Fuel Issue

[boomergt]

Hey everyone, first I would like to say Thanks to Ken from protegegarage for inviting me to this forum..

I have a slight fuel issue and am starting to work through and I figured I would ask this forum. I have spoke to a few vendors about this already..

I went to get my unichip tuned a while back.
Mods were: 3" turbo-back exhaust, MAM FMIC, MAM Manifold, colder plugs, bored TB, unichip and wrx 440injectors.

The problem was that the unichip can only raise and lower fuel by a %, it cannot scale. So at low RPMs the tuner was not able to pull enough out. This would cause some hesitation and rich AFR's at low RPMs.

I am now building my engine, and putting a GT28rs on.. along with some other mods..

I am looking for 300 to the wheels on a load based dyno.
I would like to keep the unichip since I already have it.

What would be the best way to resolve this issue. I was thinking I could take out the WRX injectors and put the stock ones back in. Then add 2 additional injectors to the charge pipe and get a second unichip module to control them.

I could get a FPR to adjust also...

What do you guys think I should do, also to make that power am I overlooking anything I might need??

TIA.. Sorry so long winded..

[Mental Addiction]

Tom,

I would dump the uni chip for a standalone. You have reached that area where you need to Graduate to the next level. Standalone will provide you with the things you are needing. EM is very important and should never be taken lightly. The Microtech/Steve are great units and might be what you need. You also have the AEM(more features and complex,if you don't use the features don't spend the extra money) and Haltech.

[boomergt]

Hey Beau, I know this is probably the way I should go. Here is my issue, I am no tuner nor do I have the proper items to tune (Load based dyno). I don't feel that in MN we have any tuners that realy know there stuff. There are a few tuners in IL that I kind of feel like they know what there talking about. I might have to call out there and see what EMS's they can tune... Or I might have to make a really long drive to your shop..

Does the microtech do scaling. I though it was just like the unichip in that area. If that is the case wouldn't I have the same issue?

Tom,

I would dump the uni chip for a standalone. You have reached that area where you need to Graduate to the next level. Standalone will provide you with the things you are needing. EM is very important and should never be taken lightly. The Microtech/Steve are great units and might be what you need. You also have the AEM(more features and complex,if you don't use the features don't spend the extra money) and Haltech.

[Mental Addiction]

Hey Beau, I know this is probably the way I should go. Here is my issue, I am no tuner nor do I have the proper items to tune (Load based dyno). I don't feel that in MN we have any tuners that realy know there stuff. There are a few tuners in IL that I kind of feel like they know what there talking about. I might have to call out there and see what EMS's they can tune... Or I might have to make a really long drive to your shop..

Does the microtech do scaling. I though it was just like the unichip in that area. If that is the case wouldn't I have the same issue?


I can't speak on behalf of the Microtech. I have not played with the software. However Steve is a standup guy so I'm confortable with the Microtech.

[Mr.Win]

All you need is a long streach of road to do tunes.

Beau is correct, your stepping up with the big boys, its time to protect all those investments under the hood. Several of us on this board can preach to you the importance of doing it right the first time.

EDIT: The microtech should not give you any problems. Steve is on this board under the name NSNMotorsports. For someone in your situation- the microtech is the most user friendly EMS out there IMO

Beau did you get the AEM working full standalone?

[terbow]

besides all that, why get a 2nd unichip. that would be WAY more expensive than getting a standalone or even an extra injector controller (counting you paid for the first one). so thats not so economical

[boomergt]

Sorry I should have explained... I can get a second unichip module for $100. This will allow me to control several options like water/meth injection, additional injectors. I would not buy a new unichip by any means.

I am actually kind of upset when I bought it.. But at that point I was not going to build my engine... We all learn after our mistakes..:)


besides all that, why get a 2nd unichip. that would be WAY more expensive than getting a standalone or even an extra injector controller (counting you paid for the first one). so thats not so economical

[boomergt]

I will probably have to PM Steve about this. From my reading the Microtech also adjusted fuel by percentages. Which in that case I would still have this issue.

At this point I am open to a new EMS, but also need to figure out if I can keep my wrx 440cc injectors and get a proper tune or get additional injectors...

By the way thanks for all the comments so quick...

[terbow]

yea very true. my ems is goin in next mon or tues (depending on when iget done with a customers car), so i can let u know how the whole standalone thing goes. cause well i have to learn it all myself. if ur compitent it shouldnt be hard. plus u got all of us here to help.

[terbow]

I will probably have to PM Steve about this. From my reading the Microtech also adjusted fuel by percentages. Which in that case I would still have this issue.

At this point I am open to a new EMS, but also need to figure out if I can keep my wrx 440cc injectors and get a proper tune or get additional injectors...

If you get a standalone the 440's will work. usually they have u just use bigger primaries so they should be fine.

[Mental Addiction]

But at that point I was not going to build my engine... We all learn after our mistakes..:)
(boom7)

[Aric]

the fine tuning is done by adjusting the pulse width of each injector for a given load and RPM range.

You can compensate for different sized injectors by changing the fuel trim. in effect it adjusts all of your settings in each rpm range. you could do it manualy but that takes more time.
with most standalones you can add as much or as little fuel as you want, say if you wanted to run 0ms of fuel at 5500rpm at full boost just to blow your stuff up you could.

[Ken@ProtegeGarage]

what he is saying is that the unichip does not allow you do that. my understanding from unichip is that they are working on a map for larger injector systems but i would not hold my breath. it basically requires starting from scratch and to use a tired excuse "dead platform with limited number of cars made..."

[Aric]

what he is saying is that the unichip does not allow you do that. my understanding from unichip is that they are working on a map for larger injector systems but i would not hold my breath. it basically requires starting from scratch and to use a tired excuse "dead platform with limited number of cars made..."
yeah because its just a piggyback, like using an S-AFC on a neon when you put a huge cam in it.
to get the car to idle right you need to pull tons of fuel, but then you actualy run the chance of not having enough fuel at the top end.
he is having a similar problem since he is to rich at idle, since the unichip uses whatever the stock ecu says it can only adjust/fine tune the stock map.


I forgot to quote his message about the Microtech in that last post btw.

[Bigg Tim]

If it's a cost issue, throw the stock injectors back in, use those 440's as xtra injectors and get the module so you control the xtra injectors. That is your cheapest bet as long as the module can control the xtra injectors more then just by a percentage. It should allow you to control it via IDC. If not, there's always another piggy that is easy to tune, cheap and keeps the car running like stock outside of boost, so boost tuning is ALL you have to do!.;)

[terbow]

plus at 300whp you'd want something that you can tune yourself, itll help you respect and know the car more. cause well at 300hp proteges are no longer grocery getters :)

[NSNMotorsports]

Well I guess I'm not 100% sure on the questions that need to be answered... but here are a few quick easy points:

1) A long stretch of road and ideally a co-pilot and about 40 minutes is all you need to lock in a solid tune on the Microtech.

2) The Microtech is a full grid 16x16 injector fuel map system where you set the opening times of the injectors at each given load vs rpm point. The adjustment is not done by typing in a number but rather by pressing up or down and it automatically adds/subtracts ~.02ms to the injector time at that point. So you have very specific and tight control. Correction factors for air and water temps and so forth are done with percentages, but that is the industry standard for ALL EMS's.

3) I have a mini step through tutorial on these forums at:
HERE (http://www.flyinprotege.com/forums/showthread.php?t=365)

[boomergt]

I just want to thank everyone for you input. I talked with Steve today.. I will be selling unichip and going with the Microtech..

I will keep you all updated on me progress.

[tekkie]

you wont be sorry, unichip if ok if your just doing basic things and thats about it, even then I still think its overpriced :D