<SFR> ::FAQ:: SFR 3.8 V6 ECU Reflash - Genesis Forum: GenCoupe Hyundai Genesis Forums
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#1 Old 09-26-2011, 08:22 PM
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<SFR> ::FAQ:: SFR 3.8 V6 ECU Reflash

Since search function on this forum isnt' the best outthere and a lot of people don't tend to do some search , we've decided to make a thread of FAQ on our 3.8 Genesis Coupe ECU reflash.

If you've been directed to this link means we are helping your lazy a$$ j/k

This is what I can think of right now but as we get more questions, I shall update on this.


3.8 V6 SFR ECU Reflash F.A.Q




- What does it exactly do?

1. Throttle response

Since Genesis Coupe has E-throttle body that is controlled by sending signals

with ECU, there are some delay/hesitations with throttle body. It also has to

do with notorious rev hang issues we've seen and experienced especially with

automatic tranny. With SFR reflash, we can control the timing and

responsiveness of throttle body remapping the logic of the throttle body.

Reaction time will be a lot quicker and all the lag that used to be with stock

tune will be gone. We don't want it to be too touchy especially for the

customers located in East coast where they get snow in winter, so we've put

it in the safe range. Going into full throttle (80% opening) is going to be

much faster resulting to reach desired RPM faster than stock tune. It also

saves gas mileage since car will be more responsive with throttle (with less

amount of gas on the foot moves the car... Injection = amount of foot to the

gas)

2. Unleashing torque management system

There is a torque management system built into Delphi 3.8 V6 ECU that is

limiting the power to the ground (Even with traction control off). It also has

to do with traction control/tire pressure sensor that ECU will automatically

limit off the power if it detects any loose tractions. We program the torque

management system to turn off the traction controll fuly when it's OFF.

Traction control will work just like stock when it's ON.


3. Advanced timing

We give out timings depends on what octane rate you are running the car.

The higher octane you are running with the car, the more aggressive timing

we will be given to each flash.

MAF based 3.8 sensors/o2 sensors/ECU are very sensitive that slight change

in Octane/MAF flow rate will affect very easily. We recommend to stay with

flashed octane as always (You can go up but you can't go down on the

octane rate) in order to avoid on the misfiring issues.

Also note to use legit brand named Gas stations to get octane rate as

advertised.

Giving more timing will make more power throught the RPM, and the customer

definately feel the aggressiveness of power and torque.

We recommend one step colder spark plugs for 93+ (octane) tunes (especially the custom tunes)


4. Trimming A/F ratio

3.8 ECU is targetted A/F ratio map that ECU try to adjust to the A/F ratio we

set at. It's little harder to adjust with some aftermarket intakes that

bypasses MAF sesnor some air (ex. INJEN) since ECU is not monitoring the

right amount of air coming in. However, after all these years of experience

we know exact what to give for such modifications/combinations with

exhausts and other aftermarket bolt-ons.

Giving out more aggressive A/F ratio will generate more power in desired RPM

range (or all range) but there is a risk of misfiring or shorten the life of motor.

Our canned tune is set at more than safe range.


5. Rev limiter/Top Speed governor

We can only change the rev limiter on Manual tranny cars though auto

tranny can go up to desired rpm in 5th and 6th gear.

The usual and proven RPM bump is @ 7200rpm. Neutral RPM rev limiter is still

@5000rpm like stock. We can always change this but in case of dealers

checking things out with possible alternations, we didn't want to put

anything too obvious. Top speed governor will be taken out and there will be

no limit to the top speed.


- Dyno vs Performance/Drivability gains?

Dyno gain on canned tune on 3.8 V6 is about 5-20 rhwp (dyno peak powers)

range ONLY.

If you break it down some areas (RPM), it would be around 10-40rhwp gains

and 20-60lbs of torque.

A lot of people are so crazy about making some useless peak powers on the

dyno but as we stated above it's all about the drivability gains for 3.8 V6

ECUs.

Our canned tune for each octane rate is set at more than safe range of A/F

ratio/advanced timing that can be performed right without getting into

problems. Giving more aggressive timing or leaning out A/F ratio might yield

few more hp but it will not make a big difference and have more chance of

getting into problems (ex. Limp mode/misfiring/etc)

This is also one of the reasons why we've been suggesting our canned tunes

that will increase in overall performance and drivability while it's problem-free.

With canned tune, it's already proven by bunch of members to shave at

least .5- a second on the quater mile which is hard to believe while gaining

only such numbers on the dyno. This proves enough evidence that it's not all

about making useless numbers on dyno but tune must be targetted more

towards to drivability on 3.8 V6 ECU.


- Automatic vs Manual?

Performance gains on both tranny would be about the same. Due to increase

in response of throttle, people with manual tranny will have to relearn where

to engauge the clutch( it should not take long). Once you get the feel of it,

throttle is right there. Especially people doing some high skilled

drifiting/Touge/time attack should have advantages doing heel n toe/power

shifting/etc. Automatics have less chance to mess up on the shifting so

advantages on the flash is more towards to the transition on the shifting.

Due to throttle response changing gear would be faster/smoother. Going

on/off on the throttle will be much faster and responsive. (ex. You had to

downshift in order to pass somebody on the highway,

now it's just instant foot the pedal and power is right there)

We've seen avg of .7 seconds with manual tranny and .5 seconds with auto

tranny on quater mile times.


- What parts to buy/what mods to do?

We have brands and parts to recommend in order to maximize the outcome of

the reflash. We've done quite many custom tunes for certain brands and

combination. Some wrong modifications such as taking out all catalytic

converters will loose power (Your car isn't 80's Honda civic). o2 sensors not

only monitors the amount of o2 but the temperature of the cat and etc that

if it is not reading right bascially A/F ratio map on ECU that is connected to o2
sensor would also get messed up resulting high risk of running extremely lean

or rich. If it runs lean, ECU will pull timings resulting loss of power as well as

running rich. So please contact us for any modifications prior or after the ECU

flash. We'd be more than welcome to help out selecting parts as well as

locating and giving the best pricings as possible. We'd refuse to tune certain

cars that have the parts already on the car we aren't really sure about. I



- Retune?

If you are only putting in some bolt on parts such as intake/exhaust/etc, you

don't need the retune. Flahsed ECU will act just like stock ECU that will

relearn itself overtime. It only takes few seconds to reset the ECU by pulling

the ECU fuse in the fuse box located near the battery. No you will not loose

the flash by disconnecting the battery or pulling the fuse out. ECU flash is

permanenant. ECU will go back to when we first flashed the ECU after the

reset.

If you are coming with other tuner's tune, we will have to charge extra to

returning ECU back to stock first to get the basedata made. So far we are

the only vendor that reuses the ORIGINAL stock data converted to tuned

data.


- Warranty

We don't guarantee anything about Hyundai's warranty with ECU flash. Get

this at your own risk just like any other aftermarket parts you put on.

However, it's not obivously seen or detected compared to any visible mods

such as intake/exhaust/etc.

We always use original stock data pulled then modified to tuned data, so all

the calibration data and other ECU functions remains exactly the same as

stock.

We also have just started offering the ECU core for those of people who are

really worried about their warranty, and you can keep you stock ECU and

tuned ECU.

Then, basically switch them out when you go to the dealer for any services.


- Feedbacks

As of today 09/26/2011, we've done little over 350 Genesis coupes ECU flash

(both 2.0T and 3.8 combined) since July 2010.

We've been getting bunch of positive and "WOW" responses, but feedbacks

are all over the places that can't get all of them at one place.

We've been collecting some of feedbacks that we can find and it's here:

(Please read through the initial thoughts and impression that fellow Genesis

owners have experienced)

<SFR> SFR 3.8 V6 Reflash Review & Feedback Thread

Thank you

15YEARS IN KDM BUSINESS

TEL: 610.619.3527
www.seoulfulracing.com
OEM/KDM/AFTERMARKET
INSTALL/DYNO/ECU TUNE

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#2 Old 09-26-2011, 08:30 PM
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Thank you. Very nice and comprehensive info.
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#3 Old 09-26-2011, 08:31 PM
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Woot woot! Love my tune!

Senior Member of the Genesis Coupe High Mileage Club

2010 Hyundai Genesis Coupe 3.8L V6 Track M/T in Mirabeau Blue (Eva)
Started at 25 miles, retired at 145,000 miles, met new owner and still kicking, in total driven 145,000 miles

2012 Hyundai Genesis Coupe 3.8L V6 Track M/T in Interlagos Yellow (Fei)
Started at 22,000 miles, currently at 37,000 miles and active, in total driven 15,000 miles

Total Miles in a Gen Coupe - 160,000 miles

*Over 137,000 miles tuned by Jay @ SFR*

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#4 Old 09-26-2011, 08:39 PM
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Wow great write up thanks im pumped for the atl tune day
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#5 Old 09-26-2011, 08:39 PM
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Garage

Great idea posting this, it sums it up perfectly.

2010 KW 3.8 Track


Ark - Agency Power - GTspec - Megan Racing
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#6 Old 09-26-2011, 08:51 PM
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Great post.

Hyundai Genesis 380GT
Grand Touring Edition W/Navigation
Auto Trans
Karussall White
Exterior: CF Sarona Grill, Sequence Spec-1 Rear Deck Lip, VIS CF Foglight Bezels, CF Rear Diffuser, 380GT Badge, Genesis Wing Badge, 25% Tint
Suspension: Eibach Sportsline Springs
Engine: Stillen Dual Exhaust, Injen Cold Air Intake
Wheels: Stance SC-5ive 20x9 In Front, Stance SC-5ive 20x10.5 In Rear
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#7 Old 09-26-2011, 08:54 PM
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Can't wait to be tuned again

2011 Tsukuba 3.8 R-Spec
*ARK Grip Exhaust *Injen CAI *SFR Reflash *Eibach Sportlines *Grimmspeed Phenolic Spacer
*System Upgrade Short Shifter *Diode Dynamics 6k HiDs *M&S Fog Surrounds and Type-D Grill
*Varrstoen ES 3.3.2 19x9.5 19x10.5 +22 Gloss Anthracite Sparkle
*Hankook Ventus V12 Evo 245/35/19 275/35/19
...Other Gay Stuff
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#8 Old 09-27-2011, 04:04 AM
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beautiful write up....as soon as the wife let me, I'll be getting it real soon. Good info Jay...

Current vehicle:
3.8 Track/ZF Auto, Front Clear Bra, Stillen Front Lip,
Custom Borla Exhaust, x-pipe, 2 resonators
R1 Concepts slotted/drilled rotors
Stoptech HP brake pads
Injen Cold Air Intake
M&S Type-D Grill, wing badge rear
35% window tint,2013 tails
**SFR Reflash**
1/8th mile: 8.96
Previous cars:
1996 Ford Taurus GL 1st car...slow
2005 scion tc supercharged 225whp
2008 Pontiac G8 full exhaust/rotofab/tune/1.5in drop
Cardomain.com/meltc
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#9 Old 09-27-2011, 09:54 AM
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.5 sec ....that Awesome...Cant wait Jay...
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#10 Old 09-27-2011, 10:34 AM
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Jay,

For all those that don't know how to use search, this is bad-A.

Hopefully we wont see anymore useless threads asking for info!

Excellent write-up and I cant wait to experience the tune.

[SIZE="1"]'10 Acqua Minerale Blue 3.8 Track Clutched (is there any other way?)

SFR 1.5 | AEM | Ark | Axis | Stance | SU STS | Abrams | R1 | Stoptech | EBC | Luxon | M&S | '13 Tails
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#11 Old 09-27-2011, 03:29 PM
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Much needed info as most people do not like to search

I love my SFR tune

135i N55 DCT
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#12 Old 09-27-2011, 03:42 PM
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I didn't know us east coast guys get 80% opening on the throttle. Well in the near future when I go back to Cali for good, can I have it switched to 100%? :P

"My coupe is my sanity"
2011 Nord Gray 3.8 Track
Megan Racing Transmission Mount-LED Angel Eye-Modified 2nd Cats-SFR Rigid Collar-System Upgrade Headers-Vega Type 1-TSW-BC Racing-Grimmspeed Phenolic Spacer-NST Pulleys-Ralco STS-SFR 1.5 Refrash-7ism Race CBE-"Coupe GT" Rear Badge-Blox Racing 490 Knob-GC Tuner Carbon Rear Diffuser-Injen CAI
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#13 Old 09-27-2011, 05:13 PM
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80% throttle is the most opening in these cars either flashed or stock... You probably misunderstood that part.

15YEARS IN KDM BUSINESS

TEL: 610.619.3527
www.seoulfulracing.com
OEM/KDM/AFTERMARKET
INSTALL/DYNO/ECU TUNE

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#14 Old 09-27-2011, 06:17 PM
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good info!
I can't wait till Oct, the power cut between 2-3 shift is one of the most annoying thing that makes me dislike the car

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#15 Old 09-27-2011, 06:27 PM
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Thank you sooo much for this! Really appreciated! So the ECU does intervene even when the Traction Control is turned OFF and your re-flash does disable it 100% if you push the button! Brilliant!!
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#16 Old 09-28-2011, 10:04 AM
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Thank you for a great writeup!

Couple more questions:
1) What's the best way to collect engine parameters to send you for a custom tune? I have a Bluetooth OBD2 reader, which can be connected to an Android phone/tablet running Torque, or to a PC.

2) Do you guys offer an ZF automatic transmission flash? I heard somewhere that it can be tuned for faster (if rougher) shifts, which actually REDUCES wear, since the transmission spends less times with two gears engaged simultaneously.
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#17 Old 10-09-2011, 06:53 AM
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Great write up
Answer most of my questions
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#18 Old 10-10-2011, 08:11 AM
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Hey Jay, or any other member that has the link to the YouTube video of the demo car on the dyno showing the before and after results of the tune. Can someone place it in this thread. I have seen the video three tines, but I am unable to locate it now. Go Figure. The video is showing the car with no rev limited and no speed governor.


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2012 3.8 Track A/T Becketts Black

SFR ~ Injen ~ M&S ~ Escort ~ Sterlin ~ Stance ~ Incurve ~ Vredestein ~ Alpine~Grimmspeed~P2R
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#19 Old 10-10-2011, 08:20 AM
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SFR ECU Reflash for Genesis Coupe 3.8 V6 - YouTube

can't... figure out... embedding... >.<

2011 Tsukuba 3.8 R-Spec
*ARK Grip Exhaust *Injen CAI *SFR Reflash *Eibach Sportlines *Grimmspeed Phenolic Spacer
*System Upgrade Short Shifter *Diode Dynamics 6k HiDs *M&S Fog Surrounds and Type-D Grill
*Varrstoen ES 3.3.2 19x9.5 19x10.5 +22 Gloss Anthracite Sparkle
*Hankook Ventus V12 Evo 245/35/19 275/35/19
...Other Gay Stuff
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#20 Old 10-10-2011, 08:25 AM
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Thanks, been trying to find it, but now I know why. This video has not been made available on mobile devices. I was searching for it with my iPad. Thanks again.


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2012 3.8 Track A/T Becketts Black

SFR ~ Injen ~ M&S ~ Escort ~ Sterlin ~ Stance ~ Incurve ~ Vredestein ~ Alpine~Grimmspeed~P2R
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