How to Calculate Stall Speed

[@PerformaBuiltTransmissions]

Phone number 888-744-6542 or visit www.performabuilt.com to order

[@michaelphelps5064]

You helped me understand the changes in stall speed I experienced. 69 Nova. As weight decreased, so did stall speed. As power increased, so did stall speed.

[@OldManRising]

ive run 3600's on my street n strips for years but moved to 4400+ on the 4L80e's with a triple disc...you CAN get the best of both....Aftermarket ECU's allow you to lock up the stall from 2nd gear on ( same as newer trans like 8l80/10l80's they ALL lock up the stall at part throttle past 2nd even if they have 10 speeds ) and that keeps the heat under control very well...had one behind a BBC with F1A-94 putting out 1300hp for 6 years near daily driving..no issues at all...this does include good PTFE line ( less internal resistence ) and swept 90s into a large stack plate cooler....also using a charge pressure transducer to polish in the tune ( so computers are still in play in whats going on in the torque converter ).....go with with more modern 6,8,10s speeds you have even more control...but even mine ill let it unlock a few ms at shift with stall LOCKED at WOT as well.....this video is more for people that dont have control over the converter in older trans.....for those I generally stop at 3600, ive had that in SO many configurations, at so many weights and power levels its just a real damn good compromise as he said.... Im glad the market is moving more towards end user changeable stators ect....really appreciate the video and that will help the end user dial in their combos by not having to send it in, in fact if your younger you can have one for race season and one for off season...... Keep up the videos but dont limit yourself you CAN much CLOSER to the best of both worlds with modern converters, trans and control system......I literally called that entire project cake and eat it too, down to gapless top rings ( damn ring pack was $400 pre biden dollars so what 600 now lol )....

[@PeggyParrow]

You are the first person to show the opening ramp on paper, on the correct side of the cam !

[@kevinmaxwell6610]

I don't hear much about stall speed anymore, i remember how popular it was in 1984. It felt like i added a hundred more horses. I think it was 2500 stall but we didn't dyno or have every guage working. Im kinda glad and jealous to see things aren't done like that anymore. One thing i vividly remember was driving down the street, and every driveway or every other driveway had a car jacked up with tools rattling under it. Everyone was a mechanic back then, and we had to physically hunt for information by showing up anywhere cars starting gathering. I learned mechanics from dad but had to hunt horsepower information because i am positive my grandpa and dads generation absolutely limited our horsepower because they were driving before seat belts, air bags,and crush points. Grandpa and Dad could put enough hp into a ceiling fan that it would lift the house, but they were intentionally dear in headlights when asked for modification information. I don't modify anymore because today's stock hp impresses the hell out of me😮

[@PerformaBuiltTransmissions]

That was a time to be alive. To hunt real info. Now we all have youtube lol. Yes stall changes are the real key to a good engine / trans combo

[@normanmayle5931]

Best ever explanation and application I have seen period.! Very clear and through !!! THANK YOU....!!!!

[@leoamaya1818]

Thank you for sharing & breaking it down for us. I’m at the point in life where I now need a transmission rebuild for my 94 Chevy impala SS. I’m obsessed with learning about a critical part to our cars. Jus subscribed 🇺🇸

[@barrykilts4506]

Thank you,this was most of what I was looking for.I’ve been all over you/tube looking but they all act like this is a state secret.I would cation anyone shopping for converters/advise to make sure they listen to you,I had a big co.build one and didn’t come close bc they didn’t listen.good stuff,thanks,oh I was busy with something else the first time thru and missed it,for me

[@PerformaBuiltTransmissions]

It no biggie, its a long video with a lot of info. glad it helped you.

[@herbertlambert9775]

Thank you and appreciate your return response

[@lawrencesportello1080]

Thanks for your time. Shitload of solid information in here. You're hard on yourself. I like that. 👍Good stuff.

[@Chris-bn1bn]

Some manufactures put very little information, like your diagram, like Comp Cams. I don't have the vaugest idea why that company is doing so well with lobes that can vary up to 10% from one lobe to the next. Howards, Erson, & others have a higher quality product. Some people buy a project ,all ready in progress. I get your frustration, it makes you job much harder. You can't blame people for using terms that they hear regularly on KZbin & other articles. Thanks, you helped me see this subject from a different perspective,& easier to follow.

[@PerformaBuiltTransmissions]

Mostly i need just a few easy number like rearend and tires for example and more than not most dont even know that. Thats truely where my frustration comes from.

[@brianwick3826]

383 stroker in a C3 Corvette with th400 and 336 rear end with short tires (26.5" diameter). 100% street car. Had a 2600 stall and it was hard to get used to. Too much revs and noise at a stop light before going anywhere. Swapped to a 2200 and much happier.

[@davidwoods8982]

Great video! Good for you for putting people straight!

[@r1ddl324]

That was a perfect video, the right amount of information. Love your work and keep it up.

[@PerformaBuiltTransmissions]

Much appreciated!

[@v8tergt653]

Street stall at 2k range? Had a fbody with a 4l80 and bolt on ls1 and I went for a 5000 hard hit torque converter and I got the biggest trans cooler I could find and it was the best tc for street Ive ever experienced and Ive done a bunch of them different setups. The car actually did a wheelie at the track and was stupid fun on the street and super manageable for cruising and non wot driving

[@my87z28]

Good video man. Last year we were building my wife's cruiser. We called you guys, spoke with Alan, I believe. Her car is a '63 Chevy II, 10.8:1 383, AFR 195 cnc heads, dual plane intake, Holley Stealth Sniper, 241/247 @ .050", .583/.565", 112lsa, 108cl hyd roller cam, 27" tires with a 3.89 rear gear. I'd guess curb weight is around 2900lbs. You guys built us a stg2 4L60, which we went through you guys to get a FTI 9.5" 2800-3000 stall converter. We ended up using USShift quick4 controller and have stuck with their 6000rpm wot shift programmed tune. It ended up making 386rwhp/369rwtq. It runs great for being a quick little street cruiser.

[@davidstoneking5768]

This is all excellent information, thank you for putting this together! I'm a huge nerd for all the automotive math and specifications, but I gotta say the best piece of advice in the whole video... Pick up the phone and call. Have a real conversation. Thank you sir!

[@deerslayer5863]

On side note i read every bit instructions i got with my transmission all went great still doing great 2 years later

[@PerformaBuiltTransmissions]

Thats awesome to hear! Keep taking care of it, keeping it cool, and servicing it right and you will have many years to come!

[@deerslayer5863]

@@PerformaBuiltTransmissions do my best to best 700r4 ive ever owned

[@manchild1219]

Appreciate this video you answered all my questions brought everything home

[@mattmeyers81]

Awsome video and great info. I guessed and hunted for a used stall for my foxbody. I think i got lucky bc it does great for what it is. I wanted a 2400 but found a deal on a 3500 non lockup so i bought it and put it in. Glad i did. In my 3550# with me in it foxbody convertible it went from running 9.20s in the 1/8 mile to 8.33 at only 240/265 to the wheels.. im thinking it may change tho once i bolt on this old sc and run 6# boost to it..

[@PerformaBuiltTransmissions]

3500 is meant for the strip like your using it for because the torque curve is stretched out over the powerband. The issue is people think they need a 3500 for everyday street use with a near stock vehicle with heads and cam.

[@mattmeyers81]

@@PerformaBuiltTransmissions I daily drive mine in the summer but I can see where most wouldn't want to. When I first put it in I was running the stock cam and the party was over real fast..

[@deerslayer5863]

Good to see you back on utube

[@Selcouth22]

Thank you! Amazing video! Currently planning a 408 build on a lq4, with a stage 2 Brian Tooley Torque Cam with the 4l80e in my 5500 lb 2006 1500HD Chevy Silverado. This video has done wonders in helping me figure this out. We are probably looking for that 450-500 trq range but won't actually know till it's dyno long after everything is in. Probably gonna go with a 2200-2400 or 2400-2600 stall speed.

[@carbonharmonics]

Subbed, as a mechanic, your ability to convey the correct information regarding torque converters is on point. Well done.

[@slackonthego1489]

Great Video! Have a 83 C10 getting LS Swapped with the FTI 3000 stall torque converter hope to have it back by C10 at the Brazos in Waco TX

[@PerformaBuiltTransmissions]

Make sure you tune for that stall speed. And im not talking shift points.

[@manchild1219]

Thank you for giving a F about us much appreciated this is my second time watching this!

[@hwnwhaler1]

Mahalo! Excellent explanation.

[@schussler07]

So I’m one of those ocd people that blue prints everything as I build it. Lots of math. Curious to see the rest of the calculations to get it all right.

[@GTOLONNY]

6.0 block, LS3 heads , lsx 102 FAST intake manifold, 102 NW drive by wire throttle body, cam spec 239/251 624/624 113+2, i have a yank 3600 stall in a stock 4L65E. I am looking to rebuild or purchase a new transmission for my 2005 GTO. My transmission is failing. It is driveable but when i start making power it slips . I can casually drive it but whats the fun in that . Im looking tonrebuild or replace. It is a street/strip car . Awesome videos wish i saw these back in the day when i was building my car !

[@GTOLONNY]

Also have a trans cooler cant remember if it 30000 btu or bigger

[@PerformaBuiltTransmissions]

Give us a call at 888-744-6542 to spec out a rebuild

[@scenicrides5951]

Great Vid. Lots of awesome info but does my on road and trail riding CJ7 5.3L need to worry about single disk or triple disk?

[@PerformaBuiltTransmissions]

If your over 800hp or locking it up in other gears other than 4th and cruising, then you will need a triple disc. A single will handle 5 to 800 cruising 4th OD and Lockup.

[@coburnjames1376]

At 11:00 in the morning I heard grab a beer so I did it's cracked

[@Alan-u7y9t]

When Back Tire Spins That Is The Stall Speed / Using The Tac

[@rickyfulks6656]

Overlap can b different between identical LSA specs

[@PerformaBuiltTransmissions]

Its a gist. Its to help people have a general understanding

[@jesseduke694]

I have never seen a commercial or a add thst shows a muscle car in a gravel driveway, idling, & spinning the tires with every lug of the engine? Did you make that up?😂

[@PerformaBuiltTransmissions]

I dont know how long youve been at this but it was on speed channel when i was a teenager. I do plan on simplifing this topic in a future video so if i can find it, ill throw it in there.

[@lylegoodluck]

I need to give you guys a call

[@dannyoaks85]

I think im getting the hang of it after watching this video. Im rocking a ls1 5.7 with 243 heads, ls6 intake, headers 231/242 in/ex cam in a 3600lb (est) camaro with 3.73 gears on 26" tires. I do not have a dyno graph of the car yet because its not fully assembled yet, but should be around 450hp/tq. This will be 100% a street car. When doing the K factor, do we use crank or wheel torque? I'm still a bit confused about k factor. Are we trying to match k factor to our duration or something? I don't quite understand just throwing a stall rpm into the equation. Where does that number come from

[@gk5891]

You have to know two of the three. K-Factor, torque at flywheel as installed or stall speed to calculate. The OEM Mopar 10.75" Hi Stall Converter that came in performance applications was K-Factor 140 426 Hemi Rated Gross 490 lb-ft Net Estimate (80%) - 392 lb 19.8 x 140 = 2,772 rpm Claimed 2800 stall 383 Commando / Magnum Rated Gross 425 lb-ft Net Estimate (80%) 340 lb-ft 18.4 x 140 = 2576 rpm Claimed 2600 rpm stall. 273 Commando Rated Gross 280 lb-ft Net Estimate (80%) - 224 lb-ft 15 x 140 = 2100 rpm Claimed Stall 2100 rpm Internally they were the same converter. They also had a K-Factor 115 version of this converter they used in some of the 2 barrel engines.

[@chimpfoos65]

This guy is so smart he can't help but talk down to all the rest of the world or is he really that smart are just a smart you know what

[@PerformaBuiltTransmissions]

People tell me im an asshole alot. Sorry you get that impression as well.

[@chimpfoos65]

I watch and enjoy your show man I have watched you for years now I was just having a little fun with you today you never bother me on the real side of things and I do appreciate the reply

[@aaronnavarro6083]

Este video es oro puro, vale la pena revisarlo una y otra vez para medio entender jeje almenos para aquellos q somos novatos como yo. Saludos!! Me encantaria saber qué convertidor usar para mi pontiac grand prix supercargado..

[@TheTowTruckGuy24]

CHOP CHOP I love it... also I've made this mistake too so I'm part of the problem

[@chrishansen7004]

I’m looking to ls swap a ranger with a with a 6.0 and a 4L80 with a 222/232 112lsa cam and 29 inch tires, ideally I’d like to run 4.56’s or 4.88’s to make up for the long 4L80 gears and a gear vendors to bring the highway rpm’s back down and split gears, would something like a 2600 stall be optimal for this situation?

[@PerformaBuiltTransmissions]

It wouldnt be ideal for racing but for light street driving and towing it would be fine

[@tonyamatucci1999]

I’m changing from a th400 to a 2004r in my C3. I have a 3000 stall in it now. I like it but wondering if I should bump it up a bit for the 200. Like 3400. Street/strip .486/.500 cam, 107 LSA, 243/257 duration @.050, 4”hg, in drive,3.70 gears, 28” tires, 3” exhaust around 350 hp 31-3200 lbs

[@PerformaBuiltTransmissions]

Changing the trans isnt going to affect your stall spd. The engine, rear, and tires are what affects your stall spd.

[@Meche697]

Great video. A video with all the math? Would be appreciated. This starts to explain the magical converter...

[@PerformaBuiltTransmissions]

That is all the math any customer needs to figure a stall speed out? The numbers will vary with your setup. That is a sample scenerio only. Once the baseline through this equation is figured you have to use experience as there is no dead set scenerio or first try math. It doesnt exist.

[@Meche697]

@@PerformaBuiltTransmissions K is the math...how does one factor in weight, gearing, tires, etc. Is it all experience? For us normal Joe's, we'd like to get close based on all the factors you discussed. BTW, This was a phenomenal video and the only one I've found that discusses all the factors.

[@PerformaBuiltTransmissions]

Yes experience and its covered. Weight ties in when i mentioned rolling resistance in torque converter operation in the beginning and near end. Ratio is also going to come into play on how effective the vehicle reaches its stall speed from a stop into the powerband. I understand they are subtly mentioned and its alot of information. Thank you very much though! I will be doing a gearing video on final drives so i can be more indepth with it then for everyone

[@PartialRug]

​@PerformaBuiltTransmissions I was also wondering how you got K in the equation. You just stated that K is 3000 rpm but I don't understand how you got there. To someone like me who is trying to learn it just doesn't really make sense and feels like I'm coming in halfway through the equation.

[@Meche697]

@@PerformaBuiltTransmissions Torque converters are the last of the magical boxes. Us normals don't have the resources to pick, try, re-purchase. Not to mention the labor, garage space, tools to do this every weekend till we can get it right. Catching up on your videos .

[@TMZ108CHUY]

What would be the best application for a 94 gmc c1500 extra cab with 4L60e transmission , stock 350 engine , 425 gear ratio , 4” suspension lift and 35”x20” tires and rims , it’s my daily driver and I tow construction material with it , I looking for smooth ride in the highway at I tow , please help?

[@PerformaBuiltTransmissions]

Heavy hauler 4l60e available at www.performabuilt.com

[@barrykilts4506]

So what is the actual on paper formula,can you give us that?

[@PerformaBuiltTransmissions]

Its called the Kfactor and its at 21:30 spelled out right there in black and white

[@trailerparkcryptoking5213]

Do you have a 700R4 that will live behind a BBC torquey street engine? Have a TH400 currently in my 1972 C10 with 3.73 gears and is revving 3000+ RPM on the freeway at 70 mph. Really would like an OD for mpg’s and less revs.

[@PerformaBuiltTransmissions]

700 isnt my first choice for an update and requires an exact tv cable setup at all times but yes we are able to build that. Please calls sales during buisness hours to spec one out or visit www.performabuilt.com to veiw our products

[@andy3590]

Quick question. I know you need more info. I have a 2700 stall which should be streetable in and just took it out today. It's a jegs brand and it would not really move without a lot of rpms. Could barely make it through a intersection driving it normal. Could it be a bad converter or just totally wrong? If you floor it it goes. Thanks

[@PerformaBuiltTransmissions]

You have a bad converter or something else wrong. Advice i would never ever ever buy any converter through a big outlet like summit and jegs brand. They just aren't good and the bottom of the barrel for even oem function. Pick a reputable company like fti or circle d for a solid build.

[@rogerpaulll1451]

great video

[@baims8367]

#3050 Hobby stock 1:82 powerglide 500/500Lift 232/232Duration 108LSA. 2500-6800 rpm Range 3/8 tight asphalt circle track. What stall you recommend?? 3:73 rear gear 678 final drive

[@PerformaBuiltTransmissions]

Thats great information and your well prepared! You have every number you need to sit down with some paper and plug them all into the K factor equation for a base stall speed! Then actual flash stall speed! You got this yourself! 🙌😃

[@greghearn7814]

well done

[@Jason-kn3tw]

Does line pressure affect stall speed or flash stall ? Have you done any videos on dumb valves ?

[@PerformaBuiltTransmissions]

Very little effect and usually not enough to make a change. But it can ever so slightly. We require stock line pressure in all of our builds. I dont have a video on dumps but there are many out there on YT

[@herbertlambert9775]

Hi, I have a 2800 Lbs vehicle with a powerglide trans Sbc 383 stroker Hyd Roller Comp cam 2200 to 6000 RPM Range Duration 230/236 Lift 582/591 Slick diameter 31” x16.5 4.11 gear I currently have a B&M 2500 stall converter in the vehicle that sucks from the standstill at full throttle I will appreciate any recommendations that you can suggest regarding a stall speed that would accommodate my application if you sell converters, I can make a purchase from you and forward you any additional specs that you might need

[@PerformaBuiltTransmissions]

2800-3000 stall, dont use b&m or tci. Pick a reputable converter lile fti or circle d and you will feel the difference

[@Builtnotbought442]

Man I believe that my set up is all wrong from tire size to rear gears and stall Could I call you to get some info maybe you can give me some input on what I am doing wrong ..?

[@PerformaBuiltTransmissions]

Simple. Build your car for 1 purpose and not everything. Its all about optimizing what your building it for. If you want the car to do street and strip then the car isnt going to be optimal for either one and might not feel the greatest.

[@Builtnotbought442]

I literally only want to do major burnouts on big rims is it possible to much stall Can keep me from doing a burnout …??

[@PerformaBuiltTransmissions]

@@Builtnotbought442 yes because higher stalls are for drag racing to maximize power down the track. Street/ burnout stalls are much lower to give more bottom end torque. You should still be able to do a burnout with a higher stall spd unless your stall is completely wrong for your setup or you dont have enough power / bad technique to do a burnout.

[@Poncho758]

Could’ve done whole thing in 5 minutes. What he needs is another Tattoo

[@PerformaBuiltTransmissions]

Got another couple planned. Its so cool you can do it in 5 minutes, me too !

[@idoewannautewno]

Lol

[@bowhite1293]

My personal daily driver car I run no less than 5000rpm stall. Not everyone is like me and I'm not like everyone else. My engines are on the aggressive side that some say arent daily driveabile. I'll never go with anything other than an 8" stall converter. Its what i like and what I have found to meet my wants and needs. 😜

[@darinr9424]

Weight. Torque and gearing

[@PerformaBuiltTransmissions]

Exactly!

[@jamesduffus4455]

4000 rpm at 1800 lbs had me laughing hard i would have asked him are you planning on running a 5th wheel and 53' trailer or you just want to be able to cook sandwich's while your in between trips LOL. street and strip guys that like to win have a set of wheels and converter for the street and a set for the strip i have a 71 skylark it takes me 1.5 hrs to swap a converter its a 3000 lb car and i care about my engine Buick's are expensive engines so i keep my rpm and engine load as low as possible on the street my trans runs 180 max even doing burnouts and even with the bigger wheels i only go up 600-800 rpm on stall. NOS is what comes out of my butt after eating empanadas LOL.

[@fastboyguero554]

What’s a good stall for single cab truck with 5.3 & 212/218 .550/.550 112 LSA

[@PerformaBuiltTransmissions]

Need way more information than that and i recommend consulting the converter company of your choice for the best results.

[@proweldllc4153]

Just letting you know gary robinson is cause deformation of character for ypur company. I can twll by what the disassembly he put in his video that someone had been in it since it was purchased from you. His names gary robinson take a look.

[@RocketCityTech]

Lotta armchair haters in comments with zero videos of their own…

[@TheJeffe613]

⚡️👍🏼

[@billionllc]

"Chop chop" ?

[@PerformaBuiltTransmissions]

Big Cam Slang

[@s.v.gadder1443]

You don't need to, you need to match your stall with your cam and gears to be in the power when you leave..... 🤦🤦🤦 It's not at all miss understood

[@PerformaBuiltTransmissions]

Bet your one of those ASE gobblers thats been hoppin coke cans too. Check out our facebook and insta for real performance if you wanna climb out from under that rock. Just another idiot in my comments

[@RabidMooseGarage]

Mild Cam? What a joke. Use the proper 1/4 race, 1/2 race and 3/4 race cam

[@AraceaeFanatics]

Everyone knows cams are measured in stages. Lol, them stage 3 cams.

[@HouliganIndustries]

😂😂😂

[@gk5891]

Stock (ZL1) = 0.580 Int Pro Stock = 1.200 Int Mild = 1/4 Race = 0.725 Lift Thanks for the advice.😂

[@s.v.gadder1443]

We're way past those old cams there are way better grinds out there today

[@EddieFoster-e9c]

No such thing as 1/4 race cam 1/2 race cam 3/4 race cam

[@PerformaBuiltTransmissions]

I agree but try telling all the boomers that. Ive given up lol

[@s.v.gadder1443]

And wrong not all converters are simple blocks of metal, some have electrical lock ups, some have fluid lock ups 🤦 I'm not even gonna finish this

[@PerformaBuiltTransmissions]

This video is related to gm transmissions mainly for 4 speeds. Your attention span is really sad.

[@jesseminter9594]

Blah blah blah wrap it up. I'm starting to forget the important s#!÷ that I thought I learned?

[@PerformaBuiltTransmissions]

Maybe work on that attention span...

[@irenepiero4087]

@@PerformaBuiltTransmissions lol

[@apethings7671]

Dam man! We know we don't know get to the point

[@PerformaBuiltTransmissions]

Cool fact, There is little line at the bottom of the video you can use to skip ahead to watch the math and calculations.

[@rickyfulks6656]

Calling a person's town PODUNK ,not cool

[@PerformaBuiltTransmissions]

I live in a podunk town lol. 4 digit population

[@crossedrifle247]

Write a script and straighten your hat. Until then, you wont be taken serious. Lots of good info, poor presentation.

[@PerformaBuiltTransmissions]

I get one guy like you every month or so. Ill stick with what the masses say. My reputation is anything but not serious lmao. Check us out literally everywhere

[@crossedrifle247]

@@PerformaBuiltTransmissions ….. the masses say straighten your hat and write a script, look at any successful motorhead on KZbin. They’ve all got one thing in common, the presentation of their knowledge, theres no stumbling over words or drunk fratboy hats. If 17k is satisfactory, carry on. If ya want more, clean yourself up a bit. Good info, poor presentation. You could be up there with Stacy David(361k subs ie masses). Nothin but love bud.

[@PerformaBuiltTransmissions]

Didnt start this to get rich or famous. I have a good life and a good buisness and thats enough. I refuse to be corporate and fake like the rest that dont tell it how it really is. The "professional" look never meant anyone is really a professional... and that is reflecting in the transmission world especially today. I say that with love as well. The purpose of this youtube is to teach and bring awareness as well as make my job a little easier and that is purely all. I find it fun and enjoyable by no means will my youtube ever be monotized or made into a career. I may get older but i promise i will never change and i know the way this industry is going down the tubes lately... you all may find you really appreciate how ive been all this time in the very near future.

[@finecrazygunz]

@@PerformaBuiltTransmissions theres always gotta be a child somewhere. This guy is acting as if your going for an interview or something 😂😂 i saw nothing wrong with it. Alot of good info i didnt know. Currently needing a converter for my cammed vette. Trans stopped shifting when it got hot after running it hard, let it cool down and been working good for days. I have no torque converter

[@zacharygray3442]

​@crossedrifle247 9months ago but damn way say I'm an old codger without saying I'm an old codger.

[@deerslayer5863]

Good to see you back on utube