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BlueWaffle

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That is the million dollar question right there. That's gonna be different for every transmission, gear ratio, tire and wheel combo out there.

General rule of thumb I've always heard was 15% for manuals, and 20% for ATs. But I dunno how close the Bronco is to those.
Slightly different yeah.. FWDs have the least amount of parasitic loss largely thanks to not needing to change the direction of drivetrain rotation 90° before power reaches the wheels.. widely accepted that a FWD will sap 10-12%.. rwd will steal 15-18% and awd/4wd systems especially while IN 4wd can be up to 25%

Very rough generalized figures though as you said.. the weight of various rotating parts will have an affect as well as if it's a manual or auto.. but.. with a little digging on the interwebs concerning dynosheets and stuff and then doing a little bit of math will get a guy reeeeal close to figuring out actual CHP figures.
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ericwmedic

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It shouldn't be that difficult (or as you say.. a lot of extra steps) to deduce what CHP would be after you know what WHP is.. or is it?

Presumably you'd just have to take the WHP figure and then simply add whatever the percentage of power that's lost through the driverrain and end up being close enough..

I'm slightly under the influence right now though so... I could very well be way off base lol.

You can likely make a good guess, especially if you get a "before" dyno without any other power-adding mods. If, for example, you know you made 260hp at the wheels on 93 octane, Ford rates the 2.3L at 300hp on 93 octane. That would mean you're losing 40hp via the drivetrain, so call it 15% (for fudge factor/ dyno differences). Now, with all of the bolt ons and a tune, you're at 360hp at the wheels. Add back in your 15%, and you're making ~414hp at the crank.

What I mean by the "extra steps" would be removing the engine from the Bronco, taking it to someone with an engine dyno, and running it. That would be the truly reliable way to get a crank hp number for your particular engine. It sounds fun, but I'll let someone with deeper pockets tackle that project.
 

EvilJim1971

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What I mean by the "extra steps" would be removing the engine from the Bronco, taking it to someone with an engine dyno, and running it. That would be the truly reliable way to get a crank hp number for your particular engine. It sounds fun, but I'll let someone with deeper pockets tackle that project.
And running it with the full factory exhaust and air box.
 

BlueWaffle

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You can likely make a good guess, especially if you get a "before" dyno without any other power-adding mods. If, for example, you know you made 260hp at the wheels on 93 octane, Ford rates the 2.3L at 300hp on 93 octane. That would mean you're losing 40hp via the drivetrain, so call it 15% (for fudge factor/ dyno differences). Now, with all of the bolt ons and a tune, you're at 360hp at the wheels. Add back in your 15%, and you're making ~414hp at the crank.

What I mean by the "extra steps" would be removing the engine from the Bronco, taking it to someone with an engine dyno, and running it. That would be the truly reliable way to get a crank hp number for your particular engine. It sounds fun, but I'll let someone with deeper pockets tackle that project.
Yeap... Thats definitely a level of fun I'll let someone else have. I don't wanna get greedy after all.. gotta leave some fun for the rest of you guys 😂
 

Q1svt

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Dyno Results:
Stock, Ford Performance, PandaTune
93 Octane. Mods: Intake, Exhaust, Intercooler

Ford Bronco Bronco 2.3L PandaTuning is HERE! 🚨🔥 788948-b5eb79c4cfc22a6ef4acdb481e7814a6
Nice information…
Can you verify the base run configuration?
Was it in ‘normal’
What if any Bronco modifications? Your pictures show over sized tires.. other changes?

Interesting that your base at wheel is same(ish) as this 2024 2.3l MPC…

Thanks for anything you can share.

Ford Bronco Bronco 2.3L PandaTuning is HERE! 🚨🔥 IMG_8716
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