Hi Steve. The Flowmaster mufflers are the #42451 50 Series 2 chamber,
which BTW are the quietest, next to the Delta 3 chamber. Summit sells them
for around $65, and the Delta's for about $20 more. The sound is a burble
at idle, and a respectable hot rod sound at full throttle. On the road at
touring, you can talk, and listen to the radio, as loud mufflers get old
real quick for us guy listening to the 40'S muzak elevator music.
The 3" electrical conduit, into an oval of 2 3/4" OD in the crossmember
holes allows for a full 2 1/4" exhausts pipe from headers to rear, with no
crimping. Too large an exhaust pipe, defeats the scavenger effect of the
exhaust system, and actually lowers hp and torque.
I talked to Flowmaster, and Bora for a long time before deciding on an
exhaust size.
BTW, exhaust does not rattle, and you could, if you wanted to, and I don't
know why, lift up the car by the exhaust tip. Jeff's Muffler did a great
job. He is about 35 years old, and proud of his work, like a true
craftsman. Nice to see, pride in your work is not dead.
Larry
Steve Laifman wrote:
> Mark,
>
> Have you read TigersUnited's latest Gauge article (Restoration Tips),
> and my latest post on cooling system mods. "So, How Hot Was It? The
> information is also in TigersUnited Tech Tips, cooling section. I'll
> send you another copy if it's been misplaced.
>
> BTW, the Flowmaster "30" series are three chamber designs, not two.
> They are 5 in thick x 10 " long, with minimum 2 1/2 tubing. Can be
> attached to 2 inch with adapters. 2 1/4 tube is the largest size that
> will fit through the stock frame tube, even squeezed, but they will bang
> the frame on maneuvers unless you enlarge the frame tube like Larry did
> in his TigersUnited Performance Tips Article. His are 2 1/2 inch tubes.
>
> The louder "50" series come in a 2" inlet size, and are 4 in. thick by
> 9.75 wide 3 chamber.
>
> The loudest "40" series are the 2 chamber design, also 4 in thick by
> 9.75 wide, and available down to 2 inch inlets.
>
> Funny thing is the ones available with 2" inlet/outlets are more
> expensive than the other sizes, even though the interior designs for
> each series are identical, according to Flowmaster.
>
> An "H" pipe will not only scavenge better, but smoothes out the sound
> and adds a bit more quieting. Using Larry's flanged "H" pipe design
> allows for engine, tranny work without yanking the exhaust system.
>
> Another EXHAUSTING tip: The short stock Tiger's front rubber
> connectors, between welded pipe strap and chassis eye, are subjected to
> extreme loads on engine torque rocking. They do not last very long. The
> same design, with shorter wrapped straps on the tube to lower the
> connecting hole, and allow extending it to meet the floorboard eye with
> four standard muffler shop steel-rubber-steel universal strap will allow
> a lot of engine rocking on the mount without destroying the expensive
> Rootes front rubber (which can just be left off.) The rear stock set-up
> is OK, as the tips don't move very much (except on that speed bump ;-)
>
> STEVE LAIFMAN
> --
> Steve Laifman < Find out what is most >
> B9472289 < important in your life >
> < and don't let it get away!>
> <SLaifman@SoCal.RR.com>
> <http://www.TigersUnited.com/gallery/SteveLaifman.asp>
>
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