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Username Post: carb/vacuum issues advise needed
64cv 
"5th Year" Silver Supporting Member
Posts: 647
64cv
Reg: 06-05-08
06-12-12 05:55 PM - Post#2236404    
    In response to sam 15

Rick,

First, I agree with everything Doug says.

Second, I've been there. If you have a non-stock configuration, it may take quite a bit of advanced tuning to make things right.

It may not be a good a good assumption that your car has a mild cam.

Rich idle, low vacuum and "a cam" makes me suspect that your idle speed has been adjusted to the point that you've got too much transition slot exposed on your carb.

The only way I know to check the transition slot is to remove the carb and check the vertical vs. the horizontal height of the transition slot below the throttle blade. If it's noticably taller than it is wide it needs to be 'fixed.' Ideally is should be square. Ask us what 'fixed' means; it's not entirely obvious.

It's easier to remove the carb than the entire intake.

What do you see?

Brad
Life is an optimization problem; make the most of it!

'64 Impala Convertible, Blueprint 383, Tremec TKO 5sp, 4-wheel disc brakes.

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