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07-21-2003, 10:34 AM | #1 |
Registered User
Join Date: Jul 2001
Location: North Delta, British Columbia
Posts: 1,344
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What should my RPM's be at?
When I'm on the highway cruising at about 60 - 65 mph, what should rpm be at? I have a 454, turbo 400 and 3:08 gears. My tach reads about 2500.
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1992 Gmc 2wd 1972 Chevy Blazer 2wd |
07-21-2003, 10:37 AM | #2 |
Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Will need to know tire size too...
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07-21-2003, 10:38 AM | #3 |
Registered User
Join Date: Jan 2003
Location: Seattle WA
Posts: 1,466
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I have 275/60's with a T400 and 502...mine is about 2500 at 60-65.
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FocuzTech Performance Evergreen Protective Coatings Gatorhyde...the best kept secret in spray in bed lining & protection |
07-21-2003, 10:50 AM | #4 |
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Join Date: Jul 2001
Location: North Delta, British Columbia
Posts: 1,344
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275/60 and 245/60
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1992 Gmc 2wd 1972 Chevy Blazer 2wd |
07-21-2003, 10:51 AM | #5 |
Registered User
Join Date: Jan 2003
Location: Seattle WA
Posts: 1,466
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I believe thats right....I have 3.08's too.
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FocuzTech Performance Evergreen Protective Coatings Gatorhyde...the best kept secret in spray in bed lining & protection |
07-21-2003, 10:57 AM | #6 |
No longer truckless
Join Date: Mar 2002
Location: Campbell, CA
Posts: 299
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There is a calculator tool here:
http://www.ring-pinion.com/calculators.shtml |
07-21-2003, 11:18 AM | #7 |
Account Suspended
Join Date: Jan 2000
Location: Woodstock, IL
Posts: 7,020
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My 69 with 235/75R15's and 3.73 gears runs 60 MPH about 2800 RPM's.
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07-21-2003, 07:10 PM | #8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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350/TH350 non lock up (not that the engine size matters) with 275/60 15s in the back spun by the stock 3.07 gears. (3.08 is car gears, trucks had 3.07...not that .o1 is gonna chainge anything)
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