[Ducati] 2 into 1 exhaust for 900SS? (Kevin going to dark side

[J Hundertmark]

I've got a 95 900 SS with 944, high compression, 39 mm Keihns & the Nichols 
light (12 oz if I remember correctly).  On the track or power touring 
through the afar neighborhoods it was fine, although, it needed to be kept 
over 4000 RPM to avoid unpleasant snatching.

When I put on a set of BST wheels, the most noticeable change was the 
improvement in low RPM tractability (more noticeable than easier turn in). 
After doing a little bit of thinking, I realized that the improvement was 
due to the reduction in large flywheel (wheel) that is slightly out of phase 
with the engine (due to chain variation).  The BST wheel was an eight pound 
reduction (not to mention the decrease in inertia due to significantly 
reduced mass at wheel OD).  And I won't go into the smoother shifting & 
reduced tendency to lock the rear wheel during downshifting.

Bottom line - I recommend the lighter flywheel & would do it again.

Jack Hundertmark

----- Original Message ----- 
From: <D888SPOLTD at aol.com>
To: <ducati at ducati.net>
Sent: Thursday, November 22, 2007 11:31 AM
Subject: Re: [Ducati] 2 into 1 exhaust for 900SS? (Kevin going to dark side


>
> Knowing Guy's work Dave, I agree.  Seeing his heads on Alex's creation
> running amuck with much more larger hp machines at Grattan shows the merit 
> of the
> work.  And as you said going short stacks without head work doesn't garner 
> the
> return on investment.  I'm running 41mm's with high comps (11.5:1) on my 
> '95 SP
> and am quite pleased.  With hind sight I wish I'd been able to spring for 
> the
> 944 kit and I still want to lighten the flywheel.  In regards to that,
> someone here stated a loss of rideability doing this in the midrange?  And 
> that
> makes no sense to me.  I know several riders most noteably Arch who have 
> years,
> decades even, of expereince with such mods on their ss/sp machines and 
> report
> wonderful tractability throughout the range. I was waiting ti hear about 
> hte
> dreaded reduction in engine braking myth but maybe that's been quashed.
>
> As to your 2-1, I have an Arrow system with carbon can on my bike.  It is
> known to reduce peak hp by 2-3 but for what I was looking for I'm pleased. 
> I
> suspect ARC's system properly tuned to an individual bike with head work 
> and such
> could smooth out the curve a bit and eliminate some of that loss, but
> probably not all.  Maybe the loss of weight makes up for the few hp lost?
>
> Anyway, I'm very interested in the ARC setup but have a few questions. 
> What
> parts of the rear frame did you have to cut off to mount the system?  Any
> extra brackets to hold things in?  I assume they would be part of the 
> system but
> I'm curious.  If you have any pics or hp/torque curves to share please do.
>
> Thanks,
> W
>
>
>
>
> In a message dated 11/22/2007 10:24:55 AM Eastern Standard Time,
>