DCOE float level setting

[Hans]

So I'm trying to confirm the float level setting on my Spanish 40 DCOEs. As I understand, I'm looking for 14 mm at the bottom of the float (with floats hanging from vertical cover). My floats each have a little plastic nub right where the 14 mm dowel starts to squeeze between the float and the cover. Where is the dowel supposed to be for the measurement?

[2002Scoob]

 

[Hans]

Thanks. So 12 mm on the plastic floats mid point on float?

[2002Scoob]

Not necessarily, but the middle of the float is where you should measure from based on the above video.

 

Not sure the ideal height for plastic floats, as I have brass in my car. A quick google search will likely yield you the info you're looking for thou.

[2002Scoob]

Boomskis- Google to the rescue. 

 

Edit- although I just read it and C.Diesel quotes as 12.5 at the TIP of the float... so I think 12 in the center is likely a safe starting point.

Edited May 15, 2018 by 2002Scoob

[Hans]

I saw that 12.5 mm at the tip (I assume the tip furthest from the hinge) recommendation, but that is where the little plastic nubs stick out of the float - sort of like the seams on the brass floats. I also saw 14 mm there on some vendor page. Anybody seen those nubs? Or 12 mm mid point?

[zinz]

page 45 here...

 

https://www.lainefamily.com/images/WeberTuningManual.pdf

 

 

[TobyB]

...for brass.  

 

I used the google-  measure from the flat, NOT the seam.

 

I keep finding 12mm, Hans, not 14mm.  But there's a 'window' where different

emulsions like to work, so while the float level is GOSPEL, it's also adjustable

to a degree you have to determine by testing. 

Likewise, fuel slosh on (lefhand?) corners can really mess with you-

from the Alfas that were beating me, I learned to cover a small part of the float 

chamber to keep fuel out of the air correctors...

 

http://www.apexspeed.com/forums/showthread.php?64306-Weber-40-45-DCOE-Experts-Proper-Float-Level

 

was fun.

 

 

as well.

 

t

[Hans]

So what are the symptoms of the float being too low (gap too big)?

[KFunk]

Yeah, I’ve never messed with measuring it while it’s hanging any way outside of the bowl in my 11 years of DCOE use.  It’s way too inaccurate, and easy enough to measure actual fuel level, which is what really counts.  The posts on the apex link outline the process.  Pop off cap and remove main jet holder, and let car idle.  Put a stick of some sort down the main jet hole, I’ve used twigs I’ve found sitting around.  See where it gets wet, and measure that distance from top of carb.  That apex link says 25mm, which seems right ballpark.  I was thinking 24mm, but not sure.  I probably have some posts on it before if you search.

if it’s not right, pop float out and adjust a hair, then re-test.  

If fuel level isn’t high enough, car is gonna stumble real bad if you really hammer on it in some curves.

if fuel level is too high, then it’s gonna stumble when you hammer on it as well, hah.  When it’s too high it sloshes over into barrels and floods it out, I think.  

[Hans]

Floats at just under 13mm, fuel level about 27mm.