Home » Public Forums » GMCnet » California smogged coaches (Removal of smog equipment)
Re: [GMCnet] California smogged coaches [message #271054 is a reply to message #271049] |
Mon, 02 February 2015 15:41 |
James Hupy
Messages: 6806 Registered: May 2010
Karma:
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Senior Member |
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There is no smog stuff with the possible exception of spark retard or lean
carb jets that will affect performance. The EGR valve mixes exhaust gasses
into the incoming fuel air mix and slows down the rate of combustion. Kinda
like a higher octane fuel might do. If you remove it, the engine will
probably have to have the spark advance retarded to keep it from pinging
when the engine is fully warmed up. There is no power robbing things like a
smog pump that is engine driven. The double charcoal canister system on the
California coaches just recycle gasoline vapors from the fuel tank and carb
float bowl back into the intake tract. Better to burn them there where it
might possibly make a tiny bit more horsepower than to vent them to the
atmosphere where we have to breathe them and have them help create smog.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Feb 2, 2015 at 1:24 PM, Robert Mueller
wrote:
> Scott,
>
> I am of the opinion that if you removed all the California emissions
> control "stuff" you wouldn't feel any seat of the pants
> improvement, you might see it on a dyno.
>
> Johnny,
>
> Also there are specific part numbers for California carbs.
>
> http://gmcmotorhome.info/engine.html#carb
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
>
> -----Original Message-----
> From: Johnny Bridges
>
> I >think< about the only difference on my '76, which was a CA coach
> originally, a second vapor cannister in series with the first
> one, and a thermo switch on the distributor vacuum plus a slightly
> different carb - it lists under a different number. I can't tell
> any difference in how it drives or the mileage from the 49 ones. After
> 76, there may be nore difference. Any of the gurus know of
> anything else different on a '76?
>
> --johnny
>
>
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California smogged coaches
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Re: [GMCnet] California smogged coaches
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Re: California smogged coaches
By: roy1 on Mon, 02 February 2015 11:20
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Re: California smogged coaches
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Re: California smogged coaches
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Re: [GMCnet] California smogged coaches
By: USAussie on Mon, 02 February 2015 15:24
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Re: [GMCnet] California smogged coaches
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Re: [GMCnet] California smogged coaches
By: Neil on Mon, 02 February 2015 16:17
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Re: [GMCnet] California smogged coaches
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Re: [GMCnet] California smogged coaches
By: rickmike on Tue, 03 February 2015 19:21
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Re: [GMCnet] California smogged coaches
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Re: [GMCnet] California smogged coaches
By: rickmike on Wed, 04 February 2015 18:56
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Re: California smogged coaches
By: bwevers on Mon, 02 February 2015 15:32
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Re: California smogged coaches
By: bwevers on Mon, 02 February 2015 16:27
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Re: California smogged coaches
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Re: California smogged coaches
By: bwevers on Mon, 02 February 2015 19:48
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Re: California smogged coaches
By: Neil on Tue, 03 February 2015 10:51
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Re: California smogged coaches
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Re: California smogged coaches
By: bwevers on Wed, 04 February 2015 12:19
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Re: [GMCnet] California smogged coaches
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Re: California smogged coaches
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Re: [GMCnet] California smogged coaches
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Re: California smogged coaches
By: Steve on Wed, 04 February 2015 20:24
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Re: California smogged coaches
By: JohnL455 on Thu, 05 February 2015 09:02
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Re: California smogged coaches
By: midlf on Thu, 05 February 2015 13:58
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Re: California smogged coaches
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