Attn: Mike or JC or any one that can help
01-29-2009, 01:45 PM
#1
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Attn: Mike or JC or any one that can help
So i'm wondering what would happen when if i put a 3" catless turbo back exhaust and a ARC airbox on my car. would i need to remap the ECU? or other stuff? any thoughts?
01-29-2009, 02:43 PM
#9
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Divorced d/p is better for the sti.
I have tactrix cable for openecu flash.. but it's still experimental cuz i haven't had time to figure out all the functions of the software yet.
Like Jerry say best to have someone flash the ecu or run AP.
Last edited by kenji815; 01-29-2009 at 03:02 PM.
01-30-2009, 08:47 AM
#14
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Lawson ok this is what i can tell you from all the BS years i had with installing and testing exhaust kits, with or with out cats, down pipes, divorced etc...
Blah blah bs...
You don't need an ECU reflash thats total BS!! and it's a money gimmick i have used it in the past but the fact is your going to gain what you will.
If you do an ECU reflash the exhaust will help you get more power because it will complement the timing advance, added boost, and other changes made to the ecu. Just by adding an exhaust you will gain 3-5% overall hp.
With that said... Eff the ECU reflash...
Get that exhaust toss it in the car and check for changes... you will notice the following things...
1. Less back pressure (you will feel like the car has less kick down low)
2. Free reving motor up top mid to up top.
3. Turbo spool will be louder and recovers boost much quicker on shifts.
4. i hope it's lighter than stock
5. Devorced wastegate helps reduce turbulance in the exhaust which is good for 1% of power gains if any.
People say that an exhaust helps the turbo spool up faster thats 50% BS! on a stand still an open exhaust will not do squat for you because there is no pressure, or air velocity in the system the trubo relies on the exhaust gast to get the blades spinning then it's starts to generate velocity in the exhaust side. So from a stand still YOUR TURBO WILL NOT SPOOK ANY FASTER! it will spool faster during shifts going into preboost then boost, thats one of the biggest benefits of the system.
Boost creep.... no such thing!!! unless your wastegate is sooo clogged with carbon that the flapper door does not shut in time. You will not get or notice any boost creep but if your doing 20+ lbs of boost and the stock wastegate is only rated for 8lbs spring tension 14lbs spring + Vac then you will have boost creep. in your case YOU WON'T and if you do it's simple to fix.
Blah blah bs...
You don't need an ECU reflash thats total BS!! and it's a money gimmick i have used it in the past but the fact is your going to gain what you will.
If you do an ECU reflash the exhaust will help you get more power because it will complement the timing advance, added boost, and other changes made to the ecu. Just by adding an exhaust you will gain 3-5% overall hp.
With that said... Eff the ECU reflash...
Get that exhaust toss it in the car and check for changes... you will notice the following things...
1. Less back pressure (you will feel like the car has less kick down low)
2. Free reving motor up top mid to up top.
3. Turbo spool will be louder and recovers boost much quicker on shifts.
4. i hope it's lighter than stock
5. Devorced wastegate helps reduce turbulance in the exhaust which is good for 1% of power gains if any.
People say that an exhaust helps the turbo spool up faster thats 50% BS! on a stand still an open exhaust will not do squat for you because there is no pressure, or air velocity in the system the trubo relies on the exhaust gast to get the blades spinning then it's starts to generate velocity in the exhaust side. So from a stand still YOUR TURBO WILL NOT SPOOK ANY FASTER! it will spool faster during shifts going into preboost then boost, thats one of the biggest benefits of the system.
Boost creep.... no such thing!!! unless your wastegate is sooo clogged with carbon that the flapper door does not shut in time. You will not get or notice any boost creep but if your doing 20+ lbs of boost and the stock wastegate is only rated for 8lbs spring tension 14lbs spring + Vac then you will have boost creep. in your case YOU WON'T and if you do it's simple to fix.