Hi Mike,
I have the same setup on my '70 Mk3 except for a hotter cam. I have noticed
that my car idles fine for a while and then it starts to fall off. I'm
thinking that the needles are too rich at the top so next weekend I'll try a
leaner set and let you know. I notice a big difference in the way the
engine pulls through all of the gears with the HS4's. Anybody want a good
set of HS2's and manifold?
-----Original Message-----
From: Mike Perry <mikep@michindust.com>
To: spitfires@autox.team.net <spitfires@autox.team.net>
Date: Sunday, March 26, 2000 4:51 PM
Subject: Runability Troubles
>
>Good Day....I hope everyone enjoyed their cars this weekend!
>
>I have been trying to nail down a problem with my Spit last fall, and, it
>appears this spring as well.
>
>After installing my dual HS4 setup, syncing the carbs (UNISYN) and checking
>the mixture (COLORTUNE), the car runs great, except when in stop and go
>traffic or after an extended idle. It "feels" like it is flooding itself,
>and if I can stand the rough running and occasional backfire, it clears up
>in about 1/4 to 1/2 mile. It will remain running nicely until I get back
>into the stop and go traffic. In fact, it has never run better outside of
>this problem...no stalls, and no hesitation all the way through the rev
>band.
>
>I installed Gross Jets in place of the float needles, but that does not
>appear to have made a difference.
>
>Other potentially useful information:
>1296, low miles
>Headers
>Dual HS4s, recently rebuilt (within 800 miles
>Monza Exaust
>Low restriction air filters (foam element type)
>
>Has anyone experienced anything similar? Any help is appreciated.
>
>Mike Perry
>72 Spit
>
>
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