curious about the HP diiferances between the 04 TSX and the 04 Accord 4cyl

I see they have this in common: 16-valve, DOHC, 2.4-liter, i-VTEC 4-cylinder

And I see they have these differances:
TSX: peak HP @ 6800 rpm
Accord: peak HP @ 5500 rpm

TSX: compression 10.5:1
Accord compression 9.7:1

But can you guys tell me what physically/specifically seperates the 2 engines? Is there some differant piece or part? Or is it just software?


thanks

 

04 TSX
Engine Type
Aluminum Alloy in-line 4-cylinder

Displacement (liters)
2.4

Horsepower (SAE net)
200-hp @ 6800 rpm

Torque
166 lbs-ft @ 4500 rpm

Valvetrain
16-Valve, DOHC, i-VTECTM

Redline
7100 rpm

Compression Ratio
10.5:1

Fuel System
PGM-FI Multi-Point Injection

Injection System
Electronic Direct

Throttle Control
Drive-by-Wire Throttle System

Emission System
LEV-2

Cooling System Capacity
Manual: 5.4 U.S. quarts (5.3 liters)
Automatic: 7.4 U.S. quarts (7.3 liters)

Crankcase Refill Capacity, including filter
4.2 U.S. quarts (4.0 liters)

TSX Automatic
5-Speed Automatic with Sequential SportShift,(TM) Grade Logic Control and Lockup Torque Converter
TSX Manual
Optional: Close Ratio 6-Speed Manual with Magnesium Transmission Case


Gear Ratios

TSX Automatic TSX Manual





1st

2.652 3.267





2nd

1.517 1.880





3rd

1.082 1.355





4th

0.773 1.028





5th

0.566 0.825





6th

0.659





Reverse

2.000 3.583





Final Drive

4.440 4.760



04 accord

Engine Type
In-Line 4-Cylinder

Engine Block/Cylinder Head
Aluminum-Alloy

Displacement (cc)
2354

Horsepower @ rpm (SAE net)
160 @ 5500

Torque (lb.-ft. @ rpm)
161@4500

Bore and Stroke (mm)
87.0 x 99.0

Compression Ratio
9.7 : 1

Valve Train
16-Valve DOHC i-VTEC®

Multi-Point Fuel Injection
yes

Direct Ignition System with Immobilizer
yes

5-Speed Manual Transmission
5-Speed Automatic Transmission (available)

Well i hope that helped a little....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shawnd &raquo;</TD></TR><TR><TD CLASS="quote">But can you guys tell me what physically/specifically seperates the 2 engines? Is there some differant piece or part? Or is it just software?</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shawnd &raquo;</TD></TR><TR><TD CLASS="quote">TSX: compression 10.5:1
Accord compression 9.7:1</TD></TR></TABLE>Well, there's one hardware difference right there.

I'd guess the camshafts & the software are also different?

 

How does the compression differance imply differant hardware? (obviously, I'm not a car-guy)
thanks

 

Compression RATIO comes from the volume of the combustion chamber when the piston is at the top of the stroke. To increase the compression ratio, you have to shave material off the head gasket surfaces, or use pistons that project farther into the combustion chamber, or some other physical hardware difference that makes the combustion chamber smaller.

 

so do you think the TSX uses differant pistons?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shawnd &raquo;</TD></TR><TR><TD CLASS="quote">so do you think the TSX uses differant pistons?</TD></TR></TABLE>Beats me! They could also use a different head with smaller chambers. If I really needed to know I guess I'd look up part #s.

I guess I was answering your question on a little more theoretical basis.

 

it most definitely uses higher compression pistons

 

is that something you can replace?
I probably would never do this, just curious.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shawnd &raquo;</TD></TR><TR><TD CLASS="quote">is that something you can replace?</TD></TR></TABLE>Yes, you simply(!) have to dismantle the engine & put them in.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shawnd &raquo;</TD></TR><TR><TD CLASS="quote">I probably would never do this, just curious.</TD></TR></TABLE>Good, because you shouldn't just do that until you understand ALL the other things that are different, too. Unless you do the whole package, you really have to worry about what's compatible with the hardware & software from your Accord.