By multiplying these three ratios you come up with a 2.46 first gear ratio. 1.31% ratio uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear. Gear Ratios Calculator, MPH, Top Speed This calculator outputs the how fast a car can go in each gear as calculated by the gear ratios, engine redline and tire size. For our purposes, we’ll use a 26.5-inch-tall tire with a 4.11 rear gear ratio, and a goal of 2,600 cruising rpm. There’s a Level 6 aston martin 1st gear tune in the comments of my Drag Racing Upgrade tips … Just reduce the gear ratios for the 3rd, 4th, 5th and 6th gears. Shift with either our patented. Nissan touts "close ratio" for their 6 speed. Perhaps the best budget-conscious transmission for any motor swap is the CD009 transmission found in the ’05-’06 350z and g35. This 3 speed automatic transmission was designed to handle up to 475 lb-ft of torque, although the C6 with the aftermarket upgrades used for drag racing can handle significantly more torque. Jerico Drag Racing 4 Speed Revision 4 Transmission * Dog Rings and Sliders for Quick and Easy Shifting * Wide Variety of Gear Ratios Available * Stock and Super Stock Racing Applications * Aluminum Top Loader Case Aircraft Quality A206 * Caged Needle Thrust Bearings between Gears * Larger Mainshaft Size Reverse Lockout. This 6 speed is the best 6 speed design out there. 6th gear of H pattern transmission has sequential system which creates the 5-speed sequential transmission with direct gear ratio of 5th gear. 6L80E 6-Speed Transmssion The 6L80E has a gear ratio spread of 4.03, 2.36, 1.53, 1.15,.85 and.67. drag racing, Enter transmission and rear tyre data in the yellow boxes. 5) 06 si and 04-06 tsx have same 6th gear. 3) K20A2, K20A euro-r, K20Z1 all have the same 1-6 gear ratios. Again thinking in terms of distance, consider fourth gear or direct as your final destination. 9310 steel would be used in Pro Stock, Pro Mod and other similar applications where substantially more HP, torque and tire plant is generated. The Muncie M21 and M22 Close ratio 4 Speed was the closest ratio 4 speed ever put into a production car. A simple flip of the gear lever on the side cover gives the driver the illusion of three normal speeds and a fourth that is overdrive. First Gear Second Gear Third Gear Fourth Gear Fifth Gear Sixth Gear; 2008-13 Corvette: 2.66: 1.78: 1.30: 1.00: 0.74: 0.50: 2008-09 Corvette Z51: 2.97: 2.07: 1.43: 1.00: 0.71: 0.57: 2009 Pontiac G8 GXP: 2.97: 2.10: 1.46: 1.00: 0.71: 0.56: 2009-13 Cadillac CTS-V: 2.66: 1.78: 1.30: 1.00: 0.80: 0.63: 2010 Camaro SS: 3.01: 2.07: 1.43: 1.00: 0.84: 0.57: 2012-15 Camaro ZL1: 2.66: 1.78: 1.30: 1.00: … With the ability to make over 1000hp on the street today, transmissions are pushed harder and harder and G-Force understands. At 500HP, the clutches in these units go out and at 700HP you WILL start hurting hard parts. The rear case a 1.31 ratio gearset. The result will be 2.72:1 and 1.54:1 for the first gear and second gear… Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Ideally, you’ll want a final drive gear ratio of about 10:1 in first gear. When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Rockland Standard Gear (RSG) is a master distributor for ZF 5 and 6 speed manual transmissions for Ford Trucks. And the wide ratio magnum is even worse! These new five and six speeds in a sense are really wide ratio 4 speeds with additional overdrive gears for fifth and sixth speed. Six Speed Car--RPM in gears for 6 Speed Car Transmission -- You can use this for a 6 speed car type Transmission with a rear gear. Note: 4th, 5th or 6th can be either 1:1 … Jerico Drag Racing 4 Speed Revision 4 Transmission * Dog Rings and Sliders for Quick and Easy Shifting * Wide Variety of Gear Ratios Available * Stock and Super Stock Racing Applications * Aluminum Top Loader Case Aircraft Quality A206 * Caged Needle Thrust Bearings between Gears * … 1.25% ratio uses 32 tooth planet gears, a 22 tooth sun gear and an 86 thooth ring gear. One of the primary reasons why the 9" Ford rear end has come to dominate drag racing is the ease with which thirdmembers with various ring & pinion gear ratios can be installed. In late 2005, General Motors introduced the 6L80E six speed automatic transmission. As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. Air or Lever Shift. Costing only $1,700 brand new from Nissan or around half the price used, this 6-speed transmission … The gearset in the third case alone, 1.31:1, determines the third gear ratio. Specialising in transmissions, we manufacture a range of gearboxes and associated products, from stand-alone bespoke designs right through to gear sets for existing production cars. Whether you’re looking for a manual transmission as an OEM replacement part or looking to add a performance shifter to your speed machine, Summit Racing has all of the 2-, 4-, 5- and 6-speed manual trannys you need to keep charging to the front of the pack. In the example of a four speed, the case nearest the engine would contain a 1.37 ratio planet gear set. Once you understand these limits you can select optimum gear ratios to match. Gear Ratios. Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio. Our gearboxes can be found in a wide range of international classes, from GT racing right through to cross-country rallying. Gearing for cruising To find the ideal gear ratio for cruising use your RPM at peak Torque. These transmissions are assembled in ATI’s SFI case with an SFI Mopar specific bellhousing. Copyright © 2020, Lenco Racing. The biggest and most appropriate question when considering this Transmissions designed specifically for racing have a dog-drive gear engagement system with no synchromesh device to match the input and output shaft speeds to the next gear ratio before it engages. We acheive more than two speeds by combining multiple cases. The rear case a 1.31 ratio gearset. Modular Design Second gear ratio is 1.80 and third gear is a 1.31 ratio. The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car. Air servos or max-adjust shift towers. In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear. street transmission, Tuesday 8:00Am-6:00Pm Friday 8:00Am-3:00PM Phone: (330) 530-5000 It has appropriately two gears for a given speed. at a lesser price than our full race units. The following 3 theories combine to define your racing car’s limits. 195/55 x 15 = 24.44 inch tyre diameter. The middle case would also contain a 1.37 planet gear set. Lenco, the all time champion and undisputed leader in the drag racing transmissions. 2) 01-06 itr has the same 1-3 gear ratios as the 02-06 rsx-s, euro-r, and 06 si but has different 4-6 gear ratios. I also looked at it that down the road I will go bigger motor and run in the higher RPM range and did not want to do another gear change. The TCI 6X comes standard with gear ratios of 2.97, 2.23, 1.57, 1.18, 1.00, 0.75, and 1.76. By multiplying these three ratios you come up with a 2.46 first gear ratio. We are able to offer the ST1200 Street/Strip at lower cost than our pure race CS1, CS2, CS3 and CS4 designs since we use 8620 steel instead of 9310 material for the ST1200 gears. All ST1200 Street units now come with low drag bearings and a billet case. RSG remans these transmissions for ZF and GM and are … 3/4" Gear Set. Then, because the six-speed is splitting ratios, the rpm drop between gears is less because TCI has turned this into a five-speed automatic with an overdrive. Magnesium Case; Magnesium Tailhousing (Bushing or Roller Bearing) Read off your mph at any rpm in any gear. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. Cars can now cruise at 1800 RPM at 70 MPH because the engine's torque curve can handle the load. If we do the math in reverse and divide 87 (the new tire size) by our FDR number, we get a new gear ratio of 5.74. Elite Racing Transmissions are a UK based manufacturer of gearboxes, dedicated to motorsports at every level. With that in mind G-force manufactures a 6-Speed upgrade kit available for any T-56 variation. Final drive ratio is 1:1. What is the optimum gear ratio for your application? You can take your racing car parameters (and this theory) to then work out the best gear ratios (and final drive) for any track. Before each Pfitzner Performance Gearbox (PPG) Dog Box, S equential gearbox, gear system and gears are offered for sale they are put through an extensive test and development programme. Strut-type synchronizers are provided for longer life and easier shifting. Each sun and planet gearset provides two speeds. The further you get away from 1:1 ( direct ) you in a sense get wider. The internal action of a LENCO is such that when the transmission is in first gear the dedicated planet gear assembly provides the launch ratio. The ST1200 transmission is pure Lenco through and through and is ideally suited for nitrous, blown, injected and carbureted engines producing up to 1200 HP and 900 lb ft of torque. Gearing for the strip To find the ideal gear ratio for drag racing use your RPM at peak HP. All Rights Reserved. For our purposes, we’ll use a 26.5-inch-tall tire with a 4.11 rear gear ratio, and a goal of 2,600 cruising rpm. The TH400 transmission – known as the Turbo 400 by drag racers and auto enthusiasts – is an incredibly durable three speed automatic transmission. Hours: Monday,Wednesday, Thursday 8:00-4:30 PM. By reducing the 6ths gear ratio you’ll let your car achieve a higher speed (and thus you will beat the computer). Since each case contains one gearset and provides both underdrive and direct drive, multiple cases (gearsets) provide multiple underdrive ratios. Light weight components. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. Editor's note: Chrysler described the change as "an A-833 four-speed transmission, converted over to a three speed manual transmission with an overdrive gear ratio." Final drive ratio is 1:1. The wide overall ratio spread of 6.04:1 allows a “steep” first gear, as well as a very “tall” overdrive top gear for low-rpm highway cruising. Modular Design Second gear ratio is 1.85:1; third gear ratio is 1.31:1; fourth is 1.00:1 and as pointed out earlier, fifth is overdriven at 0.77:1. This is the prime example of how an overdrive transmission change would benefit: 1969 Corvette with an original Muncie M20 that has a 2.52 first gear ratio with a 3.36 rear axle gear ratio. ATI can build up your 6L80E transmission for up to 1000HP. Then, change Richmond's performance gear ratios and beat your best time! It's ratios were 2:20 first, 1.64 second, 1.28 third, 1:00 fourth. Final drive ratio is 1:1. That is why I sell 99.9% of the close ratio transmissions, and always recommend the close ratio. Master Overhaul Nevertheless, affordable 6-speed options still exist. The other option is to change the first-gear ratio in the transmission. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing TCI Gear Ratios JavaScript seems to be disabled in your browser. Limited to the “EXTREME” ratio chart. Example: If your max HP is at 6300 RPM use 6300 for the RPM. That puts us at a speed of 67.4 mph in 5th gear, just about right on the typical highway speed limit. The original concept of the Richmond 6 speed was that it was based on the Richmond 5 Speed ( the old Doug Nash 4+1). This will "stretch" the gears with the best possible ratios for a harder launch. Second gear ratio is 1.80 and third gear is a 1 .31 ratio. Pro Stock Z Ratio Chart; EXTREME 4 & 5-Speed Transmissions. And not only for your racing car on a drag strip (unless that is your thing) but optimised for your racing car on a specific racetrack. Manufacturers such as TCI Automotive offer complete gear sets (or complete transmissions) with a first-gear ratio of 2.10:1. Fits C7 Corvettes with 8-speed and the ZR1. Since 5th gear is direct and not an overdrive gear you get nice close ratio shifts ( rpm drops less than 25 percent) all the way up 5th. This makes use of every bit of power the engine is producing at max RPM. Gear & Transmission Calculators. All three units shifted equal final drive ratio of 1:1. Enter your 1/4 mile race car's information into our calculator to see how well you will perform. Rated to approximately 3,000 horsepower at 3,600 pounds. The ST1200 is available with all popular bellhousing patterns - Ford, GM, MoPar and our own five-bolt design. Each LENCO transmission is thus a two speed and is housed in one dedicated two speed. 1.44% ratio uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear. For example, the default figures in the chart are for a stock ratio transmission as fitted to a Type 1, 1303S (3.88 ring and pinion). To keep the same rpm and be in 6th gear, the cruise speed goes up to 99.75 mph, something law enforcement might not be too keen on! The ST1200 gives you the advantage of Lenco brute strength at a lesser price than our full race units. Tuesday 8:00Am-6:00Pm Friday 8:00Am-3:00PM Phone: (330) 530-5000 The wide overall ratio spread of 6.04:1 allows a “steep” first gear, as well as a very “tall” overdrive top gear for low-rpm highway cruising. The C6 transmission comes with First, Second, and Third gear ratios that are 2.40:1, 1.40:1, and 1:1 respectively. In general, all LENCO transmissions are a planetary design. At 500HP, the clutches in these units go out and at 700HP you WILL start hurting hard parts. Standard gear ratio is the OEM 2.48/1.48. That is what our rear gear should be in order to keep our FDR at 15.1663. 8620 is a premium quality material that will provide excellent service for 1200 HP hot rods. You may choose any conventional input shaft spline. Thus a 1:1 ratio is achieved. Tags: As mentioned, the C6 transmission is quite strong and was paired with many of the larger V8 engines from Ford. Choice of standard or new generation reverses. We supply premium grade bearings in the ST1200 instead of the much more expensive aerospace-spec bearings as used in our race transmissions. Engineered for 1200 HP. 4-Speed $8,650 5-Speed $9,450. Multiply all three gearset ratios to determine the first gear ratio … And the wide ratio magnum is even worse! Example: If your max … The aftermarket has responded to this by offering a plethora of ratios ranging from 2.91 to 6.50:1. Our combined first gear ratio would be [3.36 x 2.52 = 8.46], not too bad for a 427 cubic inch engine with plenty of low rpm torque. ... your 6 speed can be wonderous... because on a flat road you are in a higher gear and at the same speed going up a hill you are in a lower gear. bellhousing patterns - Ford, GM, MoPar and our own five-bolt design. To keep the same rpm and be in 6th gear, the cruise speed goes up to 99.75 mph, something law enforcement might not be too keen on! GEAR RATIO CALCULATOR. The original concept of the Richmond 6 speed was that it was based on the Richmond 5 Speed ( the old Doug Nash 4+1). Any new EXTREME transmission is available set up for a Torque Converter Drive Unit at no extra charge. As an example, combining the TCI Six-speed’s 2.97:1 First gear with a 3.50:1 rear gear ratio is equal to a traditional TH-400 (or stock 4L80E) with a 4.19:1 rear gear. 6 speed. Manual Transmission Gear Ratio Charts for GM/Chevy Vehicles Posted by OnAllCylinders Staff on October 27, 2017 at 12:44 pm Gear ratio affects a variety of driveline combinations, so it’s important to know what the gear ratios are for a gearbox you might be swapping into your ride. This calculator assumes you know the vehicle’s transmission ratio. Gear Ratios Calculator, MPH, Top Speed This calculator outputs the how fast a car can go in each gear as calculated by the gear ratios, engine redline and tire size. A continuously variable transmission (CVT) is a type of automatic transmission that can change the "gear ratio" (gears are not generally involved) to any arbitrary setting within the limits. This 6 speed is the best 6 speed design out there. Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. The 4L80E’s 2.48, when multiplied to the rear axle ratio of 4.10:1, yields a close 10.16:1 – whereas the 4L60E’s gear ratios are harder to work with, even with another rear axle ratio like 3.73:1. Shifting at 5000rpm from 3rd gear into 4th (76mph), sees engine speed drop by almost 1500rpm, to a little over 3500rpm. Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio. Hours: Monday,Wednesday, Thursday 8:00-4:30 PM. If you were running at 2500RPM in 6th gear with the close ratio magnum and the 3.13 6speed diff, you'd be going 100 MPH!!! Since 5th gear is direct and not an overdrive gear you get nice close ratio shifts ( rpm drops less than 25 percent) all the way up 5th. ATI is now developing components to upgrade your 6 and 8 speed transmission! Chevy Pilot Bearing Assembly 1955-2000 Chevrolet (SB & BB), and Lenco transmissions. The gearset in the third case alone, 1.31:1, determines the third gear ratio. Nonetheless, a wide-ratio gearset can be used to provide a First gear ratio that is numerically larger. By the end of it, you will have a solid understanding of what goes into defining (and then selecting) the very best possible gear ratios for your racing car. Here is a down-and-dirty way of picking the best gearing for a particular car from three choices: 3.07:1 final drive with a wide-ratio transmission, a 3.07:1 final drive with a close-ratio transmission, and a 3.36:1 final drive with a close-ratio transmission. 8L90E TRANSMISSION FILTER - OEM REPLACEMENT, 6L80E 6L90E UPGRADE KIT - INLCUDES ALL PART #S BELOW, 6L80E / 6L90E 11 PCS BUSHING KIT - TEFLON COATED DURA BOND, 6L80E EXTENSION BUSHING - TEFLON COATED DURA BOND, 6L90E EXTENSION BUSHING - TEFLON COATED DURA BOND, 6L80E / 6L90E PUMP BUSHING - TEFLON COATED DURA BOND, HDXTREME™ CLUTCH & FRICTION KITS. Low drag (angluar contact and needle bearings). transmissions, As an example, combining the TCI Six-speed’s 2.97:1 First gear with a 3.50:1 rear gear ratio is equal to a traditional TH-400 (or stock 4L80E) with a 4.19:1 rear gear. Stay up to date with news and promotions by signing up for our monthlly newsletter. The ST1200 comes with aluminum cases instead of the magnesium style race units. sr1200, Its eight-speed successor, the 8L90E was introduced in 2014. For more specific information on any of these Lenco transmissions please refer to the Tabs below, or call our tech line at (909) 673-9080. Nova Racing Transmissions Ltd Unit 12 Star Road Industrial Estate, Star Road, Partridge Green, West Sussex, UK, RH13 8RA Tel: 01403 711312 Fax: 01403 713207 Email: [email protected] Company Number: 2438157 As with all Lenco transmissions the ST1200 is a planetary design and comes with up to 6 forward speeds. 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. That's a little higher than most people want their "cruising gear"!!! Drag Performance Calculator By AssassinRacing.com Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches. Gearing Your Transmission for the Strip. The aftermarket has responded to this by offering a plethora of ratios ranging from 2.91 to 6.50:1. The RICHMOND Super T-10 is a four speed countershaft helical gear transmission synchronized in all forward gears. Using the Gear Ratio Calculator, we entered the necessary data, and got our results. Now my starting-line ratio is 2.10 x 4.10, or 8.61:1, and I have corrected it without changing acceleration the rest of the way down the track. ATI can build up your 6L80E transmission for up to 1000HP. The rear case a 1.31 ratio gearset. Second gear ratio is 1.80 and third gear is a 1.31 ratio. 1.38% ratio uses 23 tooth planet gears, a 28 tooth sun gear and a 74 ytooth ring gear. The T-10 is used in applications for performance type automobiles and light trucks. Again, something useful only for very rapid acceleration (racing). If you were running at 2500RPM in 6th gear with the close ratio magnum and the 3.13 6speed diff, you'd be going 100 MPH!!! This calculator will help your hot rod or street machine get to the next level without red-lining your engine. Using the T-10 design, the two speed has only two forward gears and reverse, making for less rotating weight, which equals more horsepower. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio. Shift with either our patented multi lever system or with the optional, more compact CO2 setup. Whether you have a power adder or just big cubic inches, we know this is … 8. Second gear ratio is 1.80 and third gear is a 1 .31 ratio. The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car. The appropriate flexplate, crank adapter and required bolts are also included so a standard GM converter with a small bolt circle drops right in. You must multiply each cases underdrive ratio in order to determine the first gear ratio. Tyre diameter is automatically calculated from tyre profile info e.g. 6L80E 6-Speed Transmssion The 6L80E has a gear ratio spread of 4.03, 2.36, 1.53, 1.15, .85 and .67. The TCU is programmed with a start up calibration file for the 6X, but some basic inputs are required for each application prior to use of the transmission. This L.. Then, because the six-speed is splitting ratios, the rpm drop between gears is less because TCI has turned this into a five-speed automatic with an overdrive. Choices like this are available for … Final drive ratio is 1:1. multi lever system or with the optional, more compact CO2 setup. ATI is now developing components to upgrade your 6 and 8 speed transmission! The planet gears are driven by an encompassing ring gear. That is why I sell 99.9% of the close ratio transmissions, and always recommend the close ratio. Editor's note: Chrysler described the change as "an A-833 four-speed transmission, converted over to a three speed manual transmission with an overdrive gear ratio." Drag Performance Calculator By AssassinRacing.com Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches. As a final high gear ratio, you want one to one or lower. That's a little higher than most people want their "cruising gear"!!! Brek is right When I did my drag car I went with 4.56 with 9 x 28” M/T slicks car started with a 304 w/big cam & auto w/4000 stall. Lenco celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. Lenco Parts and Price List is available here. Gearing is the ratio of input revolutions to output revolutions. Light weight ring gears (units w/27 and 32 spline shafts only). The CVT is not constrained to a small number of gear ratios, such as the 4 to 6 forward ratios in typical automotive transmissions. The 4-speed above shows how to determine drive ratios. Ideally, you want your low gear ratio to be around three or four to one. 1.48% ratio uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear. Over the course of this short series, we'll take several hypothetical and … You may choose any conventional input shaft spline. We also remanufacture the ZF S6-40 transmission found in the C4 Corvettes from 1989 to 1996. Shifters and lockouts can be either style. A simple flip of the gear lever on the side cover gives the driver the illusion of three normal speeds and a fourth that is overdrive. Throwout bearing collar (4 & 5-speed only). This article digs into this. 4) all 6-speed tranny’s except 02-04 rsx-s & 06+ CTR, have the same 4.764 FD. Kits, 8L90E HDXTREME™ Clutch & Friction Kits, © 2019 ATI Performance Products, Inc | All Rights Reserved | Prices subject to change without notice. To stretch the gears in a RWD car such as the Ford GT, raise the final gear ratio to roughly 1.000 higher than the minimum, then slide the top speed slider all the way to the left, then proceed to move the final gear slider back to its minimum.