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Old 07-13-2003, 01:12 AM   #1
Johngear67
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how to calculate final rpm?

if i have a 30" tire, and a 200r4, with 4.86 gears,,,, what would i be at (rpms) travling at 100 kph
plus, how did u figure that out?
so i could change gears to see what happens
thank u
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Old 07-13-2003, 01:18 AM   #2
Johngear67
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or 60 mph, i will do the rest.
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1967 Chevy C 10 Custom
350 780 cfm 467 lift 278 dur
ported&pollished
2400 stall 350TH
B&M shifter
175 shot of nitrious
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Old 07-13-2003, 02:21 AM   #3
70 CST 4X4
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For a regular auto tranny @ 60MPH 3353rpm

For an overdrive tranny @ 60MPH 2286rpm

Got the info off this website.
http://www.randysringandpinion.com/calculators.shtml

Might want to plug in your own numbers and check out different combos
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Old 07-13-2003, 02:50 AM   #4
Nova_Cobra64
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Hey John, where is Sask are you from?
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Old 07-13-2003, 11:54 AM   #5
Johngear67
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hi, i am in balgonie (20 klicks east of regina)
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1967 Chevy C 10 Custom
350 780 cfm 467 lift 278 dur
ported&pollished
2400 stall 350TH
B&M shifter
175 shot of nitrious
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Old 07-13-2003, 02:22 PM   #6
Bill72BB
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here is another
http://www.prestage.com/Car+Math/Gea...M/default.aspx
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72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts
tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion.


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