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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 03-03-2013, 08:21 AM   #1
Maxspeed
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What would my crank horsepower be?

I dyno'd at 450 rwhp. Using a 20% loss from crank to rear wheels I estimate my crank hp to be about 560. Does that sound correct? I want to make a show board and want to be as accurate as I can be.
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Old 03-03-2013, 08:26 AM   #2
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15% for a manual. 20% for the auto
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Old 03-03-2013, 09:13 AM   #3
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I have a fact sheet I use at car shows - etc and I list mine like this:


Estimated Flywheel HP (15% drivetrain loss): 540 HP

Dyno Tuned Rear Wheel HP: 461 RWHP / 440 RWTQ


I prefer to be right up front about where the numbers come from. So I list it both ways to satisfy those who know what rwhp is versus those that don't.

I went with the consensus opinion on this forum of 20% loss for an auto and 15% for a manual.
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Old 03-03-2013, 10:00 AM   #4
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Quote:
Originally Posted by SSDan View Post
I have a fact sheet I use at car shows - etc and I list mine like this:


Estimated Flywheel HP (15% drivetrain loss): 540 HP

Dyno Tuned Rear Wheel HP: 461 RWHP / 440 RWTQ


I prefer to be right up front about where the numbers come from. So I list it both ways to satisfy those who know what rwhp is versus those that don't.

I went with the consensus opinion on this forum of 20% loss for an auto and 15% for a manual.

^^ most honest way to do it in my opinion
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Old 03-03-2013, 10:00 AM   #5
Maxspeed
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Thanks guys. I have a manual but didn't know about the 15% factori will apply that. I also wanted to be honest on my board and list both. I want an accurate estimate of crank and not embellish. I will word mine just like yours Dan.
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BUILD
TIMING CHAIN FAILURE
TRANSITION FROM STOCK TO CAM VID
AFTER DETAIL PICS
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