Bryon,
I once had a problem that sounds identical to the one you describe. Mine
was with a Holley 600 cfm vacuum secondary (1850) carb. I spent two days
working on it, blew carb cleaner through every passage and orifice I could
find. It would run fine at first, but after a lap or two around the block
it wouldn't idle again. I'm sure there was a tiny little UFO in there
someplace, but a big race weekend at Willow Springs was coming up, so I
went down to the local speed shop and bought a brand new one. It had a nice
PCV hose connection to boot. I've been using the same basic carb ever
since, just a few mods here and there - center pivot floats, different
vacuum secondary springs, etc., etc.
The only other carb I've used to any extent on my Tiger was the Carter 625
cfm spread-bore. It was probably a better street carb than the Holley. It
ran great just the way it came, no adjustments needed. It had smaller front
venturi than the Holley, but I didn't really notice any difference in
partial-throttle response. I have never used a 465 cfm or other smaller
carb as I have tended to go for maximum output rather than driveability,
although not to the point of using a double-pumper. I am starting to
consider trying another carburetor though, especially considering all the
negative discussion lately regarding Holley.
I'm not sure just what your priorities are with your Tiger, but I wouldn't
let this bad experience sour me on Holleys. They have their place. What is
the history of your 600 double-pumper? I'm pretty sure a new one right of
the box would work pretty well. Maybe you can find someone who would let
you try out their carb (one you know works right) for awhile to see how you
like it. As long as your motor is reasonably stock, you don't really have
to make any changes from the way comes out of the box. That's not to say
you can't improve things some, but the basic jetting and power valve will
be pretty close, if maybe a bit on the rich side. A good rule when making
changes is to make only one change at a time, otherwise you may "lose the
rabbit" as they say. With Edelbrock carbs, I assume there must be
adjustments, although I haven't a clue what they would be or how to proceed.
I hope you find a solution quickly so you can start enjoying the beast.
Bob
At 06:58 PM 2/22/00 -0600, Bryon K. Fortney wrote:
>Well I gave up. Took the Tiger to a local mechanic and crossed my
>fingers. He was recommended by the local speed shop and has spent most
>of the last ten years building race cars. Is a "holley" specialist.
>
>Thanks for all the help I tried almost all of the suggestion (w/o buying
>a new carb). I will pass on any information that may help others.
>
>--
>Bryon K. Fortney
>
>bfortney@us.oracle.com
>281.286.0026(Home Office)
>713.374.2130(Office)
>713.502.2867(Cell Phone)
>1.888.779.8979(Pager)
>
>Oracle Corporation
>1200 Smith Street
>Suite 2700
>Houston, TX 77002-4401
>
Robert L. Palmer
UCSD, Dept. of AMES
619-822-1037 (o)
760-599-9927 (h)
rpalmer@ucsd.edu
rpalmer@cts.com
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