dual carbs or fuel injection

[quadboy2002]

i just bought my motor for my hatch i ended up going with the d15b i came with dual carbs and i wanna know what will give me more power the dual carbs or my dpfi any help is greatly appreciated

 

[humblegumbo]

Stick w/ the carbs unless you are prepared to switch over to OBD-1 or OBD-2 & Vtech.

What you have is the D15B4. To make the swap, you'd need the head, intake, harness, ECU...and probably few other components from the Jap-spec D15 from a '91 thru '99 Civic VTi.

Good luck.

 

[K2e2vin]

DPFI sucks. Stick with carbs or go MPFI.

 

[hatchbros 93]

im just curious as to why you choose that perticular motor?

 

[jlicrx]

im just curious as to why you choose that perticular motor?

i doubt that he actually chose that motor - he probably ordered a JDM D15B thinking he was getting the OBD1 SOHC VTEC 128hp model - a lot of people don't know that there are a about half dozen different JDM D15B SOHC engines, the OBD0 98hp dual carbed, the OBD0 108hp MPFI, the OBD1 128hp VTEC, the OBD1 92hp VTEC-E (like a D15Z1) and the OBD2 128 hp 3-stage VTEC (could be more, but these are the ones i personally have seen) - unless you know specifically what you want and what to look for when buying it, you could end up with any of the above unless you tell the people you are buying it from exactly what you want - all of these engines just say D15B on the block

 

[humblegumbo]

You are correct sir!
As you can see, most of these puppies only make 60-70 hp, except for the vtech motors which pumps up to 130. The only one w/ dual carbs is the B4, and she's spitting out 100hp.

So, he could swap out his top end for a more modern version, and actually *drop* like 20 - 30 horses. WTF?

From: Honda D engine - Wikipedia, the free encyclopedia

D15 Series Engines (1.5 Liters)
D15B

• VTEC
• Found in:
  • 1991-1999 Honda Civic VTi EG4 (Japanese Market)
    • Displacement : 1493 cm3
    • Bore and Stroke : 75 mm X 84.5 mm
    • Rod Length : 137 mm
    • Compression : 9.3:1
    • Power : 130 hp @ 6800 rpm & 102 ft·lbf @ 5200 rpm
    • Redline : 7200 rpm
    • Fuel Cut : 7411 rpm
    • Valvetrain : SOHC VTEC
    • Fuel Control : OBD-1 MPFI

D15B (with 3 stage VTEC)

• 3-stage VTEC
• Found in:
  • 1996-1999 Honda Civic VTi EK3 and Ferio VTi
    • Displacement : 1493 cm3
    • Bore and Stroke : 75 mm X 84.5 mm
    • Rod Length : 137 mm
    • Compression : 9.3:1
    • Power : 130 hp @ 6800 rpm & 102 ft·lbf @ 5200 rpm
    • Valvetrain : SOHC VTEC
    • Fuel Control : OBD-2 MPFI

D15B1

(Same as the D15B2 engine, but with a mild camshaft, and a restrictor plate between the throttle body and intake header)

• Found in:
  • 1988-1991 Honda Civic Hatchback
    • Displacement : 1493 cm3
    • Bore and stroke : 75 mm X 84.5 mm
    • Compression : 9.2:1
    • Power : 70 hp @ 5500 rpm & 83 ft·lbf @ 3000 rpm
    • Valvetrain : SOHC (4 valves per cylinder)
    • Fuel Control : OBD-O DPFI

D15B2

• Found in:
  • 1988-1991 Honda Civic DX/DLX
  • 1988-1991 Honda CRX DX
  • 1992-1995 Honda Civic LSi Hatch/Saloon (European Market)
    • Displacement : 1493 cm3
    • Bore and stroke : 75 mm X 84.5 mm
    • Compression : 9.2:1
    • Power : 90 hp @ 6000 rpm & 119 Nm @ 4500 rpm
    • Valvetrain : SOHC (4 valves per cylinder)
    • Fuel Control : OBD-O DPFI

D15B4

• Found in:
  • 1989-1991 Honda Civic GL (Australian Market)
    • Displacement : 1493 cm3
    • Bore and stroke : 75mm X 84.5 mm
    • Compression : 9.2:1
    • Power : 100 hp @ 6000rpm & 122 Nm @ 4500 rpm
    • Valvetrain : SOHC (2-4 valves per cylinder, depending on year)
    • Fuel Control : Dual Carburettor

D15B6

• Found in:
  • 1988-1991 Honda CRX HFx
    • Displacement : 1493 cm3
    • Bore and Stroke : 75 mm X 84.5 mm
    • Compression : 9.1:1
    • Power : 62 hp(88-89) 70 hp(90-91)@ 4500 & 83 ft·lbf @ 3000 rpm
    • Valvetrain : SOHC (2 valves per cylinder)
    • Fuel Control : OBD-0 MPFI

D15B7

• Found in:
  • 1992-1995 Honda Civic CX (Canadian model)
  • 1992-1995 Honda Civic DX/LX
  • 1993-1995 Honda Civic del Sol S
  • 1992-1995 Honda Civic LSi Coupe (European Market)
    • Displacement : 1493 cm3
    • Bore and Stroke : 75 mm X 84.5 mm
    • Compression : 9.2:1
    • Power : 102 hp @ 5900 rpm & 98 ft·lbf @ 5000 rpm
    • Valvetrain : SOHC (4 valves per cylinder)
    • Fuel Control : OBD-1 MPFI

D15B8

• Found in:
  • 1992-1995 Honda Civic CX (U.S. model)
    • Displacement : 1493 cm3
    • Bore and Stroke : 75 mm X 84.5 mm
    • Compression : 9.1:1
    • Power : 70 hp @ 4500 rpm & 83 ft·lbf @ 3000 rpm
    • Valvetrain : SOHC (2 valves per cylinder)
    • Fuel Control : OBD-1 MPFI

 

[jlicrx]

i believe that the engine he has is not a D15B4 but is a D15B from a JDM 88-91 Civic 5 door shuttle 55X, although they are identical - the JDM just doesn't say D15B4 - the dual carb JDM D15B engine is basically the same as the USDM D15B2 DPFI engine, just has carbs - it is 98hp - swapping the MPFI intake manifold, injectors, throttle body, etc. gives you about the same engine as swapping the MPFI onto a DPFI DX/LX - we have swapped a few of these engines into DX models using the DPFI - you need to make a block-off plate to cover the hole in the back of the head where the mechanical fuel pump is located