| |
| Muffler
Type |
Miles
Per Hour |
Engine
RPM |
Backpressure
|
| $50
Facsimile |
40
45
50
55 |
1500
1700
1900
2000 |
10
oz
32
oz
46
oz
54
oz |
| Early
Jobber
(no longer available) |
40
45
50
55 |
1500
1700
1900
2000 |
2
oz
4
oz
10
oz
16
oz |
| Non-Tapered
4" Diameter |
40
45
50
55 |
1500
1700
1900
2000 |
0
oz
6
oz
10
oz
16
oz |
| Aries
Reproduction
Tapered Muffler |
40
45
50
55 |
1500
1700
1900
2000 |
0
oz
6
oz
12
oz
12
oz |
The
road tests were performed by Doug Windrem of Ontario, Canada.
All tests were performed on a level road at an altitude
of 1,000 feet. The temperature was 75¼ F. on a clear sunny
day. The tests were actually performed using a 1928 Model
A Phaeton. An extra length of special piping was installed
between the exhaust manifold and the muffler to be tested
(see photo). It was here that the back pressure gauge was
attached. The mounting point of the tail pipe was also lowered
so a correct fit could be maintained without leakage. Two
people rode in the car, one driving and one taking readings
on both the "Snap On" brand tachometer and the pressure
gauge. The pressure gauge is manufactured by O. T. C. Division,
SPX Corporation, Owatonna, MN 55060, tool part #7215 and
is specifically designed for testing back pressure on automobiles.
The speedometer was also calibrated and tested over the
test speeds and found to be accurate within one mile per
hour.
Backpressure Gauge Test Setup
Contact
your local dealer or
Aries Limited, 14510 Big Basin Way, Suite 112, Saratoga,
CA 95070-6082
Email: Sales@amuffler.com
or call 650-948-6424
In Canada: contact Steve Latimer,
stocking dealer in Ontario,
at 613-498-1647 (evenings).
In New Zealand: contact Roger
Anderson, Model A & T Parts and Accesories
Meeanee, Napier, New Zealand, www.model-a-autoparts.co.nz
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