Re: Aug 23 2020 launch video; comments wanted
[Re: gregsdart]
#2815387
08/31/20 10:09 AM
08/31/20 10:09 AM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Graph of sunday pass, 8.854, 154.32 mph, 1.274 60 ft Any idea why the acceleration in high gear is choppy in the first half of high gear? Or why acceleration drops at top of 1st? It is more pronounced than other runs (1st gear dropoff)
Last edited by gregsdart; 08/31/20 10:12 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Aug 23 2020 launch video; comments wanted
[Re: gregsdart]
#2815439
08/31/20 11:24 AM
08/31/20 11:24 AM
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Joined: Aug 2003
Posts: 43,230 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,230
Bend,OR USA
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Last edited by Cab_Burge; 08/31/20 11:25 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Aug 23 2020 launch video; comments wanted
[Re: gregsdart]
#2815485
08/31/20 12:39 PM
08/31/20 12:39 PM
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Joined: Jan 2003
Posts: 19,376 Las Vegas
Al_Alguire
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Well from the distance cant tell much other than it appears to be dead hooked and tripped the 60' beams with something other than the front tire it appears. Looks like the G meter, which I assume is the second graph is shows the same. Converter is WAY WAY tight. Looks like flash is 62-6300 shifting at 77-7800 falling back to 6200ish is simple KILLING it. G Forces will fall steadily throughout the run from beginning to end. The "choppiness" could be many things but doubt it is anything major. Could be the way the recorded is mounted could be how it is mounted to could be tracks a tad rough. By the looks of it its choppy the entire run..Wouldn't read a lot into that. Plenty to fix with the dead hook and converter for now Id say. FWIW here is a more typical data log of a G Meter, also shows driveshaft and engine rpm
"I am not ashamed to confess I am ignorant of what I do not know."
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Re: Aug 23 2020 launch video; comments wanted
[Re: LSP]
#2815564
08/31/20 03:27 PM
08/31/20 03:27 PM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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That's enough HP to go 8.60's or better. Any bumps in the track at those points? Where does the convertor flash compared to the TQ and HP peaks? Smooth track. Converter flashes to 6200 to 6300, shifts are 7500 and 7300 on the 2/3. Torque peak 5400, hp still climbing a touch at 7200.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Aug 23 2020 launch video; comments wanted
[Re: Al_Alguire]
#2815571
08/31/20 03:39 PM
08/31/20 03:39 PM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I Live Here
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OP
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Well from the distance cant tell much other than it appears to be dead hooked and tripped the 60' beams with something other than the front tire it appears. Looks like the G meter, which I assume is the second graph is shows the same. Converter is WAY WAY tight. Looks like flash is 62-6300 shifting at 77-7800 falling back to 6200ish is simple KILLING it. G Forces will fall steadily throughout the run from beginning to end. The "choppiness" could be many things but doubt it is anything major. Could be the way the recorded is mounted could be how it is mounted to could be tracks a tad rough. By the looks of it its choppy the entire run..Wouldn't read a lot into that. Plenty to fix with the dead hook and converter for now Id say. FWIW here is a more typical data log of a G Meter, also shows driveshaft and engine rpm Al, shifts are 7500 on the 1/2 and 7300 on the 2/3. Flash 6300? So i have about a drop of 1200 low to second, 1000 2nd to 3rd. I will have to see if the G meter can vibrate , causing the rough graph.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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