Gentlemen: Good Morning/afternoon. I Recently Fired My L-71 That Was Professionally Rebuilt To Factory Specifications Including The 143 Cam That I Bought Almost 20 Years Ago. The Carburetors Were Restored By Mr. Koontz (sp) And The Factory Ti Distributor Was Restored By Dave Fiedler. The Vacuum Can Is A Repro 201. Long Story Short The Engine Wouldn't Idle Very Well. I Went To The Archives And Found A Wealth Of Information Dealing With The Subject That Everyone Here Is No Doubt Already Familiar With. My Plan Was To Order The Recommended Aftermarket Vacuum Advance That I Soon Found Was Not Available. I Then Checked And Found That There Was No Vacuum At The Factory Port Allegedly Designed To Advance The Timing. The Vacuum Did Appear At Higher Rpm But Was Not Present At An Acceptable Idle Speed Of Approx. 900 Rpm's. When The Timing Was Advanced To Around 16 Degrees The Motor Idled Nicely And Runs Like A Watch. So, Since I Don't Want To Lose Points For Re-running The Vacuum Advance Line To A Decent Vacuum Source As Outlined In Previous Discussions, I Decided To Remove The Distributor To Have It Re Curved To Provide More Initial Advance At Lower Rpm. I Assume This Will Be Accomplished By Modifying The Centrifugal Advance Mechanism. True Or Not True And Is This A Valid Method For Improving Low Speed Engine Performance/idle Without Rerouting Vacuum Lines And Or Losing Judging Points? As Always, Thank You For Helping.
Don
Don
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