Stall speed increase for higher weight = old speed + 1/2 % increase in weight e.g. Stalling is when the torque converter locks up during a load. Engines can lug to the point it's unmistakeable, but like detonation, there are lesser levels where the driver really can't tell. Let's start with the "stall". Torque Converter 2500 Stall Series Ford C4 Hughes Performance 42-25. Why it matters? 20 $1,042.78. A converter behind a 302-2V will stall at a lower speed than the same converter behind a 351-4V. – 8-inch Converter: From 4,000 to 7,000 rpm stall speed – 9, 10, and 10.5-inch converter: Typically used in power-adder applications. This is difficult to discuss. Its just like putting a standard transmission in 1st. That it had that, plus the better launch? The range level will tell you a lot about what to expect from the torque converter. A high stall converter can easily make enough heat to fry a transmission if you hold it on the line long enough at full RPM if the stall speed is above 3,500 RPM or so, so a good tranny cooler is essential when running ANY type of high stall converter. Ease back into it, it came back up by 200 RPM. Why is it important? Loading... Resume … ! Summit Racing SUM-G2698 - Summit Racing® Torque Converters . Your browser either does not have JavaScript enabled or does not appear to support enough features of JavaScript to be used well on this site. But I was in for another surprise. These units are available with diode stators and balloon plates. And at 4000 stall, it's not just the smaller diameter. 1979 Firebird. With the TH350, the launch is what the converter helps most. Instructions: Enter the tire information found on the sidewall of your tire. Most street performance cars running your typical "performance" cam should be running a stall converter in the 2,800 - 3,000 RPM area. Sale. But I soon got curious about the converter slippage: Cruising along at 55 MPH, lift off the throttle, the RPM instantly dropped 200 RPM. ! A high stall converter can easily make enough heat to fry a transmission if you hold it on the line long enough at full RPM if the stall speed is above 3,500 RPM or so, so a good tranny cooler is essential when running ANY type of high stall converter. We measure torque by multiplying two factors—amount of force applied and distance from the point of application. All late model dynamometers have a software program that commands the loading and speed of the vehicle over a certain period of time while making a test pull. I finally stopped playing in traffic and got on the highway. Historically, many different systems of units have been used, where a system of units is defined as a collection of units of measurement with rules that relate them to each other. My B&M TorqueMaster 2400 converter mentioned above, was a loose 12". There is NO slippage what so ever. A converter optimized for drag racing will have a stall speed much higher than a street converter. A 1995 Camaro Z28 convertible with the LT1, 4L60E, 2.73:1, and 235/55R16 tires. Wish List Compare. So far, our All About Stall series has focused on engine setup and its effect on torque converter stall speed selection. The following chart shows the expected stall range for TCI Torque Converters. Stall speed is dependent upon the torque output of the engine it's attached to. Combination 4: A 1985 Camaro with a mildly modified L69, TH700R4, 3.42:1, and sticky 215/60R15 tires. 3- Determine the type of transmission to be used. Stall speed will vary according to your particular engine combination. That was your "foot-brake stall" unless there was tire spin. My slippage was always 1200, maybe because someone or something had caused it to fall off a workbench some weeks prior. Racing calculators for determining horsepower, ET, MPH, converter slip, engine displacement and more. A disadvantage with the popular three element torque converter is that its stall torque ratio is only in the region of 2:1, ... Eq. Torque Conversion Calculator. Assuming everything is functioning normally, the tach will jump to at least 1200 RPM, before the car actually begins to jump forward. L4, 4L60E/4L65E Transmission- converter 1600 to 2500 stall No core charge . On a street car, the penalty in gas mileage and heat generated by a high stall converter favors a lower stall. Related Items. Is it all in the launch? Stall speed is the speed at which the converter holds back or limits the engine speed if the transmission output is prohibited. The first mod in the drivetrain should be making sure you're not running a 2.73:1 axle ratio with 26" tires. This converter stall is equivalent to a stock converter stall. K FACTOR: 100. Sale. % Converter Slip Calculator. I was so stunned to discover my slippage wasn't 200 RPM. $545.00 Monster Sale Price: $435.53. Related Items. Torque is twisting force that tends to cause rotation. By doing your research and talking to knowledgeable people like those at the manufacturers, you will avoid having a pile of torque converters that are not correct for your application. The range listed will tell you what to expect from the converter. And if your converter is too tight, it might also hurt your MPG. They're referring to the outer diameter of the whole converter. Torque Converter Stall Chart. Tires were 25" diameter. There are no reviews for this product! Yes, a total slip at WOT of 400 RPM. $323.99 New. Add to cart. 17-250. According to Greg, "A 2,500-rpm stall speed converter in a T-bucket will probably stall around 1,800 rpm, but put the same converter in a pickup and that'll go … TORQUE CONVERTER SPECS Stall: 2800-3200 Family: Demolition Pro-Competition Size: 10" Bolt Pattern: TH350 / TH400 Engine: ALL Brazed Impeller: YES Brazed Turbine: YES Bearings: 3 Washers: 0 Diode Stator: NO Balloon Plates: NO. TH400 Torque Converter 1350 Stall Heavy Duty, 3 Lug . 3500 + stall converter. A disadvantage with the popular three element torque converter is that its stall torque ratio is only in the region of 2:1, ... Eq. NO! But then I tried it the other way: stomping the gas, RPM climbed another 200 RPM. No traction in first gear, very very fun! Had it been a tight 10.5", still 2400 flash stall, it would have been much less slip, and much less irritating. With an automatic, how much the RPM drops from the upshift isn't controlled by gear ratios alone. Torque Converter Stall Speed and Driving. Hughes Performance GM25 Torque Converter 2500 Stall Th350 Th400 . See: How to choose the stall speed of a converter? We measure torque by multiplying two factors—amount of force applied and distance from the point of application. Diameter, 2,800-3,200 Stall… It was hell. This converter works well with: 2 nd generation Dodge with 60 - 62mm turbos at 0 - 4,000 ft elev. We will try to keep this short because high stall torque converters is a pretty involved subject. Converter stall speed must be high enough to put the engine into the torque range where it can most efficiently launch the car. Save $10 off $299, $20 off $699, $30 off $899, $100 off $1,899 Orders - Promo Code: HIGHGEAR exclusions apply. Just installed a 2800 stall torque converter in my 1971 Nova 496 engine. For this we must assume you got the tune right and run enough octane, etc. TCI Torque Converter Series: Adv. high stall torque converter. For DC Motor torque Formula: For Calculating, Torque for DC motor. The instant after an upshift is called the shift recovery. Torque is twisting force that tends to cause rotation. Generally speaking, your normal driving is not adversely affected by converters with stall speeds up to 3000 RPM. But as with all things camshaft related, these are for the 350 SBC engine. When a high stall speed converter is installed, the engine rpm increases under certain conditions and so does the fluid temperature. 3 rd generation Dodge with 63 - 71mm turbos. So far, our All About Stall series has focused on engine setup and its effect on torque converter stall speed selection. If you're studying the Comp Cams catalog for example, you'll note that once you look past the smallest cams, they begin noting stall speeds. I decided on a B&M TorkMaster 2400. The following chart shows the expected stall range for TCI Torque Converters. Torque Converter Stall Speed Test This MEVAS article is about: How and why to perform a so-called Stall Test. For instance, if you have a car that has a 2,500 RPM stall converter, and then you hold both gas and brake at the same time, like you were going to power brake, then general RPM that the tires will break loose at is going to be 2,500 RPM. The action of the converter’s stall is what helps the car accelerate at a peak level once the driver applies the power to the driveline. In later years, I came to learn that this is typical of most stock GM converters, though I doubted, and still doubt, that that converter was stock. Tuning and fuel quality are your responsibility. Investing.com – India stocks were lower after the close on Friday, as losses in the Auto, Metals and Banking sectors led shares lower.. … 3500 + stall converter. Give Us A Call 800-708-0087 . Tuning and fuel quality are your responsibility. Stall speeds are a great way to rate torque converters performance level. While testing an earth-moving machine with a Stall Test we can gain information about engine performance, torque converter condition, transmission condition and … gear and letting out the clutch. 4- Order your converter after you know all of the engine and driveline specs that will affect the stall speed design. Your vehicle will begin to roll normally and acceleration will be favorably influenced when high stall speed converters are used. Converter Slip Calculator. Most street performance cars running your typical "performance" cam should be running a stall converter in the 2,800 - 3,000 RPM … A so-called Stall Speed Test can be performed for all machines (cars & trucks) with a torque converter. Add To Cart Got Questions? For this we must assume you got the tune right and run enough octane, etc. Torque Converter, 30-spline Input, 10 in. I replaced the trans, and still no lockup. 1978 Camaro LG3 (145 HP 305) TH350, swapped stock 1200 stall for B&M TorkMaster 2000 converter, 3.08:1 rear axle, 235/70R15 tires. What is cruising rpm? Converter stall speed must be high enough to put the engine into the torque range where it can most efficiently launch the car. The Mountz torque calculator allows you to convert torque measurement from one type of unit measurement to another. AOD Torque Converter 3300-3500 Stall … Mostly. Torque Converter 2500 Stall Series Ford C6 Hughes Performance 43-25. But don't do it for more than a couple of seconds to avoid over heating the converter and transmission. For racing, you want a stall right at or not more than about 500 RPM below the RPM at which your engine makes peak torque. Here omega ω is equal to 2 x pi x N (rpm) / 60. Quick View. TORQUE CONVERTER SPECS Stall: 2800-3200 Family: Demolition Pro-Competition Size: 10" Bolt Pattern: TH350 / TH400 Engine: ALL Brazed Impeller: YES Brazed Turbine: YES Bearings: 3 Washers: 0 Diode Stator: NO Balloon Plates: NO. Converter stall speed needs mostly center on your camshaft, heads, compression, gearing, vehicle weight, vehicle use, and expectations. 9Kg weight, 2 and 4 stock engines, 1.3 HP power. It's not as simple as less stall = more MPG. AOD Torque Converter 3300-3500 Stall Heavy Duty. That is your "flash stall". Torque Converter Slip (%) % Speed: MPH: KPH : Tire Size Calculator. (26.8) can be used to calculate the overall gear ratio required to achieve a desired speed V rmp, if we know the rotational speed of the motor, N motor. Quick View. V => Input DC Voltage. V => Input DC Voltage. T = V x I / (2 x pi x N (rpm) / 60) N (rpm) is the speed of the motor. than with a closer ratio TH350. $323.99 New. I => Input DC Current. Here omega ω is equal to 2 x pi x N (rpm) / 60. "Converter stall" refers to the condition where the converter speed ratio is zero (that is, output speed is zero). Hughes Performance GM25 Torque Converter 2500 Stall Th350 Th400 . … 5 out of 5 stars (2) Total Ratings 2, $347.75 New. For this we must assume you got the tune right and run enough octane, etc. But would that 2000 rpm stall speed converter have helped the 1978 Camaro with a 305 in town, had the carb been repaired? Torque Conversion Calculator. A converter optimized for drag racing will have a stall speed much higher than a street converter. On a street car, the penalty in gas mileage and heat generated by a high stall converter favors a lower stall. Add To Cart Got Questions? Sign in to check out Check out as guest . torque converters, performance torque converters, torque converter, stall converter, stall converters, stall torque converter. That looseness is most of why it was able to slip 1200 RPM all the time. Either way, its too low of a stall … The speed of the motor can be found by using Speed measurement devices. If a 2700-3000 is selected, you should be able to footbrake stall the converter to about 2700 rpm depending on the vehicle’s setup. 3.7 out of 5 stars (3) Total … Now, repeat, but this time keep your left foot HARD on the brake pedal. Great converter for playing, needs some rear gear. Watch some vids on YouTube where guys have recorded their gauges while driving around. Camshaft Duration: Rear Gear Ratio: Engine Characteristics: Expected rpm Stall Speed: Small Block : Big Block: Sizzler / Street Rodder: Stock - 260° Stock - … T = V x I / (2 x pi x N (rpm) / 60) N (rpm) is the speed of the motor. So I stomped the go pedal, the RPM shot up by another 350, for a total of 400. Yes, their results are combination-dependant, but I watched a 4000 rpm stall converter drive tighter than my 2400 stall. 5 out of 5 stars (2) Total Ratings 2, $347.75 New. But the driveability? Your actual stall speed may vary. So anytime you're in gear, with the vehicle stopped (trans input speed of zero, foot on the brake) and the engine … Compared to a stock converter, this should provide anywhere from 500 to 1500 more rpm to … Torque Converter Slip (%) % Speed: MPH: KPH : Tire Size Calculator. $71 for 24 months with PayPal Creditopens a installment calculator layer* $71 for 24 months. Or the company will send me a … Find great deals on eBay for 3000 stall converter th350 and th350 3200 stall converter. 2. Minimum purchase required. Your actual stall speed may vary. It drove pretty stock, until I swapped the heads. Summit Racing SUM-G2698 - Summit Racing® Torque Converters. I watched mostly LS1 F-car guys' vids, but that's enough to illustrate the point. (26.8) can be used to calculate the overall gear ratio required to achieve a desired speed V rmp, if we know the rotational speed of the motor, N motor. If you have an automatic transmission, then you don't have a clutch pedal. mc5871 hyd 5 244 254 313 328 .510 .533 107 117 3500-7500 very rough 817 comment: good for pro, street, bracket, oval racing. For example a tire that is marked 205/65 R16 has a tread width of 205, a profile of 65, and a wheel size of 16". Write a Review. This was like God's own pillow-covered sledgehammer to the heiney. Hence motor torque T = P / ω . Bolt-Together Drag Race Torque Converter GM 6L80E (2600-2700 Stall Range) SKU 242972R. Loose converters are great when your static compression is way low, or way high. Choosing converters is also about size. Nothing you've ever experienced at any amusement park even comes close, either. Then do a gentle drive afterward to cool down the parts. What does it mean when a torque converter "locks up"? A change to a B&M converter gave my combo a 1700 RPM flash stall. Everything you need for anything you drive. Allowing the engine to get into the power band quickly more than compensates for the disadvantage of lower efficiency. Enter the RPM, Tire Height in inches, The Rearend Gear Ratio, The Transmission Top Gear Ratio, and The MPH, Then Press 'Enter' Key Conv Slip% = [((RPM * Tire Height) / (Rearend Ratio * Trans Ratio * MPH * 336)) -1] * 100 RPM Tire Height Rearend Ratio Trans Ratio MPH. I could, occasionally, chirp a tire from a dead stop. The stall speed assigned is simply a way to rate the converter’s performance level. It pushed me into the seat noticeably more, and I loved it. turning took like half throttle. 2- Determine the converter stall speed requirements based on the powerband of your camshaft. Rough idle, large fuel system, raised compression ratio, Rough idle, large fuel system, raised compression ratio, top end power, Up to 750 hp with power adders, custom application. It was just 50 RPM! Torque Converter 2500 Stall Series MOPAR 727 Hughes Performance 24-25. Also applies to lockup style when not locked. As a general rule for street use, obtain a stall speed with a minimum of 500 rpm into the powerband. The converter was an 1800 rpm stall. 2/17/2021 12:53:54 PM PONTIAC POWER RULES ! That thing needed 10.5:1 compression, but a full summer of tuning got it driveable. by: Cobalt327, Crosley, Jon, Jrober587(Click here to edit this page anonymously, or register a username to be credited for your work.). torque converters, performance torque converters, torque converter, stall converter, stall converters, stall torque converter. Bookmark or "Favorite" this page by pressing CTRL + D. Select input type: Select output type: Result: Converted Torque: **Note: All of our calculators allow SI prefix input. If you've ever felt a jet plane on takeoff, this puts them all to shame. Estimate Converter Slip Wallace Racing BACK to Auto Math. For most mild SBC 350s, torque peak is typically in the 3500 RPM range. Give Us A Call 800-708-0087 . wt inc. 20% stall speed inc. 10% therefore if old speed is 100 kts new speed is 110 kts. With taller tires, a bit more than 2.73 gear ratio. There are no reviews for this product! high stall torque converter. But not only that, having more gear also takes load off the transmission. Hence motor torque T = P / ω . These units are available with diode stators and balloon plates. If a 2700-3000 is selected, you should be able to footbrake stall the converter to about 2700 rpm depending on the vehicle’s setup. Add to Cart. This converter will be approximately 300 RPM … The range listed will tell you what to expect from the converter. This chart is ONLY a guideline. Pasternack's Torque Conversion Calculator allows you to convert either a single torque or a torque range between Newton-meters, foot-pounds, and inch-pounds. mc5871 hyd 5 244 254 313 328 .510 .533 107 117 3500-7500 very rough 817 comment: good for pro, street, bracket, oval racing. A unit of measurement is a defined magnitude of a quantity that it used as a standard for measurement for the same kind of quantity, such as measurements of length, weight, and volume. The speed of the motor can be found by using Speed measurement devices. After all, my previous 1978 Camaro LG3, TH350, 1200 rpm stall, 2.41:1, with 205-75R14 tires did 23 MPG with a best of 26 mpg! TCI Torque Converter Series: Adv. 20 Or the tires go up in smoke, depending on your combo. TORQUE RATIO: 1.76. And by launching, I mean flooring the gas the instant the light went from red to green. 2,000+ Results Found For "stall converter" Filter Results Filter by Vehicle Individual Parts; Part Groups; Results 1 - 25 of 2000 + 25 Records Per Page Best Keyword Match Sort . 67 - 71mm turbos at 0 - 4,000 ft elev. But how to tell, the reduced slip at cruise? All late model dynamometers have a software program that commands the loading and speed of the vehicle over a certain period of time while making a test pull. Best Offer: Make Offer. Bookmark or "Favorite" this page by pressing CTRL + D. Select input type: Select output type: Result: Converted Torque: **Note: All of our calculators allow SI prefix input. A very high stall converter (greater than 3000 RPM) would not be satisfactory for street use. 3500 + stall converter. A 2400 RPM stall may hurt MPG, in town and on the highway but a LOT depends on how often the vehicle is driven hard. Free Shipping over $149 Same Day Shipping before 11pm; Price Match Guarantee ; Free Shipping over $149 Same Day Shipping before … In the converter, the impeller is connected to the engine, and the turbine (the output member) is connected to the input shaft of the transmission. Write a Review. Generally speaking, your normal driving is not adversely affected by converters with stall speeds up to 3000 RPM. Partly. The stall speed assigned is simply a way to rate the converter’s performance level. More gear reduces the load that the converter feels. TH400 Torque Converter 1350 Stall Heavy Duty, 3 Lug . For example a tire that is marked 205/65 R16 has a tread width of 205, a profile of 65, and a wheel size of 16". I => Input DC Current. When it comes to choosing a torque converter, one size certainly doesn’t fit all. wt inc. 20% stall speed inc. 10% therefore if old speed is 100 kts new speed is 110 kts. We’ve covered the importance of things like camshaft selection, engine operating rpm, and even exhaust backpressure.. Another key part of the equation, according to ACC Performance president and CEO Nelson Gill, is vehicle setup. The B&M TorqueMaster 2000 was much more efficient than the stock converter it replaced, and was also more efficient than what was in my 1979 Firebird. The item you've selected was not added to your cart. This converter was stock, it was 1200 RPM flash stall. Most stock converters stall between what you have heard, 1200~1600 rpms, and Ford used the same converter in all 68-up 240/302/351 FMX equipped cars. We will try to keep this short because high stall torque converters is a pretty involved subject. … And a cam that's way too big is the same soggy feel as too low compression. The Demolition Pro-Competition is a high-performance AOD stall converter of 10" design with and expected stall speed of 2800-3200 RPM for racing applications. Are all converters rated by the same standards? Same with taking weight out of the car. The Mountz torque calculator allows you to convert torque measurement from one type of unit measurement to another. Save $10 off $299, $20 off $699, $30 off $899, $100 off $1,899 Orders - Promo Code: HIGHGEAR exclusions apply. 2. Expected Stall RPM: Converter Series: Advertised Cam Duration: Rear Gear Ratio: Engine … For DC Motor torque Formula: For Calculating, Torque for DC motor. Converter stall speed needs mostly center on your camshaft, heads, compression, gearing, vehicle weight, vehicle use, and expectations. Way low, it covers the soggy off-idle. Torque Converter 2500 Stall Series Ford C6 Hughes Performance 43-25. This page has been accessed 37,784 times. First experiences are always more vivid than follow-ups, and that's the case here. … In you select a 2700-3000 converter, it should be able to footbrake stall the torque converter to about 2700 rpm considering the automobile setup. Lesson learned: Normal slip of torque converters. I'm trying to calculate the stall current for a 12 V DC gear motor (919D1481): No load speed = 15800 RPM No load current = 0.52 A Nominal speed = … This will give an approximation of your tire diameter and rollout. We’ve covered the importance of things like camshaft selection, engine operating rpm, and even exhaust backpressure.. Another key part of the equation, according to ACC Performance president and CEO Nelson Gill, is vehicle setup. Still, lockup no longer worked. $359.14 New. This will give an approximation of your tire diameter and rollout. Converter stall speed needs mostly center on your camshaft, heads, compression, gearing, vehicle weight, vehicle use, and expectations. Torque Converter Stall Speed and Driving. $545.00 Monster Sale Price: $435.53. $359.14 New. The software used in these dynamometers is setup to be used with a locked 1:1 connection between the engine and the rear wheels, such as using a standard shift transmission in 3rd … For this reason, the torque amount is written in units of … Stall speed inc. in turn = old speed x square root of load factor e.g. With Vortec or aftermarket heads, the torque peak might be marginally to quite a bit higher, depending on the intake port volume and intake manifold size and type. Your actual stall speed may vary. Adding to your cart. You have a torque converter instead. This chart is ONLY a guideline. 2800+ stall converter. Pasternack's Torque Conversion Calculator allows you to convert either a single torque or a torque range between Newton-meters, foot-pounds, and inch-pounds. 3500 + stall converter. Shop with confidence. Nope. Whil… Torque Converter 2500 Stall Series Ford C4 Hughes Performance 42-25. Torque Converter 2500 Stall Series MOPAR 727 Hughes Performance 24-25. According to Greg, "A 2,500-rpm stall speed converter in a T-bucket will probably stall around 1,800 rpm, but put the same converter in a pickup and that'll go up to around 2,800 rpm." It felt like I had swapped to a 350, when launching. Please add content, and help with cleanup. Allowing the engine to get into the power band quickly more than compensates for the disadvantage of lower efficiency. mc1996 hyd 5 244 244 318 318 .510 .510 106 112 3200-7000 very rough 817 comment: good for pro, street, bracket, oval racing. For instance, if you have a car that has a 2,500 RPM stall converter, and then you hold both gas and brake at the same time, like you were going to power brake, then general RPM that the tires will break loose at is going to be … It had an 8.3:1 compression 302 with Roush 200 heads, a Comp Magnum 292 cam, headers, intake, carb, 3500 stall, C4, 3.80:1 spool. A 1965 Mustang. It would likely use a 3,200 to 3,500 stall converter to get the best performance. Quick View. Did that mean a total of 400 RPM of slippage? This chart is ONLY a guideline. But no denting was found. Way high, a loose converter helps reduce detonation. This machine can be run for 2 hours with 1 liter of petrol and paddy of about 3 bighas of land can be harvested. Also, a high stall can be annoying to drive on the … My flash stall was now 2400, twin black stripes became effortless, from a rolling 5 MPH start, and even starting with the 4-wheel disc brakes applied enough to keep the car stopped, getting both tires Instructions: Enter the tire information found on the sidewall of your tire. Stall speed inc. in turn = old speed x square root of load factor e.g. https://www.crankshaftcoalition.com/wiki/index.php?title=Choosing_a_stall_converter&oldid=30497. A very high stall converter (greater than 3000 RPM) would not be satisfactory for street use. Stalling is when the torque converter locks up during a load. If you're gonna pick a cam for a lesser-displacement engine, read the notes for the next larger cam. Your vehicle will begin to roll normally and acceleration will be favorably influenced when high stall speed converters are used. Learn More: VAR to MVAR Conversion Calculator. Drive your car to a deserted road, stop, watch the tach, and stand on the gas very abruptly. When your torque converter prevents the power transfer from your engine to your transmission, it increases the engine’s RPM stalls. Stock SBC converters are about 300 MM, which is about 12". Torque converters are sensitive to load as well as to engine torque. mc1996 hyd 5 244 244 318 318 .510 .510 106 112 3200-7000 very rough 817 comment: good for pro, street, bracket, oval racing. I’ve been told that the stater may have rust (by setting on a shelf)and I might bring engine up to 2000 or 2500 rpm and dropping in gear and it may break loose. This page was last modified on 24 August 2013, at 03:00. Quick View. Torque Converter Stall Chart. 2800+ stall converter. In the past, many systems of measurement were defined on a local level, and could be based on factors as arbitrary as the length of a king's thumb. Learn More: VAR to MVAR Conversion Calculator. To the point that he swapped street radials for drag tires. The following chart shows the expected stall range for TCI Torque Converters. The Demolition Pro-Competition is a high-performance AOD stall converter of 10" design with and expected stall speed of 2800-3200 RPM for racing applications. The main factors that go into calculating the stall speed for any car include the weight of the car, the circumference of the rear tires, the gear ratio, and of course, the engine’s performance level. The converter and it's effect on performance after the upshift is more pronounced with a wider ratio TH700R4 3.7 out … Converter Slip % = ? Then we went out to the exact center of nowhere, did up the 5-point race harnesses, and he let it fly. For example, if you wish to input "25000000", …