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.

Weber 45 tuning help.


Dejammey

Recommended Posts

I have a 1976 BMW 2002 with two DCOE Weber 45s a stock head with a reground cam(I have no idea what the cam was ground to) and a performance exhaust header. All of this was installed before I was the owner of the car. I just installed a Petraunix points system in the car an did the timing and a valve job. 

So far the car is running rich in my opinion. She starts good drives ok but when you get on it she bogs down. My spark plugs are black on the tips and not brownish as they should be. When I ride on the highway she does good up to around 55-60 but after that I really feel that she is flooding herself with too much gas and my power drops off. Also my MPG is very bad. Not 100% how bad I just know I am going threw some gas. 

What I have in the 45s now. I checked and made sure all these numbers are the same for both carbs. 

Main Jet 140

Air Jet 180

Idle Jet 45F8

Main Venturi 34

Emulsion Tube F16

I was reading BMW 02 Restoration Guide and they recommended. http://midlifeclassiccars.com/product_details.aspx?item_guid=33bdca9b-f204-44dd-a8d8-a44f758df135

Main Jet 125

Air Jet 180

Idle Jet 45F8

Main Venturi 34

Emulsion Tube F9

Should I make changes to on the main jet and the Emulsion tube?

Thanks for any help guys.

Link to comment
Share on other sites

A 140 main seems mighty rich. 125 would be a lot more like it.

While you might also find that changing your emulsion tube will help things a bit, make one change at a time.

Installing a wide-band O2 sensor will make your life much, much easier for dialing in your carbs.

williamggruff

'76 2002 "Verona" / '12 Fiat 500 Sport "Latte" / '21 Toyota 4Runner TRD Off Road Prem “The Truck”

 

Link to comment
Share on other sites

Check your float level first, if you have brass floats they should be 8.2-8.5mm if they are plastic try 12.5mm. Start by changing the main jets to the 125. You might need to go as rich as 130 and you might want a larger Air corrector but start with the main jets. The difference between the F9 and F16 E tubes is very small (the F9 tends to richen a bit at the top and the F16 is more even in mixture bottom to top). Start there. Are you running velocity stacks inside the air cleaners? If not you should.

1970 1602 (purchased 12/1974)

1974 2002 Turbo

1988 M5

1986 Euro 325iC

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...