OEM engine data of the J-spec BB1
 
   Engine code H22A (J-Spec)  
   Displacement 2156.8 cm3  
   Power 147 kW (197 HP / 200 PS) @ 6800 min-1  
   Torque 218.7 Nm (161.3 lb-ft) @ 5500 min-1  
   Top speed 255 km/h (158.4 mph) @ 7490 min-1   
   Volumetric efficiency (VE) @ peak HP 99% ?  
   Volumetric efficiency (VE) @ peak Torque 105% ?  
   0-100 km/h 6.9 s  
   Red-line 7400 min-1  
   Fuel cut-off / kick-in 7684 / 7500 min-1 (ECU values)  
   Fuel type min. 95 ROZ petrol  
   Transmission (M/T) M2A4 or M2B4 (LSD)  
       
   Block design closed deck; cylinder liners from fibre-reinforced metal (FRM); piston bottoms cooled with high-pressure oil squirters.  
   Compression ratio 10.6:1  
   Deck height 219.52 mm  
   Piston Down Bore @ TDC 0.15 mm  
   Head gasket thickness 0.66 mm  
   Cylinder bore 87.0 mm  
   Cylinder stroke 90.7 mm  
   Cylinder wall 7 mm  
   Rod length 143.00 mm  
   Rod/Stroke ratio 1.577:1  
   Piston compression height 31.00 mm  
   Piston (wrist) pin diameter 22 mm  
   Cylinder head chamber volume 52.9 cm3  
   Total combustion volume 56.2 cm3  
   Connecting rod big end width 23.75 mm  
   Connecting rod big end bore diameter 51 mm  
   Valve angles 29  
   Valve head diameter IN / EX 35 mm / 30 mm  
   IN / EX valve lift [Pri/Mid/Sec] [0.26"/0.45"/0.31"] / [0.24"/0.41"/0.30"] ?  
   IN / EX valve duration [Pri/Mid/Sec]
    NB: 0.05" timing base
[185/235/180] / [190/235/185] ?  
       
   Primary reduction direct 1:1  
   1st gear ratio 3.307  
   2nd gear ratio 1.950  
   3rd gear ratio 1.360  
   4th gear ratio 1.034  
   5th gear ratio (overdrive) 0.787  
   Reverse gear ratio 3.000  
   Final reduction 4.266  
       
   
  H22A 4WS Operation

TCS Operation

 


various OEM engine d
yno plots
 
   
  4th Prelude
H22A vs F22B
5th Prelude
SiR vs Type-S
6th Accord
SiR vs Sir-T
7th Accord
Euro-R
 


My Prelude's performance in year 2007 (without nitrous)

 
               
    Dyno Pull Results          
               
  Venue: J.P. Autotechnics Ltd.        
  Model: 250 whp rolling road, non-programmable, calibrated twice per year      
  Date: 15.09.2007 09:00          
  Ambient air: 14C, 103kPa, dry sunny (~70% relH.)        
    Gear: 4th          
               
    measured at wheels @ 7500 rpm calculated at flywheel @ 7500 rpm (15% loss)    
    measured BHP SAE corrected BHP PS / HP Nm (lb-ft)    
       1st Run 221 199 238 / 234 223 / 164    
       2nd Run 210 189 226 / 223 212 / 156    
       3rd Run 237 214 255 / 251 239 / 176    
       average 223 201 240 / 236 224 / 165    
               
     compare stock (see above dyno plot) 189 / 186 177 / 131