<VV> Correct CO setting for Turbo engine

Wed Apr 25 09:18:02 EDT 2012

Hello Steve,

we do not have this problem here classic cars do not have to be tested - everything is allowed ;-). I will go through the list as soon Grant sents my new carb and turbo. During installation I will for sure find the problem - now I have to leave for technical inspection on the 66 Corsa, last week same time I made it with my 63 Vert.
Thanks for your quick and helpful answer
Ulli

---------------------------

61 Monza 900 Sedan
63 Monza 900 Convertible
65 Monza 110 Coupe
66 Corsa Convertible
84 Porsche 911 Targa
86 Porsche 356 Speedster Kit Car
91 Porsche 964, C4
62 VW Split Window Bus
65 VW Split Window Bus

Am 25.04.2012 um 15:12 schrieb Steve Goodman:

> Hello Ulli (and Matt):  Do you have access to an exhaust analyzer?  If so you need to take a reading and see what the CO level is indicated.  The CO can also be 'rocked' back and forth by the HC (hydrocarbon) numbers.  Without knowing what numbers your engine is producing now it is difficult to know what to suggest as fixes.   Remember too that in 1966 the emission situation was just taking hold here and it is generally an accepted theory that a portion of the reason that GM discontinued the turbo option was their fear of struggling with the emission problems.  Making an A. I. R. system work with the turbo was undoubtedly a nightmare for the engineers in 1966.
>  
> I can give you what the Denver, Colorado area uses for numbers for 1960-1970 cars in general.  Any car within those years (gasoline powered) has to be under these numbers to pass the annual emissions test:
>  
> CO%------5.5%
> HCppc (parts per million)  1000ppm
>  
> The smaller the number CO number indicates means the leaner it is running.  TOO lean of course is a bad thing but remember that GM and CARTER both wanted the turbo engines to run rich in order to maintain a cooler condition inside the combustion chamber.  High CO can also be traced to vacuum leaks and on a turbo engine that gives you many possibilities to look at.  Start at the carb: the gasket stack between the carb bodies and the induction tube hose from the turbo to induction tube plus the connections from the induction tube to the heads.  Also very small things like a leaky reference hose to either the gauge or distributor.  I have found only a couple of times a leak in the compressor housing to bearing housing on the turbo too.
>  
> Don't be fooled by the induction tube hose, it can feel pretty good and look pretty good but the inside rubber covering can just be eroded away and all that is left is the fabric reinforcing plus the outer rubber covering. 
>  
> HC (hydrocarbons) are unburned fuel.  High numbers of HC many times indicate an engine miss such as a bad plug/plug wire/ignition parts/weak condensor/uneven compression due to faulty valves or rings. 
>  
> I hope the above helps, let me know if there are things above that I didn't state very well to you and I will try to explain in another manner. 
>  
> GOOD LUCK and yes Matt, I am happy to try and help if I am lucky enough to know the answers to the questions.
>  
> Best wishes, Steve
>  
>  
> 
> ----- Original Message -----
> From: Matt Nall
> To: info at california-camping.de ; rearengine.steve at att.net
> Sent: Wednesday, April 25, 2012 12:32 AM
> Subject: Re: <VV> Correct CO setting for Turbo engine
> 
> 
> Matt, in Germany the setting of the CO defines how rich the engine is running - fuel/air mixture - the measurement is at the exhaust pipe. Since my Turbo is not running the way I want it this might be one of the first thinks to check, I got rid of the knocking problem using a new distributor from underground, now I have to further through all possibilities.
> 
> Regards
> Ulli
> 
> ---------------------------
> ============================================
> 
> 
>  Ulli,  I'm copying this to Steve Goodman of Denver, Colo.   He is our resident expert on Corvairs and emission levels.  He owns and operates a Corvair  Repair facility.
> 
>   He is also a most helpful person!   Right Steve??
> 
> Matt Nall
> Charleston, Oregon
> http://tinyurl.com/The-Patio
> http://tinyurl.com/Matts-Tech-Pages
> 
> 
> 
> -----Original Message-----
> From: Ulli Dittmar <info at california-camping.de>
> To: Matt Nall <patiomatt at aol.com>
> Sent: Tue, Apr 24, 2012 11:21 pm
> Subject: Re: <VV> Correct CO setting for Turbo engine
> 
> Matt, in Germany the setting of the CO defines how rich the engine is running - fuel/air mixture - the measurement is at the exhaust pipe. Since my Turbo is not running the way I want it this might be one of the first thinks to check, I got rid of the knocking problem using a new distributor from underground, now I have to further through all possibilities.
> 
> Regards
> Ulli
> 
> ---------------------------
> 
> 61 Monza 900 Sedan
> 63 Monza 900 Convertible
> 65 Monza 110 Coupe
> 66 Corsa Convertible
> 84 Porsche 911 Targa
> 86 Porsche 356 Speedster Kit Car
> 91 Porsche 964, C4
> 62 VW Split Window Bus
> 65 VW Split Window Bus
> 
> Am 25.04.2012 um 07:59 schrieb Matt Nall:
> 
>> 
>> 
>> 
>> can someone please provide the correct setting for CO for the 180 hp Turbo 
>> engine?
>> 
>> Thanks in advance
>> Ulli
>> 
>> ===============================================
>> 
>> 
>> Ulli, are you asking about Carbon Monoxide  level  at the tailpipe of the car?
>> 
>> 
>> This is taken from an US EPA  publication
>> 
>> 
>> http://www.epa.gov/oms/consumer/12-miles.pdf 
>> 
>> 
>> 
>> 1970 Congress adopts the first major Clean Air Act, establishes the U.S.
>> Environmental Protection Agency (EPA), and gives the new Agency broad
>> responsibility for regulating motor vehicle pollution.  The clean air law
>> calls for 90 percent reductions in automotive emissions.  New cars must
>> meet a 0.41 gram per mile HC standard and a 3.4 grams per mile CO
>> standard by 1975; NOx emissions must be reduced to 0.4 gram per mile
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Matt Nall
>> Charleston, Oregon
>> http://tinyurl.com/The-Patio
>> http://tinyurl.com/Matts-Tech-Pages
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
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