This reflash is for the Civic Si with K20A3 engine.

Applications

• US Civic Si with K20A3 engine (ECU part number PNF A01 through PNF A12)

We do not recommend the use of nitrous or forced induction for this reflash. For these applications use the K-Pro.

Pricing

This reflash is specifically tuned for the USDM Civic Si K20A3.

• K20A3-Si ECU flash program 7700 rpm REV limit - $295

Hondata does not sell direct - all sales and payment must be conducted through Hondata dealers. The upgrade information form must be sent with your ECU.

Details

The K20A3-Si program advances the ignition, alters the cam timing and optimizes the fuel for a cold air intake, adding 4-9 ft lb across the rev range.

2002 Civic Si, stock and with K20A3-Si Flash program.

• 10-12 Peak HP gain depending on the dyno and modifications
• 4-9 ft lb torque across the rev range
• Power peak raised 400 rpm from 6300 rpm to 6700 rpm (higher with headers)
• Rev limiter raised to 7700 rpm.
• Fully dealer compatible - works with all Honda scan tools and equipment.
• 0-60 mph times improved by 1 second.

What if you have modifications?

This program was tuned specifically for a CAI (cold air intake) as they give the best power gains. All future tuning will be done with either the stock or CAI intake.

Headers have been tested with this program. Dyno charts can be found in the tech section (soon).

Test pipe. This will eventually give you an engine check light telling you have a faulty catalytic converter. We have not seen this error cause any power loss.

If you have nitrous this program will probably not be suitable due to the aggressive ignition advance used.

For consistency in dyno testing we suggest you follow the dyno procedure outlined here.

Tuning notes

This tune for 91 octane pump gas. We have not tested it on 87. In the graph above, the change in octane was worth about 2hp and the tuning 8-10.

Two cars were used for testing. A totally stock Civic Si, shown in the graph above, and another with CAI and headers. Surprisingly the response to the flash program on the dyno were very different. The second vehicle showed marginal change on the dyno, yet the owner reported stronger part throttle response and much improved top end. The dyno chart for the second vehicle is below. This is the vehicle in which we measured a 1 second improvement in the 0-60 times.

Any increase in RPM limit is at your own risk. If you suffer engine damage that is related to excessive revs Honda / Acura will not cover your warranty.

With regard to aftermarket parts, the law is that warranty coverage cannot be denied simply because such parts are present on the vehicle, or have been used. For more details read the K series FAQ.

Smog testing shows no measurable difference from stock.

What do others think?

The user forums in http://ephatch.com/forum/ have a lot of user feedback:

"Az02Si
Hondata powered sucka.

Registered: Jul 2002
Location: Mesa,Az
Posts: 280
My Hondata impressions....

Um....BUY IT NOW!!!!!! I just threw my ecu back in my car,and went for a drive....WOW!!!!! The extra revs were REALLY needed with thius motor.3-4 upshift occurs at about 87-89 mph,and the car REALLY feels alive up top now too.It feels like a stretched,smooth powerband with a few extra ponies thrown in the mix....Im VERY happy,and will provide dynocharts ASAP.IMHO,ANYONE who can afford it should just get it..It WILL be a must have for these cars.It reminds me of my old b16 now,watching the tach go to 7800ish Ill post more impressions shortly,i gotta DRIVE!!!!! Thanks to the crew at Hondata for a GREAT product that everyone will love! "

Thanks

Shawn Church Automotive for the Dyno facilities, testing and useful feedback. Shawn has hundreds of Honda/Acura dyno plots on his Dynapack dyno if you would like to compare your Acura/Honda performance.

Rick and An for the use of their Civics.