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post #1 of 8 (permalink) Old 09-22-2003, 12:07 PM Thread Starter
Johnny Bling Bling
 
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rpm ques.

can someone please post what rpm you are at with stock 215-70-15 tires and 3.27 gears? i need the readings at 65, 70, 75, and 80 mph. i installed the purple tooth gear w/my 3.73's, and then removed when i went back to 3.27's. i didn't keep the original gear, so i bought a new one, but the rpm's seem to be higher than before at these speeds. i used to be at 2100(+-) rpm at 80 mph, but now i am at nearly the same rpm at just over 70 mph.

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post #2 of 8 (permalink) Old 09-22-2003, 06:58 PM
 
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today while coming home i actually made it a point (don't know why) to check out what rpm i was at at what speed and at 80 mph i'm almost at 2500. at 70mph i'm around 2100. This is w/ stock p215/70/15 and 3.27's and 4.6L V8
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post #3 of 8 (permalink) Old 09-22-2003, 08:13 PM
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post #4 of 8 (permalink) Old 09-23-2003, 07:09 AM Thread Starter
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94birdnj: thanks for the info. hopefully i can get a few others to corroborate those readings. don't know if it is different for v6.

palmguy: couldn't figure that one out. put in gear ratio and tire size, and got infinity for results. thanks for trying.

2003 Ford Expedition: 5.4L, harley supercharger, 2.93 upper pulley, 4lb lower pulley, c&l plenum, jlp cai, LFP SBTB, FTSP, Magnaflow 3" catback, Eclipse AVN-5510, white face gauges, cobalt c2 boost gauge, ddm hid's, 379 rwhp, 465 rwtq sold 11/3/12

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post #5 of 8 (permalink) Old 09-23-2003, 11:21 AM
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To use that calculator you need the transmission ratios as well. I believe those ratios can be found in the transmission 101 tech article! I am not sure if the AOD ratios are there but I think they are.

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1996 Thunderbird 5.0L 2V-4R70W
12.64 @ 107 MPH -> DA 3315 Ft above Sea level
12.49 @ 109 -> DA 2967 Ft above Sea level
2005 Mustang GT 4.6L 3V-TR3650 - SOLD
13.39 @ 102 MPH -> DA 3617 Ft above Sea level
2011 Mustang GT 5.0L 4V-6R80 - Bolt-ons
12.32 @ 115 MPH -> DA 2980 Ft above Sea level
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post #6 of 8 (permalink) Old 09-23-2003, 12:02 PM Thread Starter
Johnny Bling Bling
 
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no AOD ratios. thanks for trying though.

2003 Ford Expedition: 5.4L, harley supercharger, 2.93 upper pulley, 4lb lower pulley, c&l plenum, jlp cai, LFP SBTB, FTSP, Magnaflow 3" catback, Eclipse AVN-5510, white face gauges, cobalt c2 boost gauge, ddm hid's, 379 rwhp, 465 rwtq sold 11/3/12

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post #7 of 8 (permalink) Old 09-23-2003, 12:11 PM
TGJ
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Try these in that calculator

(1st) 2.40, (2nd) 1.40, (3rd) 1.00, (OD) .67

R.I.P. Johnny Langton (1975 - 2011)

1996 Thunderbird 5.0L 2V-4R70W
12.64 @ 107 MPH -> DA 3315 Ft above Sea level
12.49 @ 109 -> DA 2967 Ft above Sea level
2005 Mustang GT 4.6L 3V-TR3650 - SOLD
13.39 @ 102 MPH -> DA 3617 Ft above Sea level
2011 Mustang GT 5.0L 4V-6R80 - Bolt-ons
12.32 @ 115 MPH -> DA 2980 Ft above Sea level
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post #8 of 8 (permalink) Old 09-23-2003, 01:42 PM Thread Starter
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well, if that calc. is correct, my rpm's are good to go. must have had bad speed sensor or gear in before.

2003 Ford Expedition: 5.4L, harley supercharger, 2.93 upper pulley, 4lb lower pulley, c&l plenum, jlp cai, LFP SBTB, FTSP, Magnaflow 3" catback, Eclipse AVN-5510, white face gauges, cobalt c2 boost gauge, ddm hid's, 379 rwhp, 465 rwtq sold 11/3/12

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