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Old Nov 11, 2009 | 03:12 AM
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Thumbs up EFI Live Engine Dyno

So I got bored on my long drive home and set up my PIDS to monitor Engine TQ and HP. These always seem pretty accurate but the ones at the rear wheels aren't worth a damn.
I will try to get to a real dyno sometime for comparison but this sounds really really close to right.

388hp/366tq at the flywheel. Only took it up to 6300 in 2nd so I might bump it up a little tomorrow and try again. However I think that's where it peaks.

Scott, if you can post your dyno graph for comparison that would be great.
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Old Nov 11, 2009 | 07:56 AM
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damn that really is not far off. 315 at the ground is around 390 at the crank. what did you ever get with the gas mileage pids?
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Old Nov 11, 2009 | 07:57 AM
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I kinda use those PIDs to set my shift points. From the way i understand them, they basically measure acceleration, so when ever that HP number starts falling off, i basically know where to set my shift point...


Also if you look at the equation for HP

HP = gvmlb()*{SAE.VSS.mph}*dx({SAE.VSS.mph},6)/8226.63


There is a setting in EFILive where you can put in the vehicle weight, or i think it defaults to a certain weight based off of the VIN.
Edit -> Log File Information, click the Vehicle options tab... Updating this field will update the RWHP value..

Last edited by BlackGMC; Nov 11, 2009 at 08:21 AM.
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Old Nov 11, 2009 | 04:30 PM
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thats pretty neat. What were IAT temps?
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Old Nov 12, 2009 | 12:19 AM
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Originally Posted by dirt track racer 81
damn that really is not far off. 315 at the ground is around 390 at the crank. what did you ever get with the gas mileage pids?
Cruising level ground at 55 i was getting 22-23mpg. 65 more around 19-20.


I'll have to go back and look at the IAT's again, I forgot, It was nice out but not too cold.
Thanks for the tip Corey, I didn't know that. But I am going to bump it up a little and see if 6300 is the peak or not. more than likely is for that cam. Figure going a tad over would make up for the RPM drop on the shift.

The RWHP is always Irate, so will that fix the problem? It shows like 1100 hp at the RW and like 360ftlbs
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Old Nov 12, 2009 | 08:17 AM
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Originally Posted by viciousknid
The RWHP is always Irate, so will that fix the problem? It shows like 1100 hp at the RW and like 360ftlbs
I believe the RWHP only really works when your accelerating, everything else is garbage..
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