Hi Lew,
I 2nd Ross's thoughts on using the Unisync. I have one and at idle
the little doohickie hardly moves off the bottom. Can't tell a thing
unless you have higher rpms. Then trying to hold the exact same rpm
while switching back and forth between carbs is a pain. I prefer the
sound that you hear plus looking at the carb pistons and seeing if
they are generally about the same height. If you want to borrow a
unisync I'll loan you mine.
> 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
Brad
1964 Spitfire4 BFC25720L (After 10 years will be on the road in
March!!!)
1966 TR4A CT72398L (Needs Restoration)
1951 Dodge Truck 82217766 B-3-B-108 (Boxes & Boxes of parts right now)
|