[Healeys] Carb Adjustment Epiphany

[Oudesluys]

I have always used the good old Colortunes to set the mixture of SU's of 
my Spitfire in the past, fast, easy and rather accurate. CO around 3-5%. 
Even use them now on twin Dellorto's, they never fail me. Start with the 
jet orifice level with the carbs surface, if you are starting from scratch.

You have to balance the SU's first. The easiest is starting of with a 
length of tube to listen to the hiss of each carb at idle and adjust 
untill that is equal for all carbs, then set the mixture and then you 
may need very slight fidling the balance screws untill the engine is 
smoothest in pick up.
A Morgan Carbtune is of limited or no use with a balance pipe.

Kees Oudesluijs
NL

Ray Carbone schreef:
> Hi Dave,
> According to the articles referenced, the procedure is consistent with 
> previous understandings in all but which carb to mixture adjust.  All 
> procedures, including carb synchronization, are followed in the same 
> order as previously understood.  In the directions even the evaluation 
> of rich/lean are consistent with previous understandings (if the RPMs 
> raise and continue to run at increased speed after the back carb pin 
> is raised, the front carb is evaluated as running too rich, etc).  
> Again, same speed evaluations are made except that the opposite carb 
> is adjusted.  I suspect that this approach would depend on the 
> cross-flow within the manifold.  I have tried this approach and it 
> seems to work on my BJ8, however, without an exhaust analyzer it is 
> hard to tell.
> All the best,
> Ray Carbone
>
> ----- Original Message ----- From: "Dave Porter" 
> <frogeye at porterscustom.com>
> To: "'Dave Porter'" <frogeye at porterscustom.com>; "'George Haywood'" 
> <haywoodone at hotmail.com>; <racarbon at optonline.net>; 
> <healeys at autox.team.net>
> Sent: Saturday, March 28, 2009 12:12 PM
> Subject: RE: [Healeys] Carb Adjustment Epiphany
>
>
>>
>>
>> To: 'George Haywood'; 'racarbon at optonline.net'; 'healeys at autox.team.net'
>> Subject: RE: [Healeys] Carb Adjustment Epiphany
>>
>> Perhaps the Swede's don't understand the theory of su's? Does the manual
>> suggest adjusting the balance before or after the mixture adjustment?
>> Dave
>>
>> frogeye at porterscustom.com
>>
>> Porter Customs   2909 Arno NE
>> Albuquerque, NM USA 87107
>> 505-352-1378
>> 1954 BN2  1959 AN5
>> Porter Custom Bicycles
>>
>> cars:
>> www.britishcarforum.com/portercustoms.html
>> gallery:
>> http://picasaweb.google.com/porterscustombicycles/PorterCustomBicyclesStuff 
>>
>>
>> blog: http://porterbikes.com/
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