HELP....Pls (on Modifying my JDM STI)

Kharusi_86 · 07-21-2008, 12:42 AM

hi all,

I have a 2004 JDM Spec STI with the EJ20...
Some Questions..
1) If i upgrade my turbo or intercooler do i need to re-tune or programe my ECU.
2) Whats Mods can i do B4 i need to touch the ECU.

...i have a 3" Blitz Nur Spec Cat Back, Downpipe, Equal lenght Headers, HKS Cold Air Intake, Blitz Boost Controller, Greddy BOV, Walbro 255 Fuel Pump.

Any Advice will help... Tnx Alot

**FlyingPerformance** · 07-21-2008, 05:24 AM

With the mods you have, I would have already gotten it tuned, a long time ago. I would not personally do any more to the car without getting a tune.

XxSCAxX · 07-21-2008, 09:10 AM

im hoping he is tuned because he said "re-tuned".

upgrading your I/C, no, you dont need a tune. its suggested, but not completely necessary. bigger turbo = YES. you wont be able to go to a bigger turbo setup unless you get bigger injectors anyways, which you would need a tune for.

i havent touched my ECU and many other havent either and im on a 30r kit, a lot of people are on 35rs with not having to deal with the ECU.

psuLemon · 07-21-2008, 09:13 AM

Remove your BOV it is/will make your car run like crap and the boost controller is worthless..

JRsSTi · 07-21-2008, 09:13 AM

On an '04, you're at the most you can do with just getting by without a tune.

***Turbineguy*** · 07-21-2008, 09:21 AM

I think you'll find that there's a descent amount of power to find with what you have now if you get rid of the BOV and the boost controller and get a good tune.

As for going with a bigger turbo and injectors you will need to be tuned. All of you WG duty cycles and fuel curves will be way off and need to be remapped among other things.

**FlyingPerformance** · 07-21-2008, 09:29 AM

Quote:

Originally Posted by JRsSTi

On an '04, you're at the most you can do with just getting by without a tune.

He has a JDM spec car so almost everything you know about USDM cars can get thrown out the window. Its not even the same engine or turbo, let alone ECU.

With that being said, you need to get a tune, it will yield you more HP for the mods you have done.

Where are you located?

**torquemada** · 07-21-2008, 09:30 AM

first, you´re tuned?
1. question
changing TMIC to TMIC...no
changing TMIC to FMIC...yes
changing turbo...yes²

2. question
there aren´t many things left, maybe light flywheel, pully kit, cf drivetrain...without touching the ecu...

oh, and get rid of the bov

Kharusi_86 · 07-21-2008, 02:20 PM

tnx alot guys..

big help, but why get rid of the Blow Of Valve, u mean put the stock one back ??
the thing is i live in dubai, and getting a ECU tuned, there is about 2000$ with 3 dyno runs. and not only that they arnt very familiar with the JDM spec EJ20.

but ill sure do it then, i think since i should have allready done it , ill install the parts i ordered, FMIC, Aps SR56 Turbo, 750 injectors, side fuel lines, Excedy Clutch n flywheel, and tune the ecu after that.

**FlyingPerformance** · 07-21-2008, 02:22 PM

Edited due to the edit of the OP above post

Kharusi_86 · 07-21-2008, 02:27 PM

Quote:

Originally Posted by FlyingPerformance

He has a JDM spec car so almost everything you know about USDM cars can get thrown out the window. Its not even the same engine or turbo, let alone ECU.

With that being said, you need to get a tune, it will yield you more HP for the mods you have done.

Where are you located?

im currently in vancouver canada, but i live in dubai.. check my reply at the bottom.

Kharusi_86 · 07-21-2008, 02:28 PM

Quote:

Originally Posted by FlyingPerformance

Did you get bigger injectors? You will need them with that larger turbo.

yea 750 injectors.. is that good or should i get the 850?

**FlyingPerformance** · 07-21-2008, 02:33 PM

Quote:

Originally Posted by Kharusi_86

yea 750 injectors.. is that good or should i get the 850?

With a 56lb/min turbo, I personally would go with 850cc injectors. Your in between a 30r(52lb/min) and a 35r(60lb/min) and I recommend when going to a 30r that you do 850cc injectors, unless you are going to run Meth injection, then you could get away with a little bit less injector.

Kharusi_86 · 07-21-2008, 02:46 PM

Quote:

Originally Posted by FlyingPerformance

With a 56lb/min turbo, I personally would go with 850cc injectors. Your in between a 30r(52lb/min) and a 35r(60lb/min) and I recommend when going to a 30r that you do 850cc injectors, unless you are going to run Meth injection, then you could get away with a little bit less injector.

k then 850 it is ,tnx u have been a big help, also please check out my videos, in the video section !!

07-21-2008, 12:42 AM	#1
Kharusi_86 Amateur STI Driver Car: Black, 2004, JDM STI Fav Mod: Blitz NuR Spec R Turbo Back Location: Dubai/Oman Posts: 8 Join Date: Jul 2008 Trader Rating: (0)	HELP....Pls (on Modifying my JDM STI) hi all, I have a 2004 JDM Spec STI with the EJ20... Some Questions.. 1) If i upgrade my turbo or intercooler do i need to re-tune or programe my ECU. 2) Whats Mods can i do B4 i need to touch the ECU. ...i have a 3" Blitz Nur Spec Cat Back, Downpipe, Equal lenght Headers, HKS Cold Air Intake, Blitz Boost Controller, Greddy BOV, Walbro 255 Fuel Pump. Any Advice will help... Tnx Alot This ad is not endorsed by this member. Please register or login to hide this ad.

07-21-2008, 05:24 AM	#2
FlyingPerformance Authorized Vendor Car: 2008 STI Fav Mod: Coming Soon Location: Austin, TX Posts: 378 Join Date: May 2008 Trader Rating: (9)	Re: HELP....Pls (on Modifying my JDM STI) With the mods you have, I would have already gotten it tuned, a long time ago. I would not personally do any more to the car without getting a tune.

07-21-2008, 09:10 AM	#3
XxSCAxX Spec C Club Car: 05 AW 30r STi Fav Mod: Perrin 30r Kit Location: Campbell Hall, NY Posts: 1,474 Join Date: Apr 2005 Trader Rating: (5)	Re: HELP....Pls (on Modifying my JDM STI) im hoping he is tuned because he said "re-tuned". upgrading your I/C, no, you dont need a tune. its suggested, but not completely necessary. bigger turbo = YES. you wont be able to go to a bigger turbo setup unless you get bigger injectors anyways, which you would need a tune for. i havent touched my ECU and many other havent either and im on a 30r kit, a lot of people are on 35rs with not having to deal with the ECU.

07-21-2008, 09:13 AM	#4
psuLemon Spec C Club Car: 04 WRB Fav Mod: Greddy TI-C Location: Philly Posts: 1,682 Join Date: Jan 2006 Trader Rating: (4)	Re: HELP....Pls (on Modifying my JDM STI) Remove your BOV it is/will make your car run like crap and the boost controller is worthless..

07-21-2008, 09:13 AM	#5
JRsSTi Lurker Car: Protuned Stg2 STi Fav Mod: Coming Soon Posts: 1 Join Date: Jul 2008 Trader Rating: (0)	Re: HELP....Pls (on Modifying my JDM STI) On an '04, you're at the most you can do with just getting by without a tune.

07-21-2008, 09:21 AM	#6
*Turbineguy* Non-Reformed Meth Addict Car: '06 WRB Fav Mod: 18g on meth. I gotz no lag. Location: Swampbilly Central Posts: 2,287 Join Date: Feb 2006 Trader Rating: (7)	Re: HELP....Pls (on Modifying my JDM STI) I think you'll find that there's a descent amount of power to find with what you have now if you get rid of the BOV and the boost controller and get a good tune. As for going with a bigger turbo and injectors you will need to be tuned. All of you WG duty cycles and fuel curves will be way off and need to be remapped among other things.

07-21-2008, 09:30 AM	#8
torquemada Gold Member Car: WRB EDM 06 WRX STI Fav Mod: Aerys 3" Location: Germany Posts: 983 Join Date: Dec 2006 Trader Rating: (0)	Re: HELP....Pls (on Modifying my JDM STI) first, you´re tuned? 1. question changing TMIC to TMIC...no changing TMIC to FMIC...yes changing turbo...yes² 2. question there aren´t many things left, maybe light flywheel, pully kit, cf drivetrain...without touching the ecu... oh, and get rid of the bov

07-21-2008, 02:20 PM	#9
Kharusi_86 Amateur STI Driver Car: Black, 2004, JDM STI Fav Mod: Blitz NuR Spec R Turbo Back Location: Dubai/Oman Posts: 8 Join Date: Jul 2008 Trader Rating: (0)	Re: HELP....Pls (on Modifying my JDM STI) tnx alot guys.. big help, but why get rid of the Blow Of Valve, u mean put the stock one back ?? the thing is i live in dubai, and getting a ECU tuned, there is about 2000$ with 3 dyno runs. and not only that they arnt very familiar with the JDM spec EJ20. but ill sure do it then, i think since i should have allready done it , ill install the parts i ordered, FMIC, Aps SR56 Turbo, 750 injectors, side fuel lines, Excedy Clutch n flywheel, and tune the ecu after that.

07-21-2008, 02:22 PM	#10
FlyingPerformance Authorized Vendor Car: 2008 STI Fav Mod: Coming Soon Location: Austin, TX Posts: 378 Join Date: May 2008 Trader Rating: (9)	Re: HELP....Pls (on Modifying my JDM STI) Edited due to the edit of the OP above post Last edited by FlyingPerformance : 07-21-2008 at 02:29 PM.