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| Revision as of 04:52, 18 May 2008 Ddgonzal (Talk | contribs) (->Part Numbers) <- Previous diff |
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| <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=3771 http://datsun1200.com/modules/myalbum/photos/thumbs/3771.jpg] | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=3771 http://datsun1200.com/modules/myalbum/photos/thumbs/3771.jpg] | ||
| * 20010-H1000 TUBE ASS'Y-exhaust, front - ALL (exc. GX, Automatic) | * 20010-H1000 TUBE ASS'Y-exhaust, front - ALL (exc. GX, Automatic) | ||
| + | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=19077 http://datsun1200.com/modules/myalbum/photos/thumbs/19077.jpg] | ||
| * 20010-H1020 TUBE ASS'Y-exhaust, front - Automatic | * 20010-H1020 TUBE ASS'Y-exhaust, front - Automatic | ||
| * 20010-H2301 TUBE ASS'Y-exhaust, front - GX 4-speed | * 20010-H2301 TUBE ASS'Y-exhaust, front - GX 4-speed | ||
Revision as of 22:28, 8 March 2009
The Datsun 1200 used a 1-1/2 inch exhaust system. The cast iron exhaust manifold has a flat two-bolt flange. A donut-type asbestos seal was used to connects to the exhaust pipe, which extended past the rear axle. Finally a very, very quiet muffler with a short tail pipe was suspended by two rubber rings.
muffler with integrated pipe
Bottom (old) is the factory piece
A12GX Engine (twin carb) models used a quieter exhaust with a small resonator as well the regular muffler:
Notice it also used a cast header with dual outlets.
Contents |
Sizing for Performance
A large diameter exhaust pipe is needed for maximum high-rpm horsepower. However, a small diameter pipe is needed for low-rpm horsepower. So you can see that a properly sized pipe -- not too big or too small -- is advantageous.
Single Exhaust
- Stock 68/69 horsepower A12: 1-1/2"
- lightly modded A-series engine: 1-3/4"
- 100 hp engine: 2"
- 150 hp engine: 2-1/4"
- 200 hp engine: 2-1/2"
Of course you can vary this. For example:
- The larger the engine relative to your car, you can get away with a larger pipe. Although the larger pipe cuts down on low-rpm horsepower you have a big engine so it's not so bad. This increases high-rpm (peak) horsepower
- For better street driveability, go a size smaller
- For drag racing where it is flat-out full throttle, a larger size may work fine
2.5 inch
Options
- Muffler system with resonator
- Chrome tailpipe extension (bell-shaped)
-
Coupe vs. Sedan
coupe muffler
- The bends are slightly different.
- The hanger near the end of the tailpipe (in the photo: where the price tag is) is a different place for sedan vs coupe
Part Numbers
Muffler measurements from my car (original muffler?):
- 11-5/8" Shell length
- 8-1/4" Shell oval width
- 3-3/4" Shell oval height
- 1.5" front inlet, centered
- 1.5" rear outlet, on far left of oval
A muffler about 2" longer may fit.
Nissan JDM Catalog
- 20010-H1000 TUBE ASS'Y-exhaust, front - ALL (exc. GX, Automatic)
-
- 20010-H1020 TUBE ASS'Y-exhaust, front - Automatic
- 20010-H2301 TUBE ASS'Y-exhaust, front - GX 4-speed
- 20010-H3400 TUBE ASS'Y-exhaust, front - GXA (GX Automatic)
- 20010-H7200 TUBE ASS'Y-exhaust, front - GX-5
- 20603-H2300 GASKET-exhaust tube - GX and GX-5
- 20602-27700 NUT-fixing, tube end (2) - ALL (except GX, GX-5)
- 20602-27700 NUT-fixing, tube end - GX-5
- 08915-13810 WASTHER-spring lock (3) - GX-5
- 20635-18000 STOPPER-muffler bound - ALL
- 20100-H1000 MUFFLER ASS'Y-with rear tube - Sedan
- 20100-H1400 MUFFLER ASS'Y-with rear tube - Van
- 20100-H2500 MUFFLER ASS'Y-with rear tube - Coupe
- 20630-18000 RING-rubber, muffler clamp (2)
- 20620-H1000 CLIP-tube, exhaust
- 06915-43810 WASHER-plain (2)
- 08915-13810 WASHER-lock
- 08110-85510 or 08110-86010 BOLT
- 08911-10810 NUT
- 20640-18000 STRAP-exhaust hanger
- 20641-18000 WASHER-plain (2)
- 08911-10810 NUT (2)
- 08915-13810 WASHER-lock (2)
- 08110-82210 BOLT (2)
- 20321-H2500 FINISHER-exhaust - GL, GX
- 20720-N2225 SEALER KIT-exhaust tube joint - ALL
USA Catalog
- 20010-H3100 ASSY-TUBE EXHAUST FRONT Sedan Manual Trans (formerly 20010-H1000) $34.92
- 20100-H7001 ASSY-MUFFLER WITH REAR TUBE Sedan Manual Trans (formerly 20100-H1000) $84.72 NLA (but is in 2007 catalog)
- 20321-H2000 FINISHER-EXHAUST (chrome extension) NLA
- 20321-H2500 FINISHER-EXHAUST (chrome extension) $18.36 NLA (but is in 2007 catalog)
Aftermarket 1.5
- Dynomax 17700 ("Thrush turbo"),similar shape to stock. Oval 3.25 in. x 7.75 in. Case Length: 11 in. Overall length: 16 in. Width: 7.750 in. Thickness: 3.25 in.
1-1/2 pipe clamps:
- Merit M112 or U112
- Napa BK 7335325
Rubber Donut Hangers
- Merit 8166 ???
Aftermarket GX (is it the same as the S110 gasket?)
- Gasket: Merit 8696
- Pipe: (1981 Nissan 720), Merit 48316
Exhaust Tip - 1-1/2" diameter
- Merit 9821
Aftermarket 1.75
- Walker Super Turbo WLK-17771
- WALKER Pro-Fit Muffler, 1.75" offset/center, #17881
- Dynomax 17771
- Magnaflow 11123 with offset Might be too long, it is 14" body, but it is Stainless Steel, best buy
- Borla XR-1 BOR-40483 Stainless Steel, 1.75 in, 2.25 out