Re: Tuning issues

[Darwin <65Val@xxxxxxxxx>]

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> I had to drill a 1/16"
> hole in the front throttle plates of the Holley carb to close the
> throttle plates past the part throttle slot.  This allowed me to get a
> better idle mixture screw adjustment


Brian....can this same result be accomplished by turning the little screw 
under the secondary linkage to hold the sec.plates open slightly at idle? 
I've done this before with similar results.

Thanks,
Darwin/Victoria BC/Canada
'65 Cdn.Val.Cust.100 'vert
Slant 6/factory 4 speed

----- Original Message ----- 
From: <ledman_70@xxxxxxxxxxx>
To: <1962to1965mopars@xxxxxxxxxx>
Sent: Friday, April 01, 2005 2:29 PM
Subject: RE: Tuning issues


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I've already learned as much about carbs just today as I already knew!
Thanks guys.
Jeff
Brian Schlump wrote:
> I've used the Mopar 509 cam on 2 different engines: '69 - 413 low
> compression engine, and '64 Max Wedge.  Both engines run 4 speed
> transmissions.  My friend has the 509 in his 383 Magnum engine with
> Edlebrock aluminum heads & a 4 speed.  He runs a Holley carb and
> typically runs 5 - 6 inches of manifold vacuum.  My cars have run
> anywhere from 5.5 - 7 inches.
>
> I used to run the 484 Mopar cam in a 440 GTX and I had to drill a 1/16"
> hole in the front throttle plates of the Holley carb to close the
> throttle plates past the part throttle slot.  This allowed me to get a
> better idle mixture screw adjustment (which might be part of your
> problem).
>
> When I put the 509 cam in my 426 last year, I was having similar
> problems adjusting the Carter carbs at idle. Another problem was that
> the engine was idling at 1,500 rpm while I was driving it, even though I
>
> would adjust it for 1,000 rpm in the driveway.    Don D. helped me with
> the idle problems by suggesting that I drill a hole in the front
> throttle plates on those carbs, just as I had on the Holley.  I used the
>
> 1/16" drill on those, and then the idle mixture screws did what they
> were suppose to do, and I had no more of the fast idle while driving.
>
>
>
>
> '64 Belvedere
> Woodstock, IL.



Jeff Adams
64 Polara

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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. 


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