RE: drowning 383

[Willard Edison <waedison1@xxxxxxxxxxx>]

Don, I bought your book and CD, they are great, but nothing compares to the
knowledge you share with us on this website. Having a 383 that bogs on
initial takeoff, I now know that it's not inherent to the car, but something
that can be corrected.
Thanks so much. /Butch /Ferndale, WA 

-----Original Message-----
From: Don Dulmage [mailto:big-d@xxxxxxxxxxxx] 
Sent: Wednesday, May 09, 2007 4:45 AM
To: 1962to1965mopars@xxxxxxxxxx
Subject: drowning 383



A 750 was not drowning you 383. Something else was wrong. Jetting wrong ,
bad carb overhaul. Busted or incorrect power valve. First a properly jeted
carb does not drown anything. it mixes 1 pound of fuel witrh every 13 pounds
of air regardless of what is under it for an engine. unless  someone has
monkeyed with it.  A bigger carb does not dump in more fuel that a smaller
one at the d same RPM. The reason for carb sizing is as follows. When a carb
is too big for a motor then at lower speeds  like under 2000 rpm the s
airflow is not high enough or stready enough to give the venturi booster
nozzle a strong enough signal so sustain a steady fuel flow. When you floor
the throttle even moderately hard the engine bogs as the engine does not
have enough air flow to support fuel delivery. Just  exactly the same as a
airplane wing on a  plane going too slow to give enough lift to lift the
plane off the runway. In fact it is the same principal . The bernoulli
principle. 
If you lived nearby and brought the 383 and 750 around i guarantee when you
left it would glaze your eyeballs over and you would have to get your teeth
fixed because you would be able to stop smiling. You need to find a new carb
guy i think. it cetainly has nothing to do with the 750 size. 
Carb size relates to airflow not fuel. flow. fuel flow is determined by
jetting which is approx 1/ 240th of venturi sze which keeeps the mixture in
constant. relationship . 
Reeally i am not steering you wrong I have n done many many 383s (and 349s )
with750  Holleys (3310) Have you still got the 750?  
DonD
Author of
Return to Deutschland (True Adventure)
Old Reliable (Mopar)
http://altonapublicschool.faithweb.com/

http://seniordragster.bravehost.com/index.html
[Non-text portions of this message have been removed]


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----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.