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Porsche 911 Transmission Gear Ratio Graph and Ratios List

    https://www.cogscogs.com/Gear-Ratio-Charts-and-Graphs_ep_10.html
    Listed below is a chart of the various versions that Porsche produced Manual Transmissions Those transmission that came with what is known as the "Simplified" differential are listed with an "S" after the final drive ratio in the charts Below. Manual Type, Qty Gears,R&P Ratio,1st2nd3rd4th5th Gears,Serial #s,Note

Gear Ratios Calculator, MPH, Top Speed - DragTimes.com

    https://www.dragtimes.com/2011-Porsche-911-Turbo-gear-ratios-top-speed-58.html
    (mph) (gear ratio) (336) = (tire diameter in inches) (rpm) With the above numerical approximation, both formulas are identical if we consider that (rpm)/ (gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire.

How to Choose the Right Gear Ratio for Your Muscle Car …

    https://www.motortrend.com/how-to/how-to-choose-the-right-gear-ratio-for-your-muscle-car-or-drag-racer/
    The overall First gear ratio with the TH400 and 4.10:1 rear gear would be 2.48 x 4.10 = 10.168:1. But, 10.168 4.70 (to determine the …

Wallace Racing - Calculate Rear End Gear Ratio needed

    http://wallaceracing.com/calcrgr.php
    Todays date is 5/8/2022 Calculate your Rear End Gear Ratio Needed Back to Calculators Index Gearing for the strip To find the ideal gear ratio for drag racing use your RPM at peak HP. Example: If your max HP is at 6300 RPM use 6300 for the RPM. Gearing for cruising To find the ideal gear ratio for cruising use your RPM at peak Torque.

Porsche Gear Ratio & Speed Calculator: Live & Collaborative

    https://retro-sport.com/calculator/porsche
    Read our User & Collaboration Guide, call us at 510-907-9700 or email us. Ready to buy gears? Shop Now. Use this form to email a customized PDF gear chart to yourself, your team, or to us at [email protected].

911 3.2/915 gear ratios - Pelican Parts Forums

    http://forums.pelicanparts.com/porsche-autocross-track-racing/850909-911-3-2-915-gear-ratios.html
    A 4.43 ring and pinion final ratio (or stock 3.88 with closer/shorted gear ratios for a similar effect) with stock gears would give me the ideal balance of road and track compromise and get me around this goal. A few things to ponder:

PORSCHE 901, 911, 914 TRANSAXLE SPECIFICATIONS

    https://californiamotorsports.net/pages/porsche-901-transaxle-specification
    PORSCHE 901, 911, 914 TRANSAXLE SPECIFICATIONS. Transmission type (s): 901/XX, 902/XX. Original equipment for: Porsche 911 and 912 short wheel base cars 65-early 69. Description: 4 or 5 speed H pattern manual transaxle with early Porsche synchromesh and dog leg 1 st gear. Limited Slip Differential: A ZF 40-80% LSD was optional equipment.

Selecting the Best Gear Ratio - Mark Williams Enterprises, …

    https://www.markwilliams.com/selecting-gear-ratio.html
    The aftermarket has responded to this by offering a plethora of ratios ranging from 2.91 to 6.50:1. At last glance there are nearly 40 ratios available in standard 9" size, with many of the more popular ratios offered with a 9-1/2" ring gear, which can be accommodated in a 9" housing. What is the optimum gear ratio for your application?

Guide To Choosing The Best Gear Ratios For Racing Cars

    https://www.yourdatadriven.com/guide-to-choosing-the-best-gear-ratios-for-racing-cars/
    A good approximation for this is typically estimated at about 2%-3% of your racing cars weight. Assuming you don’t know the mechanical losses precisely. Aerodynamic drag increases with the square vehicle speed. This is why the line curves up so much. Aerodynamic drag becomes the primary resistance force, especially at higher speeds.

How to Select Gear Ratio Combos for Better Performance

    https://www.racingjunk.com/news/how-to-select-gear-ratio-combos-for-better-performance-2/
    Bigger was better. Out back, you had to pack (at least) a set of 4:11’s to be somebody. The reality was, you didn’t have much choice either; for example, if you were a GM guy all you could get inside a close ratio Muncie was a 2.20:1 first gear set. GM Powerglides offered a bit of choice as they came in either a 1.76:1 or a 1.82:1 low gear ...

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