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Post Info TOPIC: RPM / Speed Calculator
SD 396


Poncho Master!

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RPM / Speed Calculator
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I found quite a few of these on the internet when I was trying to figure out the speed my car was doing by RPM.
 Here are a couple:

By tire size and all gears

By tire height

-- Edited by SD 396 at 17:46, 2008-10-08

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73SC


A Poncho Legend!

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Ya, my LeMans does 272 MPH ! I was never any good at forms.

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
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65Camino


Uber Guru

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I know you are a speed demon but I don't think you ever gone that fast? I did but that was jumping out of a plane.

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73SC


A Poncho Legend!

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I tried again, it won't work if you put in zeros for the gears.

Anyway the small block 350 has a red line of 5500 but I doubt it would ever hit that in top gear so I put in 4500. It says 123 MPH which I think is reaonable for a mostly stock 350 with 2.73 rear end and factory spec tires. I tried 4800 and it showed 131 MPH, I don't think so. The fastest I ever saw on the speedo was a tick over 115 MPH and I lifted off so 120 or so would be it. If I had an optional 3.42 rear end top speed would be about 106 MPH. cry

My 300 HP Cadillac Deville Northstar comes up with 148 MPH and I believe it. Again the most I've ever seem is 112 MPH but the on ramp to the 404 was ending and I had to brake to merge with traffic. wink

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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
beaumontwagon


Guru

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Pretty cool to play around with.You can also figure out how fast your travelling just before you shift by inputing you trans gear ratios for a certain rpm.Keep in mind that if you have an auto trans , your rpm will be around 5% higher at any given speed due to converter slip.



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427carl


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 My car goes 101 mph in 2nd gear, with 2.73 ....How fast will it go in drive? 350 turbo @ 6500

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73SC


A Poncho Legend!

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427carl wrote:

 My car goes 101 mph in 2nd gear, with 2.73 ....How fast will it go in drive? 350 turbo @ 6500


I know it is strong but will it turn 6500 in top gear?



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
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427carl


A Poncho Legend!

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good question!idea   I am usually too scared to look down!!!   ha ha    how about 5500?        My 66 Corvette Coupe 427-425 would "show" 152 mph at 5500 x 3.55 gears  P225/75R-15 Yokohamas on 15x8 's  It would go 85 in second and 115 in third...that was in '74

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