b16a/b18c sr20det 2jzgte ej205 4g63 srt4
b18a/b18b ka24de 2jzge ej257 4g63 EVO VIII
h22/h22a vq35de 7mgte 4g63 EVO IX
k20a/k20z tb48
k20a3/k24a
f20c/f22c



The newest engine in the Honda tuning community. The "K Series" is Honda's mass produced version of the roller rocker valve train assembly found in the S2000. Less friction, more rpm potential, faster action cam profiles...this engine has untapped potential. First introduced in the JDM Integra Type-R in 2001, this engine put out a respectable 220HP @ 8000 rpm straight from the factory (DC5). The K20A also sees service in the JDM Civic Type-R, using the same compression and cam profiles. The first USDM production model was the K20A2 found in the 02-04 RSX-S. Other engines featuring the same head configuration include the K24A2 (TSX) that features a 9.114" deck height, the K20Z1 in the 05-06 RSX-S that includes various JDM Type-R add-ons like cams, throttle bodies, higher compression and Honda's answer to the tuning crowd, the K20Z3 found in the 2006-up Civic Si.

Stage Description Cam # Adv. Dur. Dur @ .050 Lift (in) Lift (mm) Kit # Dyno
Forced Induction Specification
Short duration profile builds cylinder pressure by reducing overlap, high lift for more air intake. Requires kit BC0040
or BC0040S.		 BC0041

296°/300°
248°/248°
245°/245°		 222°/224°
182°/182°
182°/182°		 .520"/.497"
.367"/.367"
.325"/.325"		 13.21/12.62
9.32/9.32
8.25/8.25		 BC0040
or
BC0040S
Normally Aspirated Specification
Hot street/strip or road race spec. Use with CAI, H, E, ECU, A/F mods. Excellent street manners and idle quality. Requires kit BC0040 or BC0040S.		 BC0042

304°/300°
252°/252°
246°/246°		 234°/228°
186°/186°
178°/178°		 .525"/.472"
.357"/.357"
.313"/.313"		 13.34/11.99
9.07/9.07
7.95/7.95		 BC0040
or
BC0040S
Normally Aspirated Specification
Intended for fully built engine. Extensive modifications,
high compression pistons. Also works on K24 all motor.
Requires kit BC0040 or BC0040S.		 BC0043

314°/310°
256°/256°
250°/250°		 244°/240°
190°/190°
184°/184° 		.525"/.518"
.369"/.369"
.323"/.323"		 13.34/13.15
9.37/9.37
8.20/8.20		 BC0040
or
BC0040S
USDM K20A2 (RSX-S) Stock 302°/305° 219°/215° .483"/.431" 12.27/10.95
USDM K24A2 (TSX) Stock 310°/302° 210°/212° .451"/.453" 11.45/11.50
JDM K20A (DC5) Stock 320°/318° 224°/219° .483"/.424" 12.27/10.77


Rocker Ratio: 1.75:1 mid, 1.7:1 sec, 1.7:1 pri.
No valve timing events due to variable intake cam.


VALVE SPRING/RETAINER KIT
Designed for high rpm, BC valve springs are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. Use steel retainer for high mileage applications.
Kit # Spring # Retainer # Seat # Description
BC0040 BC1040 BC2010 BC2904 Dual spring, titanium retainer/seat
BC0040S BC1040 BC2011 BC2904 Dual spring, steel retainer/seat
BC0040X BC1040 BC2010 No Seat Dual spring, titanium retainer
BC0040SX BC1040 BC2011 No Seat Dual spring, steel retainer
 
Spring Pressure:
BC1040 Seat: 1.590" @ 80 lbs / Open: 1.110" @ 250 lbs / Coil Bind: 1.030" (no machine work required)
STAINLESS STEEL VALVES
BC valves are made from premium stainless steel, fully machined and swirl polished for ultimate air flow. Dished head for added weight savings and increased valve control at high rpm. Standard and oversize head.
Part # Description #
BC3040 35.0mm Intake (standard head diameter)
BC3041 30.0mm Exhaust (standard head diameter)
BC3042 35.5mm Intake (+.5mm head diameter)
BC3043 30.5mm Exhaust (+.5mm head diameter)
BC3044 36.0mm Intake (+1mm head diameter)
BC3045 31.0mm Exhaust (+1mm head diameter)
K20A/K20Z 2.35L STROKER KIT
K24 BLOCK 2.6L
BC 4340 billet steel crankshaft (102mm stroke K24 / 92mm stroke K20).
BC 4340 Pro Series custom steel billet rods w/ARP2000 bolts (.935" BE width).
CP aluminum forged pistons (any bore size, any compression ratio).
5100 Series carbon steel alloy wrist pins. 9310 pin upgrade available.
Ductile iron plasma top rings, tapered second ring, low tension oil rings.
High strength ACL Race Series bearings included.
Fully system balanced and ready to install. (50% deposit required)

Kit # Crank # Rod # Piston # Bearing # Desc.
BC0044 BC5048 BC6058 BC7048 BC4020 92mm w/LW rods
BC0045 BC5048 BC6048 BC7048 BC4020 92mm w/heavy duty rods
BC0048 BC5049 BC6059 BC7049 BC4020 102mm w/LW rod
BC0049 BC5049 BC6049 BC7049 BC4020 102mm w/heavy duty rods

The BC stroker kit for the Honda/Acura K Series engine platform incorporates the wider B16A bearing (.935" width) that offers more surface area than the .740" width bearing found in the OEM K Series crank and rod combination. The added surface area increases bearing life, especially at extended rpm. Note: This kit requires custom connecting rods (modified BE bore and BE width).
Stock Specifications:
K20A/Z 86mm Bore x 86mm Stroke - 8.350" Block Height
K24A 87mm Bore x 99mm Stroke - 9.114" Block Height
619.825.8719 ph
619.825.9675 fx
 Some products listed are not legal for sale or use on emission controlled motor vehicles,
RPM ranges vary on application. Warranty Information
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