40inches
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| posted on 21/4/09 at 05:56 PM |
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What's this do then?
Anyone got any idea what effect linking the downpipes like this has on performance?
.JPG)
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meany
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| posted on 21/4/09 at 06:04 PM |
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from this link.
http://www.torquetechexh.com/whichsize.htm
Balance Tubes (or 'H' pipes) help to even out the pulses in the exhaust gases and balance the backpressure between both banks of your
engine. They not only help improve horsepower, but sound as well. To find the right location to install your balance tube, apply a strip of paint down
the front portion of the exhaust pipes. The balance tube should be placed where the paint burns off (bubbles) on the exhaust pipes. Generally, put the
balance tubes as close to the headers as possible. The balance tube diameter should be at least 75% of the diameter of the pipes with which it
connects.
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NigeEss
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| posted on 21/4/09 at 07:57 PM |
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"Balance the backpressure" ??WTF ?
So it's a way of making the best of a poorly designed exhaust. system !
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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owelly
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| posted on 21/4/09 at 08:26 PM |
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That link seems to lead to a bunch of idiots........
From what I have gleaned from the www, link/balance pipes are mainly used to quieten the exhausts by 'sharing' the energy in each pulse
between each silencer. That should also mean that by 'sharing' the energy, it must be letting the stinky gasses out easier. This theory is
for V engined cars running two main pipes and two banks of silencers. Quite what those link pipes are for is beyond me. I suppose that they are in
fired opposite pairs so that would make it sound nicer!!
http://www.ppcmag.co.uk
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Chippy
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| posted on 21/4/09 at 10:11 PM |
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A correctly placed ballance pipe can "sometimes" add power, but will always improve the silencing. They are usually used on V6's and
V8's with twin pipe systems, and possitioned just behind the bell housing, they can be a fair bit smaller than the actual exhaust pipe size. I
have never seen them fitted as per the picture, and can see no good reason to put them there. Cheers Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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MikeR
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| posted on 21/4/09 at 10:31 PM |
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could they be there not to balance the exhausts but to hold them together????
Ie the same as welding a strip of steel between them??
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40inches
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| posted on 22/4/09 at 12:28 PM |
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They are genuine Kawasaki pipes (are stamped Kawasaki Heavy Industries on collector) Guy I got them from said they came of his racing Quacker and are
a factory fitment.
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40inches
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| posted on 27/7/10 at 08:46 PM |
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Holly thread resurection Batman
After asking on ZX9R.net, it seems that this header is the standard one from a ZX9R-E and is a popular upgrade on the 'C' gives increase
in power in mid and top end, with no downside at bottom end 
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ginger ninja
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| posted on 28/7/10 at 06:52 AM |
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there could be a several things going on which could confuse this discussion. Firstly the jetting of the carbs on the E series onward is different in
so much as the outer two cylinders have a different jet size to the inner two, which corresponds to the exhaust link arrangement, not sure why this
is...anyone comment ?. The increase in power from the C model is most likely due to the increase diammeter of the later E series exhaust ports and
down tubes, and may not be due to the links at all. One reason not already mention is the effect of puse scavenge which is used to help clear the
gases from the port exhausing. However, I'm no expert and could not decide why these were used. My ZX9 E motor runs without links on a
fabricated manifold, and with a stage 1 dynojet kit, pipercross filter and IXIL can made 147 BHP and 72 lb.ft torque at the rolling road
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NigeEss
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| posted on 28/7/10 at 08:37 AM |
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As far as I'm aware running different size jets in the inner cylinders is to keep combustion temperature sightly lower.
Seen more commonly on air cooled lumps.
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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