gthyni
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Posts posted by gthyni
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>Most racebike goes for pods since it is easy to maintain and gives a
>reliable free flow of air (and saves weight too).
Wrong. With FI, most if not all race bikes I've seen, are using specially made and shaped carbon fibre air boxes.
To clarify,
a was thinking amateur racing,
not MotoGP where carbon is cheap
and you do not need filters at all since the
motor is rebuilt for every race.
The "airbox" is then a tuning device to optimise the flow
and length of the air column as described in the excellent document at:
http://www.grapeaperacing.com/GrapeApeRaci...intaketuned.cfm
>Ram-air:
>Destroys aerodynamics (not that if makes much difference on my V11s sans
>fairing). More important it is unreliable and make it hard to map the FI.
>How do you simulate the effect of ramair when running in a bench mapping
>you PowerCommander?
The same way ZX-12R and Haybabusa, as well as other owners do. The FI will still measure out the correct amount of fuel with varying amounts of air coming into the system. I think you're comparing ram air with carbs instead of ram air with FI. Big difference.
My SP-1 was mapped on a Dyno and it has ram air. Ran fine wether the ram air came into effect or not.
And the bit about supporting your pods I have to attribute to the Head Mechanic and Service Manager at my local Guzzi shop. think you maybe getting carb with ramair confused with FI with ram air.
My point was (even if it was clear enough)
I do not think ramair does any real diffence in real life,
it is more a marketing gimmick.
If it had a significant effect it would create problems.
Even an advanced adaptive engine control computer
like the one on BMW M-technic sport cars has limits
to what parameters it works within. It works to adapt to
the natural variantion in temperture, humitity, petrol
quality and altitude, but if you do significant changes
to the flow in intake or exhausts it too has to be remapped.
The problem with ramair (if it works) is that it is not predictable
which would make it impossible to map the FI in an optimal way.
The difference between carbs and FI is a finer granuality in the
"mapping" and a certain degree of adaptivity in the FI unit
(but as said within limits).
But my main point again ramair was that:
I think is mostly hype with no real life effect.
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Hey Al, they are both European products, so probably equal in their superiority!
So is the Marzocchi fork and the Sachs shock,
but Öhlins forks and shocks are "made in Sweden"!
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Found a WP fork with price at RaceCo:
http://www.raceco-uk.com/wheels.html
With triple clamps £975.00 plus VAT
Without triple clamps £765.00 plus VAT
£765 = $1253 = 1066 euros (at least at this moment
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Actually the shorter the intake tract the better top-end and the longer intake tract will produce better lowend power.
Check this for more info.
Excellent read, if a little car centric.
A sport motorcycle has more radical cams and works at higher RPMs
than a car engine.
I went out and measured
I estimate the intake from valve to airbox the column is
about 23cm (9"),
which with a pod directly on the injection unit is reduced
to about 16cm (just above 6"). The intake lenght would
be reduced by 30%.
A moderately shortened manifold and the freer airflow of PODs
should theoretically give more power in the higher RPM range.
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I still think that a good custom fuel and spark map would solve the problems. Have they released the PCIII R yet for our bikes?
not according to the 2003 catalog I downloaded from
http://www.powercommander.com/
BUT Ultimap seems to have that capability, check:
Ultimap should be cheaper than a custom PCIII mapping
since no hardware is required just a workshop with
a dynobench and the Ultimap software.
Ultimap remaps the Marelli 15M instead of adding a secondary computer.
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Kerker Meg:
http://www.supertrappind.com/MotorcycleATV.../meg_series.asp
or the universal 4" external disc megaphone which is available in 2" inlet:
http://www.supertrappind.com/Universals_pa.../universals.htm
should look good on my V11.
Either way I think you have to throw together some mountpoint
yourself.
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RamAir is the way to go!
Wow,
that was UGLY
I wont even tell you what it reminds me of since this is a family site
Another reason not to go for ramair beside the technical doubts.
If you really need more air and are not afraid of "uglifying" your poor
Guzi why not go for turbo charging.
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Has anyone used supertrapps on Guzzis or otherwise?
Experience - quality, sound, added performance?
http://www.supertrappind.com/MotorcycleATV...rtbike_page.htm
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The pods are just drawing from an even larger still air mass (the room) than with the airbox installed. Of course it'll make more power on the dyno that way...
Unless FBF runs their pod kit on a dyno in a wind tunnel we'll never know.
Hmm,
since the pods is closer to the engine they will suffer from more
from the engine heating the air around them on the bench
than in real life too.
So it will be hard to tell if pods has an advantage or disadvantage
conpared to the air box when running on the bench.
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How much were they John?
al
I'm not John, but I can give an answer anyway.
I see prices for the fork on the web around $2500 or the same amount of
euros or 22000 swedish kronor for the forks and about 6500 swedish kronor
or about $600 for the rear damper.
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2 non-technical reason to go with pods:
1. looks - pods looks more like a race bike and without the airbox
you get a lighter more classic italian sportbike look.
2. sound - I have a K&N on my BMW car engine. Sound great when you accelerate.
Technical:
An engine runs on air (with a little petrol added), on a four-stroke
engine we would want free non-turbulent flow as possible of cold air.
(Cold air is richer in oxygen and have bigger mass per volume than warm)
I am sorry to say that a reliable freeflowing non-heated airstream is
difficult to find on a bike, so we need a compromise.
Most racebike goes for pods since it is easy to maintain and gives a
reliable free flow of air (and saves weight too).
Ram-air:
Destroys aerodynamics (not that if makes much difference on my V11s sans
fairing). More important it is unreliable and make it hard to map the FI.
How do you simulate the effect of ramair when running in a bench mapping
you PowerCommander?
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I asked Öhlins about V11 forks since they are not
featured on there website http://www.ohlins.se/
I got the answer that V11 forks are sold (probably
due to contract issues) exclusively by Moto Guzzi.
Someone (not officially) mentioned the a Monster fork
probably would fit OK.
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Raask has decibels och minizooms with 2" inlets
Check the "sport" link at:
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Roberto,
I am interested to.
I hasa rattling like something is loose in the clutch housing
,it would be interestng to know the probable cause,
so I know if I can ride it to the upcoming service or
has to fix it myself before that.
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Hej Tommy,
raise your hand.
I live in Sweden too but at the other end of the country (Luleå).
I actual does not have my MG yet, I am picking it up on friday in southern
Sweden and will ride it home hopefully without being hit by a snowstorm
I am 40 years old and have always liked Italian and British motorcycle,
I currently own a 1970 BSA twin
which I will probably keep for shorter runswhen the sun shines. The V11 I am picking up is for longer trips then I trust
to the Beeza for.
I am also a member of Svinkallt MC the friendly biker club of my former home
town Kiruna, probably one of the most northern clubs in the world.
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Very nice indeed,
a classic look
as opposed to big slipons which looks like ventilation tubing
WP
in Technical Topics
Posted
Only we try to stand out from the rest of Europe
by producing superior products like Öhlins forks and shock
(You started this)
As for Scandinavia:
Your getting old Jaap (left school too long ago).
Sweden, Denmark and Finland is part of EU nowadays,
Norway and Iceland is not.
callison wrote:
> Ohlins is owned by Yamaha. Where do we go from here?
Majority-owned buy Yamaha,
the founders still holds a minority share and
controls the daily operation of the company.