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I am new to turbos and after reading quite a bit about my new EX-T, I thought I'd add at least a less restrictive air intake. My question is does the ECU have to be reprogrammed? Also, if I added a CAT Back exhaust, would it need it? Or, if I did both. I quess my concern is the factory warranty if the ECU is flashed or modified. Thank you for any input.
 

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I am new to turbos and after reading quite a bit about my new EX-T, I thought I'd add at least a less restrictive air intake. My question is does the ECU have to be reprogrammed? Also, if I added a CAT Back exhaust, would it need it? Or, if I did both. I quess my concern is the factory warranty if the ECU is flashed or modified. Thank you for any input.
Bolt on parts should work just fine with this car. So far the bolt on parts have made power, and they have great dyno results.

It will make more power with a reflash.


Here is the Injen intake Dyno
 

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Not bad at all, although whoever is getting these shouldn't just get it alone but use this intake or another one as complementary to another engine air/fuel mod.
 

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Modifying anything technically voids factory warranty but there's a lot of things they'll overlook. ECU modification is definitely not one of them though.

Turbo or non-turbo, in order to maximize and yield the most out of these modifications (intake, exhaust, etc.) the car needs to be tuned. A lot of manufacturers have dyno charts posted but you'll find a lot of times people cannot replicate or get the same amount of power out of the products until a tune is done.
 

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as long as you can easily undo it to a point they can't tell anything was done then your in the clear.
only thing is, at times you have no choice but to take it to the dealer, whatever mods you have done need to be undone.
fortunately regular maintenance can be done on your own or at some shop other than Honda as long as you have paperwork proving the work was done.
 

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So how about Hondata Flash Pro to bring the AFR into line with the bolt ons.I also own a 12 SI BTW.
 

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The FP will allow you to get more out of the mods, but will alter the ECU calibration. If you take the SI in for service be sure to return at least the ECU to stock before the service is requested. It is highly likely they will deny coverage (If still under warranty) if the aftermarket cal is loaded in the ECU. I also know a great E-Tuner if you are interested which I've used for years for my 2013 SI I owned.

Truckin
 

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So how about Hondata Flash Pro to bring the AFR into line with the bolt ons.I also own a 12 SI BTW.
That works if one does it correctly.

To get correct air fuel ratio readings you need a wideband gauge installed before the oem catalytic converter. Many tuning shops just use a sniffer on a tailpipe which is a good distance from the engine, and it is measuring airflow after the cat. converter. I've had that type of reading done on my S2000 initially, and then I had a wideband sensor installed ahead of the cat. I can tell you that the readings are different by almost a full point across the board. So if you want a Flashpro to tune accurate air fuel ratios you really need to go much further with the setup. The OEM cat is so close to the engine on our cars it would be a bit of work to do it right unless one eliminates the cat and downpipe for an aftermarket setup.
 

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I'm pretty sure the flash Pro will use a MAP method for the AFR.I also have a scan gauge thats a wifi transmitter to my iPhone.This will provide some information now before I tune my car.This is 1of 4 dashboards each with 6 gauges.It data logs also so am going to do a datalog now than another in a week to see if any fueling changes are made by the ECU.Ill datalog also a regular drive on the same route driving the same each time to simulate identical conditions.Most of you know I have The Mishimoto intake installed on my EX-T.
 

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The FP will allow you to get more out of the mods, but will alter the ECU calibration. If you take the SI in for service be sure to return at least the ECU to stock before the service is requested. It is highly likely they will deny coverage (If still under warranty) if the aftermarket cal is loaded in the ECU. I also know a great E-Tuner if you are interested which I've used for years for my 2013 SI I owned.

Truckin
I'm sure you've seen my 12 SI on the 9th as I'm GHOSTMONKY.
 

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On this car mods like intakes and exhaust make power by leaning out the air-fuel mixture, since the car runs pretty rich in oem form. You won't need a tune for either of those simple mods as they are working as intended.


If you want to alter the boost and ignition timing then a tune will open up more power potential for you.
 

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I'm sure you've seen my 12 SI on the 9th as I'm GHOSTMONKY.
Didn't know that until I read your other post LOL! Well then I know you know of whom I am referring to (**Coughs** VIT) LOL. He does serve us well. Anyway, no further instruction here hehe

Truckin
 

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I'm pretty sure the flash Pro will use a MAP method for the AFR.I also have a scan gauge thats a wifi transmitter to my iPhone.This will provide some information now before I tune my car.This is 1of 4 dashboards each with 6 gauges.It data logs also so am going to do a datalog now than another in a week to see if any fueling changes are made by the ECU.Ill datalog also a regular drive on the same route driving the same each time to simulate identical conditions.Most of you know I have The Mishimoto intake installed on my EX-T.
i'd say send that scan gauge back...it's not transmitting any useful data! :D
 

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Yea I feel like Silver2Coupe not that there's anything wrong with that.
 

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But yea soon
 

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On this car mods like intakes and exhaust make power by leaning out the air-fuel mixture, since the car runs pretty rich in oem form. You won't need a tune for either of those simple mods as they are working as intended.


If you want to alter the boost and ignition timing then a tune will open up more power potential for you.
For the people looking for power going up to 50hp+ I think a tune will be necessary since that is the sort of power increase you can actually feel throughout the power band, at that point it starts to get rewarding.
 
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