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TuneBoy? was Re: Bathurst 1000
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G-S  
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 More options Oct 27, 7:09 am
Newsgroups: aus.motorcycles
From: G-S <ge...@castbus.com.au>
Date: Tue, 27 Oct 2009 07:09:37 +1100
Local: Tues, Oct 27 2009 7:09 am
Subject: Re: TuneBoy? was Re: Bathurst 1000

JL wrote:

> The Bandit 1200 4 cylinder referenced above had oodles more grunt -
> it's peak torque was pretty flat from down around a thousand rpm right
> through to a relatively low redline for a 4 (errmm 9-10 grand mebbe ?
> I forget now).

9500 I think, I forget too.

A Bandit 1200 has more low down torque than any twin I've owned or
ridden with the exception of an M109.

G-S


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JL  
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 More options Oct 27, 9:04 am
Newsgroups: aus.motorcycles
From: JL <jlitt...@my-deja.com>
Date: Mon, 26 Oct 2009 15:04:49 -0700 (PDT)
Local: Tues, Oct 27 2009 9:04 am
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Oct 26, 10:43 pm, Lars Chance <lars.cha...@hotmail.com> wrote:

No. But well done for being predictable.

<speaking very slooooowly for the denser members of the class> The
power characteristics you like are unrelated to the number of
cylinders and totally related to the engine config.

> ...... and you called ME stupid?

I didn't actually - I provided that as one of the two possible
options. However you're starting to convince me that was the correct
choice.

JL


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JL  
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 More options Oct 27, 9:21 am
Newsgroups: aus.motorcycles
From: JL <jlitt...@my-deja.com>
Date: Mon, 26 Oct 2009 15:21:59 -0700 (PDT)
Local: Tues, Oct 27 2009 9:21 am
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Oct 26, 10:53 pm, Hammo <ha...@aapt.net.au> wrote:

Yeah undoubtably - you trained him well :-) If he's not you of course

> Post some dyno graphs or something......

> Oh, all elephants are grey, but not all grey things are elephants would have
> been better than the redhead example.

Awww, I was gentling tickling for a thread diversion there - both
Betty and Toosmoky can usually be incited on that topic :-)

> Hammo
> Going for science rather than seat of the pants....though that can depend on
> the pants.......

You and I both know that's a diversion, in your best tradition.

I'm pretty sure you KNOW the science:
"Low down grunt" aka "high levels of torque at the bottom of the rev
range" is a function of engine config - long stroke motors with
(comparatively) fewer smaller valves, narrower exhausts and narrower
inlet tracts will provide more torque down low in the rev range at the
expense of HP at the top end of the range when you compare two engines
with the same number of cylinders and same capacity.

The number of cylinders is irrelevant to the engine torque/hp trade
off.

For the same capacity and stroke a 4 will have smaller pistons than a
twin. That config will leave the 4 with more torque down low than the
twin as it will be more under square. There's a physical limitation on
max piston speed with current metallurgy so the usual trade off is to
make the 4 closer to over square so you can rev it higher - torque
goes down and HP goes up with the rev limit (in simple terms - there's
more to it than that). The general outcome for non sports bike is a
bit more of both than a twin for the equivalent capacity and stroke.
For sports bikes a lot more HP and about the same torque.

JL


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JL  
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 More options Oct 27, 9:38 am
Newsgroups: aus.motorcycles
From: JL <jlitt...@my-deja.com>
Date: Mon, 26 Oct 2009 15:38:12 -0700 (PDT)
Local: Tues, Oct 27 2009 9:38 am
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Oct 27, 7:09 am, G-S <ge...@castbus.com.au> wrote:

> JL wrote:

> > The Bandit 1200 4 cylinder referenced above had oodles more grunt -
> > it's peak torque was pretty flat from down around a thousand rpm right
> > through to a relatively low redline for a 4 (errmm 9-10 grand mebbe ?
> > I forget now).

> 9500 I think, I forget too.

> A Bandit 1200 has more low down torque than any twin I've owned or
> ridden with the exception of an M109.

Ditto in my opinion, noticeably more than a 2004 Guzzi Le Mans 1200
twin in my opinion ( I rode them back to back at the time) and I would
think the Guzzi is closer to the torque side of the trade off than the
HP side (although the newer 4V head would def be a move back towards
max HP)

JL


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JohnO  
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 More options Oct 27, 9:45 am
Newsgroups: aus.motorcycles
From: JohnO <varc...@msn.com>
Date: Tue, 27 Oct 2009 09:15:00 +1030
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Mon, 26 Oct 2009 12:31:58 GMT, Lars Chance

Can't be... too young!

Johno <I think>

Beer?


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LC  
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 More options Oct 27, 1:07 pm
Newsgroups: aus.motorcycles
From: LC <lars.cha...@hotmail.com>
Date: Mon, 26 Oct 2009 19:07:46 -0700 (PDT)
Local: Tues, Oct 27 2009 1:07 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Oct 27, 8:04 am, JL <jlitt...@my-deja.com> wrote:

Is there a reason you keep explaining the *blindingly obvious* like it
has some sort of relevance to the thread JL?
Blind Freddie's deaf 4yo knows that long-stroke is a factor in
torquiness.
Here; let me help you with some more fascinating revelations:
Water is wet.
The sky is blue. (1)
Fire is hot.
Nigerian emails are sometimes dishonest and
V-Twin motorcycles almost always have more low-down grunt than
equivalent 4cyl motorcycles (despite the seemingly collective
aus.motorcycles delusion to the contrary).
--
LC.

(1) Scientists can prove that the sky isn't really blue too.


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JL  
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 More options Oct 27, 4:56 pm
Newsgroups: aus.motorcycles
From: JL <jlitt...@my-deja.com>
Date: Mon, 26 Oct 2009 22:56:17 -0700 (PDT)
Local: Tues, Oct 27 2009 4:56 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Oct 27, 1:07 pm, LC <lars.cha...@hotmail.com> wrote:

Right so now you finally admit that you were carefully ignoring the
bleeding obvious while trying to prove a untenable position.

JL
Yes I kept explaining the bleeding obvious ever yet more simply
because you were making it clear you were struggling to get it (or
pretending to)


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LC  
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 More options Oct 27, 7:22 pm
Newsgroups: aus.motorcycles
From: LC <lars.cha...@hotmail.com>
Date: Tue, 27 Oct 2009 01:22:43 -0700 (PDT)
Local: Tues, Oct 27 2009 7:22 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Oct 27, 3:56 pm, JL <jlitt...@my-deja.com> wrote:

You're getting silly now JL.  I was *ignoring* your obvious because it
was irrelevant.  No-one had questioned anything about engine design
affecting torque and no one has expressed any interest in it at all
(except yourself) so it *remains* irrelevant.
No one has mentioned fuels yet either; are you going to get all
hysterical and dribbling over them next?
--
LC.

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Lars Chance  
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 More options Oct 28, 12:45 am
Newsgroups: aus.motorcycles
From: Lars Chance <lars.cha...@hotmail.com>
Date: Tue, 27 Oct 2009 13:45:46 GMT
Local: Wed, Oct 28 2009 12:45 am
Subject: Re: TuneBoy? was Re: Bathurst 1000
Bill_h wrote:

> One of the gruntiest bikes (at low revs) I've ridden was the K100RT I had
> a while back. Under-square motor (stroke dimension greater than the bore
> dimension) and it would pull cleanly from 1500 revs. A four cylinder bike
> and grunty right through the rev range. Dunno if there is anything else
> on the market currently that is under-square (with the exception of the
> likes of Enfield Bullets).

> What I've seen of big sports twins is that they are way over-square,
> giving lots of hp and torque, but further up the rev range.

Yep; the K100's certainly torquey all right.
http://www.ibmwr.org/ktech/dyno-update/index.shtml

Yet the humble, air-cooled, carby R100 develops more torque and from
1500rpm lower.
http://www.bmwmoa.org/forum/showthread.php?t=34800

--
Elsie.


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Lars Chance  
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 More options Oct 28, 12:45 am
Newsgroups: aus.motorcycles
From: Lars Chance <lars.cha...@hotmail.com>
Date: Tue, 27 Oct 2009 13:45:33 GMT
Local: Wed, Oct 28 2009 12:45 am
Subject: Re: TuneBoy? was Re: Bathurst 1000

I can't find a LeMans 1200 (do they even exist?) but the 1200 Griso
(with the 4V head)
http://www.motorcycle-usa.com/PhotoGallerys/xlarge/09_hd_guzzi.jpg

leads the 1200 Bandit until about 3700 then falls into a rather large
hole just as the Bandit starts coming on strong
http://www.factorypro.com/images/dyno_chart_s7410.jpg

The BMW R1200R kills the Bandit all the way though
http://www.webbikeworld.com/BMW-motorcycles/bmw-r1200r/r1200r-torque-...
(Nm -> foot-pounds is about .74 so 82Nm is 60 and 117Nm is 86)

--
Elsie.


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Lars Chance  
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 More options Oct 28, 12:46 am
Newsgroups: aus.motorcycles
From: Lars Chance <lars.cha...@hotmail.com>
Date: Tue, 27 Oct 2009 13:46:58 GMT
Local: Wed, Oct 28 2009 12:46 am
Subject: Re: TuneBoy? was Re: Bathurst 1000
Sorry for the repost people.

--
Elsie.


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alx  
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 More options Oct 28, 3:28 am
Newsgroups: aus.motorcycles
From: alx <alxr...@gmail.com>
Date: Tue, 27 Oct 2009 09:28:57 -0700 (PDT)
Local: Wed, Oct 28 2009 3:28 am
Subject: Re: TuneBoy? was Re: Bathurst 1000
On Oct 27, 7:22 pm, LC <lars.cha...@hotmail.com> wrote:

I'd be willing to just settle for your own confession of being stupid.
But did you have to praise JL for supposedly making that claim on your
behalf?

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Moike  
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 More options Oct 28, 7:27 am
Newsgroups: aus.motorcycles
From: Moike <bmwmo...@gmail.com>
Date: Wed, 28 Oct 2009 07:27:15 +1100
Local: Wed, Oct 28 2009 7:27 am
Subject: Re: TuneBoy? was Re: Bathurst 1000
Lars Chance wrote:
> Sorry for the repost people.

Some of us don't mind being reminded.

Moike
('79 R100RS)


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G-S  
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 More options Oct 28, 8:11 pm
Newsgroups: aus.motorcycles
From: G-S <ge...@castbus.com.au>
Date: Wed, 28 Oct 2009 20:11:50 +1100
Local: Wed, Oct 28 2009 8:11 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000

Lars Chance wrote:

> I can't find a LeMans 1200 (do they even exist?) but the 1200 Griso
> (with the 4V head)
> http://www.motorcycle-usa.com/PhotoGallerys/xlarge/09_hd_guzzi.jpg

> leads the 1200 Bandit until about 3700 then falls into a rather large
> hole just as the Bandit starts coming on strong
> http://www.factorypro.com/images/dyno_chart_s7410.jpg

A couple of points.

I mentioned in an earlier post that you can't directly compare results
from one dyno with another dyno because they aren't calibrated.

Secondly you are ignoring gearing, the Bandit is stronger at slower
speeds because it's got a lower first gear.

How do I know?

Well I currently ride and own a 1200 Moto Guzzi and I've owned 3
separate Suzuki Bandit 1200's (although at the moment I have a Suzuki 1100).

Believe me, the Bandit DOES have more torque down low and will pull away
from the guzzi at any speed you care to name.

But the Guzzi FEELS much nicer :)

G-S


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Zebee Johnstone  
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 More options Oct 28, 8:31 pm
Newsgroups: aus.motorcycles
From: Zebee Johnstone <zeb...@gmail.com>
Date: Wed, 28 Oct 2009 09:31:57 +0000 (UTC)
Local: Wed, Oct 28 2009 8:31 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000
In aus.motorcycles on Wed, 28 Oct 2009 20:11:50 +1100

And looks nicer too!

I also note that pretty well everyone who rides  the new 4V Guzzis
says they lack down low.

Zebee


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Lars Chance  
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 More options Oct 28, 9:40 pm
Newsgroups: aus.motorcycles
From: Lars Chance <lars.cha...@hotmail.com>
Date: Wed, 28 Oct 2009 10:40:08 GMT
Local: Wed, Oct 28 2009 9:40 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000

I don't know anything about them and I've never ridden one so I've only
got opinions and graphs to assess it by.
I'll take graphs thanks Eddie.

--
Elsie.


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G-S  
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 More options Oct 29, 10:34 pm
Newsgroups: aus.motorcycles
From: G-S <ge...@castbus.com.au>
Date: Thu, 29 Oct 2009 22:34:21 +1100
Local: Thurs, Oct 29 2009 10:34 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000

Why would you believe graphs over someones tested experience when it's
already been explained that graphs from different dyno's can't be
directly compared because dynos aren't calibrated?

G-S


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Nev..  
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 More options Oct 30, 9:23 pm
Newsgroups: aus.motorcycles
From: "Nev.." <id...@mindless.com>
Date: Fri, 30 Oct 2009 21:23:00 +1100
Subject: Re: TuneBoy? was Re: Bathurst 1000

probably because nothing is less reliable than the subjective opinion of
a person.  I offer aus

Nev..
'08 DL1000K8


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Nev..  
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 More options Oct 30, 9:24 pm
Newsgroups: aus.motorcycles
From: "Nev.." <id...@mindless.com>
Date: Fri, 30 Oct 2009 21:24:34 +1100
Local: Fri, Oct 30 2009 9:24 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000

sending before i've finished typing.

Nev..
'08 DL1000K8


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Lars Chance  
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 More options Oct 30, 10:07 pm
Newsgroups: aus.motorcycles
From: Lars Chance <lars.cha...@hotmail.com>
Date: Fri, 30 Oct 2009 11:07:11 GMT
Local: Fri, Oct 30 2009 10:07 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000
Nev.. wrote:

> probably because nothing is less reliable than the subjective opinion of
> a person.  (snip)

Without wishing to offend anyone whose ego might depend on their
newsgroup-credibility; opinions are like arseholes.  Often there's
nothing behind them but shit.
Phil Tainton or Jerry Burgess's opinion I might be convinced by; anyone
else and I'll do my own research thanks. (As I encourage you to do yours)

--
Elsie.


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G-S  
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 More options Oct 30, 10:18 pm
Newsgroups: aus.motorcycles
From: G-S <ge...@castbus.com.au>
Date: Fri, 30 Oct 2009 22:18:55 +1100
Local: Fri, Oct 30 2009 10:18 pm
Subject: Re: TuneBoy? was Re: Bathurst 1000

Nothing is less reliable than the subjective opinions of certain
persons,  I'm not one of those persons :)

G-S


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