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Old Jul 21, 2020 | 10:53 AM
  #21  
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Also, be sure that the road your logging on is nice and straight. If you get any wheel spin or hit bumps/divots in the road you could get blips of data that skew the graph.
I typically log 2-3 runs just to be sure I get some solid data.
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Old Jul 22, 2020 | 06:40 AM
  #22  
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The problem I was having was that I wasn't logging a pod for time elapsed. I added that and I was able to make it work.
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Old Jul 22, 2020 | 12:26 PM
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Well I did a little more playing with it. This is what it came up with, seems quite low to me lol. This is figuring similar aero to Ecks and 6100lbs+150lbs for curb weight and driver. I do have LT275/60/r20s that are heavy BFG KO2s and the wheels are heavy OE 20s from a 15+ but I feel like it should still be higher up around 330ish. I have a set of 15+ 17s and P265/70r16 tires to swap over for the drag strip. Might be doing some logging with those in the next few days for Oz. Looking at the MAF readings between the 2 logs Boss manifold (red) was 38.9lbs and the Edelbrock (blue) was 41.7lbs in nearly identical DA. Red run is with e85 and Oz Omega and blue run is with OrtizPerformance 91 tune. Going back to Oz for the Omega's versatility daily driving. Might get an Ortiz e85 tune later down the road but that's also another $300 i don't have to spend


Last edited by Dapepper9; Jul 22, 2020 at 02:55 PM.
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Old Jul 22, 2020 | 04:06 PM
  #24  
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Honestly i know you don't wanna hear this but that's not THAT far off. Your aero may well need to be compensate for better accuracy.

As it sits i would think it's within 10%.

Try adding additional frontal square area until it looks more realistic (300-315 hp)
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Old Jul 22, 2020 | 04:53 PM
  #25  
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Did a quick google search and a rule of thumb is to calculate the square footage and multiply by 85%.
So 80"(w) x 77"(h) = 43 sqft
43 sqft x 85% = 36.5 sqft <== try that
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Old Jul 22, 2020 | 05:12 PM
  #26  
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Originally Posted by Ecks
Did a quick google search and a rule of thumb is to calculate the square footage and multiply by 85%.
So 80"(w) x 77"(h) = 43 sqft
43 sqft x 85% = 36.5 sqft <== try that
So I compared the lightning and srt10 ram in the link you posted earlier and kinda arbitrarily picked 36 even as just a guess so that's kinda funny I got that close lol.

I also found this link where Ford talks about the "new" 2009 trucks aero and how pickups are 0.4-0.45 on average and the 2009 f150 came in on "the low end of 0.4" which means it could be anywhere from 0.40-0.44 lol. I set the VD to 0.46 for the level and larger tires as a guess. I think that's probably pretty solid.

Covid panic has us on a stupid split shift thing where I'm only working Mon-Wed 12/day and Thursday is a 4hr "telework" day. Kinda hard to telework as an aircraft mechanic lol but it's so we get our 40 to retain insurance. But that means i have plenty of time off for doing things like stripping the truck down for the drag strip Friday night! Tonight I'll get wheels/tires swapped over and get some logs tomorrow before I pull the tonneau, tailgate and rear seat. Should be interesting to exactly how much the heavy 33/20s are hurting things vs stock. Maybe with the new Edelbrock I can do better on the strip than last time. Should be a fairly A-B test since the truck will sit identically for both outings and our DA is pretty consistent at 3-4000

Anyway here's the updated aero chart. Pretty identical just about 10 numbers higher or so. Not using weather correction, I used the weather from the days I made the runs which both days were as identical as you can really get. I'll post up more logs when I get em. This old Gen 1 isn't impressive by any means but for me stuff like this is just fun as can be lol


Last edited by Dapepper9; Jul 22, 2020 at 05:22 PM.
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Old Jul 23, 2020 | 10:49 PM
  #27  
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Here's my test tonight. I was on a different "track" than my normal one... needed more room. I was able to run 5th gear. E85, pretty much a full tank and just me. Ran two runs back to back. I don't know if it coincidence but the auto filled baro and temp was my local weather.



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Old Jul 27, 2020 | 08:27 PM
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Here's Stock E85 vs Lund E85R. I've got about about 6 gallons of E85 left; I'm gonna run it down and go ahead and put some 87 octane in it just for comparison sake. It's definitely gonna be important to find a nice, flat track... unfortunately neither of these runs were on a perfectly flat track. I'll keep searching.



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Old Jul 27, 2020 | 09:07 PM
  #29  
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So I know how to change the data itself but how did you relabel the AFR & Boost titles? I like the idea of changing the AFR to show timing instead.



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Old Jul 27, 2020 | 09:13 PM
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Originally Posted by Ecks
So I know how to change the data itself but how did you relabel the AFR & Boost titles? I like the idea of changing the AFR to show timing instead.
LOL, I just used a paint program to put a text box over the top... I tried to find where to change it but I couldn’t.
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