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Old 09-29-2006, 12:37 PM   #1
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Best computerized up grade

Hey I am new hear of course, And of course I need some input. I want to do a computer (piggyback) upgrade. And of course i want to know which ones are compatibal, and which is the best one to use. I was looking to go with a Apexi but I cant find out if they are compatibal, I would appreciate the imput. Thanks


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Old 09-29-2006, 01:05 PM   #2
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You dont need a piggyback. Get an SCT xcal2
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Old 09-29-2006, 01:19 PM   #3
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piggyback's don't work on the focus
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Old 09-29-2006, 01:24 PM   #4
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Quote:
Originally posted by crazymechanic
piggyback's don't work on the focus
That's a pretty broad statement...LOL

The Pectel harness setup is essentially a "piggyback" and it works awesome. You leave the stock ECU alone and just run the fuel and spark with the aftermarket ECU. You could do it the same way with any ECU that can run off a 36-1 trigger wheel and run a coilpack.

A true speed-density system (MAP-based) is the only way to accurately tune a serious blown/turbo setup. They tune very quickly and the fuel and spark can be tuned very accurately to each different boost level. Obviously, given enough time and money, you can make a chip-tuned stock ECU work...but they definitely have their limitations.

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Old 09-29-2006, 01:27 PM   #5
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can you explain how they work I don't understand. Each time I add an upgrade do I need to buy a new program to include that new upgraded part. Or do these work like a Apexi AFC but through the OBD2 port. I know I sound like a dumb@@@ But I don't want to buy one and find out I have to spend more money to download programs. I would appreciate the input
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Old 09-29-2006, 04:12 PM   #6
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Quote:
Originally posted by turbo joe
That's a pretty broad statement...LOL


A true speed-density system (MAP-based) is the only way to accurately tune a serious blown/turbo setup. They tune very quickly and the fuel and spark can be tuned very accurately to each different boost level. Obviously, given enough time and money, you can make a chip-tuned stock ECU work...but they definitely have their limitations.
Easy now , i dont have any isues tuning 732HP on mine and im sure it would do as good a job at 1000HP as it is now , I wouldnt say there is any limitations to the MAF type stock ECU setup ,Granted a speed-density would take less time to tune because it can be done in real time , but that is being played with now as well with MAF and the stock ECU

There are MANY piggy-back units that will work on the Focus
Pectel
Haltec
Uni-Chip
Etc
They all are good , the Uni-Chip will do either MAF or speed-density

To do your tuning if you are wanting to do your own tuning the SCT ProRacer Package is what you want and i have them for 595.00

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Old 09-29-2006, 04:14 PM   #7
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Quote:
Originally posted by the1cov
can you explain how they work I don't understand. Each time I add an upgrade do I need to buy a new program to include that new upgraded part. Or do these work like a Apexi AFC but through the OBD2 port. I know I sound like a dumb@@@ But I don't want to buy one and find out I have to spend more money to download programs. I would appreciate the input
If you buy a Diablo Predator from me (350.00) you get free lifetime upgrades for when you change stuff , Just shoot me an email of what you changed and i will email back the new tune

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Old 09-29-2006, 04:28 PM   #8
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If tuning time is free for you, then I could see how that would work fine. If you're paying $100-150 an hour for dyno and tuner time, then 10 minutes every programming change can add up quick.

That and the fact that you can't tune for a certain amount of boost...only a certain amount of mass flow...and those two don't always match up. Again, you can make a certain combo work with enough tuning time...but you can do it more accurately at various pressure levels...faster...with a speed-density setup. You can do what you want to do quickly and put the fuel or the spark where you need it.

BTW -- that's a pretty good deal on the SCT package. I've been thinking about getting one to mess around with on my driver.
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Old 09-29-2006, 07:35 PM   #9
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Agree "time" is the biggest issue i think , Yes the ECU seing boost would help some but with messing with the MAF systems as long as i have im kind of coming to the conclusions the ECU could care less about seeing boost

With some new stuff im playing with the stock MAF/ECU system will be able to be tuned in real time just like a pectel/AEM/Fast system is but i cannot say more then that yet

That is a heck of a deal on the PRP

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Old 09-29-2006, 08:09 PM   #10
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At any one point, I'm positive you can make it right or right enough.

It's all the places in between or if you change boost levels that you have a problem. You can make it right at 5, change it to 20, make it right...go back to 5 and it's still good there. You just get to slice it like you want to and deal with that part of the curve, then move on to the next part without any effect on the stuff you've already done.

Hell...LOL...they make Funny cars go in the 4s with a big-ol' super soaker.
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