[Power Hungry]

Originally Posted by travisunderwood

I have read this whole thread and left with some unclarities.

- Can both the chip and the gryphon adjust speedo for wheel size changes?

Neither can. The 7.3L Speedometer is handled in the by the ABS Module and must be reprogrammed with the factory service tool.

- What about the stock computer code does the chip bypass and the gryphon does not?

Correct... mostly. There are ways to use the Gryphon to reflash the PCM away from an undesirable base code.

- will one see better MPG with the chip codes over the gryphon?

If both devices are running the same tuning, there's no difference in performance or economy between the Phoenix or the Gryphon.

- Both options appear to do shift points, is one easier on the tranny?

Same tuning, same results.

- I have a 99 F250 7.3 - does the gryphon have an egt probe to read temp, or would I still need a an egt gauge?

Yes, the Gryphon comes with a Pyrometer thermocouple so you are able to monitor EGTs.

Here are my goals:

- Driveability for highway and travel with the maximum MPG possible. Not looking for the most HP, smoke, etc.

The 65 an 80 HP Daily Driver tunes are designed just for that.

- Light towing

40, 65 and 80 HP Towing tunes would be good for that.

- occasional 'fun' factor

The 100 HP Performance would be a good "play" program.

- eventually will go to veggie conversion with a dual tank system

Minor tuning changes would make better use of a "veggie" system.

- reliability - could be taking this rig south of the border to costa rica

Tens of thousands of trucks run some sort of tuning or another and are just as reliable, if not more reliable, than stock.

Truck has 141,000 on it, brand new to me. 4inch exhaust, stock injectors, k&n filter (will replace with new intake - not sure on DIY or manufactured one), 4inch lift, larger tires (spacing on the size and it is -8 outside right now)

I am only really interested in mods that really help MPG for long distance traveling, of course some performance gains will be great.

Average gains with a good Daily Driver/Street calibration is 2 MPG with some vehicles seeing 3 or better.

Thanks
Travis

Please see the above highlights. I hope these help answer your questions. Let me know if there's anything else you need answers to.

Take care and happy New Year.