Does anyone know if the Bonneville Hawks used the ' standard' 3.73 Differential that 'came with' an R 2 engine to go 140 MPH, or did they drop a ratio or two, to get that higher top speed of 140 MPH ...? Thanks in advance...
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Bonneville Hawks 1963 rear axle gear ratios
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While not an exact answer.... Somehwere in between here: Gear ratios range from 2.72:1 to 5.89:1HTIH (Hope The Info Helps)
Jeff
Get your facts first, and then you can distort them as much as you please. Mark Twain
Note: SDC# 070190 (and earlier...)
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You can go here and do the calculating for yourself:
http://www.csgnetwork.com/rearendgearcalc.html
With a 1-1 ratio in top gear and 27 inch tall tires, you'd need a 2.73 rear end @ 5000 RPM to exceed 140.
You'd need to go 6500 with a 3.73 rear end to hit 140 with 27 inch tires.
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Originally posted by Bud View PostI have a 3.73 gear in my Avanti and I don't think the the engine could push the car to 140MPH before the engine runs out of RPM. I would think that a 3.07 gear was used to get that speed. BudRight, Bud; IIRC, that's what they had.
BP
We've got to quit saying, "How stupid can you be?" Too many people are taking it as a challenge.
Ayn Rand: "You can avoid reality, but you cannot avoid the consequences of avoiding reality."
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We set the record using a 3.0 gear. The initial run in 93 used a 2.75 ratio and the engine would not pull it. Power met resistance at about 188 MPH. At 200 the engine was turning about 7100 RPM. The car has a Ford 9" from a Lincoln Versailles.james r pepper
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