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Carburetors and Carb Tuning.. All info about old school carb set ups..

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Old 08-24-2014, 09:25 PM   #1
sen2two
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Default Possible Weber float height problem...?

I rebuilt and turbo prepped my 51 IDA Weber and attempted to start it. It did not feed any fuel. I am assuming at this point that it is my float setting.

Here's my current tune on my street ported 12a:

*Will eventually go blow through turbo

37mm chokes
3.2 Glass ball needle valve
60f10 idle jet
120 idle holder
195 main
150 air corrector
f-3 turbo e-tube


My question is, can I set my float height without removing the Weber? The way I set the height before involved hanging it upside down.






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Old 08-29-2014, 07:36 AM   #2
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yes, you can set the float with the carb installed. there is a small hole in the top of the carb right above the float, use a small piece of safety wire or a paper clip to measure the height and adjust accordingly.. or they sell a IDA float measuring tool that's pretty trick

https://www.google.com/search?q=webe...rs%3B720%3B568
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Old 08-29-2014, 06:54 PM   #3
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I got it somewhat figured out now. The car starts up just fine. And I ordered one of those float height sight things from JayCee yesterday. That will help get the float height dialed in.

But the car is so damn rich, it idles for at least 30 seconds after I shut the pump off. Lol...

Any tips in a better starting point?

12a street port turbo

51mm IDA Weber
Black plastic float
37mm chokes
3.2 Glass ball needle valve
60f10 idle jet
120 idle holder
195 main
150 air corrector
f-3 turbo e-tube
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what I have:
1985 Gs:12a All motor Drag car - 1973 Rx2: Play car
What I had:
93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2
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Old 08-29-2014, 06:58 PM   #4
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what motor is it on? my motor liked F11 E tubes.. N/A p-port
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Old 08-30-2014, 03:17 PM   #5
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12a street port. As soon as it's running good NA, it's going blow-through turbo. I already prepped the Weber and made a plenum. But I want to make sure it's running clean NA before I tackle the blow-through tuning.
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93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2
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Old 08-30-2014, 03:27 PM   #6
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n/a streetport I would run f7 or f11 E tubes and bring your air jet up to 190.. that will be good for n/a
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Old 08-30-2014, 08:30 PM   #7
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Have any blow-through recommendations? Your the guy to ask...
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1985 Gs:12a All motor Drag car - 1973 Rx2: Play car
What I had:
93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2
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Old 08-30-2014, 11:25 PM   #8
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Quote:
Originally Posted by sen2two View Post
Have any blow-through recommendations? Your the guy to ask...
when you put the turbo setup on, let me know, but for now lets get your car running good N/A
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Old 08-31-2014, 01:04 AM   #9
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very interesting .. similarity to the direction I want to go but have yet to get dialed in as NA so everything on hold
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Old 10-02-2014, 05:42 PM   #10
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Do you have fuel pressure regulator? I didn't have one on my DCO for years because I read that with the Carter fuel pump a weber shouldn't ever need one! That was here:
http://www.racetep.com/webfuelspark.html

Well after years of battling fuel dripping into the throat of my carb I finally put in a nice Holley FPR and set it down to 4psi. Wouldn't you know it, the dripping stopped and nearly all the problems I had been battling since I put the weber in were solved.
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