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Old 03-12-2019, 02:46 AM   #1
NJAus
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Question Anti Dieseling Solenoid Idle Adjust

Hi All,

I have a 427 big block which has a newish Holley carburettor and anti dieseling solenoid. The car currently idles between 500-550 RPM.

I want to bump this up to 650 RPM, can I just adjust the idle speed screw?

Thanks
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Old 03-12-2019, 11:37 AM   #2
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in most cases YES!
why not try it, in 50 rpm stages untill you get where you intend on the idle rpm,
and see if you get results you like?
keep in mind if its an auto trans,
it may make the car a bit more prone to creep forward in gear
if your parked at a light so youll need to keep a foot on the brakes.
obviously if things don,t work out the way you expect...
you can back track and be no worse off,
and have not spent any money and very little effort
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
Old 03-14-2019, 10:46 PM   #3
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Thanks I thought as much, the car is manual so it wont creep at the lights.

Do you turn the idle speed screw clockwise and increase in idle? Or the other way around?
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Old 03-15-2019, 06:02 AM   #4
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https://www.google.com/search?q=holl...TF-8#kpvalbx=1

https://www.onallcylinders.com/2013/...y-carburetors/

http://www.badasscars.com/index.cfm/...rod/prd105.htm

http://garage.grumpysperformance.com...mps-cams.1790/

http://garage.grumpysperformance.com...ce-curve.4683/

http://garage.grumpysperformance.com...y-is-not.8485/

http://garage.grumpysperformance.com...and-links.109/

http://garage.grumpysperformance.com...vels-etc.1115/

http://garage.grumpysperformance.com...53/#post-52071
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Old 03-23-2019, 03:57 PM   #5
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Thanks for the information. I will be getting to this tonight.

Out of curiosity, if the idle speed is increased will it move the throttle linkage that the idle solenoid pushes against? I am wondering if the solenoid would need to be adjusted as well or are they somewhat independent adjustments?
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Old 03-23-2019, 08:14 PM   #6
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applications and clearances differ but the change in carb throttle blade alignment will be so minimal in most applications that no changes will be required in the solenoid
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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