide enough flow, and damping for a sluggish 2L car engine. But if anyone has a
better theory, I'd be very happy to hear about it!
I've checked out the space in my Indy; it is rather limited on the exhaust-side (mainly because I'm building a LHD-car). But I can go down
from the manifold to the bottom of the chassis. From there I can follow the shape of the chassis to the front, and to the other side. The underside of
the tubing (what diameter should I take? 40-50 mm?) can hang around 20 mm (or even more) lower than the chassis rails, which would be good for
cooling.
On the inletside, the tubing should go up again, and exit the bodywork behind the oilfilter.
Well, that's the theory. I'm seriously interested in your opinions!!
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kingr
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| posted on 14/7/04 at 04:13 PM |
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One bike can should be more than enough - take my R1 engine for instance - capacity 1 litre, max RPM 12750, the flow rate is going to be very similar
to a 2 litre engine doing 6000-6500 RPM.
I honestly wouldn't bother with routing it to both sides - most people simply won't notice and those that do will just think it's a
bit weird, or you're trying to make it look like you've got a V8, the flow will be shot to bits, it's going to be a nightmare to do
yourself or cost a fortune to get someone else to do it.
If you really, really badly want exhausts both sides, you'd be better off buying a V8 and using that, it would sound better too.
Kingr
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Mave
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| posted on 14/7/04 at 04:31 PM |
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I think you're right about the flow. But how about the noise?
Going both sides is definately gonna be a challenge, but if it doesn't work, I would still like to use a bike can, as (I think) they look great,
compared to most car-cans.
I hope someone has some hands-on experience.
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sgraber
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| posted on 14/7/04 at 09:40 PM |
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Most stock bike cans have a label with the dBa rating right on them.
I have double Hayabusa cans ($5 on ebay - brand new!) on my car and it is fairly quiet. You can listen to it run by watching some of my videos. Try
'First Drive' at the bottom of my video page.
I would suggest that running an exhaust to both sides of the car does not make the most sense, but if you were to do so you should collect all 4 into
1 first so as to not lose the scavanging effect. You will probably see lower torque numbers, but I could be talking out my arse on that subject as I
am simply parroting what I have read around.
But I do know that Bike cans sound good with the 4AGE, which is reported to be extremely loud when unbaffled.
Steve Graber
http://www.grabercars.com/
"Quickness through lightness"
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Mave
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| posted on 15/7/04 at 03:38 PM |
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But the dB is also influenced by the engine I pressume? So if you use a can for an engine it is not meant for, I guess the dB value on the can is of
no meaning. Right?
My plan was to go from 4 into 1 before splitting to the two silencers. But if one R1 can could do the trick (provide enough flow, backpressure, AND
sound deadening), then I might just use one.
Could anyone confirm? (I'm talking about the titanium R1 can, not the carbon one).
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James
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| posted on 15/7/04 at 03:46 PM |
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Having 2 does atleast give the benefit that both you AND your passenger can burn their legs on stuff- not just one of you!
James
... who saw Merlin's leg after he stood against Conrod's hot exhaust- the term 'bubbly' springs to mind! 
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Mave
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| posted on 15/7/04 at 04:38 PM |
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I planned on placing them like the Quantum Extreme Cyclone (the two-bike-engines-melted-together V8 engine); it has the cans more to the front, so no
burning!
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Mave
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| posted on 18/7/04 at 10:27 AM |
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Just bought the first silencer. Very tasty...
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Liam
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| posted on 20/7/04 at 04:09 PM |
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If you only want two for looks, why not just have only one of them connected to the engine, and the other one sitting there looking good?
Liam
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