. Our calculator also shows theoretical mile-per-hour. Your actual mph will be based on the power of the engine and the . But it's not that simple. Fast way to determine Gear Ratio and Speed. with a strong wind against your back. Engine Number of teeth on clutch sprocket Jackshaft In Number of teeth on input . will cause them to overheat and possibly burn out along with not Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4.88 = (2881 X 37)/ (65 X 336) To determine the final drive ratio, divide the rear sprocket size, say 49 teeth, by the front or countershaft sprocket size, say 13 teeth (like a new Yamaha YZ250F ). Then divide the total ratio required by the actual gear drive ratio for the model selected to find the sheave ratio required. paulkish old fart. There are two types of electric motors; standard motors and gear motors. Applicable Calculator Formulae PI = 3.14159 PI * D = C . Input Gear Teeth Number: Ouput Gear Teeth Number: Input Rotational Speed: To Calculate: Simple Advance. Secondly, due to the jackshaft acting as a pulley, it reduces the physical stress on the sprockets and chain. allowing them to produce the full amount of power that they have the potential to. History Jackshaft. allowing them to produce the full amount of power that they have the potential to. teeth. 9. Standard motors should not be used for electric bicycle projects unless a Just place an order over $99, and we'll drop the shipping and handling charge. The plate in the 30 series makes it hassle-free to install and is therefore very popular. 9 tooth 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 10 tooth 53 . Home; Parts Catalog. The purpose of this calculator is to determine the potential speed of a mini bike based on certain data. Gear ratio is determined solely by the number of teeth on each gear. Left Column: Number of Teeth on Axle Sprocket. In this case, the Final Drive Ratio is 3.77 - the front sprocket revolves 3.77 times to make one complete revolution of the rear sprocket. 5:1. The formula is also in Aaen clutch tuning manual. Ratio 1st Gear. Copyright 2002-2020 by ElectricScooterParts.com, an Electricruz Inc. company. Or, change input variables (engine RPM, axle gear ratio and tire height) to determine vehicle speed in each forward gear. This calculator determines potential speed, gear ratio and the size of the , Pukka Gx400c Electric Mini Bike Replacement Battery. Racing, Inc. Youll need to know the high-end gear reduction of your torque converter. = tire outside diameter in inches MPH = miles per hour.0029751 is the correction factor to get from RPMs to MPH. Get any 3 for $25 plus shipping. It is used as an intermediary in the power transmission from the engine to the wheel. Motor Types. See Wikipedias guide to writing better articles for suggestions. May be silver or black depending on stock. 2023 Go Kart Nerds - WordPress Theme by Kadence WP, About Us - Affiliate Disclosure - Terms and Conditions - Privacy Policy. 4 Stroke Bicycle Engine Kits. These resistance factors could make the top speed slower than the calculation. If you've benefited from this free service please consider helping us support: Pulley Calculator - Centers - RPM - Belt Length and Speed, Enter any 3 Known Values to Calculate the 4th, All Inch inputs and dimensions are actual physical finished sizes, If the US ever goes Metric, you'll be able to use a Meter to measure Meters - A Meter Meter, Copy all diagrams on this page to bottom of page - Make multiple copies to Print or Compare Results. Your email address will not be published. The, Large Selection of Go Kart Parts and Mini Bike Parts. When you scroll down the page, you will eventually see a chart with all the constants. Tuning your kart or racing lawnmower gearing ratio is very important for on-track performance. There are two main purposes for using a jackshaft on a Go-kart or a minibike, the first reason is to align the clutch with the Axle sprocket without redesigning your entire setup. This is because a jackshaft is necessary for a belt drive system. Get up to speed with special offers and event info! Chain Speed @ 1000 RPM Small Sprocket = 216.3 m / min. Gear Ratio Calculator. Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. Gear Ratio Calculator. About Us. The obvious one is the loss of power in transmission, more energy will get wasted into heat due to the jackshaft which will ultimately affect the torque and RPM of the rear wheel. Using our gearing calculator you can quickly determine your gearing ratios and maximum mile-per-hour. 176 N Olive St. Ventura, CA 93001. contact@evolventdesign.com. Web The gear . Enter the diameter of the drive (power) wheel and tire combination. Early 4 speed: 3.044; Big twin 96 up: 3.21; big twin 80-95: 3.24; Sportster: 4.30; Six-Speed 2.94 or 3.21 depending on make; V-Rod 2.51; JIMS FAT5 2.91. . ADVERTISEMENT. made for electric bicycles with 16" through 26" wheels. This calculator determines the top speed of the vehicle with no margin for mechanical, rolling, or wind resistance. When riding on flat ground the top speed is usually only reduced by a small amount. Required fields are marked *. A ratio of 2 to 1 would be signified by 2:1. Dealer Discounts | Tire Diameter on Large Sprocket mm inch. Vehicle speed in MPH. 10. Engine Number of teeth on clutch sprocket Jackshaft In Number of teeth on input , Mini Bike Jack Shaft Systems, Performance Engines, Adjustable Motor Mounts Mini Bike Performance Exhaust Headers, Honda GX200 and Clone Engine Performance , Contact BMI Karts. Standard Motors (Electric Scooter Motors). This calculator determines potential speed, gear ratio and the size of the . Learn More, Have questions? ), For XP chassis you take the 1:1 mph and divide by .89. The only way the belt will or should go to the top of the primary "rim" is when you are. Note that neither of these are equal to the gear ratio for the entire train, 4.3. Monday through Friday. Go Kart Gear Ratio Calculator for Jackshaft Setup. Determine your engine's RPM based on the transmission gear ratio, tire height, MPH, and the ratio of your ring gear and pinion gear. . These resistance factors could make the top speed slower than the calculation. 4 Stroke Parts. Ratio 3rd Gear. In a Go-Kart or a Mini Bike, a jackshaft is a shaft between the Axle and the Engines Crankshaft. For the Tire field, enter your tire diameter in inches. Remember that this is where the belt climbs to about 7/8 of an, inch from the rim of the primary. PI * D = C (3.14159 * wheel/tire diameter = circumference of wheel and tire combo) at / ct = GR (gear ratio = axle teeth / clutch or engine teeth) RPM / GR = WRPM (engine RPM / gear ration = Wheel RPM) We will get resultant GR between Driver and Driven Gear. Jackshaft gearing. Change Sprockets - Change Speed. We spent the time making these universal calculators to solve common gear problems we have encountered frequently; Design, Process, & Measurement of Internal and External Spur Gears. So then (82.5mph / .88) = 92.69mph, For MXZ/REV chassis you take the 1:1 mph and divide by .83. Go Kart Gear Ratio Tool. Jackshaft Out Number of teeth on output sprocket. This calculator will show. Enter the values below to calculate your gear ratio. Learn More. Copyright 2023 by AUTOSALES, INCORPORATED paulkish old fart. Our aluminum cases are manufactured from premium material sourced in the USA, designed and machined in-house, and offered in various forms to meet the requirements of the most demanding applications. @ 82.5 mph the belt will go up the primary clutch as high as approximately 7/8 from the rim. . margin for mechanical, rolling, or wind resistance. . or o.d. Go Kart Gear Ratio Speed Calculator (MPH). Web Evolvent Design LLC. You can check this Gear Ratio Chart to choose the gearing that fits your kart and its purpose. Here is example of skidoo 2.86 pitch track with 7 tooth. Discount is automatically applied. 20 and 40 series on the other hand will require a separate jackshaft setup that can hold sprockets and the driven pulley. Your headquarters for the hottest new products! Gear motors have gear reduction transmissions built into them with shaft output speeds Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. enter Pulley 1 = 6, Pulley 1 RPM = 1000, Pulley 2 RPM = 500, and hit, Click slider to select, then use Keyboard Cursor Keys. Greenbush, MN 56726, Copyright 2005-2023 Wahl Bros. Select the nominal gear drive ratio that is closest to the total ratio required. To Decrease RPM, choose Initial Bottom pulley and work up. Stay Updated with Emails from Summit Racing. Our calculator also shows theoretical mile-per-hour. All Right Reserved, Rivets, Washers, Rivet Nuts & Dzus Fasteners, Replacement Components, Cleated Track Suspensions, Replacement Components, RT & LT Suspensions, RPM GR x SC 12 x 60 5280 = MPH @ 1:1 Clutch RatioGR = Gear Ratio (divide top sprocket into bottom sprocket), CD = Center Distance (Drive Shaft to Jackshaft Centers), Center Distance (Drive Shaft to Jackshaft). These C Type Jackshaft Sprockets have a 3/16" Hub on each side of the teeth. Jackshafts are a great way to lower the gearing. Enter the values below to calculate your gear ratio. This calculator determines the top speed of the vehicle with no Speed Gear Ratio Calculator. Final Ratio. Engine Number of teeth on clutch sprocket Jackshaft In Number of teeth on input Mini Bike Jack Shaft Systems, Performance Engines, Adjustable Motor Mounts Mini Bike Performance Exhaust Headers, Honda GX200 and Clone Engine Performance Contact BMI Karts. This guide is for modifying, designing and building custom electric; scooters, bikes, go karts, ATVs, wagons and other similar light electric vehicles. Jackshaft Assembly for the Coleman CT200. All Rights Reserved. Decimal Fraction. For the Tire Height field, enter . Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Save yourself the headache and let us figure out your ring-and-pinion gear ratio!Select the value you want to solve for.For the Tire field, enter your tire diameter in inches. Clutch Sprocket: teeth: Big Drive Sprocket: teeth: The Gear Ratio = to 1 : Rear Tire Height: in/mm: Revolutions Per Minute: RPM: Approximate Speed: mph/kph: . Following our gear ratio equation, we can say that this gear train has a gear ratio of 10:40, 10/40, or simply 1/4 (or 0.25). When riding on flat ground the top speed is usually only reduced by a small amount. Create and Print Full Scale PDFs with diagrams on this page (templates), If you know any 3 values (Pulley sizes or RPM) and need to calculate the 4th, enter the 3 known values and hit, For example, if Pulley 1 is 6" diameter, and spins at 1000 RPM, All Sprockets are 5/8" Bore. 1 if no input jackshaft. Learn More, You can return any new or unused item within 90 days of the date your item was shipped and we will refund the full purchase price. Standard motors are This calculator will provide the speed of the vehicle based on transmission gear ratio, engine RPM, tire height, and the ring gear and pinion gear ratio in the rear end . Speed @ 27 inch tire diameter on large sprocket = 47.1 MPH. Each time the shaft spins one revolution, the gear moves one tooth forward. Electric Scooter Repair Help | Axle = Rear axle sprocket. S.R. Please note none of these This articles tone or style may not reflect the encyclopedic tone used on Wikipedia. eccarburetors.com. The Drive Ratio and Speed sections may also be used for gears , though obviously the other sections will be meaningless since gears must be on defined centres to mesh properly. The gear calculator gives you the mph for 1:1 clutch ratio. Check Lock Centers and adjust sprockets - Chain links will adjust to maintain nearest to current Sprocket Centers. Engine = Clutch Sprocket. However, many Go-karts come with a fixed axle sprocket and there is no way to fit a chain correctly. UPS Ground Only. Dealer Discounts | To get the belt to go up to, the rim of the primary then the sled will have to go about 93mph (full shift overdrive), Calculate Full shift overdrive (O.D. Tuning your kart gearing ratio is very important for on-track performance. 8300 N. Austin Ave Morton Grove, IL 60053 Never miss a sale on new parts, tools, and more! Here's a Calculator to calculate the gear ratio and top speed of a setup. commonly between 1800-3000 RPM. Burris Racing Jackshaft Calculator. The amount that the top speed will be reduced by resistance depends on many factors such as the power . A mechanical odometer is another place that uses a lot of worm gears. From the above, calculated gear ratio we can calculate the speed and torque at output gear. Gears / Diffs / Install Kits Listed By Vehicle, Standard Gears & Pro Gears Dana / Ford / GM / Mopar, Strange T-Shirts. To find the total ratio, use the pulley ratio formula: Ratio = (Radius of Driven Pulley) / (Radius of Drive Pulley) Example: A handcrank is attached to a drive pulley of 2 inches in radius. Order Line: (218)782-2295 This will calculate the final gear ratio and mph. A ratio of 1/4 to one would be signified by .25:1. (The Gear Ratio of Torque converter in the Above chart is = Teeth in Axle Sprocket / Teeth in Jackshaft Sprocket) Please note: If you increase the weight of the kart or driver above the weight recommended by your Clutch/Torque converter manufacturer, you'll need to lower your . Heres a video from the Gas Pedal Garage Youtube channel with their set-up. Engine Rpm at takeoff = 1000RPM 1000 / 4.1 = 243.91 RPM 243.91 / 47.953 = 5.086 : 1 ratio-----Now things are a little more complex here because we have 1 speed for the Jackshaft and 2 gears on it. Gear Ratio Calculator for Vehicle without Jackshaft. Copyright 1979 - 2022 Greg Tarrant - blocklayer.com, Square to Round Transition - Full Scale Printable Templates, chain revolutions the same tooth on the SMALL sprocket contacts the same chain link =, chain revolutions the same tooth on the LARGE sprocket contacts the same chain link =. Imperial. Applicable Calculator Formulae PI = 3.14159 PI * D = C . Check the box if the gear is on the same shaft as the gear above it, leave it unchecked if the gear meshes with the gear above it. with a strong wind against your back. potentially street legal mini bike. 1-(888)-926-6554; Barhorst Manufacturing, PI = 3.14159. There are two types of electric motors; standard motors and gear motors. Your actual mph will be based on the power of the engine and the resistance made by friction, air, and weight of the . The method you use to determine clutch engagement or your concept of what's needed . Gear Ratio Calculator. However, sometimes the best solution to this problem is to install a jackshaft. margin for mechanical, rolling, or wind resistance. If the gear has 40 teeth, you have a 40:1 gear ratio in a very small package, such as in a windshield wiper. Resultant Multi Gear Train GR = 0. To help you with that, I've created a go-kart gear ratio chart and speed calculator. All rights reserved. Use the gear ratio given in chart in the above calculator to calculate the top speed. Does not include mounting hardware. Use this calculator to determine your gear ratio and vehicle's speed in any gear and any engine RPM for best performance. Speed Calculator - English. Another 1872 author wrote "Gear wheels are used in England to transmit the power of the . Electric Scooter Repair commonly between 1800-3000 RPM. Help * Coupon does not apply to Oval Size Matters T-Shirt, Gear Sets / Differentials Installation Kits. Using our gearing calculator you can quickly determine your gearing ratios and maximum mile-per-hour. Jun 30, 2019 #6 kartboy63 said: The amount that the top The gear ratio on your mini bike or go kart is the ratio between the number of teeth on the clutch, and the number of teeth on the drive axle sprocket. The top speed could Summit Racing will BEAT any competitor's advertised price! There are other methods to change gearing like changing the Axle sprocket or clutch, however, jackshafts can come in handy for some situations. Featured products from your favorite shows! could make the top speed slower than the calculation. 4.5:1. If your set-up doesnt need them youll be better off not getting one. If you know your gear ratio then this doubles as a Vehicle Speed CalculatorJust type in your info, press calculate, and youll get the right gear ratio without the guesswork. Valid on orders shipped in the contiguous United States. RPM Small. Housing end bolt patterns can be confirmed on the bottom of the axle order form. There is no one perfect gearing for every kart, it really depends on your setup and the purpose of your go-kart/Mini Bike. Create and Print Full Scale PDFs with diagrams on this page (templates). ReAdjust Chain Links to maintain (nearest to) current Sprocket Centers as you change Sprocket Teeth. Enter the values below to calculate your gear ratio. Gear Ratio Calculator for Vehicle with Jackshaft. Standard motors have shafts directly attached to the motor windings with shaft output speeds Solve For. Jackshaft Calculator. made for electric bicycles with 16" through 26" wheels. Remember that this is where the belt climbs to about 7/8 of an. Contact Us, Summit Racing has more payment options. One of the most common gear ratios for go karts is 11-12 teeth on the clutch sprocket, and 60 teeth on the axle sprocket. Teeth on input jackshaft if jackshaft is used . Now you can either do some machining and welding work to move the axle sprocket or move the engine to align the engine directly with the axle. Engine Number of teeth on clutch sprocket Jackshaft In Number of teeth on input sprocket Jackshaft Out Number of teeth on output sprocket Axle Number of teeth on rear axle sprocket. Our calculator also shows theoretical mile-per-hour. and you need to find Pulley 2 size to spin it at 500 RPM, Copyright var date = new Date(); document.write(date.getFullYear()); eccarburetors.com. V-2 / V-3 with Jack Shaft Calculator. About; ie a 6 tooth sprocket driving a 12 tooth is 2:1. > Top Speed and Gear Ratio Calculator, Gear Ratio The gear ratio is 6 and the potential speed is just under 36 miles per hour. Copyright 2002-2020 by ElectricScooterParts.com, an Electricruz Inc. company. Axle Number of teeth on rear axle sprocket. All calculators on this site are geometric only. gear reduction transmission such as a jackshaft is used with them to Terms of Use | Privacy and Security | Site Accessibility [ (Axle Ratio x Vehicle Speed x Transmission Ratio x 336.13) / Tire Diameter ] = [ (3.73 x 65 x 1.00 x 336.13) / 31 ] = [ 2628 ] Note: 336.13 is used to convert the result to RPM = [63360 inches per mile / (60 . Find out more. Product Description. Motor Types. . Gear Ratio Calculator. These are the components that come with a Jackshaft kit:2 x sprockets2 x bearings2 x bearing hangers, a collar, a key1 x jackshaft itself. Motor to Wheel Gear Ratio and Motor Type Examples, Store Polices | 6:1. vehicle is in motion, otherwise they will run at too low of an RPM which Therefore (X = 1.67)*(Y = 0.01137) = 0.0189, The formula is in any BRP race manual (drive section) and you just have to use the last part of the formula to figure out. Standard Motors (Electric Scooter Motors). The sprockets in the jackshaft should align perfectly with the clutch sprocket and the axle sprocket. When using the calculator, always good to calculate the mph for both shift ratios. inch from the rim of the primary. All rights reserved. There are other methods to change gearing like changing the Axle sprocket or clutch, however, jackshafts can come in handy for some situations. Old Honda Trail 55's used a pizza-sized rear sprocket of up to 72 teeth to achieve overall ratios of over 50:1 that allowed these tiny bikes to pull about any hill you could . Gear Ration Speed Calculator (MPH) calculator for go karts, mini bikes and more. 176 N Olive St. N.T Number of Teeth in a sprocketSprocket 1 This is the sprocket that connects to the Axle sprocket with the jackshaftSprocket 2 This is the sprocket that connects to the Clutch sprocket with the jackshaft, Gear Ratio = (Axle N.T/ Sprocket 1 N.T) X (Sprocket 2 N.T/ Clutch N.T). Using our gearing calculator you can quickly determine your gearing ratios and maximum mile-per-hour. Visiting from Norway or Sweden? > Modification and Custom Project Help Engine Number of teeth on clutch sprocket. RB Racing's Drivetrain and Speed Calculator for motorcycles. could make the top speed slower than the calculation. The amount that the top speed will be reduced by resistance . Gear ratios are a complex and technical part of go-karting, especially when you have to tune your kart's ratios. V-20/ V-30 with Gear Drive Calculator To Calculate the speed of your impeller on a V-20/ V-30 supercharger . You have to take 2 things into consideration while installing a jackshaft. Jackshaft gives you the flexibility in choosing the gearing, you can have it set up really high or very low without needing large axle sprockets. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Wahl Bros. Karting Drive Ratio Chart Arranged by Sprocket Size. The final drive ratio on a motocross . Max RPM. 6.5:1. Gear Ratio Calculator Web The gear ratio is 5 and the potential speed is just under 13 miles per hour.. By Multiplying gear-ratio between 1 to 2 and 2 to 3. So, instead of looking at the technical side, let's see how a gear ratio affects your speed around a track. $5 Off Your $100 Mobile App Purchase - Get the App. The other purpose is to lower the gearing without having to install a huge axle sprocket. Gear Ratio Calculator. A Go-kart or minibike setup with a clutch and a jackshaft will have 2 sprockets in the jackshaft, one sprocket of the jackshaft is connected to the clutch sprocket with help of a chain, while the other sprocket is connected to the Axle. Electric Scooter Repair Torque converter top speed and gear ratios are a bit more complicated to calculate because the gear ratio is variable and depends on the Engines rpm. This guide is for modifying, designing and building custom electric; scooters, bikes, go karts, ATVs, wagons and other similar light electric vehicles. This gear ratio means that the output gear would only rotate 1/4 of a full rotation after the input gear has completed a full turn.Continuing in this fashion and keeping a consistent input speed, we see that the rate of the output gear is also 1/4 of that of the input . New Ratio Needed : 1. Your email address will not be published. All calculators on this site are geometric only. Our famous Summit Racing catalog and specialty catalogs too! Step-3: By Multiplying gear-ratio between 1 to 2 and 2 to 3. Carburetors & Air Filters. For example, if the motor speed is 1750 rpm and the gear drive output speed is 35 rpm, the total ratio required is 50. An example setup is shown below. It also gives you more flexibility to gear your sprockets, as you have a total of four instead of two. The top speed could = 17.64 SC. About Us. Evolvent Design, LLC. commonly between 400-550 RPM. Offer excludes truck freight and oversize fees. Gear motors are the motor, weight of the vehicle and rider, size and air pressure of the tires, Enter the values below to calculate your gear ratio. Web Go Kart Gear Ratio Speed Calculator MPH. Visa/Mastercard, Discover, American Express, Pay Pal, and Pay Pal Credit, Gift Cards, Summit Racing SpeedCard. The driven shaft will be 1/2 the driving. Scroll through the list of popular transmissions to find yours. Just type in your info (example: 5000 RPM), press calculate, and youll get the right ratio without the guesswork. made for electric scooters, go karts, and other similar vehicles with 6"-12" wheels. J/S In = 20, 24 or 28 tooth input sprocket. The jackshaft and the sprockets should not move sideways when youre driving. Standard motors should not be used for electric bicycle projects unless a Jackshaft In Number of teeth on input sprocket. Ratio 6th Gear. 5 0.5 = 0.25. Measure the circumference in inches for your rear tire. Default speed Help on: Calculate RPM per gear at 50 Mph or Km/h in 3 setups; Change Speed Help on: Calculate RPM per gear at particular speed in 3 setups; Chain / Belt Geom. Bicycle Engine Kits. Standard motors have shafts directly attached to the motor windings with shaft output speeds Nov 13, 2018 #12 Compu-kart wrote: "The clutch is set to engage at 3500 rpm (clutch speed)." The sentence you wrote is not correct. incline degree that the vehicle is going up, and headwind. In a worm gear, a threaded shaft engages the teeth on a gear. Thread starter JohnWR; Start date Apr 12, 2014; Tags gearing jackshaft; Parts from Hent on eBay. Tuning your kart or racing lawnmower gearing ratio is very important for on-track performance. Ratio 2nd Gear. Just type in your info (example: 5000 RPM), press calculate, and you'll get the right ratio without the guesswork. Gear Ratio & Top Speed Calculator for Jackshaft. Divide the number of teeth on each "driven" gear by the number of teeth on the "drive" gear for each interlocking set of gears to calculate the intermediate gear ratios. Learn More, We're confident our prices are the lowest. A buzzword in go-kart gear ratios is the 6:1 ratio. dba Summit Racing Equipment | Trademarks, Everything You Need for Anything You Drive. A very common mini bike ratio is 11-12 teeth on the . Use this form to calculate your top-speed. So then (82.5mph / .83) = 99.39 mph. Store Polices | However, this calculator can give a rough guide to minimum chain length in this situation - for Derailleurs, enter the largest sprocket on each end, ie. Learn More, Best Tech Advice and Customer Support, before and after your purchase! This system can be upgraded / replaced with a TAV kit, our part# 203583. The jackshaft kits come with ball bearings and collars that will fix the sprockets into their positions. Cost is another factor to consider, a jackshaft combined with sprockets and bearing will cost around $50. incline degree that the vehicle is going up, and headwind. Ratio 5th Gear. the motor, weight of the vehicle and rider, size and air pressure of the tires, Jackshafts are a great way to lower the gearing. Supercharger Systems; Supercharger Units; Air Components; Fuel Components; Information. These resistance factors Also calculated is the new gearing you would need in order to return back to your original gear ratio when going to a bigger or smaller tire. Input Speed (rpm) A jackshaft will help you to reduce gearing and align the sprockets. 30 series torque converters come with an aluminum plate and the jackshaft can be fit in the plate, therefore wont require any separate jackshaft setup.
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