Originally Posted by mrheeltoe

The engine in your TSX is controlled by a computer, which should come as no surprise. The computer, like all computers, are dumb. They just do what some programmer somewhere told it to do. Meaning, your car is running on a program made by some nameless, faceless engineering group at Honda to be the best Honda it can be.

Unfortunately for you, that does not mean it is the best PERFORMING Honda it can be. Engineers have to report to the company which needs to report to its customers. Not all customers are power-hungry pedal stoppers like you and I are. Therefore, there is almost always some power left on the table somewhere.

The Hondata Reflash for the 04-06 TSX is a revamped set of parameters that is downloaded onto your stock computer to de-geek it. Ironically, the program of the reflash was developed by the biggest Honda-geek of them all, Doug who is the head honcho at Hondata. That anyone, for a mere few hundred bucks, can get a fully optimized ECU tune by one of the modern-day masters is nothing short of a no-brainer.

During a recent dyno testing stint at Church Auto Testing in Wilmington, CA, I had the opportunity to do a little before-and-after test of the reflash on my personal HTSpec TSX. This 2004 model has about 120,000 miles on it and minimal mods (just an CT-Engineering Carbon Icebox, UR Underdrive Pulleys, and a Fujitsubo exhaust). Check out the before and after dyno graph:



READ MORE ABOUT HOW IT WORKS HERE:
The Hondata Reflash THE best bang for the buck on your 04-06 TSX - HeelToe Automotive

Originally Posted by personinma

wish this would happen for the 08.. i don't have the necessary need for flashpro, but would like to reap the benefits of the hondata reflash

Originally Posted by delslo9

After getting my 04 6speed reflashed It feels like a TOTALLY different car. AMAZING. I highly recommend it




07-08 can be reflashed at certain Hondata dealers. See if one is close to you http://www.hondata.com/hondata_dealer_reflash.html

Originally Posted by tsx-ness11

Not that this would be a reason to do this mod, but has anyone seen better mpg?

I'm in real estate, so i do a bit of driving. Lots of interstate too, already i am getting 30~mpg

Originally Posted by J_Phil

Hey Marcus, its me again lol. Question, I don't think I'll be adding on any more bolt ons that will affect a/f ratio other than the ones i have now. Would things like the hondata gasket, UR pulleys, or tb bypass warrant a tune to draw as much power out of it as possible or can i put on things like those after the reflash and still reap the full benefits of said mods?

Originally Posted by tsx-ness11

Not that this would be a reason to do this mod, but has anyone seen better mpg?

I'm in real estate, so i do a bit of driving. Lots of interstate too, already i am getting 30~mpg

Originally Posted by StealthTSX

There will be no mpg gains from the Hondata Reflash.
In theory, you may be able to gain MPG by building a mild & leaner tune with FlashPro but no way would that ever pay for itself.

If you are looking for MPG gains, leave your car stock & save the money you spend on mods for purchasing gas.

Originally Posted by dmurrain1stgen

have a ? on this i have an 05 tsx automatic i really want to do these reflash but was told couldnt do it. have to have an 08 ecu and use flashpro. need advice asap

Originally Posted by StealthTSX

I could type a novel but all the answers you need are on the Hondata website. http://www.hondata.com/wizard/wiz_tsx.html

I recommend that everyone read the Hondata website top to bottom. It has a ton of information, for Hondata products, plus technical information,
plus a technical forum.

Originally Posted by green_henry

+1

You would have to be a very disciplined soul to milk any mpg out of this upgrade. I'm confident that everybody who has done this upgrade has seen their mpg decrease due to the "fun factor". The TSX is a driver's car, and the reflash upgrade makes it a lot more fun to push it to its limits.