k20a3 into a 91 integra help!!!
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Joined: Mar 2007
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just a little bit of RESEARCH turned this up on k20a.org. check out the rating difference between the two.
K20A2
Found in:
2002-2004 Acura RSX Type-S and 2002-2005 Honda Civic Type R (EP, European)
Displacement: 1998 cc
Compression: 11.0:1
Power: 200 hp (147 kW) @ 7400 rpm
Torque: 142 ft·lbf (193 N·m) @ 6000 rpm
Redline: 8200 rpm
K20A3
Found in:
2002-2005 Honda Civic Si
Displacement: 1998 cc
Compression: 9.8:1
Power: 155 hp* (119 kW) @ 6500 rpm
Torque: 139
2002-2006 Acura RSX
Displacement: 1998 cc
Compression: 9.8:1
Power: 155 hp* (119 kW) @ 6500 rpm
Torque: 139 ft·lbf* (191 N·m) @ 4000 rpm
Redline: 6800 rpm
(* Horsepower and torque calculations reflect new SAE J1349 procedures revised August 2004)
K20A2
Found in:
2002-2004 Acura RSX Type-S and 2002-2005 Honda Civic Type R (EP, European)
Displacement: 1998 cc
Compression: 11.0:1
Power: 200 hp (147 kW) @ 7400 rpm
Torque: 142 ft·lbf (193 N·m) @ 6000 rpm
Redline: 8200 rpm
K20A3
Found in:
2002-2005 Honda Civic Si
Displacement: 1998 cc
Compression: 9.8:1
Power: 155 hp* (119 kW) @ 6500 rpm
Torque: 139
2002-2006 Acura RSX
Displacement: 1998 cc
Compression: 9.8:1
Power: 155 hp* (119 kW) @ 6500 rpm
Torque: 139 ft·lbf* (191 N·m) @ 4000 rpm
Redline: 6800 rpm
(* Horsepower and torque calculations reflect new SAE J1349 procedures revised August 2004)
You SAE corrected the K20a3 but not the K20a2. More like 195hp I think.
And BTW if you look at the tq between the two motors, there is not a whole lot of diff......tq does count.
Last edited by ZCCRX; Dec 20, 2007 at 09:56 PM.
Connoisseur of mintyness.
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It's basically because the a3's bottom end is a little less stable than the a2's. The a2 has a crank balancer and oil squirters that help protect it at high rpms. However there are several on ephatch that run there a3's at 8 grand with k-pro and do fine with it. I would probably run it at 7600rpms if I got k-pro, just to be safe on stock internals. Basically the a2's extra hp is derived from it's ability to rev a little higher. Like I said earlier the tq is almost the same, and as it goes, hp is derived from tq x rpms.
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no the bottom end is fine, its all in the cams.. switching the rockers and cams out along with kpro will net results close to k20a2 motor. The cranks are same stroke but alittle weaker than the k20a2
__________________
9.81@ 155 - turbo street B18 retired SOLD
9.91@ 144 - turbo street 10.94@ 137 225 50 bfg stock block
9.10@169 - turbo street 24.5 mt
9.38@ 144 all motor
8.76@ 176 outlaw street
www.clutchmasters.com
www.tempestracing.net
9.81@ 155 - turbo street B18 retired SOLD
9.91@ 144 - turbo street 10.94@ 137 225 50 bfg stock block
9.10@169 - turbo street 24.5 mt
9.38@ 144 all motor
8.76@ 176 outlaw street
www.clutchmasters.com
www.tempestracing.net
Connoisseur of mintyness.
Joined: Mar 2007
Posts: 111
Likes: 0
The cam's and rockers, yes obviously, and if you switch out the parts, you will see similar numbers to that of the a2. I assumed he was asking why Honda limited the rpms on the a3. The bottom end is not fine and it's not because the a2's crank is physically stronger, it's a balancing and lubrication issue at high rpm's between the two motors. That is why Honda did it that way.
Registered User
Joined: May 2006
Posts: 587
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I know what he was asking. I was answering the statement in regards to getting a new motor, when that block will be fine. And I never stated the crank was the reason Just stated it was different/weaker. Balancing and oil issues arnt it either
thats like saying u cant rev a stock lsbotom to 8500 cuz it stock redline is 7200 or whatever it is.
__________________
9.81@ 155 - turbo street B18 retired SOLD
9.91@ 144 - turbo street 10.94@ 137 225 50 bfg stock block
9.10@169 - turbo street 24.5 mt
9.38@ 144 all motor
8.76@ 176 outlaw street
www.clutchmasters.com
www.tempestracing.net
9.81@ 155 - turbo street B18 retired SOLD
9.91@ 144 - turbo street 10.94@ 137 225 50 bfg stock block
9.10@169 - turbo street 24.5 mt
9.38@ 144 all motor
8.76@ 176 outlaw street
www.clutchmasters.com
www.tempestracing.net
Registered User
Joined: May 2006
Posts: 587
Likes: 0
everything
__________________
9.81@ 155 - turbo street B18 retired SOLD
9.91@ 144 - turbo street 10.94@ 137 225 50 bfg stock block
9.10@169 - turbo street 24.5 mt
9.38@ 144 all motor
8.76@ 176 outlaw street
www.clutchmasters.com
www.tempestracing.net
9.81@ 155 - turbo street B18 retired SOLD
9.91@ 144 - turbo street 10.94@ 137 225 50 bfg stock block
9.10@169 - turbo street 24.5 mt
9.38@ 144 all motor
8.76@ 176 outlaw street
www.clutchmasters.com
www.tempestracing.net
