Mustang Gt 2015 A/F
#2
THE RED FLASH ------Moderator
You do realize that boosted cars are optimized to run within the lower 11.4 - 11.8 A/F right ?
The GT you have now is naturally aspirated and not forced inducted as your previous 2008 was.. Therefore your optimal A/F ratio for a naturally aspirated application should be within 12.5 -12.9 at WOT !
The GT you have now is naturally aspirated and not forced inducted as your previous 2008 was.. Therefore your optimal A/F ratio for a naturally aspirated application should be within 12.5 -12.9 at WOT !
#4
THE RED FLASH ------Moderator
#7
THE RED FLASH ------Moderator
#8
Tasca Super Boss 429 Member
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Running a little rich in an NA motor with 11:1 pistons probably isn't a terrible thing. My supercharged '07 GT ran 11.6 AFR at WOT. My NA '14 GT runs low to mid 12's AFR at WOT, but that's a custom tune. Not sure what it ran stock, but a little rich wouldn't have bothered me.
#9
THE RED FLASH ------Moderator
Running a little rich in an NA motor with 11:1 pistons probably isn't a terrible thing. My supercharged '07 GT ran 11.6 AFR at WOT. My NA '14 GT runs low to mid 12's AFR at WOT, but that's a custom tune. Not sure what it ran stock, but a little rich wouldn't have bothered me.
My supercharged 06 GT has an 11.7 AFR at WOT which is normal and tuned correctly for a forced inducted application, however that's not the case when it comes to a naturally aspirated 4.6/5.0..
Just as you pointed out, your N/A 14 GT runs low to mid 12's AFR at WOT and for a custom tune, that's still considered as being somewhat on the conservative side..
At WOT, you should be looking at between 12.5 - 12.9 AFR safely with no issues whatsoever..
Now as for the 11:1 compression factor on the new 15's are concerned, perhaps that's why the AFR from the factory is 11.6 ? But that still seems really low at WOT for a naturally aspirated GT
#11
THE RED FLASH ------Moderator
I understand what your saying Brian, but running too rich isn't really safe for your engine components either !
#12
legacy Tms Member MEMORIAL Rest In Peace 10/06/2021
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I think the OP needs to take his Mustang to his dealer and have them look at it. Maybe the gauge is off? Let us know what your dealer says about it.......
#13
THE RED FLASH ------Moderator
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