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Too much vacuum 'stuff'
https://www.slantsix.org/forum/viewtopic.php?t=16288		 Page 1 of 1
Author:  Highway [ Wed Feb 22, 2006 1:52 pm ]
Post subject:  Too much vacuum 'stuff'
Ok, I don't like clutter and I have way too much vacuum junk under my hood. So I'm asking how much of this 'stuff' can I do without?

Do I need a vacuum 'canister, vacuum (EGR) amplifer, air pump, etc......?

I know this might be an idiotic question but like my friend always said "There are no stupid questions just stupid people."
Author:  440_Magnum [ Wed Feb 22, 2006 2:39 pm ]
Post subject: 
What year is your car?

Do you have to pass an emissions test?

Do you have to pass a visual "emission equipment in place" inspection?

What's your goal, just reducing "clutter?" More power? More efficiency? Reliability?

Before you just start pulling stuff off, you need a good understanding of what each system does, and what all ELSE has to change to realize any possible benefit from removing each system. Case in point- the air pump. If you pull it off, you'd *better* remove the catalyst too, because with out the air from the air pump it'll never have enough oxygen to completely catalyze all the HC and CO, so it will fill with carbon and plug up.

Its often better, especially for a daily driver, just to leave everything there and fix it so that its working as-designed. Case in point, a friend from my local car club recently acquired a low-mileage late-70s B-body (heavy car!) with a "Lean Burn" 318. With everything working right, the darn thing gets 20 mpg and drives great, yet most people look at a Lean Burn car and the first thing they want to do is ditch the computer and associated systems.
Author:  Highway [ Wed Feb 22, 2006 7:18 pm ]
Post subject: 
Thanks for the reply Magnum.

It's an:
85' Dodge D100
SL6 w/ A833OD

It does have the cataylst converter but the smog pump is not hooked up.
Where I'm from there are no car insections with the exception of an occasional check point which basically consists of nothing more then checking your paperwork and blinkers. I will be scraping the cataylst converter and any of the smog 'stuff' with it. In a nutshell, I would like to get it down to just a basic engine if that's possible.
Author:  GoodysGotaCuda [ Wed Feb 22, 2006 8:43 pm ]
Post subject: 
Sorry to hi-jack. But i was about to start the same thread, but only with my 74 Duster which i know doesnt have as much stuff.

I'd really just like to reduce clutter. I have to pass emissions, but my old 360 untuned Dart that i had passed..so i dont think a tuned slant will have an issue.

Charcoal Canister? What does the vacuum amplifier do for me? What can i get rid of, and how to i do it? Meaning if i took out the Charcoal canister, what would i need to plug up or vent?

http://img.photobucket.com/albums/v206/ ... /after.jpg

I've taken almost all of the clutter outta my 'Cuda. I just seem to prefer it that way i guess. What can i live without on my slant?


Pic of my Daily Driver motor :D
http://i29.photobucket.com/albums/c298/ ... 010007.jpg


Thanks! Once again, sorry for the hi-jack..just avoiding two threads on pretty much the same topic.
-Mike
Author:  Avenger2040 [ Wed Feb 22, 2006 9:32 pm ]
Post subject: 
Charcoal Canister, what is that?? and from wich years that was used, also, what exactly it does?
Author:  GoodysGotaCuda [ Wed Feb 22, 2006 10:53 pm ]
Post subject: 
Quote:
Charcoal Canister, what is that?? and from wich years that was used, also, what exactly it does?
The Charcoal Canister is to the left of the radiator overflow in my picutre. The heck if i know what it does :lol:lol My 72 B'Cuda had one as well
Author:  Charrlie_S [ Thu Feb 23, 2006 4:18 am ]
Post subject: 
Goody, would you please edit your picture to no more the 400 pixels wide? That way it is not necessary to scroll to read the thread.
Please read this: http://www.slantsix.org/forum/viewtopic.php?t=4434
Author:  Reed [ Thu Feb 23, 2006 7:54 am ]
Post subject: 
Quote:
Thanks for the reply Magnum.

It's an:
85' Dodge D100
SL6 w/ A833OD

It does have the cataylst converter but the smog pump is not hooked up.
Where I'm from there are no car insections with the exception of an occasional check point which basically consists of nothing more then checking your paperwork and blinkers. I will be scraping the cataylst converter and any of the smog 'stuff' with it. In a nutshell, I would like to get it down to just a basic engine if that's possible.
First off, you need to determine whether or not you have a lean burn or SPark Control COmputer system. These might have worked when new, but usually don't work anymore and cannot be repaired (I just went through this with my 86 Dodge b-150). My 86 van had the leanburn AND spark control computer and it was an absolute mess on top of the engine. By swapping to HEI ignition and a non-computerized carb and by disconnecting the EGR valve) my engine runs smoother, quieter, has more power and gets better gasmileage.

The only vacuum operated emissions device that is really worth disconnecting is the EGR valve. The EGR vacuum ampliication system makes up most of the underhood hose mess, and on mid 80s Mopar trucks the plastic hoses for the system are a regreat source of vacuum leaks.

You really should reconnect your AIR pump. It has no adverse effect on engine performance, and when used with the cataytic converter greatly reduces your truck's emissions. The problem is that if you have run the truck too long without the AIR pump hooked up our catalytic converter may have become clogged. I suggest you hook the AIR pump back up and run your truck like that for awhile and see if it impacts your mileage or performance any.
Author:  DusterIdiot [ Thu Feb 23, 2006 8:36 am ]
Post subject:  Lol
Quote:
The Charcoal Canister is to the left of the radiator overflow in my picutre. The heck if i know what it does

If you look it has a bowl overflow nipple incase the carb needle sticks, and another line goes to the gas tank...this eliminates the need for a vented gas cap, and returns any overflow to the tank (note the pre -1972 vehicles that have them and that nasty 'splotch' of gas and crap around the gas cap as the tank gets warm and purges out the sides of the cap)...


you can plug everything up and leave the cannister (so the tank can vent), it won't hurt anything, unless the cannister vent gets clogged/filter goes bad...

-D.Idiot
Author:  Highway [ Thu Feb 23, 2006 10:40 am ]
Post subject: 
Quote:
First off, you need to determine whether or not you have a lean burn or SPark Control COmputer system. These might have worked when new, but usually don't work anymore and cannot be repaired (I just went through this with my 86 Dodge b-150). My 86 van had the leanburn AND spark control computer and it was an absolute mess on top of the engine. By swapping to HEI ignition and a non-computerized carb and by disconnecting the EGR valve) my engine runs smoother, quieter, has more power and gets better gasmileage.
How do I determine if it's a SCCS and/or lean burn?
Quote:
The only vacuum operated emissions device that is really worth disconnecting is the EGR valve. The EGR vacuum ampliication system makes up most of the underhood hose mess, and on mid 80s Mopar trucks the plastic hoses for the system are a regreat source of vacuum leaks.
The egr valve is definitely something I would like to get rid of. It has multiple hoses and it is just a plain mess on top of the motor.

Also Reed, I am running a 1945 Holley.
Author:  mcnoople [ Thu Feb 23, 2006 10:48 am ]
Post subject: 
The egr valve itself is on the side of the intake. It only has 1 vac hose nipple and it can be left in place unhooked.
Author:  Highway [ Thu Feb 23, 2006 10:52 am ]
Post subject: 
Ok, I think I got a little confused, what I'm talking I believe is the EGR Amplifer. It's round, about 3 inches in diameter, has multiple hoses connected to it and is located on top of the engine.
Author:  Reed [ Thu Feb 23, 2006 12:59 pm ]
Post subject: 
Quote:
How do I determine if it's a SCCS and/or lean burn?
If your distributor has more than two wires coming out of it you have a computerized carb/ignition. Also look for a big black box hanging off your air cleaner or your firewall or hiding under your battery tray. Doues your cylinder head have a large number of sensors? Do you have two items in the #6 intake runner? Does your truck have an O2 sensor in the exhaust pipe otr manifold? All of these indicate a computerized carb or lean burn ignition.
Quote:
Also Reed, I am running a 1945 Holley.
My van had a Holley 6145 (the feedback version of the 1945). I am currently running a non-computerized Holley 1945 (to be replaced soon hopefully). The mid 80s was a real mixed bag for slant six carbs and ignitions and emissions systems. By 86 every slant six got some form of computerized igntion and carb, I think 85 was the last year you could get just a straight carb and no SCC/Lean Burn.

The Holley 1945/6145 carbs a pretty crappy. The throttle shafts wear and they can be a pain to work on. i recommend dumping it and going with a Holley 1920.
Author:  440_Magnum [ Thu Feb 23, 2006 3:56 pm ]
Post subject: 
EGR and amplifier: yes you can get rid of them (leave the EGR itself in place and just don't connect). The engine may be more prone to pinging in certain mid-throttle ranges, but not likely.

Charcoal canister: there's no good reason at all to get rid of it. It just recaptures evaporated gasoline from the fuel tank and carb float bowl and then allows the engine to burn off the recaptured vapors the next time you start the car. In addition to reducing emissions, it keeps your garage from stinking like gasoline.

Smog pump and catalyst- if you get rid of the smog pump, you GOTTA get rid of the catalyst or it will become a potato in the tailpipe.
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