DCOE questions

L

Larry Frankenstein

Well-known member
I’m finally getting to finishing up the DCOEs on my 850 and I have a couple questions.

Are the start / choke devices necessary, or can/should I remove them? One of the Weber sites offer a blank cover to go over the space. If I remove those do I remove the piston and spring assy also?

Thank you,
L
 
I never used them when I ran DCOEs on my Mini. I think that we just left them in but I don't exactly remember.
 
Larry,

Just make blanking plates and cover them without removing the plungers and springs.

Another race-prep tip is to tap (6x1.00mm) the ports that come from the starter/choke mechanism and plug the hole with a metric 6x1.00 mm set-screw. Then just peen over the edge of the hole after you install the set screw to keep it from backing out. I also used Red Loctite on the threads.

This is the hole located right behind the butterfly at about a 45º angle up to the choke/starter mechanism. If you don't do this, the starter/choke plunger & spring assembly can and will vibrate open at higher RPM, letting in un-metered fuel into your intake manifold and it will drive you nuts trying to figure out why one cylinder is running richer than the other 3!! :doh:

Takes about 10 minutes and will save you a lot of headaches later. Ask me how I know!!

Mark
 
Hey Larry,

Just a lot of chasing my tail trying to sort out the A/F ratios on the car vs. what the plugs looked like. Didn't happen every session, the A/F ratios didn't always respond to jet changes like I expected, etc.

Finally occurred to me what was going on and plugging the starter ports fixed it!

Good luck!

Mark
 
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