Previous Thread
Next Thread
Print Thread
Bypass emissions system in a 73 duster slant 6 #950405
03/13/11 11:50 PM
03/13/11 11:50 PM
Joined: Nov 2010
Posts: 38
Dallas, Oregon USA
F
firtdog Offline OP
member
firtdog  Offline OP
member
F

Joined: Nov 2010
Posts: 38
Dallas, Oregon USA
Has anyone bypassed the emissions system in a 73 Duster? How do you do it? What hose matter? Which ones don't? Pics would be great.

Re: Bypass emissions system in a 73 duster slant 6 [Re: firtdog] #950406
03/13/11 11:57 PM
03/13/11 11:57 PM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert Offline
Circle Track
Happy Birthday RapidRobert  Offline
Circle Track

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
'73 was one of the worst if not the worst year ever for emission controls. Dont remem all that they had but for starters I'd run ported vac directly to the dist then rework all of the dist subsystems in order; initial/total/springs/vac adv and carter AFB or edelbrock pri jets from a strip kit will interchange/fit on carter 2bbls so you can jet up (pick a strip kit w dia's close to what you have in your current '73 carb). They tended to have retarded cam/tim sets also


live every 24 hour block of time like it's your last day on earth
Re: Bypass emissions system in a 73 duster slant 6 [Re: RapidRobert] #950407
03/14/11 01:36 AM
03/14/11 01:36 AM
Joined: Apr 2007
Posts: 4,233
petaluma,ca. u.s.a.
west Offline
master
west  Offline
master

Joined: Apr 2007
Posts: 4,233
petaluma,ca. u.s.a.
got a v-8? no smog
get an eddy manifold and holly carb and dump all the other garbage

Re: Bypass emissions system in a 73 duster slant 6 [Re: west] #950408
03/14/11 02:55 AM
03/14/11 02:55 AM
Joined: Oct 2010
Posts: 606
Montana
Y
Yancy Derringer Offline
mopar
Yancy Derringer  Offline
mopar
Y

Joined: Oct 2010
Posts: 606
Montana
The question is CAN you? I see you evidently live in Oregon, do you not have smog checks for registration, or is it exempt?

The biggest problem is

The stock distributor advance curve is screwed up

(I don't remember it MAY have thermostatic control in the vacuum advance)

The stock carb is way too lean

and EGR

The fuel tank/ carbon canister stuff generally doesn't hurt a thing.

I'd unhook the EGR, or plug the valve, richen up the carb, and play with the spark advance and look for a control valve in the vacuum line between distributor and carb.

I don't remember the details on these. Single BIGest problem is the carbs were way too lean

Re: Bypass emissions system in a 73 duster slant 6 [Re: Yancy Derringer] #950409
03/14/11 03:10 AM
03/14/11 03:10 AM
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog Offline
Striving for excellence
Kern Dog  Offline
Striving for excellence

Joined: Feb 2010
Posts: 18,493
Granite Bay CA
In California, the 1975 and OLDER cars are exempt from testing, but are still required by law to retain the factory emissions equipment. Nobody checks, so most people think its a moot point.

Re: Bypass emissions system in a 73 duster slant 6 [Re: Kern Dog] #950410
03/14/11 08:42 AM
03/14/11 08:42 AM
Joined: Mar 2007
Posts: 3,275
West Coast, USA
jbc426 Offline
master
jbc426  Offline
master

Joined: Mar 2007
Posts: 3,275
West Coast, USA
Quote:

In California, the 1975 and OLDER cars are exempt from testing, but are still required by law to retain the factory emissions equipment. Nobody checks, so most people think its a moot point.




...for now. The tree huggers are working to change that as we speak.


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: Bypass emissions system in a 73 duster slant 6 [Re: jbc426] #950411
03/14/11 02:32 PM
03/14/11 02:32 PM
Joined: Dec 2006
Posts: 377
Riverside, California
G
ghostrider Offline
enthusiast
ghostrider  Offline
enthusiast
G

Joined: Dec 2006
Posts: 377
Riverside, California
Quote:

Quote:

In California, the 1975 and OLDER cars are exempt from testing, but are still required by law to retain the factory emissions equipment. Nobody checks, so most people think its a moot point.




...for now. The tree huggers are working to change that as we speak.




Federal law requires all factory smog equipment to be on the car and functioning but they leave it to the states to enforce.
Tree huggers in CA need to be forced to live with NO post 1800 conveniences or pay the state a huge fee to submit their 'lawsuits for the environment' to the courts. They misrepresent their true objectives to the public (in my opinion) in order to get members paying dues.


Must remember... my humor doesn't work on forums.....my humor doesn't work on forums. Former Mopars include 69 Super Bee, 71 Sebring, 68 Charger, 69 Charger, 78 D150, 67 300, 71 Road Runner clone, 79 T-top Doba, 67 Barracuda, 91 TC by Maserati, 68 Town & Country






Powered by UBB.threads™ PHP Forum Software 7.7.1