Originally posted by SilverSmith82
The only thing tuning an A9M will do is bump the timing up. I just did that today myself with a timing gun. That's why there is no point to getting chips for fox mustangs, they just bump timing. Now I don't have to worry about getting all the settings right with a tweecer, it's just plug and play. Again, I got the entire old style PIH setup for LESS than a tweecer and all I did was swap computers and go, no messing with anything.
I feel I have to reply to some of your opinions above.
But first, I'm glad you got a gain by going with fox pcm.
You are correct about some chips and the fact that very little is changed with them to improve performance but that is not the case with all chips.
A chip tuner who knows their stuff and use equip that gives them access to all options (Autologic & the like) can do just about anything that is needed for power or drivability or both.
Anybody with basic knowledge of the fox or Sn95 pcm strategies can also manipulate the pcm to their satisfaction with a tuning device just like the chip tuners also.
I've used my Tweecer for power & drivability with very good results.
I got no prob with the Pro-M retro-fit fox pcm deal as a mod for more power but as pointed out by another poster, you still have a stock pcm and I would like to point out that it is an older one with technology that is not as flexable as the SN95 pcm.
The spark can be increased by twisting the dizzy, that is true.
Having control of the spark amount at a certain rpm, control of air to fuel at low rpm only, mid rpm only, or high rpm only can not be done with mechanical means, or control of drivability issues, these things and more can be done with a good chip or tuning device.
If your combo grows to the point that you need control over some of the above, the PIH mod will need a chip or tuning device.
I may not understand your post but it seems that you are saying that a chip (my words here, or tuning device) is usless.
That is not my findings based upon my experience.