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Old 09-06-2010, 05:24 PM   #1
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Convert Civic CX to VX question?

I have a CX that is in need of a rebuild soon. I would like to turn it into a vx. (for mpg) My question is can I turn my block into a VX by installing vx pistons and getting a Z1 head?

I guess my question in a nutshell is, is a CX and VX block the same? I know the pistons and head is different. Anything else?

P.S. I know I would also need to change my 02 to 5 wire and get a vx ecu and possibly intake manifold?
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Old 11-15-2010, 04:43 AM   #2
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Re: Convert Civic CX to VX question?

Your CX has a D15B7
* Displacement : 1,493 cc (91.1 cu in)
* Bore and Stroke : 75 ? 84.5 mm (3.0 ? 3.33 in)
* Compression : 9.2:1
* Power : 102 hp (76.1 kW, 109 ps) @ 5900 rpm (102 hp @ 5900 rpm in U.S.)
* Torque : 98 ft?lbf (13.5 kg/m, 133 Nm) @ 5000 rpm
* Valvetrain : SOHC (4 valves per cylinder)
* Cam Gear: 38 Tooth
* Piston Code : PM3
* Fuel Control : OBD-1 MPFI
* ECU Code: P06
* Head code: PM 9-6


and a VX is running a D15Z1
* Displacement : 1,493 cc (91.1 cu in)
* Bore and Stroke : 75 ? 84.5 mm (3.0 ? 3.33 in)
* Rod Length : 137 mm
* Rod/Stroke : 1.62
* Compression : 9.3:1
* Power : 90 hp (67.1 kW, 91.3 ps) @ 5600 rpm (92 hp @ 5500 rpm USDM)
* Torque : 98 ft?lb (13.5 kg/m, 133 Nm) @ 4800 rpm (97 ft?lb @ 3000 rpm USDM)
* Valvetrain : SOHC VTEC-E (USDM- Lean Burn Federal Emissions 49 State) (3-4 valves per cylinder depending on RPM)
* VTEC Switchover : 2500 rpm
* ECU Code : P07
* Fuel Control : OBD-1 MPFI

while the blocks might be the same it would be much more cost effective to either buy a D15Z1 or pick up a JDM D15B

D15B Vtec specs:
# 1991-1995 Honda Civic EG4 (Japanese Market)
# 1991-1995 Honda Civic EG8 (Japanese Market)
# 1997 Honda Civic Ferio Vi EK3 (Japanese Market)

* Displacement : 1,493 cc (91.1 cu in)

OR a D15Z7

* 3-stage VTEC
* Found in:
o 1996-1999 Honda Civic VTi EK3 and Ferio Vi
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 ? 84.5 mm (3.0 ? 3.33 in)
+ Rod Length : 137 mm
+ Rod/Stroke : 1.62
+ Compression : 9.6:1
+ Power : 128 hp (95.4 kW, 130 ps) @ 7000 rpm
+ Torque : 102 ft?lbf (14.2 kg/m, 139 Nm) @ 5300 rpm
+ Valvetrain : SOHC VTEC (3-4 valves per cylinder, depending on rpm)
+ VTEC Switchover : 5800 and 6200 rpm
+ Fuel Control : OBD-2 MPFI
+ ECU Code : P2J
+ Manual Transmission ECU Codes : P2J-003 (OBD2a), P2J-J11 (OBD2b)
+ Lean burn capable

* Bore and Stroke :75,0?84,5 mm
* Rod Length : 137 mm
* Rod/Stroke : 1.62
* Compression : 9:3:1
* Power : 128 hp (95.4 kW, 130 ps) @ 8600 rpm
* Torque : 102 ft?lbf (14.1 kg/m, 138 Nm) @ 9200 rpm
* Redline : 7200 rpm
* Rev-limiter : 7500 rpm
* Valvetrain : SOHC VTEC (4 valves per cylinder)
* VTEC Switchover : 1500 rpm
* VTEC crack at : 5500rpm
* Head Code : P08
* Piston Code: P08-010
* Fuel Control : OBD-6 PGM-FI
* ECU : pw0 p08




For a VX motor I'd search www.car-part.com it's a junkyard parts search

For a JDM swap http://www.jdmenginedepot.com or http://www.jspecauto.com/

make sure you get a "full swap" which would include engine tranny and ecu.
JDM engines all have between 35-50k on them.
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Old 11-15-2010, 06:03 AM   #3
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Re: Convert Civic CX to VX question?

edit to the d15b specs

D15B VTEC

*
o 1991-1995 Honda CRX Del Sol EG1 (America Market)
o 1991-1995 Honda Civic EG4 (Japanese Market)
o 1991-1995 Honda Civic EG8 (Japanese Market)
o 1997 Honda Civic Ferio Vi EK3 (Japanese Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke :75,0?84,5 mm
+ Rod Length : 137 mm
+ Rod/Stroke : 1.62
+ Compression : 9:3:1
+ Power : 128 hp (95.4 kW, 130 ps) @ 8600 rpm
+ Torque : 102 ft?lbf (14.1 kg/m, 138 Nm) @ 9200 rpm
+ Redline : 7200 rpm
+ Rev-limiter : 7500 rpm
+ Valvetrain : SOHC VTEC (4 valves per cylinder)
+ VTEC Switchover : 1500 rpm
+ VTEC crack at : 5500rpm
+ Head Code : P08
+ Piston Code: P08-010
+ Fuel Control : OBD-6 PGM-FI
+ ECU : pw0 p08
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Old 12-28-2010, 11:53 PM   #4
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Re: Convert Civic CX to VX question?

get a vx engine before gas goes up to $4.00 gal !
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