DorsetStrider
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| posted on 4/7/05 at 06:26 PM |
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Exhaust Query
Ok boys got a quandery for you all.
I've decided to change my plans from Mid engined to front engined. I can do this without too much hassle and it will save a whole load of
potential problems BUT..... there's always a "but" isn't there?.....anyway.....
BUT this does present a problem with the exhaust. I really REALLY want to avoid an external exhaust and I'm guessing there won't really be
enough room under the car. I have thought of two possible solutions....
1) As the tranmission tunnel is largely going to be empty (the engine is an old alfa 33 so if engine is at the front it will be fwd) how about if I
built a sealed tunnel comprising the bottom half of the transmission tunnel and feel the exhaust pipes through there.... the only drawback is how do I
avoid heat build up?
2) What about if the exhaust pipes ended at the front sides? a' la spitfire/hurrican aircraft? I was thinking at the bottom imediately behing
the front wheels (where some manufactures are currently putting air venty type things)..... pit fall of this idea is that how would Mr SVA man view
it?
Any help, advice, suggests or comments always gratefully received.
Who the f**K tightened this up!
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MkIndy7
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| posted on 4/7/05 at 06:36 PM |
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I'm pretty sure the Mclaren SLR has its exhausts just after the front wheels it should be Ok.
But please please please stick with the RWD not sure what your reasons are for changing your idea but FWD is just so pants!
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Guinness
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| posted on 4/7/05 at 07:02 PM |
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I thought about having the silencers inside the bonnet and the exhausts coming out behind the wheels.
Mainly because I'm having a nightmare with getting one made in stainless and that way I could do it in mild (and it wouldn't be seen).
There's loads of room to do it on a BEC and in fact I saw the Toniq boys had done just that with there show car at Stoneleigh, although I
don't know if that would pass SVA.
Mike
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Triton
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| posted on 4/7/05 at 07:13 PM |
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Guiness,
What engine are you using..If it's a bike motor......take the pipe work the drivers side not down passenger side....that way the primary
pipes(downpipes) are not compromised and the secondary jobbies can be made longer which on a bike motor makes more power........
why everyone goes down passenger side with a BEC beats me!!! apart from it's cheap to do
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Guinness
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| posted on 4/7/05 at 08:29 PM |
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Cheers Mark
It's a ZZR1100, and I got a lurverly set of titanium downpipes for next to nowt from a scrappy to do just that. But they hit right in the middle
of the chassis rail, and I don't fancy chopping that out at this stage.
Unless there is a really good welder / fabricator who'd like to come to Newcastle and do it??
See attached photo's:-
 
Side View Exhaust Chassis
 
Front View
Do you think this would support the bottom of the engine enough?
Cheers Mike
(sorry for the hijack Dorset)
[Edited on 4/7/05 by Guinness]
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Triton
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| posted on 4/7/05 at 09:12 PM |
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Guiness,
Add the new rails first then chop the ones out that are getting in the way of fitting the downpipes.....this will make your life easier as the
bike's downpipes will fit just dandy....about all you will need is a 90degree bend and some extra tube to get it out the other side and down
under your ear.......just make sure you wrap the pipe where it gets close to anything.....as they get a tad warm
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Triton
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| posted on 4/7/05 at 09:15 PM |
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Ti pipes will need to be tig welded so mod the chassis and have the benefit of a decent exhaust .....that's what i would do anyway
Mark
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Hellfire
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| posted on 4/7/05 at 09:46 PM |
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quote:
Originally posted by Triton
Guiness,
What engine are you using..If it's a bike motor......take the pipe work the drivers side not down passenger side....that way the primary
pipes(downpipes) are not compromised and the secondary jobbies can be made longer which on a bike motor makes more power........
why everyone goes down passenger side with a BEC beats me!!! apart from it's cheap to do
Passenger side is for a few reasons:
They exit straight out the side - keeps heat down.
They exit out the side - keeps headers almost same length as on bike - more power.
I would question your statement where longer pipes means more power... have you any evidence to back this up?
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