Looked at the chart - man, I wish I'd had that when I was doing my first
weber conversion!
Some comments: No specification or discussion of the bleed back valve.
That's the little valve in the bottom of the float bowl that allows some of
the gas sent by the accelerator pump to "bleed back" into the float chamber.
I always run a "zero" valve - closed off completely - to get maximum effect
of the accelerator pump. Street cars may need some bleed here.
I use 40 DCOE's on 948 engines. You give up a little ultimate power but the
smaller size gives higher velocity, and better drivability throughout the range.
Street car conversions often go way too high on two things - choke size and
idle jets. My rule of thumb is to use the smallest choke size that I think
possibly will work, and to run the smallest idle jets that I possibly can.
Again, this gives better drivability, and better fuel economy, since 90% of
street driving is done on the idle jets only.
Cheers, Brian
At 07:06 AM 2/1/98 -0500, you wrote:
>For what it is worth, a member of our club gathered all the Weber
>setups that people were using (and a brief description of the state
>of tune) and put the results in an article for our magazine.
>
>It was done a while ago, and while Webers haven't changed, the
>gun setup for motors have changed and may affect the weber jetting
>slightly. In any case, it should give you some things to try!
>
>http://www.cgl.rmit.edu.au/~mg/cars/goblins/tech/webers.htm
>
>Mike
>
>-----Original Message-----
>From: Steve Harrington <porkey@transport.com>
>To: healeys@autox.team.net <healeys@autox.team.net>
>Date: Sunday, February 01, 1998 3:30 PM
>Subject: Weber Help
>
>
>>Does anyone have experience calibrating a DCOE 45 for a 1275 Sprite? My
>>Sprite has a huge flat spot when I accelerate in low RPM - to the point
>>where I have to rev the RPM way up to get going. I'm experimenting with
>>different size jetting, but no success yet.
>>
>>Any recommendations would be appreciated.
>>
>>Thanks in advance,
>>Steve Harrington
>>Porkey@transport.com
>>
>
>
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