87oct vs 93oct dyno sheet???

jrsimon27 said:

I have searched for this over and over and dont seem to fine nothing on this subject as oppose to other forums where members do this comparrisons for the help of the comunity.
Why?

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fewt said:

There's still data out there, but getting harder to find now that the Coyote motor has been around a while. These were the numbers for the 2011.

Horsepower

412 hp @ 6,500 rpm, 91 octane
402 hp @ 6,500 rpm, 87 octane

Torque
390 lb-ft @ 4,250 rpm, 91 octane
377 lb-ft @ 4,250 rpm, 87 octane

Based on that math it's probably safe to assume that the 2015+ at 435HP on 91 (Ford published spec) would be around 424HP when running 87.

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BmacIL said:

What the above doesn't show you is the fairly substantial difference in the midrange from going to 93.

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91 vs 93: Final run it made like 3 rwhp more and 0 rwtq more than the two best 91 octane runs.

87 vs 93: 6 RWHP peak difference. Not that much, but look at the difference in the mid range, especially 4500-6000 rpm. Looks to be ~20 RWHP difference in places (corresponding increase in torque, of course)

5.0 GT Stock dynos 91 octane vs 93 octane

First two runs the car made essentially NO more power.
Then on the third and final run it made like 3 rwhp more and 0 rwtq more than the two best 91 octane runs.

They probably put in the ability to adjust up to 91.5-92 on the high rpm range which gives it a couple extra hp but no additional torque.
I think we can safely say using 93 octane instead of 91 octane gains you 3-4 hp up in the higher rpms for a bit, but as you can see it's not sustained over a large rpm range. So it just may be an anomaly that it made the additional 3 rwhp at the peak.
So 91 octane state people don't need to feel bad, without a tune, guys in 93 octane states aren't getting really any more power out of their stock 5.0's

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http://themustangsource.com/forums/f726/5-0-gt-stock-dynos-91-octane-vs-93-octane-487398/

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87 vs 93 Octane Dyno Graph

Below is a dyno graph showing the difference between 87 octane and 93 octane. According to the shop, no other changes were made to the car/tune/etc. Similar weather for both passes, car at normal operating temperatures.

Note: 6 RWHP peak difference. Not that much, but look at the difference in the mid range, especially 4500-6000 rpm. Looks to be ~20 RWHP difference in places (corresponding increase in torque, of course).

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http://themustangsource.com/forums/f726/87-vs-93-octane-dyno-graph-484635/

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AlmostFamous said:

2 stock 2011-2014 Mustang GT dynos. 91 vs 93 and 87 vs 93.

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