Weber jet question

[ToddK]

The 45 DCOE's we pulled off of the parts car had two jets under the little round cap with the butterfly wing nut. I assume these are for fuel. One set was labeled 55, and the other set was stamped 135. The barrel which went to cylinder #2 was actually a 115, but I'm assuming that was a mistake not being a 135 like the rest. My question to all of you weber gurus is this. Does that sound like a good base line jetting for a stock motor, or does that sound like it would be for a hopped up one. I think the motor might be built up a little, and here is why. It had a deep exhaust note, the motor shut off instantly when you turned it off, and we got 180PSI across the board when we tested it at wide open throttle.

[racebmw]

put 40 DCOE's on a stock motor. 135 mains are in the ball park.

The only way to know for sure would be to drive the car and see how it accelerates against a stopwatch. Also you could see if it pulls well out of a corner. It it is over-carb'd it will stumble badly in the corners.

You could pop the valve cover and see if it has a non-stock cam. That would be a big clue.

Jeff

[TobyB]

because you can put different venturis into a 45...

so if you have 30mm venturis, you could be way rich,

but if you have 38's you might be in the ballpark.

Take off the air horn, and shine a light down the bore of the carb.

If you're lucky, you'll be able to see a raised number in the restrictive

'choke' portion of the throat. This is the inside diameter in MM. It's also removable if you take the little safety- wired bolt off the bottom of the carb.

You really should buy the Pat Braden and Haynes Weber books- together, they cost less than a set of idles, air correctors and mains, and if you had them you'd know WHAT an air corrector is!

that's my schpiel, hope it helps,

t

[ToddK]

I have a weber book around here somewhere, I just have to find it. It's been years since I have delt with any car that didn't come with a V8. I have to relearn everything I forgot about inline engines and sidedraft carbs.