 Carb Setting Nightmare, Always better to do it yourself?? |
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| vesnyder |
 Sep 27 2008, 06:29 PM
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#1
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Senior Member  Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933  |
I have been having issues with adjusting the carbs on my rebuilt 1911 so I thought I would see what a professional could do. This local mechanic specializes in Porsche's and has recently gotten a dyno so I thought I would have him adjust my Webers. The car was running fine but was rich at higher RPM's as confirmed by his dyno and sensors he was using to adjust. I had 28 mm venturis and 115 mains. It ran good but the rich situation gave me concerns particularly on a rebuilt motor. I went to pick it up after he had the car for several days and he said he was having issues. The car was running like crap, backfiring and missing. He said the carbs were adjusted good but it was either the distributor or the valves??? He had put in 195 mains and 34 mm venturis? Upon further inspection he had a 185 in one of the carbs? WTF? On top of that he charged me $320? I am done with so-called experts. This takes the cake!
BTW I am working with Jogn at AirCooled to fix! |
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| vesnyder |
Sep 28 2008, 10:04 AM
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Senior Member Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933 |
Thanks! I was moving in the same direction. What is the "200 Air" recommendation?
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| ArtechnikA |
Sep 29 2008, 10:08 AM
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#3
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(vesnyder @ Sep 28 2008, 12:04 PM)  Thanks! I was moving in the same direction. What is the "200 Air" recommendation? Air Correction Jet. A typical Weber jet stack is (top to bottom) Air correction jet, emulsion tube, main jet. Carbs tend to run increasingly rich as the airflow increases. The air correction jet provides a compensating air bleed to progressively lean the mixture as airflow increases. If your AFR is decent up to peak torque but fattens up too much after that, a bigger air correction jet is the right call. It's all about balancing all the nonlinearities... Also - you can't be too quick to blame your wrench just because you have one jet that is marked differently than the others. Just as there are jet reamers that make the holes bigger (without remarking the jet...) there are jet gauges that let you measure the -real- size. For background - the size of a Solex/Weber/Dellorto (maybe others...) jet is the diameter of the hole in hundredths of a mm. Eg: a 115 jet is 1,15mm DIAMETER. Flow is proportional to the AREA. |
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| r_towle |
Sep 29 2008, 10:53 AM
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#4
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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QUOTE(ArtechnikA @ Sep 29 2008, 12:08 PM) It's all about balancing all the nonlinearities... (IMG:style_emoticons/default/idea.gif) I need a new dictionary. Rich |
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Posts in this topic
vesnyder Carb Setting Nightmare Sep 27 2008, 06:29 PM
Mark Henry If there is no issues with the engine (condition, ... Sep 27 2008, 07:04 PM Mark Henry my linkage on a 2.6l T4 Sep 27 2008, 07:17 PM
r_towle
my linkage on a 2.6l T4
Nice and pretty.
Got a ... Sep 28 2008, 10:58 AM Zundfolge So is $320 the going rate for setting up carb... Sep 27 2008, 07:20 PM Jake Raby 320.00 for a day on a chassis dyno is fair, BUT he... Sep 27 2008, 11:19 PM Racer Chris I agree that 32mm venturis in 40mm carbs would lik... Sep 28 2008, 12:29 AM SGB Can't get this kinda qualified advise for mere... Sep 28 2008, 01:00 AM SGB
It's all about balancing all the nonlinear... Sep 29 2008, 07:37 PM chris914 RE: Carb Setting Nightmare Sep 28 2008, 03:25 PM chris914 RE: Carb Setting Nightmare Sep 28 2008, 03:30 PM gopack That last one looks like mine. Who makes that one... Sep 28 2008, 04:44 PM chris914 It's made by CSP in Germany. Bolt it in, adjus... Sep 28 2008, 05:36 PM mattp I really like the set up but cant seem to find it ... Sep 28 2008, 06:53 PM chris914 Thanks, The bracket is made of stainless steel to ... Sep 28 2008, 09:29 PM watsonrx13
Thanks, The bracket is made of stainless steel to... Sep 29 2008, 06:30 AM chris914
[quote name='chris914' post='1085341' date='Sep 2... Sep 29 2008, 10:42 PM watsonrx13
I can send you the AutoCAD file tomorrow if you w... Sep 30 2008, 06:08 AM Gint [quote name='watsonrx13' post='1085439' date='Sep ... Sep 30 2008, 05:29 PM Borderline When I bought my 40's they came with a similar... Sep 29 2008, 10:50 AM Joe Ricard Rob Watson you paid attention to my engine you wou... Sep 29 2008, 02:37 PM watsonrx13
Rob Watson you paid attention to my engine you wo... Sep 29 2008, 07:43 PM curt Hello All
Been lurking here a while and this subj... Oct 1 2008, 09:41 AM 9146986 Years ago there was a discussion about carb linkag... Oct 1 2008, 12:20 PM Mark Henry
Years ago there was a discussion about carb linka... Oct 1 2008, 02:19 PM Jake Raby I also carry the CSP unit and have a modified vers... Oct 1 2008, 12:33 PM chris914 Because it is a little longer I used a Terry cable... Oct 2 2008, 03:07 AM Racer Chris I have done a couple of installations using this l... Oct 2 2008, 08:15 AM chris914 That’s interesting. I take it that your link... Oct 2 2008, 12:12 PM Racer Chris
That’s interesting. I take it that your linkage... Oct 2 2008, 05:39 PM porsche914gt Jake, I cant find the linkage at the Type4 store.
... Oct 2 2008, 01:18 PM curt Chris914 and Racer Chris thanks for posting the ph... Oct 2 2008, 01:55 PM Mark Henry The CSP unit looks OK, But I'd still bend up m... Oct 2 2008, 02:27 PM |
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