No surprise there--I'd probably run at least a screen unless the carb
air intake area was boxed. One of the fabrication things I want to do is
to separate the intake air from the general engine compartment. If I can
get around to that I probably won't run filters. Though after the way
Peyote ran last weekend I'm inclined to leave it alone.
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On
Behalf Of Brad Kahler
Sent: Thursday, September 07, 2006 5:04 AM
To: fot
Subject: Re: [FOT] Air filter ("socks"?) for carb air horns?
Scott,
We didn't used to run one on Susan's spitfire until we ran VIR a few
years ago. VIR has pea gravel all over the paddock. What was happenign
with Susan's car was she would start it up and head out onto the track
and then she would come back in because the engine was revving up even
when the throttle wasn't depressed. Finally after several days of
tinkering with everything that we could think of, as she headed out of
the paddock she stopped real quick because the problem occurred not 20
feet from where we paddocked. Thanks to the sharp eyes of Bob Kramer he
noticed a small rock holding open the piston on the rear carb. That was
making it run lean and rev up rather rapidly.
What was happening is the pea gravel was imbedding itself in the soft
tires and as she would accelerate the gravel would bounce around under
the bonnet and eventually get sucked into the carb. Needless to say she
didn't go out onto the track again until we found the airhorn socks at
Victory cycle. Once those were installed on the car the revving problem
went away.
Whoever thought of putting pea gravel down in a paddock area should be
drawn and quartered. Its hard to imagine just how many small rocks got
sucked into the engine before we found the problem. Fortunately when I
pulled the head this past winter I found no internal damage.
Brad
(Suz's crew chief)
On 5 Sep 2006 at 21:12, Scott Janzen wrote:
> My GT6, running twin SUs, has this very nice pair of aluminum air
> horns/stacks. I've been running them open, but am concerned about the
> amount of grit in a typical track environment. They end about 1" off
> the inside fender, so there is no room for an air box or traditional
> filters. Anyone aware of a product (foam/fabric) designed to fit over
> these, or should I just run cheesecloth with a ziptie? ----- Original
> Message ----- From: "William G Rosenbach" <wgrosenbach@juno.com> To:
> <rjl@gt-classics.com> Cc: <fot@autox.team.net> Sent: Tuesday,
> September 05, 2006 7:51 PM Subject: Re: [FOT] A soggy Limerock Vintage
> Race day
|