Re: Power valve.
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Re: Power valve.



steve,

sorry for jumping in here late, 
what is your timing, ignition, and distributor situation?  i would get get that figured out before you tackle the carburetor.
do you have light weight springs for your advance weights in the distributor?
what size accelerator nozzles do you have in your carburetor?  (bigger may not be better)
what is your final gear ratio?
did you notice what RPM your stumble occurs at?

mike 

On Tue, Jun 27, 2017 at 1:24 AM, MO <micher@xxxxxxxxxxxxxxx> wrote:
I  am trying to figger out a stumble in my Holley 4250 with mechanical secondaries--750 CFM.  Low gear, rolling at idle, punch the throttle and get a substantial hesitation--not really a bog.  about 1500 RPM at full throttle it takes off like a striped a**ed ape!.  I think I have plenty of accelerator pump now.  I put a 2.5 power valve in  because I thought I had low vacume ..my bad.  I put the vac gauge on and actually have 12.5  inches at idle.  Do I just put a 6.5 power valve in, or is there a better way to know which PV  I should use?  BTW  the engine idles fine, but I have not fine tuned the idle mixture yet. .............................MO

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Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks!
 
1962 to 1965 Mopar Clubhouse Discussion Guidelines:
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