Honda Civic VTi-R vs Civic Type R Comparison

Australian VTi-R

Standard Specifications:
Model Variant VTi-R 
Car Series  EK4
Year 1995-1998
Doors and Body Style 3DR Hatch
Engine Size 1595cc B16A2
Fuel System MULTI POINT F/INJ 
Cylinders
Transmission 5M
Standard Features 15" Alloy Wheels, 4 Speaker Stereo, ABS (Antilock Brakes), Adjustable Steering Col. - Tilt & Reach, Air Conditioning, Airbags - Driver & Passenger (Dual), Central Locking, Engine Immobiliser, Paint - Metallic, Power Door Mirrors, Power Steering, Power Windows, Radio Cassette, Sunroof - Electric and Tilt, Suspension - Sports, Seats - Sport bucket, Centre Console with dual cup holder, Rear seat head restraints, Digital Clock
Optional Features


Available Colours Frost White (NH-538)
Milano Red (R-81)
Dark amethyst pearl (PB-74P)
Vogue silver metallic (NH-583M)
Cypress green pearl (G82P)
Bore and Stroke 81x87.2mm 
Power 118KW  / 160HP @7600rpm
Torque 148Nm / 15.1kgm @7000rpm
Weight to Power Ratio 7.71 : 1kg/kW 
Front Brakes Vented Discs, ABS
Rear Brakes Disc 
Wheel Dimension

195-55-15

Turning Circle 9.8m 
Compression Ratio 10.2 
Final Ratio 4.4 
Tank Capacity 45 litres 
Exterior Length 4180mm 
Exterior Width 1695mm 
Exterior Height 1375mm 
Front Track 1475mm 
Rear Track 1475mm 
Wheel Base 2620mm 
Front Suspension Ind; double wishbones with coil springs gas damper and stabiliser bars
Rear Suspension Ind; double wishbones with coil springs gas damper and stabiliser bars
Kerb Weight 1105kg 
Ground Clearance 106mm 
Seating Capacity
Exhaust Manifold Cast 4-2-1 style exhaust manifold
1/4 Mile time 16.2

Civic Type R

Standard Specifications:
Model Variant TYPE R 
Car Series  EK9
Year 1997 - 2001
Doors and Body Style 3DR Hatch
Engine Size 1595cc B16B Spec R
Fuel System MULTI POINT F/INJ 
Cylinders
Transmission 5M with LSD
Standard Features 15" Alloy Wheels, Rear Spoiler, Momo Steering Wheel, Recaros
Optional Features Central Locking, Power Windows, Power Mirrors, Power Steering, Radio Cassette with 4 Speakers, Dual Airbag Package, ABS



Cosmetics Leather wrapped MOMO Steering wheel with SRS airbag, Red Carpet, Red Arm rests, Red Floormats with Type R badging, Titanium gear shifter, Red stiched boot, Carbon centre dash console with Type R badge, Type R Instument cluster, Carbon dash bezel, Emergency Flare, No Coin holder, Red Recaro seats, Bodykit, Red exterior badging, Colour coded exterior panels
Bore and Stroke 81x87.2mm 
Power 136KW / 185PS @8200rpm
Torque 16.3kgm @7500rpm
Weight to Power Ratio 7.37 : 1kg/kW 
Front Brakes Larger Vented Disc , ABS (optional)
Rear Brakes Disc 
Wheel Dimension

195-55-15 Enkei 5 stud PCD

Turning Circle 9.8m 
Compression Ratio 10.8
Final Ratio 4.4
Tank Capacity 50litres 
Exterior Length 4185mm 
Exterior Width 1695mm 
Exterior Height 1360mm 
Front Track 1480mm 
Rear Track 1480mm 
Wheel Base 2620mm 
Front Suspension Ind; double wishbones with coil springs gas damper 
Rear Suspension Ind; double wishbones with coil springs gas damper and trailing link
Kerb Weight 1059kg (97 Spec) 1089kg (98 Spec)
Ground Clearance 105mm 
Seating Capacity
Exhaust Manifold 4-2-1 style stainless steel exhaust manifold
1/4 Mile time 15.5



Civic Type R Variations

The legendary EK Civic Type R was first introduced in late 1997. It arrived in the shadows of the already badged Type R of the Integra Type R and the NSX Type R. This EK has been at the forefront of an engineering marvel by producing a whopping 116horsepower per litre of its 1595cc naturally aspirated engine. But enough of the worshipping and lets look at the different types of cosmetic differences found in the EK Civic Type R mould.

August 1997
Civic Type R - Standard version

No power options - race trim

Weight 1059kg

September 1998
Civic Type R - Fully optioned version

Cosmetic change to front & rear bumpers, Design change in headlight shape, Power Mirrors, Power Windows, Power Steering, Radio Cassette with 4 Speakers (a double din stereo center console was also available), Dual Airbag Package, ABS.

Weight 1089kg

December 1999
Civic Type R - Type Rx

All features of the previous version including; Retractable electric door mirrors, Keyless entry unlock system, Aluminum sports pedals. 4 colours were available for sale.

Weight 1099kg



The Type R Comparison

Different pistons are responsible for the compression ratio increases between 160hp & 170hp B16A and the 10.8 ratio for B16B. Readily apparent is the relatively modest change in piston top between B16A 160hp and B16A 170hp for the 10.2 to 10.4 change. However, the radically different piston top for B16B is very clear from the picture. The increase in compression ratio between B16B from B16A is 0.4.

The cut-outs on the piston top to accomodate for valve lift are basically the same between all three piston. This means the B16B camshafts can be installed into both 160ps and 170ps B16A without the need to change to B16B pistons.

On B16B, the inlet ports are manually ported to increase air-flow. The exhaust ports are identical to B16A.
B16B intake valve seats are at a different angle to B16A, 45 degrees vs 60 degrees. The intake valves are also different, being lighter and having a thinner valve stem.


On the left are the power curves for B16A 170hp versus B16B. Note the big gain in power after 6000rpm, the VTEC switch-over point between mild and wild cam profiles. The gain at extreme high rpms is readily apparent on the curves.

Various individual specifications for B16B can teach us about the feasibility of various modifications to B16A. For eg, the throttle bore diameter for B16B is identical to B16A at 60mm. This means that enlarged throttle bodies for B16A might not be an optimal mod or that a compromise in power delivery might result, eg loss of low-end power in return for gain in high-end power. Note that B16B has identical low and mid range power as B16A.

As with B18C Spec R, the wonder of B16B is the assurance of a 15 to 25hp gain in power on a B16A provided the tuning done by Honda can be completely replicated. Nevertheless even if only a portion can be duplicated, combining with properly designed aftermarket exhaust, headers, and intake could still potentially realize this 15hp gain. B16B engine parts are available from Honda and with care, most of them can be used on B16A for good power gains.


The camshaft profiles (wild cam) change from B16A2 and B16B are :

Cam Profile B16A2 160ps JDM B16A 170ps B16B 98R
Max Lift (IN/EX) 10.4/9.4 10.7/9.4 11.5/10.5
Open Timing (IN/EX) BTDC 10/BTDC 40 BTDC 15/BBDC 40 BTDC 18/BBDC 45
Close Timing (IN/EX) ABDC 40/ATDC 5 ABDC 45/ATDC 7 BTDC 45/ATDC 10

In order to increase the power output by 15 hp, and the max RPM by 200RPM, the engine goes through many upgrades. It should be noted that the B18C spec.R's cylinder block is used for its endurance.


																

Information courtesy of Superhonda.com, Temple of VTEC and Tamotsu Horikoshi, translated by Kaz Mori

 
Courtesy - © 2004 dohc-vtec.com.au