Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Anyone have 003 advance curve?


Recommended Posts

I would like to see if I can get data on the advance curve on an 003 distributor with and without vacuum applied. Does any such data exist anywhere?

So what I am trying to look in to is the feasibility of running the distributor with the vacuum advance disconnected. Why? I am having a minor idle issue with my new motor and I am taking a WAG that it could be related to the vacuum advance module.

Here is my thinking - please correct me if I am out-o-whack :) I just built an engine with a 292 cam. Setting the idle mixture and speed on the 38/38 Weber per the instructions I have found online can get me a lopey idle at around 900, my expected results for the higher duration cam. When I actually drive the car and come up to a stop, probably more than 50% of the time the idle sticks at about 1400 RPM. I am pretty sure the linkage is not getting stuck - motor mounts are new, and even if I pull up on the gas pedal it will not drop. I can get to my lopey 900 RPM idle if I do not put the clutch in until the engine is below the ~1400 RPM mark.

So what I am thinking is that when I adjust the idle mixture and speed it is at low RPM with crap for vacuum due to the cam. When I put the clutch in at a higher RPM when coming to a stop, I have a higher vacuum condition (keeping the timing more advanced), and keeping the idle higher. Is this possible? Am I crazy? Is there a simpler explanation (assuming the linkage & motor mounts are good)?


'72 2002

'91 325i

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

  • Create New...