what's the difference in these two engines?
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Honda-Tech Member
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From: pa, usa
what's the difference in these two engines?
i'm not that knowlegdeable in the k-series engines. what's the difference in the k24 in a 2003 cr-v and the k24 in the tsx that everyone goes for? i am pretty sure that there are differences in the ecu programing. but what about the internals of the engine?
Honda-Tech Member
Joined: Oct 2007
Posts: 818
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From: Gurnee, Illinois, America
Re: what's the difference in these two engines?
K24A1
Found in:
2002-2006 Honda CR-V
Displacement: 2,354 cc (143.6 cu in)
Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
Compression: 9.6:1
Power: 160 hp (120 kW) @ 6000 rpm
Torque: 162 ft·lbf (220 N·m) @ 5200 rpm
Redline: 6500 rpm
K24A2
Found in:
2004-2008 Acura TSX, JDM CL9 Accord Type-S, RB1 Odyssey Absolute
Displacement: 2,354 cc (143.6 cu in)
Power: 200 PS (150 kW; 200 hp) @ 6800 rpm
Torque: 232 N·m (171 lb·ft) @ 4500 rpm (166 lbft @ 4500 rpm U.S.)
Bore: 87 mm
Stroke: 99 mm
Compression: 10.5:1
Redline:
Automatic 7100 rpm
Sequential Sportshift 7300 rpm (7100 rpm U.S.)
Manual 7600 rpm (7100 rpm U.S.)
Note: The 2006-2008 K24A2 in the U.S. market Acura TSX has the following improvements[2]
Power: 205 hp @ 7000 rpm
Torque: 164 lbft @ 4500 rpm
Increased intake flow:
Intake valve + 1 mm oversize
Intake cam High lift lobe with 0.9 mm more lift and 12 degrees more duration
Throttle body increased from 60-64mm
Radius on some intake pipes increased from 70-80mm
Increased exhaust flow
Exhaust Head pipe increased frm 60-65mm
Higher flow catalytic converter
Main (single) exhaust pipe increased from 54-57mm
Rear (twin) pipes increased in diameter from 42.5 to 45mm
Block improvements:
Additional air passages in crankcase for reduced pumping losses
Other
Stronger conrods
New crankshaft with more counterbalance weight
Revised pistons with more valve-piston clearance
Found in:
2002-2006 Honda CR-V
Displacement: 2,354 cc (143.6 cu in)
Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
Compression: 9.6:1
Power: 160 hp (120 kW) @ 6000 rpm
Torque: 162 ft·lbf (220 N·m) @ 5200 rpm
Redline: 6500 rpm
K24A2
Found in:
2004-2008 Acura TSX, JDM CL9 Accord Type-S, RB1 Odyssey Absolute
Displacement: 2,354 cc (143.6 cu in)
Power: 200 PS (150 kW; 200 hp) @ 6800 rpm
Torque: 232 N·m (171 lb·ft) @ 4500 rpm (166 lbft @ 4500 rpm U.S.)
Bore: 87 mm
Stroke: 99 mm
Compression: 10.5:1
Redline:
Automatic 7100 rpm
Sequential Sportshift 7300 rpm (7100 rpm U.S.)
Manual 7600 rpm (7100 rpm U.S.)
Note: The 2006-2008 K24A2 in the U.S. market Acura TSX has the following improvements[2]
Power: 205 hp @ 7000 rpm
Torque: 164 lbft @ 4500 rpm
Increased intake flow:
Intake valve + 1 mm oversize
Intake cam High lift lobe with 0.9 mm more lift and 12 degrees more duration
Throttle body increased from 60-64mm
Radius on some intake pipes increased from 70-80mm
Increased exhaust flow
Exhaust Head pipe increased frm 60-65mm
Higher flow catalytic converter
Main (single) exhaust pipe increased from 54-57mm
Rear (twin) pipes increased in diameter from 42.5 to 45mm
Block improvements:
Additional air passages in crankcase for reduced pumping losses
Other
Stronger conrods
New crankshaft with more counterbalance weight
Revised pistons with more valve-piston clearance
pm4nudes
Joined: Jun 2008
Posts: 947
Likes: 0
From: Minneapolis, MN
Re: what's the difference in these two engines?
The a1 uses vtece and the a2 uses ivtec. ivtec uses 3 rockers and 2 cam profiles on both the intake and exhaust sides and vtece uses 2 rockers and cam profiles on the intake side and a single rocker and cam profile for the exhaust side. The a2 has oil squirters but they can be added to any block. The a1 block can take a k20a oil pump w/o modding like the other k24 blocks. The a2 had stronger rods than the a1 and also come with a higher cr factory.
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