Bob C
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| posted on 5/3/05 at 12:08 PM |
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I'm quite interested in how folk have done V8 exhausts in their 7's.
Your normal V8 exhaust system has a crossover pipe between the two bank exhausts about 5 or 6 feet away from the engine and this apparently releases
quite a lot of power!
Obviously this is impossible in a 7 with a bank exhaust on each side.
In my mazda I couldn't do the crossover pipe thing, so I paired cylinders an a 3/5 beat (best of a bad job) i.e. 1&5 3&7 2&4 and
6&8
Has anyone got a reference for exhaust tuning on V8s? (and not the flat plane exotics)
On yeah - re: this thread - with the exhaust in the tunnel of a v8 you can easily do the crossover pipe to make the exhaust work better.
Cheers
Bob
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quattromike
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| posted on 5/3/05 at 07:04 PM |
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Hi all, first off thanks for the good advice comming in,
and to marks question: I have made the tunnel alot wider in my chasis measuring 210mm inside at the top and 240mm at the bottom sloping over to the
pasengers side at the bottom and still have 550mm in the cockpit for the seat, so it leaves some room spare in the tunnel.
i was planning to take the exhaust low enough to pass under the diff and then split it to each side with 2 small back boxes then out at each side.
then hopefully plum the fuel tank it above somewhere. ther is still along way to go in planning and building the chasis alone but i'll get
there
Mike.
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tks
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| posted on 11/4/05 at 08:40 AM |
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mixed....
i Think the idea is a nice one..
Donkervoort does it to.....
BUT they also do other stuff different then we do, so i think that if you want to change the exhaust layout you need to change more..(fuel
tank??)..
also the heat amount is impressive....
just think 35degrees and you ar e stuck in traffic jam?? the heat build up is high..
very high.. if i was you and you want it then do it, but choose another route for the fuel and electrics etc...maybe in another sperratute tube or
something....
the heat is the one to beat..
and while driving it will be ok....
TKS
p.s my bike exhaust pipe near the head after just starting lets say 3min. are hotter then 350degrees...
20cm away my device can measure it again 320degrees...
and you cant see it they are...
but i think you need a good isolation method....soo in fact i will go for a double floored tunnel if you get what i mean..??
on the first bottom you put prop and electrics and fuel then you put a floor and there you put the exhaust..
and the brakes you put away but still on the bottom of your car...or also near the electrics..
TKS
The above comments are always meant to be from the above persons perspective.
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quattromike
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| posted on 15/4/05 at 10:25 AM |
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quote:
Originally posted by tks
just think 35degrees and you ar e stuck in traffic jam??
TKS
Hi mabey you never noticed but i live in scotland, if it gets above 30degrees it's declared a national holiday! and trafic jam, the olny time we
have one of those is when we're shifting coos. 
the false bottom idea might work to keep the heat out a bit, though it wont help when it comes to the rear diff where it gets a bit close and i think
if i wrap the exhaust with heat poof sleve local to the diff it might help a bit
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