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California Engine
https://slantsix.org/forum/viewtopic.php?t=50150		 Page 1 of 1
Author:  DartDude [ Mon Oct 22, 2012 6:05 am ]
Post subject:  California Engine
is ther any differance between a cali emissions 225 and a regular 225? mine has all the smog stuff on it (not hooked up) and I am going to pull all of it out
Author:  SlantSixDan [ Mon Oct 22, 2012 7:49 am ]
Post subject:  Re: California Engine
Quote:
is ther any differance between a cali emissions 225 and a regular 225?
The differences are in the equipment bolted onto the engine, not the engine itself.
Quote:
mine has all the smog stuff on it (not hooked up) and I am going to pull all of it out
Don't just indiscriminately rip out parts and systems just because you think they have something to do with emissions control. Some of the emissions hardware works for you, not against you, and removing it will make things worse, not better. See this post for a rundown on some of the emission control systems found on slant-6 cars, and their benefits and drawbacks.

The single best thing you can do to improve how your California '72 runs is to swap the intake manifold. California '72s had a very primitive, first-year kind of EGR (exhaust gas recirculation). There was no control valve, just a "floor jet" (i.e., hole) in the floor of the intake manifold, creating a passage between the exhaust and the intake so exhaust would flow -- all the time -- into the intake tract. Unless yours happens to be fully clogged with carbon, this is a real stinker; it destroys driveability, performance, and fuel economy. Any intake other than a California '72 will be fine; you can use a '71-down item with no EGR provisions at all, or you can use a '73-up item with valve-controlled EGR (and simply leave the valve disconnected from vacuum or install a blockoff plate if you don't want to run EGR).

It is very much worth your while to get the good gaskets for the manifolds-to-head and intake-to-exhaust junctions.

You may also want to consider swapping on a different/better carburetor eventually, and you'll be rid of the short/slow California distributor advance curves when you do the HEI upgrade.

Your California '72 also probably has a secondary air injection system (air pump, also called "smog pump", and associated tubes, hoses, brackets, belt drive, etc.) This doesn't really do any harm; it consumes almost no power, but it does take up space in the engine bay. You can remove the pump, bracket, belt, hoses, tubes, control valve and fittings. You'll have to have a blockoff plate for the tube flange at the rear of the cylinder head. That is part number 3751 249 from the dealer (and gasket part number 4275 834).

Other than that, I can't think of much hardware under the hood that I would advise removing.
Author:  DartDude [ Mon Oct 22, 2012 10:57 am ]
Post subject: 
The smog pump and hoses an the charcol can (which was unhokked any way) are all i have taken out so far
Author:  SlantSixDan [ Mon Oct 22, 2012 11:58 am ]
Post subject: 
You should not have removed the charcoal can.
Author:  DartDude [ Mon Oct 22, 2012 5:20 pm ]
Post subject: 
my mistake it wasn't the charcol can i took off it was this round thing that was bolted on the fender well it had nothing hooked to it
Author:  SlantSixDan [ Mon Oct 22, 2012 6:37 pm ]
Post subject: 
Sounds like your car has (or used to have) A/C. That thing you took off was the vacuum reservoir. Without it your heat/defog won't work, even if you aren't keeping the A/C.
Author:  patrickhenryhague [ Mon Oct 22, 2012 9:57 pm ]
Post subject:  Smog
Dan, Well Spoken.
Author:  DartDude [ Tue Oct 23, 2012 5:39 am ]
Post subject: 
it DID have A/C but none of it was hooked up when I got the car ....Plus the engine has a knock in so i may put a differnt engine in anyway.. I have a lead on a '69 225 out of a truck
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