[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  
Acura
There are currently no active Acura promotions
Honda
There are currently no active Honda promotions
Japanese Vezel MMC hints at styling updates for coming 2019 HR-V refresh
More.......................
American Honda Reports January Sales Results
More.......................
2018 MDX gets the updated ODMD 2.0 user interface from the 2018 TLX
More.......................
Hondata releasing FlashPro for Civic Type R on March 30th!
More.......................
First impressions and some background info on the 2019 Acura RDX Prototype
More.......................
2019 Acura RDX Prototype Debuts with Evocative Styling, Higher Performance, New Tech and Luxury Appo
More.......................
Live from Detroit! 2019 Acura RDX Reveal
More.......................
Honda releases more information on the 2019 Insight
More.......................
Civic --> Re: Just bought a new 2017 Si Sedan! - already blew a tire
Join Discussion......
Today's Reading Links --> Re: 2018 Jaguar F-Type Coupe 2.0T test
Join Discussion......
General Talk --> Re: Car&Driver 2018 BMW M5 Review
Join Discussion......
General Talk --> Re: From Luxury cars to luxury TRUCKS? What happens to Acura?
Join Discussion......
Fuel Cell Technology --> Shortened range in cold weather.
Join Discussion......
Ridgeline - General Talk --> Re: Ridgeline MMC Desired Changes
Join Discussion......
Photoshops --> Re: Future Honda HR-V Rendering
Join Discussion......
Fuel Cell Technology --> Re: Steering Wheel radio button acting up again
Join Discussion......
Professional Motorsports --> Re: 2018 F1 Car Launches
Join Discussion......
General Talk --> Re: 2019 Supra leaked ahead of Geneva debut!
Join Discussion......
Civic --> Re: Civic Type R video normal everyday driver
Join Discussion......
Accord --> Re: Accord Auto Show Impressions
Join Discussion......
CR-V --> Re: Europe gets CR-V Hybrid
Join Discussion......
TLX --> Re: New 2018 TLX 2.4 Tech
Join Discussion......
Today's Reading Links --> Re: New comprehensive cradle-to-grave LCA study and economic assessment of LDV GHG reductions
Join Discussion......
Jump to:
article details
Author Shawn Church
Categories Dyno Testing, Civic
Create Date August 23, 2011 15:36
Last Update August 23, 2011 16:07
2012 Si - On The Dyno

Today we got a chance to dyno our first 2012 Si. A coupe with Navi, the K24Z equipped Civic performed pretty much as expected. Below, we've posted dyno plots comparing this press fleet car with our original Project Si car as it was delivered back in late 2005.


Click to enlarge

Note that the new Si produces slightly more torque below 3000 rpm. From 3000 to 6000 rpm there is a substantial increase in torque over the old K20, as you would expect with an additional 18% displacement. However, from 6000 rpm onward, where the K20 is in VTEC, the curves are virtually identical with the K20 actually producing slightly more power at peak.

VTEC on the new Si was at approximately 5000-5200 rpm. The new car also ran extremely rich above 6000 rpm. It was probably running in cat protection mode. The old Si's would do this as well, but only after extended running. Every single run from start to finish on the new Si saw it run rich at high rpms, probably a side effect of having to deal with the close coupled catalyst and the higher exhaust gas temps (EGTs)it will see so close to the exhaust ports.

Another interesting note was that the 2012 car showed extreme variability on the dyno. Some runs produced substantially more low end torque (10-12 lbs-ft), but would fall short on the high end. Some would produce less torque below VTEC, but then produce a few more hp on the high end. Datalogging showed the car running very conservative ignition timing (on the order of 12-14 degrees where we would normally run 20-24 deg on a K20). This data indicates, to me, that there is some potential for filling out the torque curve and improving consistency. With no other changes, provided one is willing to risk long term cat problems, tuning should allow this engine to match the K20 from 6000 to 7500 rpm or so, produce a little more torque below 3000 rpm than it already is (and do so more consistently) and improve midrange output a little bit more.

reader's comments
Click Here to Submit Your Comments

Viewing Threshold (What is this?)

[fancy] [flat] [simple]
Subject Thread Originator Replies Last Post
  Dyno it with an ECU reset in between runs
mucter 4
  faster around town?
TonyEX 15
  Top speed
6SPDTL 1
  A question to Notyper.
CR-V9 0
  UNACCEPTABLE.
uhhhh 1
  Shift Points: '06 Si vs. '12 Si
MojaveAccord 5
  As Expected
montechester 8
  TSX comparison
cyisalwayshungry 2
  Shift point? No VTEC love?
TonyEX 8
  RSX-S
NSXman 4
  Good comparison and info
siegen 1
Jump to:
TOV Video: 2019 Acura RDX Walk-around with LPL Steve Hansen
Read Article....................
TOV Photo Gallery: 2018 North American International Auto Show
Read Article....................
2018 Acura RLX PR Photo Gallery
Read Article....................
TOV First Drive: 2018 Honda Accord
Read Article....................
2018 Honda Accord Specifications and Features (FINAL)
Read Article....................
2018 Honda Accord Hybrid PR Photo Gallery
Read Article....................
Contact TOV | Submit Your Article | Submit Your Link | Advertise | TOV Shop | Events | Our Sponsors | TOV Archives
Copyright © 2017 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