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Which ECU to choose

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Old Sep 1, 2004 | 10:45 PM
  #1  
subablunc's Avatar
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From: New Caledonia, near Australia
Car Info: WRX 04
Which ECU to choose

Hi guys !

I'm new here but not really a newbie ;-)

Forgive my approx. english...

I look for the best ECU for my goals and for my setup :

- catless TBE (Helix DP + Blitz catback)
- UP (Helix)
- APS CAI
- GFB MBC
- GFB BOV
- VF34

on a 04 WRX.

I'd like to install the ECU and the FP + pink injectors in the same time.

I was wondering which ECU to choose : Link, UTEC, or Power FC.

I'd like to get rid of the MAF sensor.

My goals ? Don't really know...300 + HP...

PS : there's no professionnal tuner where I live (island near Australia), so I have 2 options : make the ECU tuned in the US (and make it sent to me) or make the ECU tuned by a pro that involves make him coming here in New Caledonia...

Can you help me ?

Thanks a lot.
Old Sep 1, 2004 | 11:52 PM
  #2  
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Car Info: 02 Impreza WRX sedan
Origami posted by subablunc
I'd like to get rid of the MAF sensor.

My goals ? Don't really know...300 + HP...

PS : there's no professionnal tuner where I live (island near Australia), so I have 2 options : make the ECU tuned in the US (and make it sent to me) or make the ECU tuned by a pro that involves make him coming here in New Caledonia.
What do you plan to replace the MAF sensor with? MAP sensor, perhaps?

Professional tune should be done locally, if possible, taking into account your available fuel quality. You might contact MRT in Australia. They may be able to accomodate you with an ECU tuned to your mods and gasoline.

--
0==WW==0
"…axles of evil…" - george w. bush
Old Sep 2, 2004 | 02:01 PM
  #3  
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From: New Caledonia, near Australia
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Yes, MAP sensor.

I already contacted them. They say they can tune every ECU. Do you think Haltech or Autronic are too advanced for my needs ?

Problem : no one can precisely say, in New Caledonia, the real octane ratio we get at the pump (95, 96 ?). I think it's 95. What is sure, is that our gas contains lots of s.... ! Is the exact number very important for the tune ? I often mix Toluene with pump gas (no more than 30%).
Old Sep 2, 2004 | 06:27 PM
  #4  
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Origami posted by subablunc
I already contacted them. They say they can tune every ECU. Do you think Haltech or Autronic are too advanced for my needs ?

Problem : no one can precisely say, in New Caledonia, the real octane ratio we get at the pump (95, 96 ?). I think it's 95. What is sure, is that our gas contains lots of s.... ! Is the exact number very important for the tune ?
Standalone engine management like the Haltech, Autronic, or TEC3, are very good but usually reserved for much more race-only mods than a VF34, which has good streetability characteristics and is a commonly-installed street turbo. An ECU reflash usually suffices for this level of modification. As always, consult with the tuner for their recommendations.

The octane rating of your local fuel is important to the tuner if they have to design a custom map for your car by mail order. Since they will not have access to your car on a chassis dyno, they must build a little bit of safety into the tune.

Just be sure that whatever you specify as your octane rating is what you will normally use. Usually I would say that an octane rating of 95 is very good compared with gasoline in the U.S. but ours uses the R+M/2 (Research plus Motor octane, divided by 2) rating system. Most European countries use Research rating system only, which is the higher of the two rating systems. This might be true in your location, also. Just provide the information (a sticker?) on your local gasoline pump to your tuner. MRT or another good tuner should be able to take this information into account when providing a tuning map.

--
0==WW==0
"…axles of evil…" - george w. bush
Old Sep 2, 2004 | 08:31 PM
  #5  
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thanks a lot ! It's clear.

So when I read that octane rating in California is 91, that means the rating would be higher with the systems used by the Europeans ? I think here in NC we have the European system in use. If yes, what would be my 95 gas with the R+M/2 system ?

I like the UTEC or Link in that I can tune every time I install an aftermarket part : it's evolutive (not sure of the word, sorry).

What do you think of the Power FC for my 04 WRX ? And does it eliminate the MAF sensor ?
Old Sep 2, 2004 | 11:43 PM
  #6  
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Why do you want to remove the MAF sensor? Its a very important part of modern engine management and works well in the subaru. If you don't have access to a proffesional tuner, I suggest you get an autronic, Hydra, or UTEC and start learning about tuning it yourself. Its very difficult to provide an off the shelf map that will work well on different cars (even if they have the same mods), but nearly impossible to do so when the fuel quality is in question as well.

-- Ed
Old Sep 3, 2004 | 05:03 PM
  #7  
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From: New Caledonia, near Australia
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because of the issues with the MAF sensor as soon as CAI or so are installed...

I wonder if my APS CAI could cause problems : I'm not sure because the piping (of the new APS CAI) has been studied especially for the WRX (see the #65 inside).

Autronic seeems to be a very good standalone ECU (has got antilag as well). Do you have an idea of the price ? I didn't know it is user tunable...
Old Sep 3, 2004 | 05:48 PM
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Pretty much all aftermarket standalone ECU's can be user tunable. You just need the software. I don't think you should be so quick to toss out your MAF because of a CAI. There's a chance you will be able to tune it out just fine.

-- Ed
Old Sep 3, 2004 | 06:49 PM
  #9  
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EcuTek describes how to re-calibrate the ECU for use with an aftermarket intake with their tuning tools. Not impossible for the home tuner to accomplish but does require that both the stock airbox and aftermarket intake be installed in series, each with their own MAF. If you can fit this temporary system under the hood (bonnet), you might be able to drive the car in a straight line to measure MAF output from each sensor (one at a time, using EcuTek's Delta Dash data logging software). A professional tuner can log readings while running the vehicle on a chassis dyno under load.

--
0==WW==0
"…axles of evil…" - george w. bush
Old Sep 5, 2004 | 01:28 PM
  #10  
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From: New Caledonia, near Australia
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thank you very much !

I'll go for a standalone ECU I think, maybe UTEC also.

I'll let yu know.
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