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Re: carb. adjustments

To: "triumphs@autox.team.net" <triumphs@Autox.Team.Net>, "lew" <lsmc@lightspeed.net>
Subject: Re: carb. adjustments
From: "Ross Vincenti" <RVincenti@lbfc.com>
Date: Thu, 19 Feb 1998 8:55 -0800
     Lew wrote:
     Can someone please tell me where i can get the colour (color?) tune 
     spark plug for tuning carbs. Also, where can i get one of the airflow 
     doohickies that measures the airflow into the carb.
        thanks once again,
     Lew 63 (getting exhaust today!) and 67 spits
     
     =================
     Lew - I don't want to sound like a throwback to ancient times, but 
     have you tried to balance them by using your ears and listening?  I 
     have tried the Unisync on my 64 Spitfire's twin SUs and was not 
     satisfied with the results.
     
     Someone on the list a long time ago discussed the technique to balance 
     twin SUs with a length of rubber tubing (and the SU Rebuild book I 
     bought from Classic Autobooks describes it too).  I ended up following 
     the list member's recommendations and was very surprised at how well 
     it works.  You need a pretty sensitive ear, and a lot of patience, but 
     they were right on the money when I finished.
     
     May I be so bold as to make a suggestion?  Before you spend the money 
     on a Unisync or other flow measuring/balancing device, try the old 
     rubber tubing method first.  Once you have the carbs as close as you 
     think you can get them, borrower someone's Unisync, stick it against 
     the carbs and see how far off you were.  I would be willing to bet 
     that you can get them awfully damn close if not perfect without the 
     balancing devices.  My $.02 worth.
     
     Ross D. Vincenti
     64 Spitfire 4
     64 Porsche 356C Coupe

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