6400 rpm too high of a shift point? - Page 3 - Ford Mustang Forum
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Agreed. I had sent Brent an email and he kinda thought the same thing. This is why I want a dyno tune soon!

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Originally Posted by Brenspeed_from_Email
Normally you can see a gain in .5 A/F richness when reading at the engine, not at the tails. So if you are running 13.5 at the tails you are most likely 13.0 at the engine. BUT normally people see 12.9 A/F at the tails with that same tune if you are running ours. There could be variation in your MAF size. If the MAF housing has any variation at all you will see the cars either richer or leaner than others. So if the MAF is slightly larger than original specifications you will see the A/F go lean.



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Quote:
Originally Posted by 65sohc
I notice your AFR is around 13.5:1, quite a bit leaner than most of the tunes which are usually in the mid to upper 12's.
I'm with 65sohc. It looks like it gets to 14:1 on the second run. I'd be alarmed about that.


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This is true, 14:1 is good for Idle, but not for making power at WOT

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14:1 at WOT can make engine go boom if it's run that way for a long time.

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Quote:
Originally Posted by stlwagon
Noticed that your hp & tq curves cross right at 5000 rpm. Should be right at 5252. I wonder why it's lower?
If you look close the scales are diferent for the hp & tq so if you look at 5252rpm it is making about 260 HP & TQ @ 5252.
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