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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 14:08, 4 January 2012
ddgonzal (Talk | contribs)

<- Previous diff		 Current revision
ddgonzal (Talk | contribs)

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-[[Category:Fuel System]] 
- 
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. 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)"
-[http://datsun1200.com/modules/myalbum/photo.php?lid=15574 http://ddgonzal.members.winisp.net/getThumb.aspx?width=220&uri=http://datsun1200.com/modules/myalbum/photos/15574.jpg] A12 Jet Kit+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}}
-[http://datsun1200.com/modules/myalbum/photo.php?lid=1992 http://ddgonzal.members.winisp.net/getThumb.aspx?width=220&uri=http://datsun1200.com/modules/myalbum/photos/1992.jpg] DCH340 on A14 Engine+1980 720 Pickup with L20B
 +<br>{{Upload|174_4d9fd66b16314.jpg}}
 +1977-1978 620 Pickup with L20B
 +<br>{{Upload|174_4d9fd797a2ec8.jpg}}
-* [http://dimequarterly.tierranet.com/articles/tech_carb_tuning_guide.html Technical article comparing to Weber DGV and Hitachi DAF328 (L16) carburetors]+Jet Kit for A12 engine
-* [http://www.carburetorfactory.com/expvw29.html DCH340 parts diagram]+<br>{{Album|15574}}
-* [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"+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 = = Airflow =
Line 23: Line 38:
DCH340 L20B: 24/31 - 1208 DCH340 L20B: 24/31 - 1208
-= Hitachi Carb Lineage =+= 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 Hitachi DCx Series
* better venturis than the DAF series it replaced * better venturis than the DAF series it replaced
Line 31: Line 67:
Models Models
* DCG286: 28 mm secondary bore - Datsun 1000, A10 engine * DCG286: 28 mm secondary bore - Datsun 1000, A10 engine
-* DCA306: 1967-1969 520 with J13 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. * 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 * DCH306: 30 mm secondary bore - Datsun 1200, A12 engine, auto choke. Also used by A13, A14, A15
Line 57: Line 93:
** Ford Courier ** Ford Courier
** Also 1987-1988 Ford Ranger 2.0 (Mazda engine) ** 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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