[home][rumors and news][model release matrix][dealer network][desktop calendar][exhaust notes][tov forums][links][search][sponsors][garage][login]

Tire Rack Upgrade Garage
 Search for a Dealer:
 Canadian Flag US Flag
 Honda Acura
 ZIP  
NSX GT3 Evo To Compete Globally in 2019
More.......................
2019 Acura ILX Arrives with Dynamic New Styling, Major Technology Upgrades and New A-Spec Treatment
More.......................
Honda Joins with Cruise and General Motors to Build New Autonomous Vehicle
More.......................
Honda reports September 2018 sales numbers
More.......................
Honda recalling 232,000 2018 Accords and 2019 Insights for rear camera software update
More.......................
2019 Accord arriving in showrooms by November
More.......................
Is a base trim of the Civic Type R finally arriving for MY 2019? (More MY2019 info inside)
More.......................
Team Honda Research wins ST2 at NASA Nationals with their NC1 NSX
More.......................
TLX --> Re: My TLX so far
Join Discussion......
Amateur Racing & Driving --> Re: TSX @ NCCAR Apexfest
Join Discussion......
Today's Reading Links --> Re: European CO2 madness and why electromobility is pointless
Join Discussion......
Today's Reading Links --> Re: "2019 Toyota Supra Is a BMW Parts Bin Car"
Join Discussion......
Fuel Cell Technology --> DMV Stickers, we don't need no stinking stickers
Join Discussion......
Type R --> Re: DC-R
Join Discussion......
Clarity --> Re: Clarity PHEV Owner
Join Discussion......
Today's Reading Links --> Re: Tesla’s Model 3 Is Becoming One of America’s Best-Selling Sedans
Join Discussion......
General Talk --> Model Release Matrix?
Join Discussion......
General Talk --> Re: Fixing SH-AWD
Join Discussion......
General Talk --> Re: CR-V Hybrid 4wd iMMD
Join Discussion......
General Talk --> Re: BMW Drops 3-Series Manual Globally... Audi A4 too...
Join Discussion......
Professional Motorsports --> Re: IMSA finale
Join Discussion......
Civic --> Re: 2019 Civic Accessories
Join Discussion......
General Talk --> Re: Goodbye TL-S 6MT
Join Discussion......
First Drive: 2019 Honda Insight
Read Article....................
2019 Honda Insight PR Photo Gallery
Read Article....................
First Drive: 2019 Acura RDX
Read Article....................
2019 Acura RDX Features & Specifications
Read Article....................
PR Photo Gallery - 2019 Acura RDX Advance
Read Article....................
PR Photo Gallery - 2019 Acura RDX A-Spec
Read Article....................

[fancy] [flat] [simple]
  TOV Articles > TOV Dyno Test: 2013 Accord EX 6MT > > Re: Good comparison...

Viewing Threshold (What is this?)

Thread Page - [1]
Author
    
notyper
Profile for notyper
Good comparison... [View Article]    (Score: 1, Normal) 03-07-2013 19:48
Reply to This Message Attach Quote to Reply
The TSX is running the same size wheels and while it has 10mm wider tires (Pilot HX MXM4), they are listed as the same weight as the Accords Primacy MXV4. So this is about the best head to head you're going to get.

First thing to notice is the flat spot in the TSX curve from 5500-6000 rpm. This is due to Honda putting the VTEC point too high. Imagine a straight line from 5500 to 6000 and you'll get what an optimal curve is for the K24Z7 (without any fuel or ignition tuning, that wouldn't be fair).

So what we're left with then is the K24W producing about 6-8% more output across the board up to 6000 rpm. Why is this? Well first of all, you'll note that the VTEC point on the K24W is at 4800 rpm - much lower than even an optimized Z7. You'll also note how the torque curve of the Z7 falls off sooner.

All this is entirely in keeping with the premise of the K24W which is to optimize the engine for direct injection and bottom end operation. DI requires a high tumble intake port design. This is good for low end torque, bad for high rpm power. DI allows higher compression for a given octane as well (so, 87 octane instead of 91 as required for the Z7). The VTEC point indicates that the cams are smaller, or, at least more biased for low rpm torque. This is all a better fit for the integrated exhaust manifold and close coupled catalyst as well. At lower rpms the exhaust restriction posed by this setup is not nearly as big a problem as it is at high rpm.

So, all in all, where the Z7 is a horribly hamstrung engine trying to combine previous K-series tech with the integrated exhaust manifold, the W is far more suited to this setup with its ports and cams designed for lower rpm operation. There won't be anything happening above 6500 rpm, but let's be honest, there isn't much happening up top with the Z7 either (even de-catted and tuned, the power is pretty flat from a little over 6200 to 7500 rpm).

SC

40mpg
Profile for 40mpg
Re: Good comparison... [View Article]    (Score: 1, Normal) 03-08-2013 16:44
Reply to This Message Attach Quote to Reply
Jeff,
How about comparing this dyno with the Sport's CVT dyno you had before?

outersquare
Profile for outersquare
Re: Good comparison... [View Article]    (Score: 1, Normal) 03-08-2013 18:41
Reply to This Message Attach Quote to Reply
The 9G accord also uses electric power steering which is probably worth a couple HP at the wheels.
outersquare
Profile for outersquare
Re: Good comparison... [View Article]    (Score: 1, Normal) 03-08-2013 18:50
Reply to This Message Attach Quote to Reply
excuse me, the tsx also apparently uses EPS, only the 8G accord still uses hydraulic.
mp4/5
Profile for mp4/5
Re: Good comparison... [View Article]    (Score: 1, Normal) 05-07-2013 19:41
Reply to This Message Attach Quote to Reply
I recently purchased a 2013 Accord lx-s 6mt and after looking at the dyno I wonder what difference it would make running the k24w with premium gas, I did switch from regular 87 to 93 octane and the car feels much more alive, even the engine sounds is more aggressive.

 
Thread Page - [1]
Contact TOV | Submit Your Article | Submit Your Link | Advertise | TOV Shop | Events | Our Sponsors | TOV Archives
Copyright © 2018 Velocitech Inc. All information contained herein remains the property of Velocitech Inc.
The Temple of VTEC is not affiliated with American Honda Motor Co., Inc. TOV Policies and Guidelines - Credits - Privacy Policy
29 mobile: 0