Volvo RWD 120-130 Forum

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possible answers for RJAMER 120-130

posted by  Volvo From Heck on  Mon May 21 06:14 CST 2012
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last visit: Mon Oct 13 20:56 CST 2014
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RJAMER, I took the liberty of starting a new thread with your inquiry about performance with the 32/36 rather than stepping on the "Are you tired of.." thread. You wrote----"I have a weber carb on this engine we just put in,, a fuel injected B 20F that the previous owner converted to SU carbs..( he kept the SU s ) Anyway it runs good but not perfect.. I think I will have to get some more jets and play around until I get the right one by trial and error.. When I step on it and the second chamber kicks in it goes like stink,, but when I try to maintain 60 mph or so it will flutter and kick a bit.. I have a few jets in a kit that came with the car but I need bigger ones,, I think ,,for more gas.. I am open to suggestions if anyone knows the right jets for a B 20 F head... DGEV 32/36 weber carb is the one I have.."
My first question is--was this a "kit" specifically for a B18/B20? -- or a 32/36 manifold along with an "unknown" 32/36 carb. Those carbs came in kits for everything from 1200cc Datsun motors to motors larger than the B20. My point being--was the carb jetted close to the needs of the B18/20 from the get-go?
For the B18/20 you'll probably see the primary (32mm throttle) main jet in the 125-140 range--the secondary (36mm)in the 140-160 area. The air correction jets (ACJ for our purposes) need to work together with the main jets---and the contour of the emulsion tubes (ET)- located below the air correction jets are very much involved with proper mixture at steady cruising speed. The wrong contour ET can cause a leaning out condition.
Another - but rare - occurrance could be icing of the carb. To know that would require stopping when this happens--and looking down the carb throat to see if ice is forming. One cure for that is pre-heated air. The carb filter housing from Ford Pinto can be modified (they used a Holley version of the 32/36) to fit the generic Weber. Do you have the manifold coolant passage hooked up to the heater hoses?
My notes are buried somewhere and it's been a very long time since I've worked with a 32/36 so I can't be more specific---but it would help if you made a posting listing all the jet sizes in there now. -- Dave








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    possible answers for RJAMER 120-130

    posted by  Rjamer on  Sat Jun 2 11:03 CST 2012
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    last visit: Sun Oct 5 11:53 CST 2014
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    My problems with the weber carb surging are over with.. We replaced the Primary Main jet with a 165.. This weber carb was taken off the old B 20 B engine and had a 140 jet which worked fine in B20 B..But of course the B20 F has a different head which caused the problems.. We went up to a 150 as that was the biggest jet I had in my collection of jets but it was still surging.. I ordered a 160 and a 165.. We tried the 160 but still not perfect.. We put the 165 in and it runs like a clock with all kinds of torque and power.. My brother in law guessed this was the problem but we just got the jets and put them in yesterday so luckily we went barking up the right tree..








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    possible answers for RJAMER 120-130

    posted by  Rjamer on  Mon May 21 16:48 CST 2012
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    last visit: Sun Oct 5 11:53 CST 2014
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    Hi Dave.. This in the jet sizes in the car now :: Primary Main Jet 150 :: Secondary Main Jet 145 :: Primary Air Jet 165 :: Primary Emulsion Tube F50 :;Secondary Air Jet 180 :: Secondary Emulsion Tube F50 :: Primary Idle Jet 075 : Primary Idle Jet 075 :: Secondary Idle Jet 065 Right now ,,"we think" by increasing the Primary Idle Jet from a 150 to a 160 or 165 might help.. Another problem is that we do not know the proper timing setting for the B 20 F as we have the the old B 18 distributor that came with the B 18 to B 20 B update.. We did put a electronic ignition this distributor and of course now this fuel injected engine is a carb engine.. Anyway it could be a lot of trial and error with hopefully not too much error.. Thanks for your help !!








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      possible answers for RJAMER 120-130

      posted by  Volvo From Heck on  Tue May 22 09:58 CST 2012
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      last visit: Mon Oct 13 20:56 CST 2014
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      What I can do is scan some pages from a book published by Weber with lists of jets used in production cars equipped with DGV type Webers. It may help give you a feel for what would be appropriate for your application. Write me at----fastforwardphoto(AT)yahoo(DOT)com----I also have a collection of jets pulled from Webers and Holleys if you need a variety. -- Dave








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    possible answers for RJAMER 120-130

    posted by  Rjamer on  Mon May 21 07:41 CST 2012
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    last visit: Sun Oct 5 11:53 CST 2014
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    Hi Dave I still have the receipt for the weber car so I am pretty sure this weber carb kit was bought for a B 18 as that was the original engine..This engine was replaced by a B 20 B by the previous owner and now I have replaced the B 20 B with a B 20 F engine.. My brother in law who has been helping me has the jet sizes written down so I will find out what they are today when I see him.. A jet kit came with car with but there are quite a few jets missing.. There is a tag on the carb.. 32/36 DGAV33B1 K80904 is printed on the tag. And yes,,we have the coolant hoses hooked up..This carb worked fine on the previous B 20 B engine.. Thanks for your help.. Robert








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      possible answers for RJAMER 120-130

      uid 37336's pic
      posted by  B20Paul. on  Tue May 22 13:01 CST 2012
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      last visit: Mon Oct 20 10:54 CST 2014
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      I would start by using the stock jetting for a Pinto 2 litre(roughly same capacity, airflow & power) There's nothing really wrong with the DGV except it is really hard to jet & on the small side, about 130HP max.

      Have you looked at Misab's website for jetting recomendations?

      If you need a bigger carb for the manifold, 350 & 500 2bbl Holleys are a very good step up. Only very minor mods to make them work on a 4 + simple to jet.

      --
      Three 164's, Two 144's, One 142 & a partridge in a pear tree.







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