Why is the new accord euro faster?

[armstrong]

hi all,
Just recently purchased a 2007 accord euro auto which holds 140kw.

One thing that got me curious thought is that the new 2011 model my parents have is the same 2.4 ivtec auto and it has 148kw.

does anyone know it these cars are the exact engine with a simple tune improvement? or did Honda actually make changes to the engine?

[Fredoops]

Different ECU tune, the new euro has the K24Z3, and old euro had the K24A3

and slightly modified engine parts.


http://forums.clubrsx.com/showthread.php?t=538266

[MR_LATE]

whoo Z4 :P jokes

just put a k&n filter in ur car. u get a WHOPPING +7 kw . then after u paint ur callipers red, an additional 25BHP!

[armstrong]

Different ECU tune, the new euro has the K24Z3, and old euro had the K24A3

and slightly modified engine parts.


http://forums.clubrsx.com/showthread.php?t=538266

thanks Fredoops for the reply.
Below are the specific engine comparisons from Fredoops link for everyone else to see


K24A3 - Drive-by-Wire™ Throttle System
Found on: 2003-2007 Honda Accord sedan (AUS, EU)
* Compression: 10.5:1
* Power: 190 hp /141kw @ 6800 rpm
* Torque: 165 lb-ft @ 4500 rpm
* Redline: 7100 rpm

-----------------------------------------------------------------
K24Z3 - Drive-by-Wire™ Throttle System
Note: radical exhaust port design. no exhaust manifold. will not mate up with other K series manifolds.

Found on: 2009+ Acura TSX
* Compression: 11.0:1
* Power: 201 hp/ 149 kw @ 7000 rpm
* Torque: Manual - 172 lb-ft @ 4300 rpm
............Automatic - 170 lb-ft @ 4300 rpm
* Redline: 7100 rpm

[MingZai]

whoo Z4 :P jokes

just put a k&n filter in ur car. u get a WHOPPING +7 kw . then after u paint ur callipers red, an additional 25BHP!

Dunno why I just that kind of sarcasm just grinds my gearss ahhhh
lool

@Armstrong
I still prefer the K24A3 ;P

[aaronng]

On the track when you line both cars up, the CL9 might beat the CU2 in a drag race. On a CL9, you can change the exhaust header too. Can't do that on CU2 as the 4-2 section its part of the head.

[natnat]

8kw extra... counter offset by the 200kg extra weight... there's no way a stock CU2 can beat a stock CL9.

[MR_LATE]

8kw extra... counter offset by the 200kg extra weight... there's no way a stock CU2 can beat a stock CL9.

depends on driver :S

Dunno why I just that kind of sarcasm just grinds my gearss ahhhh
lool

hehehe sorry

[I CU2]

depends on driver :S

Yes, if we have a 200kg man driving a CL9 and a ghost driving the CU2 (it's possible on mario kart alright!).

It may be a fair race. BRING IT ONNN.

[natnat]

and remember, 140kw / 148kw is the peak power at the crank.

the power delivery curve and torque number & torque curve play bigger roles in making a car fast.

[armstrong]

and remember, 140kw / 148kw is the peak power at the crank.

the power delivery curve and torque number & torque curve play bigger roles in making a car fast.

Yes, if we have a 200kg man driving a CL9 and a ghost driving the CU2 (it's possible on mario kart alright!).

It may be a fair race. BRING IT ONNN.

lmfao!! maybe because the CU2 comes with an actual sub they were considerate by giving an extra 8kw thinking it would slow the car down.

When it comes to drag racing a car to compare side by side it all depends on these factors:
*are you stupid enough to put E10 in your car?
*did you try to add fuel and oil additives to your car for better response?
*do you have the luxury model that has all the heavy fancy gizmos?
*are you racing with a full tank of fuel or 1/4 tank of fuel?
*are you a fat guy racing a euro against another euro driver that's a midget?
*did u cheat by removing ur spare tyre from the boot?

_________________________________
on a more serious note
the compression is much higher in the CU2, so i am "guessing" if you got the CU2 pistons & exhaust & headers into a CL9 and getting it tuned it might just match up. Of course you could never justify the cost in a project like this just to match a CU2.

if you got a standard CL9 & CU2 side by side it would be an interesting to see the results.

[Fredoops]

lmfao!! maybe because the CU2 comes with an actual sub they were considerate by giving an extra 8kw thinking it would slow the car down.

When it comes to drag racing a car to compare side by side it all depends on these factors:
*are you stupid enough to put E10 in your car?
*did you try to add fuel and oil additives to your car for better response?
*do you have the luxury model that has all the heavy fancy gizmos?
*are you racing with a full tank of fuel or 1/4 tank of fuel?
*are you a fat guy racing a euro against another euro driver that's a midget?
*did u cheat by removing ur spare tyre from the boot?

_________________________________
on a more serious note
the compression is much higher in the CU2, so im "guessing" if you got the CU2 pistons & exhaust & headers into a CL9 and getting it tuned it might just match up. You wont be able to justify the cost to do this just to match a CU2. You would be best to actually spend money on a proper performance upgrade if you have decided to get your engine pulled apart.

The compression ratio isn't all that much higher

Getting cu2 parts into CL9 will make it worse if anything

A CL9 with a Hondata ECU reflash by itself will match CU2's output