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300hp Accord Concept

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Old Feb 4, 2004 | 03:09 PM
  #1  
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tcd
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From: central
Default 300hp Accord Concept

Does anybody remember Honda making a concept of the Accord coupe with 300hp? This was about 2 years ago. Do they plan on putting it into production?
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Old Feb 4, 2004 | 10:13 PM
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From: Rowland Heights
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I remember I saw something like that in super street. It was a ACR accord I guess. It had the Acura TL auto tranny and a bunch of other stuff. It was suppose to do low 14's.
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Old Feb 4, 2004 | 11:34 PM
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Yea, it was a 6th gen ('98-'02) Accord with lots of goodies.

Here's some info I pulled from one of the threads on my forum. The info was all pulled from some article on the ACR.

Honda Accord AC-R

Revealed

The following is a list of parts that is in the 300 hp Accord AC-R.

Much of the parts for the Honda Accord AC-R are Honda OEM parts...just from different vehicles. I recommend you go here and print out the grade data for the 2.5 liter V6 Inspire...this is where most of the AC-R stuff comes from. The Inspire 2.5 uses the J25A engine (2.5 liter SOHC V6 with VTEC).

Transmission
First lets start with the transmissions. Many of us think the automatic is not that great and stick would be better...but in this car for the quarter mile there really is no gain in time. Remember with the automatic you only go through three gears where as with a manual you will go through 4 and the 3 to 4 shift time cancels out any gains with a manual. Oh and there is a manual transmission for our car...the NSX transmission will bolt directly to the block...how do I know this...because there is an engine dyno at Honda factory that requires a manual transmission for testing...and they bolt the J series engine to an NSX tranny for testing. But before you go doing the swap you do need stuff like a custom linkage among others.

The AC-R uses the stock transmission modified (or basically a stock 2.5 Inspire transmission), the computer has been adjusted for quicker shifts though...so you would need an after market chip to increase shift speed. The transmission itself is quite strong but because in stock form the shift time is so slow it wears out the tranny faster. The AC-R also uses a different rear end ratio...it uses the rear from the 2.5 Inspire...I think our rear in the Accord is a 4.2, but the rear from the Inspire is a 4.53...which gives you a better overall torque multiplier. I also think the third gear from the Odyssey mini-van is used in place of our stock third gear. By the way they reccommend using a better torque converter to get the revs up from the launch...I would reccommend using Level Ten for this.

Exhaust and Intake
The AC-R uses a custom 2.5 exhaust with no cat...when they race they just unbolt the exhaust from the headers. And about the headers...the header lenghts are not as short as the comptech ones...and by the way the headers were made by DC Sports for Honda as a custom job...I don't think DC Sports will make them.
Now the intake...honda said they experimented with various cold air and short ram intakes...but theres works the best. What they did was take out the resonator...use the stock air box with out a filter and they used like a big piece of plastic tubing from the box into the throttle body (it looked like a modified Iced Tea pitcher).

Top of the Engine
The throttle body is from a CL Type-S as is the Intake Manifold. The Intake Manifold needs a chip to activate the butterfly valve at a certain RPM...I think you can use like a VTEC controller or something to do this. The heads are right from a CL Type-S...that's how they get the revs up so high. I know that they just had the heads extrude honed and I think they are having new cams made too. This is good for us because now Extrude Hone has the molds to do our heads.

The Bottom End
I'm not sure about the connecting rods (I think they are stock) but the Accord AC-R uses the pistons from the Inspire which are the same 86mm bore but are domed which bumps the compression to 11.5 to 1.

Parts List
Here's a quick run down:
Inpire 4.533 rear
Odyssey 3rd gear
Tranny Chip
Upgraded Torque Converter (reccommended)
2.5" Exhaust
DC Sports headers (all though you can only by CompTech's)
Custom Intake
CL Type-S Throttle Body
CL Type-S Intake Manifold with butterfly controller
CL Type-S Heads
Inspire Pistons
Custom hood to fit it all in
Drag slicks
Custom leather and Suede seats by Recaro. And yes that is a plexie glass roof.

Specs-

Engine:

Displacement 2,997cc

Bore x Stroke 86mmx86mm

Horsepower 300 @ 7,200rpm

Torque 231.5lb-ft @ 5,500rpm

Performance:

0-60 mph 5.7 seconds

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Old Feb 5, 2004 | 12:05 AM
  #4  
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Is that in the current body-style accord
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Old Feb 5, 2004 | 12:11 AM
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From: Berkeley
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why bother. that thing will just torque steer and understeer like crazy. either that or the traction control will have to work overtime to keep the front tire in check and in the process "numb down" the performance. instead, honda should focus on making a 300hp s2000.
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