Difference between revisions of "Carburetors"

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== Carburetor Jetting ==
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= Carburetor Specs =
 +
 
 +
The carbureted SM has three Weber 42 DCNF carbs.
 +
 
 +
''On my 1972 they are the four-bolt version (not the five-bolt version)'' [[User:Brucem|Brucem]] 18:34, 1 October 2009 (UTC)
 +
 
 +
 
 +
= Carburetor Jetting =
  
 
{| border="1" cellpadding="5" cellspacing="0" align="center" class="wikitable sortable"
 
{| border="1" cellpadding="5" cellspacing="0" align="center" class="wikitable sortable"
Line 7: Line 14:
 
! Francais
 
! Francais
 
! Italian
 
! Italian
 +
! Count <br/> Quant.
 
! 42 DCNF 2 <br/> C114/1 <br/>From 100.000
 
! 42 DCNF 2 <br/> C114/1 <br/>From 100.000
 
! 42 DCNF 16 <br/>C114/1<br/>From 150.000
 
! 42 DCNF 16 <br/>C114/1<br/>From 150.000
Line 16: Line 24:
 
! 42 DCNF 44 <br/>AM 114/53/30
 
! 42 DCNF 44 <br/>AM 114/53/30
 
|-
 
|-
| Diffuser
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| Number of top cover bolts
 +
|
 +
|
 +
|
 +
| ''n/a''
 +
| 4
 +
| ?
 +
| 5
 +
| 5
 +
| 5
 +
| 5
 +
| 4
 +
| ?
 +
|-
 +
| Main Venturi
 
| Zerstäuber
 
| Zerstäuber
 
| Diffusor
 
| Diffusor
 
| Diffusore
 
| Diffusore
 +
| 2
 
| 32
 
| 32
 
| 32
 
| 32
Line 29: Line 52:
 
| 36
 
| 36
 
|-
 
|-
| ''???''
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| Aux Venturi
 
| Gemisch-Austrittsrohr
 
| Gemisch-Austrittsrohr
 
| Centeur de melange
 
| Centeur de melange
 
| Centatore
 
| Centatore
 +
| 2
 
| 3.5
 
| 3.5
 
| 3.5
 
| 3.5
Line 46: Line 70:
 
| Gicleur principal
 
| Gicleur principal
 
| Getto principale
 
| Getto principale
 +
| 2
 
| 1.3
 
| 1.3
 
| 1.3
 
| 1.3
Line 58: Line 83:
 
| Mischrohr
 
| Mischrohr
 
| Tube d emulsion
 
| Tube d emulsion
| Getto emulsionatore
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| Emulsionatore
 +
| 2
 
| F25
 
| F25
 
| F25
 
| F25
Line 68: Line 94:
 
| A25
 
| A25
 
|-
 
|-
| Air Corrector
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| Air Corrector Jet
 
| Luftkorrekturdüse
 
| Luftkorrekturdüse
 
| Calibreur d air d automaticite
 
| Calibreur d air d automaticite
| Getto aria di freno
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| Correttore Getto d'Aria
 +
| 2
 
| 1.8
 
| 1.8
 
| 1.8
 
| 1.8
Line 82: Line 109:
 
|-
 
|-
 
| Idle Jet
 
| Idle Jet
| Leelaufdüse
+
| Leerlaufdüse
 
| Gicleur de ralenti
 
| Gicleur de ralenti
 
| Getto minimo
 
| Getto minimo
 +
| 2
 
| 0.5
 
| 0.5
 
| 0.45
 
| 0.45
Line 94: Line 122:
 
| 0.65
 
| 0.65
 
|-
 
|-
| Accelerator Jet
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| Accelerator Pump Jet
 
| Düse Beschleunigerpumpe
 
| Düse Beschleunigerpumpe
 
| Injecteur de pompe
 
| Injecteur de pompe
| Getto Pompa
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| Getto Pompa Acceleratore
 +
| 1
 
| 0.4
 
| 0.4
 
| 0.4
 
| 0.4
Line 107: Line 136:
 
| 0.4
 
| 0.4
 
|-
 
|-
| Starter Jet?
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| Starter Jet
| Startedüse
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| Starterdüse
 
| Gicleur de reprise
 
| Gicleur de reprise
 
| Getto avviamento
 
| Getto avviamento
 +
| 2
 
| F7/80
 
| F7/80
 
| F7/80
 
| F7/80
Line 123: Line 153:
 
| Schwimmernadelventil
 
| Schwimmernadelventil
 
| Pointeau
 
| Pointeau
| Valvo a Spillo
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| Valvola a farfalla
 +
| 1
 
| 1.75
 
| 1.75
 
| 1.75
 
| 1.75
Line 136: Line 167:
 
| Beschleunigerpumpe
 
| Beschleunigerpumpe
 
|  
 
|  
|  
+
| Pompa Acceleratore
 +
| 1
 
| 1
 
| 1
 
| 1
 
| 1
 
| 1
 
| 1
|-
 
| Idle Air Corrector
 
| Lerlaufluftdüse
 
| Calibreur d air de ralenti
 
 
|  
 
|  
 
|  
 
|  
 
|  
 
|  
 
|  
 
|  
| 1.3
 
| 1.35
 
| 1.35
 
 
|  
 
|  
| 1.35
 
 
|-
 
|-
| Starter Jet?
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| Idle Air Nozzle
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| Leerlaufluftdüse
 +
|
 +
| Calibreur d air de ralenti
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| ''2?''
 
|  
 
|  
| Gicleur de Starter
 
 
|  
 
|  
 
|  
 
|  
 +
| 1.3
 +
| 1.35
 +
| 1.35
 
|  
 
|  
|  
+
| 1.35
| 110/F7
 
 
|-
 
|-
| Check valve
 
| Rückschlagventil Besch.
 
| Clapet de pompe de reprise
 
| Valvola mandate pompa
 
|
 
|
 
|
 
| 1
 
| 1
 
| 1
 
| 1
 
| 1
 
 
|}
 
|}
  
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= Carburetor Types =
 +
 +
Picture of four-screw carb gasket [[Image:Weber four-screw top cover gasket.jpg|left|100x100px|border]]
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<br clear="all"/>
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Picture of five-screw carb gasket [[Image:Weber five-screw top cover gasket.jpg|left|100x100px|border]]
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<br clear="all"/>
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 +
= Weber Carburetor Parts Sources =
 +
''Jets, parts, manuals''
 +
 +
* If you're looking for jets, tools, other parts...consider [http://www.piercemanifolds.com Pierce Manifolds] in Gilroy (California). They have most parts.
 +
 +
* Rebuild kits (for the four-bolt) are available cheaply here: http://www.webercarbsdirect.com/product_p/92.1094.05.htm
 +
 +
''As of 10/09 he had 24 kits in stock. Obviously you need three per car.'' [[User:Brucem|Brucem]] 18:34, 1 October 2009 (UTC)
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 +
* http://stores.ebay.com/ALFA1750S-CARBURETORS-PARTS-STORE
  
 
[[Category:Fuel_System]]
 
[[Category:Fuel_System]]
 
[[Category:History]]
 
[[Category:History]]

Latest revision as of 06:10, 24 November 2010

Carburetor Specs

The carbureted SM has three Weber 42 DCNF carbs.

On my 1972 they are the four-bolt version (not the five-bolt version) Brucem 18:34, 1 October 2009 (UTC)


Carburetor Jetting

English German Francais Italian Count
Quant.
42 DCNF 2
C114/1
From 100.000
42 DCNF 16
C114/1
From 150.000
42 DCNF 2/M
C114/1
From 200.000
42 DCNF 26/2
C114/11
From 350.000
42 DCNF 26M/2
C114/12
From 400.000
42 DCNF 30
C114/13
From 450.000
42 DCNF 31-32
Merak 3L
42 DCNF 44
AM 114/53/30
Number of top cover bolts n/a 4 ? 5 5 5 5 4 ?
Main Venturi Zerstäuber Diffusor Diffusore 2 32 32 32 36 36 36 36 36
Aux Venturi Gemisch-Austrittsrohr Centeur de melange Centatore 2 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5
Main Jet Hauptdüse Gicleur principal Getto principale 2 1.3 1.3 1.25 1.4 1.4 1.4 1.4 1.4
Emulsion Tube Mischrohr Tube d emulsion Emulsionatore 2 F25 F25 F25 F25 F25 F25 F25 A25
Air Corrector Jet Luftkorrekturdüse Calibreur d air d automaticite Correttore Getto d'Aria 2 1.8 1.8 1.8 1.7 1.7 1.7 1.6 135
Idle Jet Leerlaufdüse Gicleur de ralenti Getto minimo 2 0.5 0.45 0.5 0.6 0.6 0.7 0.6 0.65
Accelerator Pump Jet Düse Beschleunigerpumpe Injecteur de pompe Getto Pompa Acceleratore 1 0.4 0.4 0.4 0.5 0.5 0.5 0.4 0.4
Starter Jet Starterdüse Gicleur de reprise Getto avviamento 2 F7/80 F7/80 F7/80 F7/80 F7/80 F7/80 F7/80 110/F7
Float Needle Valve Schwimmernadelventil Pointeau Valvola a farfalla 1 1.75 1.75 1.75 2 2 2 2 2
Accelerator Pump Beschleunigerpumpe Pompa Acceleratore 1 1 1 1
Idle Air Nozzle Leerlaufluftdüse Calibreur d air de ralenti 2? 1.3 1.35 1.35 1.35

Carburetor Types

Picture of four-screw carb gasket

Weber four-screw top cover gasket.jpg


Picture of five-screw carb gasket

Weber five-screw top cover gasket.jpg


Weber Carburetor Parts Sources

Jets, parts, manuals

  • If you're looking for jets, tools, other parts...consider Pierce Manifolds in Gilroy (California). They have most parts.

As of 10/09 he had 24 kits in stock. Obviously you need three per car. Brucem 18:34, 1 October 2009 (UTC)