What rpms at speed?
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Joined: May 2004
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From: Louisiana
What rpms at speed?
Greetings All,
I just bought a 2004 (Heritage) F150 with a 4.2L, 5-speed, 3.55 rear end and the stock 255/70R16 tires. My truck doesn't have a tach so I don't know what rpms I'm at for a given speed.
Could someone with a similar truck tell my *about* what rpms I'm at in 4th and 5th for a given speed? I can then do a little math to figure my rpms at the speed I'm curious about. I realize there will be some speed-o error; my truck, for example, is doing an actual 69-mph at 70 indicated.
TIA,
Sean
I just bought a 2004 (Heritage) F150 with a 4.2L, 5-speed, 3.55 rear end and the stock 255/70R16 tires. My truck doesn't have a tach so I don't know what rpms I'm at for a given speed.
Could someone with a similar truck tell my *about* what rpms I'm at in 4th and 5th for a given speed? I can then do a little math to figure my rpms at the speed I'm curious about. I realize there will be some speed-o error; my truck, for example, is doing an actual 69-mph at 70 indicated.
TIA,
Sean
Technical Article Contributor
Joined: Dec 1997
Posts: 9,417
Likes: 11
From: Windsor,Ontario,Canada
mph 1st 2nd 3rd 4th 5th
10 1548 893 592 397 318
12 1858 1072 710 476 381
14 2168 1251 828 556 445
16 2477 1429 947 635 508
18 2787 1608 1065 715 572
20 3097 1787 1183 794 635
22 3407 1965 1301 873 699
24 3716 2144 1420 953 762
26 4026 2323 1538 1032 826
28 4336 2501 1656 1112 889
30 4645 2680 1775 1191 953
32 4955 2859 1893 1270 1016
34 5265 3037 2011 1350 1080
36 5574 3216 2130 1429 1143
38 5884 3395 2248 1509 1207
40 6194 3573 2366 1588 1270
42 6503 3752 2485 1668 1334
44 6813 3931 2603 1747 1398
46 7123 4109 2721 1826 1461
48 7432 4288 2840 1906 1525
50 7742 4467 2958 1985 1588
52 8052 4645 3076 2065 1652
54 8361 4824 3195 2144 1715
56 8671 5003 3313 2223 1779
58 8981 5181 3431 2303 1842
60 9291 5360 3549 2382 1906
62 9600 5539 3668 2462 1969
64 9910 5717 3786 2541 2033
66 10220 5896 3904 2620 2096
68 10529 6075 4023 2700 2160
70 10839 6253 4141 2779 2223
72 11149 6432 4259 2859 2287
74 11458 6611 4378 2938 2350
76 11768 6789 4496 3017 2414
78 12078 6968 4614 3097 2477
80 12387 7147 4733 3176 2541
82 12697 7325 4851 3256 2605
84 13007 7504 4969 3335 2668
86 13316 7683 5088 3414 2732
88 13626 7861 5206 3494 2795
90 13936 8040 5324 3573 2859
92 14245 8219 5442 3653 2922
94 14555 8397 5561 3732 2986
96 14865 8576 5679 3811 3049
98 15175 8755 5797 3891 3113
100 15484 8933 5916 3970 3176
102 15794 9112 6034 4050 3240
104 16104 9291 6152 4129 3303
106 16413 9469 6271 4209 3367
108 16723 9648 6389 4288 3430
110 17033 9827 6507 4367 3494
112 17342 10005 6626 4447 3557
114 17652 10184 6744 4526 3621
116 17962 10362 6862 4606 3684
118 18271 10541 6981 4685 3748
120 18581 10720 7099 4764 3811
10 1548 893 592 397 318
12 1858 1072 710 476 381
14 2168 1251 828 556 445
16 2477 1429 947 635 508
18 2787 1608 1065 715 572
20 3097 1787 1183 794 635
22 3407 1965 1301 873 699
24 3716 2144 1420 953 762
26 4026 2323 1538 1032 826
28 4336 2501 1656 1112 889
30 4645 2680 1775 1191 953
32 4955 2859 1893 1270 1016
34 5265 3037 2011 1350 1080
36 5574 3216 2130 1429 1143
38 5884 3395 2248 1509 1207
40 6194 3573 2366 1588 1270
42 6503 3752 2485 1668 1334
44 6813 3931 2603 1747 1398
46 7123 4109 2721 1826 1461
48 7432 4288 2840 1906 1525
50 7742 4467 2958 1985 1588
52 8052 4645 3076 2065 1652
54 8361 4824 3195 2144 1715
56 8671 5003 3313 2223 1779
58 8981 5181 3431 2303 1842
60 9291 5360 3549 2382 1906
62 9600 5539 3668 2462 1969
64 9910 5717 3786 2541 2033
66 10220 5896 3904 2620 2096
68 10529 6075 4023 2700 2160
70 10839 6253 4141 2779 2223
72 11149 6432 4259 2859 2287
74 11458 6611 4378 2938 2350
76 11768 6789 4496 3017 2414
78 12078 6968 4614 3097 2477
80 12387 7147 4733 3176 2541
82 12697 7325 4851 3256 2605
84 13007 7504 4969 3335 2668
86 13316 7683 5088 3414 2732
88 13626 7861 5206 3494 2795
90 13936 8040 5324 3573 2859
92 14245 8219 5442 3653 2922
94 14555 8397 5561 3732 2986
96 14865 8576 5679 3811 3049
98 15175 8755 5797 3891 3113
100 15484 8933 5916 3970 3176
102 15794 9112 6034 4050 3240
104 16104 9291 6152 4129 3303
106 16413 9469 6271 4209 3367
108 16723 9648 6389 4288 3430
110 17033 9827 6507 4367 3494
112 17342 10005 6626 4447 3557
114 17652 10184 6744 4526 3621
116 17962 10362 6862 4606 3684
118 18271 10541 6981 4685 3748
120 18581 10720 7099 4764 3811
Technical Article Contributor
Joined: Dec 1997
Posts: 9,417
Likes: 11
From: Windsor,Ontario,Canada
I did npt want to screw up the columns so I posted this seperatly. 1st column is your speed the second column is your rpm in 1st gear the third column is your rpm in 2nd and so on.
Regards
Jean Marc Chartier
Regards
Jean Marc Chartier
