Bus 1972-74 muffler choice.
-
- I'm New!
- Status: Offline
Bus 1972-74 muffler choice.
In regards to engine health, primarily cylinder head temperatures, does anyone have an opinion about the aftermarket header pipe style into a muffler as compared to the stock factory muffler? I actually own two factory mufflers for this engine, a bus type with the short exhaust pipe that bolts to the right end of the muffler with 3 bolts and a 412 muffler that has the exit at an angle mid way down the muffler that a tailpipe/ dampener bolts too. My bus has the 72-74 heater boxes.
-
- Old School!
- Location: Seattle, WA./HB. Ca./Shizuoka, Japan
- Status: Offline
Re: Bus 1972-74 muffler choice.
This a stock engine?
1972 Westy tintop
2056cc T-4 - 7.8:1 CR
Weber 40mm Duals - 47.5idles, 125mains, F11 tubes, 190 Air corr., 28mm Vents
96mm AA Biral P/C's w/Hastings rings
42x36mm Heads (AMC- Headflow Masters) w/Porsche swivel adjusters
71mm Stroke
Web Cam 73 w/matched Web lifters
S&S 4-1 exhaust w/Walker 17862 quiet-pack
Pertronix SVDA w/Pertronix module & Flamethrower 40K coil (7* initial 28* total @3200+)
NGK BP6ET plugs
002 3 rib trans
Hankook 185R14's
2056cc T-4 - 7.8:1 CR
Weber 40mm Duals - 47.5idles, 125mains, F11 tubes, 190 Air corr., 28mm Vents
96mm AA Biral P/C's w/Hastings rings
42x36mm Heads (AMC- Headflow Masters) w/Porsche swivel adjusters
71mm Stroke
Web Cam 73 w/matched Web lifters
S&S 4-1 exhaust w/Walker 17862 quiet-pack
Pertronix SVDA w/Pertronix module & Flamethrower 40K coil (7* initial 28* total @3200+)
NGK BP6ET plugs
002 3 rib trans
Hankook 185R14's
- satchmo
- Old School!
- Location: Crosby, MN
- Status: Offline
Re: Bus 1972-74 muffler choice.
Give your engine a stock muffler to go with stock heater boxes/exhaust headers, and be happy.
Satchmo
Satchmo
By three methods we may learn wisdom:
First, by reflection, which is noblest;
second, by immitation, which is easiest;
and third, by experience, which is bitterest. -Confucius
First, by reflection, which is noblest;
second, by immitation, which is easiest;
and third, by experience, which is bitterest. -Confucius
-
- I'm New!
- Status: Offline
- Amskeptic
- IAC "Help Desk"
- Status: Offline
Re: Bus 1972-74 muffler choice.
VWMAN wrote: ↑Fri Jan 18, 2019 7:22 pmIn regards to engine health, primarily cylinder head temperatures, does anyone have an opinion about the aftermarket header pipe style into a muffler as compared to the stock factory muffler? I actually own two factory mufflers for this engine, a bus type with the short exhaust pipe that bolts to the right end of the muffler with 3 bolts and a 412 muffler that has the exit at an angle mid way down the muffler that a tailpipe/ dampener bolts too. My bus has the 72-74 heater boxes.
If you have a 2.0, use the muffler with the right exit exhaust pipe. A little minutiae, the '72-'74 heater boxes and mufflers were actually divided up between:
a) smaller diameter 1700 heater boxes that worked with the left-exit damper equipped mufflers to Aug '73
b) slightly bigger 1800 heater boxes used with the right exit exhaust pipe muffler introduced with the 1974 1800 engine
Sell the damper-equipped muffler (found on all 1700 '72-'73 buses as well as the earlier 1700 411s) to a purist somewhere.
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
- asiab3
- IAC Addict!
- Location: San Diego, CA
- Contact:
- Status: Offline
Re: Bus 1972-74 muffler choice.
Was "a)" closer the the Type 4 car setup that leave the muffler at an angle into a matching damper pipe?
Do you know if there are observable traits that allow humans to tell the different boxes apart?
Robbie
Do you know if there are observable traits that allow humans to tell the different boxes apart?
Robbie
1969 bus, "Buddy."
145k miles with me.
322k miles on Earth.
145k miles with me.
322k miles on Earth.
- Amskeptic
- IAC "Help Desk"
- Status: Offline
Re: Bus 1972-74 muffler choice.
I'll answer your first question after you make it readable . . .
Yes to the observable traits . . .
Colin
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
. oh alright
a) identical mufflers/dampers/*tailpipes between the 411 and the '72-'73 bus
* there might be a brochure "photoshop miss that deletes the left exit on the 411 wagons
* there might be a different tailpipe end on the 411s
b) early has smaller diameter pipes and thicker flange walls at the copper sealing rings (preferable!)
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
- airkooledchris
- IAC Addict!
- Location: Eureka, California
- Contact:
- Status: Offline
Re: Bus 1972-74 muffler choice.
When Jake did his muffler project, and eventually decided against offering anything themselves, they found the collector style mufflers to be the best when it came to HP and CHT's. Only some extremely expensive variations of the Tangerine racing system were found to have any improvements over it.
just FYI. I knew all that and still ended up picking the stainless one from Vintage Speed because it was pretty and I didn't want to have to replace it again in a few years time. Those EMPI stainless steel extractor/muffler setups are probably the way id go if I were going to do it again today. They don't 'look' right, but they work really well. The non-stainless versions will fail within a few years (the muffler part anyway, the collector part will be fine.)
just FYI. I knew all that and still ended up picking the stainless one from Vintage Speed because it was pretty and I didn't want to have to replace it again in a few years time. Those EMPI stainless steel extractor/muffler setups are probably the way id go if I were going to do it again today. They don't 'look' right, but they work really well. The non-stainless versions will fail within a few years (the muffler part anyway, the collector part will be fine.)
1979 California Transporter
- Amskeptic
- IAC "Help Desk"
- Status: Offline
Re: Bus 1972-74 muffler choice.
Fotos or you're phake news.airkooledchris wrote: ↑Mon Feb 04, 2019 8:25 pmI ended up picking the stainless one from Vintage Speed because it was pretty
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles