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Discussion Starter #1 (Edited)
Ripped Up and Rolled on Part 1

2018 F150 5.0, Stock Hankook Dynapro AT-m Tires at 38 Psi, Stock Platinum 20" wheels, 3.31 Gear.

Stock exhaust, stock intake.

Base Line Dyno Pulls with the Stock Tune Done in 5th gear.

93 Octane 348rwhp and 386rwtq

Whipple Super Charger Install April 2018

Inked2018 Ford F150 Base Runs-1_LI.jpg

 

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Better numbers than I thought for the 5.0
 

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Discussion Starter #3 (Edited)

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Good question. But for whatever reason, I'm leaning to a lower gear than 1:1 when the time comes.

Maybe it yields lower numbers? I don't know all the reasons. Regardless, I'm not keen on multiple runs at speeds that seem so un-truck like.
Not worried about the motor. More concerned with the rest of the drive train.
 

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Ya using any gear other than one that is 1:1, or as close to 1:1 as possible, will give different dyno results. It increases/ decreases the mechanical advantage the motor has to the wheels

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Discussion Starter #8

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Discussion Starter #9
Ya using any gear other than one that is 1:1, or as close to 1:1 as possible, will give different dyno results. It increases/ decreases the mechanical advantage the motor has to the wheels

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5th gear dynos lower numbers then 7th
 

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5th gear dynos lower numbers then 7th
Really? I would have thought 5th would produce higher numbers because it's a lower gear.
I must admit tho I don't know much about dyno's

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Speed limiter is the reason. And lower gears read lower numbers. For better power figures you want the 1:1 ratio, but.... 7th gear at 6000 rpms is like 170 mph wheelspeed. Pretty sure it would chuck the driveshaft out the truck at that speed.
 

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Can someone explain why a higher gear gives you higher number on a dyno. I don't get it. Wouldn't 4th gear let the motor turn the wheels easier than 5th because of the mechanical advantage of the ratio?

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Can someone explain why a higher gear gives you higher number on a dyno. I don't get it. Wouldn't 4th gear let the motor turn the wheels easier than 5th because of the mechanical advantage of the ratio?

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That's how I see it as well. More torque multiplication should yield higher numbers.
 

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Can someone explain why a higher gear gives you higher number on a dyno. I don't get it. Wouldn't 4th gear let the motor turn the wheels easier than 5th because of the mechanical advantage of the ratio?

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I imagine it might be like putting torque on a bolt. The less resistance the bolt offers the less torque u can apply. The more gear you have the easier it is to spin the drums and the less the engine can push against it.
 

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Boosted engines typically will show higher numbers in higher gears, not as significant with a n/a motor typically. At least that’s my experience on my personal dyno (mustang awd 500) which is load bearing, inertia dynos my be different however.

Reason mechanical advantage doesn’t really come into play is because part of the calculation on dyno is wheel speed acceleration vs rpm. The other part of the equation on my dyno come from the load cell attached to the eddy current brake. I dyno in lowest gear I can keep the wheels from spinning on the rollers but high enough to have good resolution in the data log.


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Yep. They easily earn the 20 hp higher rating over the 3.5TT now. Whereas before the power output was definitely in line with the 385 hp (possibly even was overrated)
 

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I wanna see a 2018 5.0 with Garrett g series in a twin scroll setup. If someone makes a kit I will never look at another ecoboost.
 

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Discussion Starter #20
I wanna see a 2018 5.0 with Garrett g series in a twin scroll setup. If someone makes a kit I will never look at another ecoboost.

Hellion can get you done

one nice thing about the coyote is, you can get tuned no matter what power adder or combo you go with.
 
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