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scarceller scarceller is offline
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Join Date: Oct 2006
Location: Southern MA
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Garage
Quote:
Originally Posted by Lorenfb View Post
"Stop making this sound so simple please!"

But it is so simple that even high school auto shop students can do it,
i.e. a PC, an emulator, an app, and some dyno time as was done to
provide data for the OP.

The details are all here: Tests
Really?

What about understanding temp compensations for differing IAT and CHT temps?
What do you do about thermal run-away in a motor? How do you correct for this?

Simple? far from it to do these things correctly. Get these wrong and you melt a motor. I haven't heard any complaints about Steve Wong's work.

Bottom line is even the factory recognized the 3.2L maps where not optimal. They made incremental chip improvements from 84-89, why? Because they simply left power on the table as a safety margin in the early cars. What makes you so sure that the 89 chip is optimal? Have you actually ever tuned a 89 to confirm max torque under all conditions?

Finally, consider that most chip programming is done to accommodate modifications such as:
- exhaust
- intake
- cams
- ...
If you change any of these you really do need to re-tune. My personal 3.2L has many of these mods and the motor runs poorly with the 89 factory chip. But after a proper tune it wakes up. I can put either tune in the car and you can clearly tell the difference between the 2. Do not dismiss the need for re-tuning after major component changes.
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1984 911 Carrera Cab M491 (Factory Wide Body)
1975 911S Targa (SOLD)
1964 356SC (SOLD)
1987 Ford Mustang LX 5.0 Convertible
Old 06-27-2012, 06:03 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    #252 (permalink)