Bullitt Mustang Baseline Dyno Test & Tune - IMBOC
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post #1 of 10 (permalink) Old 01-09-2019, 04:43 PM Thread Starter

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Bullitt Mustang Baseline Dyno Test & Tune

Mighty impressive for a tune alone. 'Tuning By James' is the tuning genius behind many tunes, and, as I understand it, has done most of Steeda's tunes over the past decade.

YouTube
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WELCOME TO TUNING BY JAMES
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post #2 of 10 (permalink) Old 01-09-2019, 04:50 PM
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Nothing faster than a borrowed car! Pulling nearly 8000 RPM on a new engine. Wouldn't want that car.
Impressive power nonetheless.


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post #3 of 10 (permalink) Old 02-25-2019, 09:58 PM

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2019 Bullitt K2305 * 2001 Bullitt #1697 * 2005 Lincoln LS * 1990 Thunderbird SC * 1982 Bronco XLT
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post #4 of 10 (permalink) Old 02-26-2019, 05:38 AM Thread Starter

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The new Steeda tune, built by James, is pushing 550 HP, a 70 HP jump over stock- that's some damn fine tuning there and knowing both Steeda and James' sense of streetabilty, practicality and safety, that's damn awesome.
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post #5 of 10 (permalink) Old 02-26-2019, 01:12 PM

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The key here is what octane are they using? I would bet its 93 where some of us can only get 91 and that will not work!

Joe
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post #6 of 10 (permalink) Old 02-26-2019, 04:24 PM
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That's got to be pretty "tweeky" with those numbers. I just saw a you tube build on a coyote, with ported heads, headers, forged pistons and rods and a 91 octane tune, making ~560 HP. Then they put a big centrifugal blower on it and got +1100 HP! So......


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post #7 of 10 (permalink) Old 04-16-2019, 12:39 PM
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I called Steeda and ordered the tune and the X4 last week. They told me the tune in the video is the one we get emailed to us. 91 Octane.
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K3107 Mods: dual horns. Soon Steeda tune.

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post #8 of 10 (permalink) Old 04-16-2019, 12:46 PM
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Or the 2 PP1 Mustang GTs I was given to drive last year as a test drive. I didn't hit the rev limiter, but in 5 miles of driving, I put it on the freeway and exceeded 120MPH.

I just wanted to make sure it was the car I wanted. They said "drive it any way you want".

It convinced me to get my 2019 Bullitt with MagneRide. My 2019 had 44 miles on the odometer when I bought it new. I find it hard to believe those were "gentle" miles knowing full well the person who drove those miles wasn't going to be the final owner.

Personally, I do not believe it hurt a thing. I have owned too many high performance cars to believe redline out of the box really effects anything.

FoMoCo knows full well that some folks are going to bury the RPM as soon as it leaves the lot. Driving the car hard is better for it than babying it.

Just my opinion.

K3107 Mods: dual horns. Soon Steeda tune.

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post #9 of 10 (permalink) Old 04-16-2019, 03:36 PM
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The problem with most chassis dynos is that they don't compensate for the full weight of the car, actual traction and wind resistence. They are basically measuring how much power it takes to spin heavy rollers. Chassis dynos also don't usually compensate for temperature, barometric pressure, or relative humidity. Therefore, they are often, shall we say, optimistic in their horsepower numbers. Whereas, an engine dyno measures the actual horsepower of the engine, under load, and any improvements are pretty reliable and repeatable.
IMHO, FP has 3 stages of performance packages for the GT and their numbers seem to be more realistic. Warranty?
Ford's three packages are 1: 13 HP/16 FT/LBS torque, 2: 21 HP/24 FT/LBS torque (both gain 40 FT/LBS in mid range. And pack 3 is 60 HP @ 7500 RPM increase 5 FT/LBS torque (No indicated mid range improvement)
With a tune only on a Bullit, I'm thinking 5% tops. So, 20-25 HP on 91 octane, at the wheels. 457 HP sounds right.


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post #10 of 10 (permalink) Old 04-16-2019, 06:51 PM

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James emailed me the tune for $200, installed it, love it!
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