The exhaust I built for my '77 starts with a 4 into 1 header, turns into a 2"
exhaust pipe that runs straight down the center of the car in the drive shaft
tunnel, follows the stock pathway under the rear axles and makes a sharp turn
into a generic free flow muffler that sits cross-wise under the boot (tucked
up nice and tight). It exits out of the muffler and makes another sharp turn
and exits out the right rear, with a crome down turn. No soot on the bumper,
no fumes in the car and it has a throaty kind of growl that belies the 1.5
liter engine under the bonnet. Although it doesn't look as pretty as the dual
upturned pipes of the Monza the Spit had when I bought it, I'll take the 2"
pipes over the 1 1/4" Monza anyday!
Thanks,
Paul Mostrom
'77' Spitfire 1500
'Black holes, where God divided by zero......'
-----Original Message-----
From: Chip Mautz [mailto:clmautz@yahoo.com]
Sent: Monday, November 23, 1998 8:41 AM
To: Andrew Mace; Spitfire List
Subject: RE: Weber Tuning
---Andrew Mace <amace@unix2.nysed.gov> wrote:
>
> Agreed. But that's not the point I was trying to make when I said
>
> > > it has almost nothing to do with the running of the engine but
almost
> > > everything to do with where the pipes terminate at the back of
the car and
> > > the airflow in that area....
More fuel for the fire. My '71 needs engine work bad, and blows LOTS
of stuff out the rear. People have thought I'd blown the engine while
pulling up sometimes, but I digress...
My car has a custom dual exhaust system, straight out the rear, and
then bent upwards, with twin chrome tips, a'la an E-type Jag. When I
drive it, the exhaust comes back up on the back of the car, bumper,
and even into the passenger compartment, lid up OR down. It doesn't
matter.
Due to the blazing high speeds that I drive the Spit, I'm thoroughly
convinced that due to the airflow over the rear of the car, any
exhaust turned upward will deposit soot on the rear. Top up, windows
down, it practically funnels the exhaust around each side and into the
open window, perfectly! You couldn't plan for better delivery...
After I get the engine in order, I'm hacking off the exhaust, and
removing the manifold. Then, a nice header, into a pipe, into my
flowmaster, and out the center.
I may even copy a design I saw this summer at our British Car Day car
show at Chateau Elan - run a huge pipe straight down the center from
the muffler, and turn it downward toward the ground. The car's pipe I
saw terminated well UNDER the end of the car, but the downturn kept
the exhaust at ground level, and didn't dirty up the back end at bit.
Quite impressive - you couldn't even see the pipe unless you got down
and looked under.
But, until I get her fixed, she comes in handy, as a smoke screen to
hamper the police on those high-speed chases down the freeway... ;-)
Woah - gotta wake up! Was I dreaming again??
Chip
|