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Discussion Starter #1
Say I could tune the fueling table in my ZX3; without any other modifications, what kind of gains would be had by custom tuning the fuel?

I guess the question really is; does Ford "dial back" performance in an attempt to maintain emissions on the ZX3? (or for any other reason)
 

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you'll barely see any power from this... espically on a bone stock motor...



"Speed is money, how fast do you want to go?"



no matter how hard you try, this statement will ALWAYS be true...
 

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Discussion Starter #4
Thank you for your replies. I'm assuming there is no tool for you guys to tune your fuel/spark tables? (I see a lot of posts about tuning, but it's always a professional service... no mention of software)

Say I were to add spark tuning to that mix, would the gains be greater?

All of this is in preperation of establishing a "best motor" tune for a baseline for improvements... I don't want to claim outrageous HP gains after a modification because the engine was in poor tune to begin with, but was spot-on after the mod.
 

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You'd be surprised what you can get on some vehicles this way, though granted on the Focus I'm not knowledged enough to know if it works the same...but on my 01 Escort ZX2, there was an extremely cheap ($5) potsometer (or whatever it is called) mod that advanced fuel timing either on a switch, or with a black-box type device, it could be throttle-activated. Some only saw minor gains on a dyno(1-4) others saw large gains (6-12wph dyno-proven).

Just food for thought.
 

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Discussion Starter #6
I have the ability to tune the fuel and spark using a "piggyback" type of ECU which lets the stock ECU control everything else like it normaly would...

I think there's probably enough to be gained from this method to warrant the work; I'll do a couple of dyno runs before I start, though. When I'm done I'll do another to see how much I can get out of the motor.

I'm guessing Ford has choked this motor quite a bit in software...
 
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