Posted By: firtdog
Bypass emissions system in a 73 duster slant 6 - 03/14/11 03:50 AM
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.
Posted By: RapidRobert
Re: Bypass emissions system in a 73 duster slant 6 - 03/14/11 03:57 AM
'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
Posted By: west
Re: Bypass emissions system in a 73 duster slant 6 - 03/14/11 05:36 AM
got a v-8? no smog
get an eddy manifold and holly carb and dump all the other garbage
Posted By: Yancy Derringer
Re: Bypass emissions system in a 73 duster slant 6 - 03/14/11 06:55 AM
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
Posted By: Kern Dog
Re: Bypass emissions system in a 73 duster slant 6 - 03/14/11 07:10 AM
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.