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

[Antonio Nolasco]

Because of firing order improvements are not symetrical between cylinders, 
and in any case not significant (BTW I didn't try diff carburation between 
cyl).

Most noticeable advantage is ground clearance and weitgh savings. I fitted a 
Ducati Performance 2-1 some years ago and I am very satisfied. Mine is much 
more strisgthyforward than Spagetti and may have lower pressure loss.

Please feel free to contac me off-line if you want a picture
Best Regards/ Antonio
95' 900SS


----- Original Message ----- 
From: "Kevin Kachadourian" <kkachadourian at cv.k12.ca.us>
To: <ducati at ducati.net>
Sent: Wednesday, November 21, 2007 8:41 PM
Subject: [Ducati] 2 into 1 exhaust for 900SS? (Kevin going to dark side)


Okay, I took the SP up to Craig at Hanson Racing Technology. Amongst his 
recommendations (others in following posting), was to let him build a 2 into 
1 exhaust system for the bike. I did a little research, and didn't find much 
information about it. I did find a rant that said that there was no 
improvement in performance, and they had a couple of dyno test charts to 
support their argument (charts which I could not quite figure out).
I've got a 51mm Termignoni spaghetti system on the bike now, and thought 
that was the top. But, Craig said that I would have noticable midrange 
improvement with his 2 into 1 system. Craig was able to deliver everything 
he claimed when he built a 2 into 1 for the Alazzurra, but that was a 
slightly different situation (we were switching from the stock skinny pipes 
to Craig's system, not from fat Termis). What Craig claims, which is what I 
want, is better perfomance overall, and especially in the midrange (which is 
where I do most of my heavy throttling and accelerating).
It's hard to ignore Craig's advice. He did such a nice job of making the 
Alazzurra motor the sweetest running motor I've ever had, and plans on doing 
the same for the Duck (good rings, check cylinder barrels, set cam timing, 
port out heads, set squish bands,... I get all excited just thinking about 
it).

Does anyone have knowledge, information, or experience with 2 into 1 
(especially in comparison to Termi spaghetti)?

Kevin Kachadourian
'96 900SS SP
'85 650 Alazzurra
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