670cc Dragster Dyno Day!

We take our vintage 670cc drag rail to a dynamometer, or "dyno" to see how much power and torque it makes at the wheels. A chassis dyno is used to measure power, torque, or force, and it differs from an engine dyno in that is measures the power and torque output at the wheels, after drivetrain loss, which in our case is the 780 torque converter, a jackshaft, and three chains.
We then put our 140cc 4 speed mini ATV on the dyno, and did a simulated 1/8th mile run. It was slow, but it was a ton of fun!
Thanks for Watching!
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[@1badk20]

Because of your dragster build, I have started on my own. Now, the heart of the build is my 421 Cheetah Cub 2-Cylinder 2-Stroke Yamaha Banshee Engine, which in my banshee on an ATV Dyno, made 88-rwhp on 91 Octane, and 102-rwhp on 100 Octane. I have just started on building the drag frame, I am super excited to see how this goes, especially with a 6-Speed 100 rwhp 2-Stroke Banshee Motor with a 12,000 rpm rev limiter haha.

[@JimCooper-f8g]

I have a 421 cub in a rz350. It's supposed to make about same #'s . Porting by Nate McCoy and shearer pipes

[@GioGuitarDude]

True and accurate readings, I’d be willing to bet that the dragster is pushin 40 HP and 50 ft-lbs to the wheels.

[@Lord_Verminaard]

That torque converter was fully variated way down low in the RPM range. It needs stiffer springs to let that engine get all the way up in the RPM's before it shifts.

[@ians1464]

Brendan Doyle I think so too and if the belt is slipping you want as much weight as you can put in it so it will pinch the belt tighter to. Plus make sure the distance is right or the belt won't fully engaged in the top end

[@SM-cg2dc]

I think the dragster is hands down your best build. It’s awesome! You’ve put a lot of work into that, be proud of what you’ve accomplished.

[@jclair4617]

I noticed a thump when you were accelerating the rail warming it up. Then again when on the Dino and you can see the drive pulley pinch the belt in the video, that seems to me like the driven pulley spring might be weak. Also if you lighten the weights and or get stronger springs in the drive pulley it will have a wider rpm range before the converter hits its top ratio ie, more time in the lower “gear”. I think a dyno measures acceleration over time to get the torque value so if you don’t floor it it will be inaccurate, too low. Just my 2 cents, loved the video and the build. Keep up the great work

[@agoogleuser7784]

Now either turbo or strap a Aisin amr300 supercharger to it and see what kind of power gains you can get!

[@user-im3dr8yo3o]

a google user supercharger

[@bgagaming7036]

That would be awesome if they put that supercharger on it

[@robburdack4361]

ive been saying a amr for the last 4 months .... they are cheap to and should hook up easy ....

[@agoogleuser7784]

rob burdack yeah man they are so stinking easy to fab up as a draw through set up I bet Ike could do it in an afternoon! Plus they are super cheap and easy to get on eBay! They are perfectly designed for that size engine.

[@blooiefps9304]

a google user yeah that would be amazing

[@CarsandCameras]

Honestly, the dragster was not super impressive. The ATV made up for it!

[@thatbuelldude189]

What's next for it And we need to put the original 670 on the Dyno to compare

[@MoparMattt]

CarsandCameras y'all can bring your toys here and ride sometime I'm in NC too I gotta old 3 wheeler here and a makeshift go kart we can play on

[@ryanharris018]

Time for a turbo?

[@BTF-pk5il]

Put the old miata engine in the dragster!!!!!!!!!

[@howthisfarmworks8817]

Buy pattle tires for dragster and take it to silver lake sand dunes

[@motomigsofficial]

They sell the little tachometer for these engines that wrap around the spark plug to read the rpm, maybe try and look into those so you can see how high up she’ll go and then once that’s figured out try and calculate everything now that you have a specific rpm that it’ll go to. They’re pretty cheap and I hear accurate too, on eBay you can get them or maybe ask if gopowersports has them

[@philiprowney]

You can work out a rough lb/ft of lost torque at the chain drive by spinning it with a battery drill and reducing the numbered clutch until it can't turn the back wheels when off the ground. Then [ here's the clever bit ] attached the chuck of the drill/driver to a torque wrench and turn it up until the drill can't make it click. Torque wrench figure/dyno figure = percentage of loss through gearbox. I don't think it will be more than 10%, it's like a straight cut box with few cogs. Great work. I laughed when the tutor didn't say it was 25 years since Isaac attended, hahahaha

[@michaeledwards8892]

Cars n cameras. That was one of my favorite episodes. The mini atv Dyno pull was awesome. Thanks for the laughs. Keep it up guys. Thanks, Mud Pimp

[@kevinunknown6457]

Keep improving the dragster, because I truly believe that that thing can get 50+ horsepower, maybe more with a turbo fitted to it. I know you guys are capable of such feats. Would be crazy to see any forced induction you come up with! that thing is a beast waiting to happen and has to be the one the sickest builds on a DIY dragster.

[@troycrowder9942]

all and all i am glad nothing went bad looks good all the way around cant wait to see more

[@dano4572]

you guys are pulling a DRAGSTER behind your truck!!!!!!!!!! that is SOOOO cool!!!!

[@73Bugman]

Love the idle on the rail. Still voting for nos. maybe a plenum/box between the carb and manifold. Way easier than a turbo with just as good on power. Lots of inexpensive kits for motorcycles

[@fergusonhr]

That is probably the coolest toy I have ever seen guys...

[@OverlandOne]

The dragster sounded great! Sounded to me like about 7,500-8,000 rpm. It was really turning.

[@danteverna4261]

I find it a really cool idea to put these kind of vehicles on a dyno, because I've never seen anybody do that before.

[@Collindoesdrifting]

John's reaction was priceless during the atv dyno run.

[@murmaider2]

Thats good numbers for whp considering all the chains. Props to powershifting that ATV like a boss.

[@christiancopher8356]

DEW IT FOR DALE! HELL YEAH BROTHER

[@MrJayArt]

Wrong channel...

[@wyattswasey2630]

Definitely proud to have been with these guys since day one

[@dustinsummey9371]

That is a bad to the bone badass play toy and love the way it sounds so good

[@203joeroganMCL]

Jons face on the dyno= one of the funniest things to see this February.

[@MegaEtown]

Why not put an 883 or 1200 harley engine in the drag rail and be done with it? It's awesome what you have done, but something like that needs a bigger engine

[@theupscriber65]

Or an S&S 125hp v-twin.

[@Ratkill9000]

Any motorcycle engine would be a huge upgrade over an industrial engine.

[@courtlandbroussard6900]

Agreed

[@thatmoparguy9837]

MegaEtown, ur idea accept with a smog pump blower

[@stoffes]

huabusa engine it needs with turbo

[@liamtobey2936]

I think moving to some sort of motorcycle v-twin would be smarter. Built in clutch, built in gear box, and probably more parts availability. Not to mention much more power..

[@stuie334]

Liam Tobey they aren’t gunna do that they like slow shit and wasting money

[@jimmieanderson8263]

dixie chopper motor

[@PTMOFF]

They've said it before, they wanted to see how much could be gotten out of a 670 because strapping a street bike engine on and going fast is too easy

[@ericthered9655]

Go Power Sports doesn't sell stuff for motorcycles.

[@michelebeck4311]

Being a kiwi i not really into Harleys but in this case i strongly believe a big Harley engine with efi is the way to go.

[@t2nate137]

I’ll watch this when I can, at school.

[@treyw3867]

T2NATE VIDEOS watching in school rn😂😂

[@plumber99]

One of your best episodes. Had a blast watching it!

[@budworx1639]

The mini 4 wheeler looked like a a blast. It would be cool if there was a multi gear transmission that could fit the predator motor. That would make it a blast!

[@haroldparker3487]

You all are awesome, dynoing those vehicles, who'd a thought.

[@davidgriggers5677]

Love the spunky 90' rap twang!!!! Sweet!!!

[@JohnWilliams-nx2no]

you guys are really nice and thorough with your explanation, make everybody feel welcome while still calling them out "dont believe these jackshafts work? come to the track and see for yourself!" you guys are too funny

[@Davebaker364]

That would beat a normal muscle car off the showroom floor back in the 60 to 80s! Wow dudes! Awesome awesome!👏😂👍👀

[@offtharadarrlowkey5781]

That’s a nice burban looks very well taken care of

[@ADN1996]

love the driving music. so much better than crap most people use.

[@cootersgarage4408]

I liked the Ben Jones banner on the wall. Cooter from the Dukes of Hazzard. 73 from TEXAS.

[@jasonpetrich4141]

Dude that was the most angry box of bees I seen on a dyno in a long time, I fell over laughing, still a great vid guys. Can't wait for another little atv for ike. And a race soon !!!!

[@ians1464]

Been waiting for this any video seeing that thing run. Make sure you got your torque converter adjusted to get all you can out of it. If the belt is slipping you need more weight. Stiffer Springs will allow the RPMs to get higher before it shifts make sure the belt is set at the right distance or it won't fully engage top end. Drop the battery and wires I bet that's 18 lb

[@johnc6466]

Dam, that thing looks amazing with that paint!

[@davesracingchannel9261]

Doug the type of guy to Would you please give my racing channel a Subscribe I have plenty of videos for you to enjoy

[@mistermechanic2257]

Great job! Rail paint job looks so cool. IDK horsepower on your predator but it sounds awesome! Maybe build a chopper with one in future?

[@theskunk6537]

Love the banner in the background with Cooter on it !!

[@SIXPACFISH]

You Nuts should find a motorcycle dino to test those things on. Very funny video! You hit this one out of the park! CRACK! It's Going! It's Going! IT'S OUTTA' HERE!

[@1959ECHO]

Ike, as much as i could i was looking at the jackshafts when you were on the dyno. Heres a suggestion, Gear it down just a touch on the intermediate shaft, let the motor squirrel out a bit, youll get faster launches and as long as the motor squirrels and doset come apart at the higher RPM, youll get the power to the ground and hopefully faster speed on the track

[@MartinScheuerJr]

The little fourwheeler was hilarious lol

[@waltbirchmeier2947]

The first couple pulls it sounded like it was falling on its face a bit down low but once it got up in the rpms it sounded pretty good..I wonder if maybe its a little bit lean down low..regardless its pretty damn sweet and would be solo much fun..

[@IngenTechNational]

12:53 Reminded me of the NASCAR restart!!

[@mikemorgan2642]

John's face on the first ATV pull 😂😂😂

[@jeremynading2006]

The looks on your faces had me rolling. Absolutely priceless.

[@72troy455]

Top Fuel Harley engine would be a killer addition.

[@joseoropeza1986]

You guys have the life. I just wanna be part of the crew.

[@ljsaldana4739]

You guys are choking the rev band with that intake. Switch it to a velocity stack!

[@jdrevenge]

Lj Saldana agreed, stack would be better.

[@pico67ss]

Did the torque converter ratios mess up the Dyno numbers

[@codys_crap_cars]

pico67ss I would assume so because it's a constant variable gear ratio based on rotating mass. Can't ever get the true 1:1 gear ratio

[@ZippoVarga]

The ATV was Sick. I was laughing my Arse off. Thanks for another awesome video guys! Zip~

[@fillg]

When the dragster was doing one of it's runs I noticed my right foot was planted firmly on the floor. I'm sitting on my living room sofa but in my head I was right there on the dyno. :)

[@jay7264]

This was one of my favorite videos i loved seeing the quad on the dyno

[@bgd73]

I learned something.. the torques are impressive. A test for convertor versus gears is both the dragster and atv lined up in the eight.. torques are the same. I had learned of weirdness with self balanced boxers and first year vortecs.. they contonued to read the same hp as factory after builds. Street times proved the only thing that proved gains.

[@ziptiejedi5658]

Super pumped to see the shifter kart build. Ive been hoping you guys would build one since the rat rod wagon build.

[@trav_thesav_]

Loved the old school Compton type beat.

[@gokartsminibikesandmore9925]

Can not get over how it sounds

[@brettm910]

That was awesome! that dragster sounded good I don’t know how you could get an accurate number with a Torque converter the four wheeler maid my day.

[@robertmaks0]

Go with a 600 ninja. That would be amazing to see. Just any high power motorcycle engine preferably high revs.

[@dave3883]

Best video yet. I laughed so hard at the ATV dyno. On a serious note, it sounds like the drag's ignition is breaking up? It could definitely be tuned I THINK. Just judging from the sound when you first romped on it. I do love how it sounds up top.

[@longdong3889]

Probably has no advance

[@theupscriber65]

Easier to load it backward and lift the front end. And is the jackshaft perpendicular to the axle both horizonally and vertically? If not it could help throw the chain.

[@TheVintageEngineer]

Need some more tuning in the torque converter. Don’t know what the load of the dyno is but it appears the torque converter is shifting way to quick. That is why you peak numbers are so low in the rpm range.

[@flavxer7345]

I was waiting on the boom on the atv, but she held together. It looked to me like the primary chain is still hitting the torque converter at high speeds a bit.... wonder if you could make a guard to go down in there to help that.....

[@EverydayLayman]

That green arrow on wheels is nasty!

[@DeliciousDeBlair]

Waiting on the blower. If I had one to spare [sorry, only have one and its for my planned project] I would give you a roots blower. I know where you might could buy a bit larger one than mine for probably pretty cheap up in Minnesota if my friend still has it.

[@alexllena7769]

Yeaaaa man, his sound it is the best.

[@K_M_M_G]

Guessing the jack shafts are losing < 5hp but it is also dependent on RPM. Guessing if you remove the torque converter and add a chain you'll get more correct numbers ('clutch'). Owning a Dynojet and Land & Sea dyno myself RPM pick-up was not needed to calculate horsepower but is needed to calculate torque from horsepower. Horsepower can be calculated with out RPM by measuring the time to accelerate a fixed mass (inertia in the Dyno's case).

[@amazingthingsforsaleonthei6793]

You know I have built a few hypo mini bike motors and the way to get a lot of power is to put an oversized carb on the engine. With this one you might get away with two carbs one for each cylinder, not to big though, and with this insane ride, just to get a quick amount of power, pump some laffing gas(NOS) into the intakes to get a 6 or a 7 at the track. Use NGK they are the best.

[@stevemitchem6041]

Nice frame work. For any future builds, thought you guys would like to know that Taylor Dunn made a 3 wheeled electric cart called a stock chaser, not sure of the model number but they all used a ford 9” differential with shortened axles. Just food for thought

[@propaneandpropaneaccessori3446]

I love that suburban!!!!

[@isaacitllbefine7231]

thanks

[@Eric-x4v3i]

Squares for life!

[@TrojanHorse1959]

John, Isaac, I think you are losing far more through the torque converter than you are through the jackshafts. I've seen a couple of videos where they reconfigured a motorcycle engine/gearbox/clutch to where they could use just the gearbox/clutch for another engine. Something like that to where you could use one chain to drive the rear tires and get rid of the torque converter would greatly benefit the dragster IMO. Plus because GEARS ya' know! Also, I noticed a strange "bobble/movement" of the rear tires on the dragster, any idea what's happening there?

[@nashguy207]

I agree the dyno will not give you accurate reading on the dragster or the 4 wheeler the way the dyno is setup' I agree that the jack shaft is not creating a lot of drag Its a shame there's not a small engine dyno around you to see what the 670 is really making. But a good attempt for sure and it definitely looked like the torque converter didn't like the dyno I saw the sparks. LOL Great video guys!!!

[@morrelljw]

This thing just oozes cool!

[@NSXTACY420]

Great Episode guys!

[@jeep2003]

the boosted boiz did it with their kart and seemed pretty acurate. but the torque converter probably screws with it the most

[@watahyahknow]

think if you take one front seat out of the suburban and one side of the rearbenches you can prolly load the dragster in there AND close the doors , only downside that any passenger is sitting behind the driver as for the engine rpm : if you go for efi you need a crank trigger anyway , that should give an acurate rpm reading at the crank , you prolly can use a cheap smartphone as a dashboard and maibe even record the run with some basic data like end rpm . lamba , might even be able tp record the endspeed using gps

[@BlackMetalRC85]

the Dragster had 25 HorsePower on the Wheel? and the Engine alone?

[@Wooley689]

Dirt bike swing arm tensioner needed. Damn. The paint looks great though. Belt slippage on the convertor. See if you can find and old EZGO golf kart and scarf the CVT off of it. More beefy.

[@JudsonGraham]

Thst engine sounds great! Wish my lawnmower had thst kind of tone lol

[@crowofjudgement159]

man ya'll's faces when on the dyno is priceless

[@hugoagogo2156]

You guys are money!! $10,000 gocart. Awesome!!

[@propaneandpropaneaccessori3446]

Time to ditch the predator engines guys. You guys have surpassed that point now. Gotta work with big motors!

[@overyonderjustapiece]

Propane and propane accessories they haven’t even got to a turbo or nitrous install yet. Just chill already!!

[@reedbautista7405]

Ed H They have a turbo drift trike.

[@22swagnificent]

I was gunna say nitrous till it blows. And then do like a ninja 750 engine

[@jyoung_official]

Just add a 2 stroke engine

[@Ratkill9000]

Well if someone has a GSXR or 'Busa laying around to donate. Just hope they don't murder themselves with so much speed.

[@SWhite-hp5xq]

So how much hp to tyre loss was from the belt slipping on the torque converter do you think?

[@cory0702]

Do you guys have plans for the dragster, I have a 1100 cc Suzuki motor I would love to fit in that chasis. I would be happy to purchase the plans. Thanks Sid

[@blakestevensoutdoors5093]

You guys need to do like a Harley Davidson motor swap like an evo 80inch with gear box and belt drive now that would be awesome

[@zeemanjr]

It would be awesome if you guys added a motorbike gearbox say an after market harley 5 or 6 speed box then you would have somethin. Still cool non the less.

[@ghaffarsultan7943]

Looks real nice you guys should make a f1 style next with 600cc sport bike motor . You guys make it look easy ! . This one is nice wish I could drive it .

[@metalworksmachineshop]

You need to swap the TC for a clutch . Bottom end will be a bit slower but the top end will gain mph. But I doubt it'll run a faster time.

[@mealex303]

Is their any kind of better belts that you can use made of leather?

[@bv9612]

Looks and sounds great 👌👍

[@nathanb859]

KillinIt how could you watch a 15+ minute video if it just came out 5 min ago

[@bv9612]

Tux previous videos. Imma watch this video later.

[@garrettjohnstone7229]

Have you considered a clutch/chaincase setup from a snowmobile? They utilize a primary and secondary clutch like the torque converter you have but with much more adjustability even with stock parts. You should look into it, maybe from a 600cc skidoo, MY2004 or so. :)

[@oikkuoek]

That torque converter was slipping badly on the dragster. It might have some alignment issues.. It slipped from the engine side on the primary axle when Ike was doing a pull. My guess is that the secondary axle is too far out on the left, or the belt just isn't tight enough.

[@ghettoflyer]

You mite want to see if you can get the drag rails wheels and tires balanced. I think it would shake alot less.

[@BigblackRN84]

Hey man I had no idea you guys were local to me. I actually attend BCCC. Looking to do a part project for my girls this summer. Great job on the rail!

[@88seanster]

Build a clutch shield that covers that torque converter and secondary clutch, I drag race sleds for fun,trust me,one day you'll get a face full of metal without that shield.

[@AlphaNerd132]

only 22hp?! That drag engine is just an awsome alarm clock!

[@jnljnl8485]

Can you upgrade the cvt to engage and go trough the gearing in the rpm range your camed engine works the best at? Hotseat specialised in the 2 smoke Polaris atvs back when the 400 was the fastest 4x4 quad. They may be able to help.

[@jdmjedi777]

Guys check out 2 stroke stuffing! He shows how to make a small engine dyno for mopeds and scooters that seems to work GREAT! He shows how to build it and sells the unit you need to run it. I'm sure it can be made to work with go karts. Seriously you guys can build your own dyno to have and test everything you build without even having to leave the house.