OUT HEADER FIT AND EXHAUST GASKET PROBLEMS
A Borla Hot Rod Kit
"Hot Rod Kit" was purchased to provide an all stainless (304) straight
through muffler with 3 inch exhaust tubing (Borla price on their web site was
$915.99, but they only offer 2 1/2 inch system now!). This mates perfectly with the Sanderson Big Block Headers designed to
fit a 1934 Ford.
With the Pro Street 'tubbed" chassis there is no room to
have the exhaust go over the narrowed Ford 9 inch rear axle. Also the 15
gallon stainless gas tank left little extra room under the rear and even a 2 1/2
inch exhaust would have been too low. The only choice was a side exhaust.
With a 112 inch wheel base the exhaust exits to the rear of the doors.
That is a safety requirement.
The Bola kit comes with many pieces, far more than needed.
Bends were selected
and cut to provide the angles needed to mate with the headers. They were
then tack welded using the MIG welder (with the "Shielding
Gas Saver System") MIG
welding does a fine job for the tack welds. Hi Si 308 wire, 0.030 diameter
is used with a Trimix shielding gas (8% CO2, 2% O2,
balance Argon). The CO2 content is sufficiently low that carbon
pickup is not a problem. The slip joints from pipe to muffler and for the
exhaust tips were also welded with
MIG. However for a clean and neat appearance it is
tough to beat TIG welding for the butt joints. Especially if the TIG welding is done by a
A local welding shop
was employed to TIG weld the MIG tack welded
The finished results are excellent. Since the car is driven (it's not a trailer queen!)
the 304 stainless is not polished . The exhaust sounds great. It is fairly quite at idle and
even cruising at 60 mph sounds fine. When you open up the secondaries I'm
not sure if the exhaust or intake sounds the loudest! However it only
lasts for a few seconds since you'll be at 100 mph very quickly!
Only used a
portion of the 16 gauge 304 stainless tubing and bends supplied with
the Borla kit. In fact Borla no longer sells the 3 inch tubing kit or
some of the 3 inch tubing. We have: 1) two straight pieces, one 4 foot
and the other 5 foot long; 2) two 180 degree bends -36 inch total length
each; 3) two 45 degree bends- 25 inch total length each and 3) three HD
Stainless clamps. See photo left.
There is over $500 worth of
product. It is all new.
Using This Site:
We're "hitchhiking" on our commercial web site to bring you this information on
"Exhaust" for our Street Rod with
a 502/502 Big Block. If you or a friend have a MIG Welder (also called a Wire Welder, GMAW, etc)
visit our site on How To Save Shielding Gas Waste
(and also Save Money!). You can reduce the number
of times and the effort required to have you shielding gas cylinder filled in
Just click on the
Up Button on the left.
$ave money and get
better weld starts!
If you make a lot of short welds and
weld tacks you can probably reduce your gas usage by 50% or more. Also
fewer trips to have the cylinder filled.
Thanks to those "Car Crazy" folks who have purchased
the Gas Saver System and commented on the improved starts and reduced gas usage
they have achieved. Many purchased our 6 foot prefitted GSS,
Part Number WAT FB6 or you may want our 3 or
4 foot prefittted
Part Number FB3, FB4
Saver System Product
Visit These Other Sites
(just CLICK on the ITEM):
MIG Gas Delivery and the Small Block Chevy
Evolved in a Similar Way and Time!
had Advances and Setbacks Before
They Were Optimized!
for a PDF Report on the Similarities
Thermostat and Additive
Getting the Heat OUT
Most Important - - -
REFERENCES and BACKGROUND
Modifying an 850 Holley for a ZZ 502 Chevy Big
A Cool 1934 Pro Street Rod Web Site