Let me know how it works out for ya.. -Dave
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Krister Meister Sent: Tuesday, June 10, 2003 6:04 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: [Chevelle-List] Adjusting Holley 4150 richness Dave, Thank you very much for the detail and step by step! I actually have the ' #s correct List 3419 to be rebuilt as a winter project. The 3310 is what's making the Chevelle work for now. Krister "Dave Studly" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent by: cc: (bcc: Krister Meister/PBU/Nsk-Corp) [EMAIL PROTECTED] Fax to: velles.net Subject: RE: [Chevelle-List] Adjusting Holley 4150 richness 06/10/2003 10:29 AM Please respond to chevelle-list Krister, The screws you see on the metering block are what you want to adjust. For best results, get a vacuum gauge and hook it up to a vacuum port that has manifold vacuum (below the throttle blades, not above). There should be one in front, angled towards the passenger side. In park/neutral, set your idle speed. Since you say it is running rich, try turning the idle mixtures screws on the metering block 1/4 or 1/2 turn clockwise. These screws control fuel flow. Closing them down (clockwise) flows less fuel and should lean out your mixture. Remember to try to adjust both sides of the carb somewhat evenly, probably in 1/4 or 1/2 turn increments. If your mixture is off, then you should hear the engine pick up a few RPM as the mixture gets closer. This is where the vacuum gauge comes in. To really set it right, adjust the idle mixture screws to achieve the highest vacuum reading you can. Now, if the engine speed has picked up, reset your idle speed and try adjust the idle mixture again, looking for max vacuum. It should only take a couple tries to zero-in on something that will let your engine idle. If you don't have a vacuum gauge, just use your ear and listen to RPM. Tune for highest RPM. (if you lean it out too much, RPM will drop again) If you're having trouble, "reset" the carb to a known baseline - close the idle mixture screws all the way, then open each side 1.5 turns and start again. Since you state your car wont idle now, it might be good to start here and then try tuning it. If you're still having trouble after doing all that, you could have a blown/leaking power valve. That will require removing the float bowl and metering block to verify. Hope this helps.. if you have more questions, I'll answer them as best I can.. I've done my share of tuning/re-building Holley carbs and am fairly familiar with them. -Dave -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Krister Meister Sent: Tuesday, June 10, 2003 10:40 AM To: [EMAIL PROTECTED] Subject: [Chevelle-List] Adjusting Holley 4150 richness I have a Holley 4150 List # 3310 on my 396. Even when warm and manual choke completely pushed in - it idles rich. Any idle speed less than 1000 RPM and it will eventually bog out and die. I've searched through Holley's website trying to find tuning rich / lien adjustments with out any real success. The primary meter block has an idle adjustment screw on each side - I am wondering how these are to be set or any other ideas behind getting this to run less rich. Krister Meister Bloomingdale, IL '66 SS #'s matching ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED] ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
