Karl
I'll answer this more when I get home, so that I can share with the rest
of the digest- don't have it here at work anymore...
More than likely, it will work just fine. To exactly the same degree,
there isn't enough info about the catalyst to really say. The more
important driver in this equation will be catalyst age- new is better than
old, especially on an engine notorious for burning oil.
Eric Storhok
Powertrain System Development
Powertrain Research and Development
(313)33x75011
MD 35, FPC-B
Ford Motor Company
-----Original Message-----
From: Karl Robrock [mailto:robrock@domain.elided]
Sent: Tuesday, October 07, 2003 12:05 PM
To: body@domain.elided
Cc: alfa@domain.elided; Storhok, Eric (E.M.)
Subject: spider cat converter
The unit on my '91 is 16" long dual in dual out, and looks like about
1.75" inlets and 1.75" outlets. Summit Racing
(<http://www.summitracing.com>www.summitracing.com) carries a 2" dual
inlet and outlet for $115 and a 2" dual inlet with 2.5" outlet unit for
$97. They are part numbers CTO-8012 and CTO-9513 respectively, both are
17" long, but could probably be made to fit. The exhaust Y's into a
single pipe shortly after the cat on the spider, so this could be
bypassed completely welding one one bend after the cat. The pipe seems to
by 1" 7/8 after the Y (maybe a tad larger, but I am also measuring OD and
I can never remember if exhaust is measured OD or ID - I think ID)
Eric - the digest's emissions expert - would fitting a cat that is
clearly intended for larger throughput than this not work well? Would it
never get up to operating temperature? Would emissions end up being worse
(although performance may increase due to less restriction)?
It's going to be tough to find anything that is dual in dual out that
small, I assume.
Any suggestions?
Karl
'91 164L
'95 164LS
'94 164Q4
'91 Spider Veloce
<http://alfalover.dhs.org>http://alfalover.dhs.org
AROC Detroit Homepage: http://www-personal.umich.edu/~alfa/index.htm