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SU Jets - How Many Flats? 120-130 1965

posted by  jjai on  Tue May 27 11:14 CST 2008
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last visit: Fri Nov 19 20:24 CST 2010
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Hi Everyone,

I'm having a heck of a time trying to "tune" my carbs (sync and set the jets). I'm curious -- how many flats out from completely in are you all setting your jets?

Mine are currently 20 flats out from completely in -- I suspect this is too rich, but the car seems to run well at this setting.

Some more detail -- I tried the approach of screwing in the jets until the idle gets rough, but I got them all the way in without much change. Screwing them out (richen) didn't seem to have much effect either. I don't have lifting pins, so I haven't been able to try the piston lift test. As a result, I've just been changing the jet settings, going for a test drive, set jets, test drive, set jets... rinse, lather, repeat. That's how I ended up at 20.

Idle also sounds high (1000 RPM?), but I don't have a tach, so I don't know the actual reading. Setting the idle lower results in a rough idle.

FYI, I started down this road because I was getting awful gas mileage (around 15 mpg -- I'm gunning for you, Repairman Jack!!) Also... because I screwed up the jet settings while doing other work...
--
Jerry | www.65brick.blogspot.com |






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New SU Jets - How Many Flats? [120-130][1965]
posted by  jjai  on Tue May 27 11:14 CST 2008 >


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