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[Datsun 1200 encyclopedia]

Hitachi DCH340

(Difference between revisions)

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Printable version | Disclaimers | Privacy policy | Current revision
Category: Fuel System
Revision as of 14:07, 4 January 2012
ddgonzal (Talk | contribs)
(Hitachi DCH340 moved to Truncated HDCH340: truncated)
<- Previous diff		 Current revision
ddgonzal (Talk | contribs)

Line 1: Line 1:
-#REDIRECT [[Truncated HDCH340]]+The '''Hitachi DCH340''' series carburetor is larger than the stock Datsun 1200 [[Carburetor|Hitachi DCH306 carburetor]], yet runs smoother and makes more power than a [[Weber 32/36 Carburetor]]. They came as standard equipment on mid-to-late 1970s Datsun L-series engine, and Jet Kits for the A12 engine were available. It was first used on 1973 L16 and L18, and on all the L20Bs that followed.
 + 
 += Overview =
 +* [http://dimequarterly.tierranet.com/articles/tech_carb_tuning_guide.html Technical article comparing to Weber DGV and Hitachi DAF328 (L16) carburetors]
 +*: {{Archive|web.archive.org/web/20120701035254/http://dimequarterly.tierranet.com/articles/tech_carb_tuning_guide.html|old article}}
 +* [http://www.carburetorfactory.com/expvw29.html DCH340 parts diagram]
 +* [http://www.tercel4wd.com/forums/viewtopic.php?t=2826&sid=0100ee7c4579cbae2c61270a40f38b51 Tercel Swap DCH340]
 +*: "The car has never run better, pulls strong (even with the AC on)"
 + 
 +Most 510s used a Nikki carburetor. But the last North American 510s used Hitachi DCH340, the 1973 model. Most 1973-1980 L-series L18 & L20B used them, like 1978-1981 510, 1977-1979 200SX and pickups.
 + 
 +1980 USA version photos
 +<br>{{Upload|174_4d9fd4704eab3.jpg}} {{Upload|174_4d9fd47d86d2f.jpg}} {{Upload|174_4d9fd4894d535.jpg}}
 + 
 +1980 720 Pickup with L20B
 +<br>{{Upload|174_4d9fd66b16314.jpg}}
 + 
 +1977-1978 620 Pickup with L20B
 +<br>{{Upload|174_4d9fd797a2ec8.jpg}}
 + 
 +Jet Kit for A12 engine
 +<br>{{Album|15574}}
 + 
 +DCH340 retrofitted to A14 Engine
 +<br>{{Album|1992}}
 + 
 +parts breakdown
 +<br>{{Photo|DCH340.png|sightings/forum}}
 + 
 +Air Horn & air horn Gasket
 +<br>{{UploadPost|174_624b9308af667.jpg|496758}}
 + 
 += Airflow =
 + 
 + Venturis - total area
 + Weber 32/36: 26/27 - 1103
 + DCH340 L18 : 23/30 - 1122
 + DCH340 L20B: 24/31 - 1208
 + 
 += Jetting =
 + 
 + 1974 L18 DATSUN 620 TRUCK NORTH AMERICA
 + venturis: 23/30
 + Main jets: 100/170
 + Air bleeds: 60/60
 + Slow jets: 45/90
 + Slow bleeds: 145/100
 + Slow economizer: 1.8 mm
 + Power jet: 41
 + Float level: 23mm
 +
 + A12 CENTRAL TUNING KIT
 + venturis: unknown
 + Main jets: 115 or 117/155
 + Air bleeds: 60/60
 + Slow jets: 45/90
 + Slow bleeds: 140 or 150/100
 + Slow economizer: 180
 + Power jet: 48
 + ?: 120
 + 
 += Hitachi Carb Lineage =
 +Hitachi DCx Series
 +* better venturis than the DAF series it replaced
 +* vacuum operated secondaries
 +* Used on Datsuns and 1973-1976 Honda Civic 1200/1250
 +Models
 +* DCG286: 28 mm secondary bore - Datsun 1000, A10 engine
 +* DCA306: 1967-1969 520/521 with J13 engine (large bolt spacing)
 +* DCG306: 30 mm secondary bore - Datsun 1200, A12 engine, manual choke. Honda Civic.
 +* DCH306: 30 mm secondary bore - Datsun 1200, A12 engine, auto choke. Also used by A13, A14, A15
 +* DCR306: 1981-1982 A15, E15, E16
 +* DCH340: 34 mm secondary bore - Datsun 510, 610, 710, 620, 720. L16, L18
 +* DCH340 with high-speed enrichment system - L20B engine. Isuzu Chevrolet LUV
 +* DCR360: 1980 L20B, Z20
 +* DCR342: 1981 L20B, Z20 California, 1982 CA20 Stanza
 +* DCH342: 1981 L20B, Z20 non-California
 +* DCH328: 32 mm secondary bore -
 +* DCR384: 1983-1986 Z24 engine
 + 
 + 
 +DFx Series
 +* DFP306: 1981-1983 MPG Pulsur, MPG Sentra E15, E16
 +** Also Geo 1985-1986 M/T 1.0 liter
 +* DFC328: 1983 Pulsur, Sentra E15, E16
 +* DCZ328: 1983 Pulsur, Sentra E15, E16
 +* DFE2832: 1984-1985 Pulsur, Sentra E15, E16
 +* DFP384: 1983-1986 Z24 engine
 + 
 + 
 +Hitachi DAF series - Solex-style primary venturi
 +* DAF328 - Most L16
 +** Ford Courier
 +** Also 1987-1988 Ford Ranger 2.0 (Mazda engine)
 + 
 +[[Category:Fuel System]]{{End}}

Current revision

The Hitachi DCH340 series carburetor is larger than the stock Datsun 1200 Hitachi DCH306 carburetor, yet runs smoother and makes more power than a Weber 32/36 Carburetor. They came as standard equipment on mid-to-late 1970s Datsun L-series engine, and Jet Kits for the A12 engine were available. It was first used on 1973 L16 and L18, and on all the L20Bs that followed.

Contents

[edit]

Overview

Most 510s used a Nikki carburetor. But the last North American 510s used Hitachi DCH340, the 1973 model. Most 1973-1980 L-series L18 & L20B used them, like 1978-1981 510, 1977-1979 200SX and pickups.

1980 USA version photos
174_4d9fd4704eab3.jpgUpload click to view 174_4d9fd47d86d2f.jpgUpload click to view 174_4d9fd4894d535.jpgUpload click to view

1980 720 Pickup with L20B
174_4d9fd66b16314.jpgUpload click to view

1977-1978 620 Pickup with L20B
174_4d9fd797a2ec8.jpgUpload click to view

Jet Kit for A12 engine
15574.jpgAlbum 15574

DCH340 retrofitted to A14 Engine
1992.jpgAlbum 1992

parts breakdown
DCH340.png

Air Horn & air horn Gasket
174_624b9308af667.jpgPost 496758

[edit]

Airflow 

Venturis - total area
Weber 32/36: 26/27 - 1103
DCH340 L18 : 23/30 - 1122
DCH340 L20B: 24/31 - 1208
[edit]

Jetting 

1974 L18 DATSUN 620 TRUCK NORTH AMERICA 
venturis: 23/30
Main jets: 100/170
Air bleeds: 60/60
Slow jets: 45/90
Slow bleeds: 145/100
Slow economizer: 1.8 mm
Power jet: 41
Float level: 23mm

A12 CENTRAL TUNING KIT
venturis: unknown
Main jets: 115 or 117/155
Air bleeds: 60/60
Slow jets: 45/90
Slow bleeds: 140 or 150/100
Slow economizer: 180
Power jet: 48
?: 120
[edit]

Hitachi Carb Lineage

Hitachi DCx Series

  • better venturis than the DAF series it replaced
  • vacuum operated secondaries
  • Used on Datsuns and 1973-1976 Honda Civic 1200/1250

Models

  • DCG286: 28 mm secondary bore - Datsun 1000, A10 engine
  • DCA306: 1967-1969 520/521 with J13 engine (large bolt spacing)
  • DCG306: 30 mm secondary bore - Datsun 1200, A12 engine, manual choke. Honda Civic.
  • DCH306: 30 mm secondary bore - Datsun 1200, A12 engine, auto choke. Also used by A13, A14, A15
  • DCR306: 1981-1982 A15, E15, E16
  • DCH340: 34 mm secondary bore - Datsun 510, 610, 710, 620, 720. L16, L18
  • DCH340 with high-speed enrichment system - L20B engine. Isuzu Chevrolet LUV
  • DCR360: 1980 L20B, Z20
  • DCR342: 1981 L20B, Z20 California, 1982 CA20 Stanza
  • DCH342: 1981 L20B, Z20 non-California
  • DCH328: 32 mm secondary bore -
  • DCR384: 1983-1986 Z24 engine


DFx Series

  • DFP306: 1981-1983 MPG Pulsur, MPG Sentra E15, E16
    • Also Geo 1985-1986 M/T 1.0 liter
  • DFC328: 1983 Pulsur, Sentra E15, E16
  • DCZ328: 1983 Pulsur, Sentra E15, E16
  • DFE2832: 1984-1985 Pulsur, Sentra E15, E16
  • DFP384: 1983-1986 Z24 engine


Hitachi DAF series - Solex-style primary venturi

  • DAF328 - Most L16
    • Ford Courier
    • Also 1987-1988 Ford Ranger 2.0 (Mazda engine) 
¤

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