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Old 07-19-2009, 10:13 PM   #5 (permalink)
bwilson4web
Engineering first
 
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Join Date: Mar 2009
Location: Huntsville, AL
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17 i3-REx - '14 BMW i3-REx
Last 3: 45.67 mpg (US)

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Quote:
Originally Posted by tasdrouille View Post
Bob, where do you put your brake? BSFC maps are produced with the engine on the dyno. You work off road load. Results will obviously be different since there is a whole lot of stuff between the road and the crank, and this load is not a linear function of rpm.
I have a Graham miniscanner and it reports MG1 torque. There is a fixed ratio of 28:100 between the ICE and MG1 so I can calculate ICE torque. With ICE rpm, I have the operational power and combined with injector timing, I have everything needed. <grins>

Bob Wilson
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2019 Tesla Model 3 Std. Range Plus - 215 mi EV
2017 BMW i3-REx - 106 mi EV, 88 mi mid-grade
Retired engineer, Huntsville, AL
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