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Anyone wanna calculate my shift points

  • Thread starter Thread starter Slow5.0
  • Start date Start date Sep 21, 2005

Slow5.0

Active Member
Feb 13, 2003
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Portland, OR
Sep 21, 2005
#1
  • Sep 21, 2005
  • #1
I still tryin fugure out does i have right shift points

I wanna see results you guys came with

I have 3.73's and 315/35/17 tires and weight is 4050lbs (don't ask me why is so heavy)
And i have 5 speed

Here is dyno sheet

 

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fawcett

Member
Sep 10, 2003
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0
16
Cohasset, Ma
Sep 22, 2005
#2
  • Sep 22, 2005
  • #2
things begin to trail off after 5500, it doesnt seem like you'd benefit much from shifting too much later than that. i believe the key is to upshift into your powerband. when you do a 1-2, 2-3, 3-4 shift how much do your rpm's drop off? figure that out and you will be able to see where you should shift at.
not a pro on this subject but it seems fairly logical
just my .02
-fawcett
 

tmoss

Gettin Wired
Founding Member
Jun 28, 2001
7,153
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128
Saint Louis, MO
Sep 22, 2005
#3
  • Sep 22, 2005
  • #3
Ernan, go to my website in the "download" section and download the Excel spreadsheet I have there - one of the pages "shift points" is set up to let you see all this info.
 

Slow5.0

Active Member
Feb 13, 2003
2,554
0
46
Portland, OR
Sep 23, 2005
#4
  • Sep 23, 2005
  • #4
tmoss said:
Ernan, go to my website in the "download" section and download the Excel spreadsheet I have there - one of the pages "shift points" is set up to let you see all this info.
Click to expand...

Hey tmoss, whatever torque i put in those green field, shift points are same, i mean Shift rpms,resultant rpm,resultant TQ stay same ???
 

tmoss

Gettin Wired
Founding Member
Jun 28, 2001
7,153
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128
Saint Louis, MO
Sep 25, 2005
#5
  • Sep 25, 2005
  • #5
Yep, the green field information must be put in by you. The sheet shows the rpm drop from the shift and you must put the torque for that rpm in the green column, then look at and judge where your best shift point will be. You then have to experiment at the track by moving a little higher or lower and seeing what results you get. No program will be able to give every person the best SINGLE point to shift at.
 

tmoss

Gettin Wired
Founding Member
Jun 28, 2001
7,153
32
128
Saint Louis, MO
Sep 26, 2005
#6
  • Sep 26, 2005
  • #6
Ernan - go back to the site and use the sheet again, I added a graph and an explanation of how to use the sheet better. Should make things easier for you.

I ran your numbers quickly, and your 1-2 and 2-3 shifts would be ~ 6,000-6,200 rpm and the 3-4 taken to ~5,600 rpm.
 
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