Leaving aside the proliferation of citations you'll most likely get for
you are gonna loose power.
If you set up the car to run correctly with the open exhaust, it will be
choked to death with the silencers in place. Or vice versa, if it;s tuned
for a silenced exhaust, you'll probalby find that the engine run's out of
breath with an open exhaust.
With out getting into the ethics of open exhausts, let me make a
With a properly set up exhaust, ( well designed headers, properly sized
pipes and an effecient, high flowing silencer - muffler to us 'mericans)
you can achieve the low back pressure of the open exhaust and still be
legal, even if just barely.
There is another point.
I don't know about your local ordinances/laws, but here in SC, having a
"cut-out" on a car that is operable from the cockpit is specifically
outlawed. The fine is up to $1000 per cut out. Plus, the court usually
requires the device be removed permenantly, and you have to show the bill
where you had it done ( no fair doing it yourself)
On Mon, 19 Jan 1998 07:03:41 +0000 "Scott Gardner"
>All this talk about exhaust systems and matching the carbs to the
>exhaust have gotten me thinking. Has anyone here run their MGB
>without a muffler? I'm thinking of putting one of those
>cable-operated Y-gates just before the muffler, connected to a piece
>of pipe running straight out the back of the car, next to the
>existing tailpipe. It would only be used on the highway, of course.
>A friend of mine back at Nuke school had a similar setup on a '96
>Z-28, and it sounded beautiful, and the car performed noticeably
>better. Actually, his was a bit more trick. The Y-valve was
>operated by exhaust pressure. At idle, everything went through the
>catalytic converter and muffler, so he could pass emissions tests.
>When he jumped on the gas, the increase in pressure would activate
>the valve, and everything would bypass the cat and muffler, but still
>come out the same tailpipe. Illegal as heck, I know, but that's one
>of the benefits of military life. I haven't had a car inspected in
>almost five years!