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Old 08-24-2007, 06:45 PM
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Rick Parker Rick Parker is offline
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Join Date: May 2001
Location: California, Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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Keep in mind this is a 289 OK. Pretty healthy cam but definately not "undrivable". I soldered the 1.20 Idle holders up and redrilled them to 1.0 (leaving room to go to 1.10 if needed) I am currently using 60 F10 for Idle jet. 1.55 mains and currently 2.00 air correctors. Accelerator pump squirters are .50 and the bypass in the bottom of the float bowl is .55. All this with F7 emulsion tubes. My experience while initially tuning was that the standard 1.20 Idle holder was causing it to be lean. Although I did not drive it until put the resized 1.0 Idle holders, I could immediately tell that it reacted differently upon starting. I will also say that I will try the recommended 1.10 sizing a little later (which will make it idle leaner) but right now there is no black exhaust while idling and the transition is seamless (for my application) without the 3rd progression hole.
I have not done any plug cuts yet. I have spent a lot of time and effort on this project and used information provided by several individuals who were kind enough to assist by sharing information (thank you all very much!) in helping me try to find a base line from which to start. I think I am ultimately real close, but still have some work to do. It is quite a journey.
I will be happy to assist any of you too.
Again thanks to each of you who shared info and made recommendations for my application. That's what this site is all about.
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As you slide down the Banister of Life, may the splinters never be pointing the wrong way

Last edited by Rick Parker; 08-24-2007 at 06:56 PM..
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