Racing our Harbor Freight V Twin Dragster at the Track for the Final Time (without Boost)

We built this Harbor Freight 670cc dragster years ago in my parents garage. It always ran well at the track, but it was never very fast. Being that it was one of our first ground up builds, we built the frame heavier than what was necessary. In today's episode of CarsandCameras, we're reviving the mini drag rail, taking it to the track, and getting ready to install a turbocharger!
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[@Chris0]

THIS CHANNEL IS IN ITS PRIME. been watching for probably 5-6 years and it just keeps getting better and better. love all these builds and videos.

[@CarsandCameras]

That means a lot! We’ve been investing HUGE amounts of time and energy into the new shop, I’m really excited about getting this project boosted and more

[@jackmagnium6115]

@@CarsandCameras I suggest if you plan on going with a single turbo, get a 44 mm turbo and with twins, get a 30 mm mirror twin so its packaged better

[@jackmagnium6115]

@@CarsandCameras also engine position too. id suggest a longitudinal style and see how that works. your losing quite a bit of power through the multi stage chain drive. to keep things simple. get an automatic 3 or 4 speed

[@snjert8406]

Fully agree.

[@oldschoolman1444]

Ha Ha, their not tearing up John's dad yard anymore and have a real shop to work out of! =)

[@CarsandCameras]

I'll miss the naturally aspirated "thump thump" of the 670, but the turbo sound is gonna be sweet too!

[@funnerthanbefore4947]

Dude did u guys ever fix the twisted chassis from busco beach accident????

[@Rev-maniac7500]

Bringing back the classic 670

[@that_sicksix1719]

There's a guy on Facebook now making cdi kits with rev cut launch control that would be perfect for this project he makes them for 212 I'm sure if you get into contact with him he could make a 670 kit for you his name is Daniel

[@2koolchris291]

I am wanting to build my own but not with a go kart engine. Maybe snowmobile, maybe JetSki. Or just classic v8

[@crazyghostbeast]

I really want to see a turbo this this monster go-kart!!!

[@Deepanimosity]

Oh man, I remember the lawn mower flip. That was scary. So cool to see the engine back!

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@j.w.3345]

Building a nice small trail kart WITH my grandson. Having the best time! I'll almost be sad to see it done, but I'll be happy to watch him drive it! I got back into building because of you guys. Never knew I missed it so much!

[@gustav25897]

Also, real drag slicks "grow" on the big end, meaning as tire speed increases, centrifical force expands the effective diameter of the tire at the expense of width, effectively giving you a taller gear ratio as speed increases. Another thing, you might want to consider some form of actual driver actuated clutch, to allow for a higher rpm launch without sacrificing final drive gear ratio.

[@zachheindl8619]

Dropping a clutch may break stuff more than help

[@flhusa1]

If they have wrinkle wall slicks that size .carry the front wheels farther down the track .

[@AlienLivesMatter]

Stall up the converter on brakes or adjust it to grab quicker

[@tomsmith1857]

I agreed

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@brushybillroberts2654]

Great to see that thing down from the ceiling, and on the pavement where it belongs. Best sounding motor you guys have built. looking forward to the modifications.

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@Petethedeadboy]

I've been watching for a while now and I have to say this is definitely my favorite project you guys have done. Absolutely can't wait for the poweradders.

[@hunterchartrand6646]

Hyped to see the drag rail back on the strip! One thing however: you will need to somehow compensate for turbo lag, a short light burst of NO2 should do the trick, but without it your 60ft is gonna be pretty bad.

[@OwensGarage]

I was gonna say it needs a 2step but that would wipe out belts…..

[@jasonwhite8722]

Plus 1 a sneaky Pete 5-7 shot of nos will get it out the hole fast. And a pressure switch can be used to stop the nos when boost is made.

[@therealfatboy1116]

@@OwensGarage nice old trans brake would be amazing

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@CarsandCats]

I would try N2O.

[@sean6992]

Supercharge it (and keep the mailbox as a blower!)

[@xtremelimits640]

Was reading some of the comments and I agree you guys should switch up the tires in the rear. Definitely the gearing has to be changed. Methanol is a good way to go along with a turbocharger. Maybe next month you guys can come down to Wilmington for their Cars and Coffee. The first Saturday of every month. It's from 8:30 to 11:30. Hope to seeing you guys there. Hopefully you guys get to put on the fall Mini Mayhem

[@MrCrazyking81]

Wow it's amazing how far this channel has come! I am definitely a small engine Enthusiast with several go-karts of my own! Y'all keep on pushing the content out and I will keep on watching!

[@paulcooper2897]

To save a lot of balancing, etc ... build yourself a water loaded rolling road. Read Axle out of any rwd ... narrow as needed (or space rims inwards) ... use the input on the differential as the output to drive a shaft to a Boat Prop inside a container full of water. Thanks for sharing 🇨🇦

[@hankburton2043]

I love this dragster and can’t wait for the updates you have coming for this

[@dellstudio10]

Seems like a good 300’ drag racer. It would do well on dirt with the proper tire’s.

[@CarsandCameras]

Yeah, it’s 0-20 mph acceleration is really solid. From 20-top speed is where it falls off. Thankfully boost will help

[@lennym1273]

@@CarsandCameras Fuel injection will make turbo install so much easier...

[@kasuraga]

@@lennym1273 Yeah definitely needs EFI to make a reliable turbo setup. A draw through carb would work fine, but EFI is just so much easier to tune in the long run

[@joefacey4264]

I am a huge fan of turbos but for that setup a supercharger would be amazing instant boost as soon as you're on the throttle 😝

[@danieldykstra4885]

An AMR 500 would be perfect for this and have seen multiple builds do it

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@flhusa1]

Small nitrous system might get some better performance but would engine hold up with NOS and blower or turbo

[@buzz4633]

Yeah. I wonder how do they plan to handle anti-lag for the turbo? Slipping those belts so much could melt them. This is of why I think a supercharger would be better.

[@flhusa1]

@@buzz4633 wonder if anybody has a lockup or maybe delayed disengage?

[@adamj8576]

You had me scared when you said final time, but then things got a whole lot better lol

[@peterchristlieb]

Love watching you guys and want to see you succeed. At a minimum, you’ll need to open up the ring gaps before going forced induction.

[@izzyplusplusplus1004]

This☝

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@kodymayhew3104]

I'd throw a supercharger on it like red beard did. Keep with the drag rail theme

[@oldschoolsteve5116]

That’s what I was thinking

[@playinwithfirecustoms7954]

I was thinking the same thing...and Red Beard's sounded WICKED!!!

[@timothyhays1817]

Robot Cantina supercharged a predator 420.

[@AlienLivesMatter]

Doughnut media and grind hard co. $185 Eaton clone would be simpler than a turbo

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@taurincochran3398]

Charles's flatside looks so good in the background!

[@ryanbarrimore9703]

Yes!!! I’ve been saying to get this out in previous comments. Thanks for getting this out. Great to see it run.

[@jman145]

I recommend put some formula SAE tires in the rear to get more grip when adding that extra power. I know there are some brands out there.

[@garyhowe88]

Jr drag tyres/wheels probably be a better option, sidewalls are too hard on circuit tyres for drag.

[@allentoyokawa9068]

@@garyhowe88 tires*

[@esqueue]

@@allentoyokawa9068 Tires here in USA and some other places, Tyres is many other countries. Take a few seconds to research and be less ignorant.

[@garyhowe88]

@@allentoyokawa9068 tyres! You Americans are only borrowing and butchering the English language 🤣🤣

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@Ratkill9000]

Twin charge it! Supercharge and turbo charge

[@HateleyMotorsport]

The 670 rail project is the reason I subscribed to the channel years ago it’s great to see it back in action

[@jhawk1985]

Man that 670 sounds awesome 👍 Ive missed hearing that beast

[@lukelikens2057]

Man I Love that rail it's pretty awesome with the 670 on it but we need more power than it can even put out i would love to see a 600cc bike engine on it with a air shifter hell yeah brother

[@FukTheGovernment465]

It needed a sport bike engine from the start they would not be chasing for more power then...

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@corygilbert5666]

Man I dunno if the Ducarti or this sound better. I'd love to hear these in person, they both probably shake the shop windows.

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@ivyisle]

Drag rail was one of the first big projects I remember of yours, still a badass build, can't wait to see it full send

[@playinwithfirecustoms7954]

Its HELLA nice to see the 670 rail back in action!! I LOVE the lope, and I'm gonna be kinda sad when it goes away...but seeing what this little beast is capable of will put a smile back on my face!!!

[@mellender0]

should go supercharger instead. instant boost, unless ur going for a 2 step

[@AlienLivesMatter]

$189 Eaton clone for up to 2L displacement would be killer on +600cc

[@mattgraham1983]

You need to sort out loading up before you leave otherwise a turbo will be useless, sure you have a bigger top end but will take longer to get there 🤷‍♂️ I think you'd be better off supercharging.. definitely be interesting to see the 60ft with a turbo and without time(I think you can make a bulk load of time just there NA)

[@allensandven0]

NOS wet kit two bottles and methanol

[@ProbeGT2]

You're right, with the torque converter they won't be able to pre-spool the turbo when staged without burning the belt.

[@zachheindl8619]

The turbo for the 1L will help, being smaller.... Really depends on how much air the V-Twin can move and how big the exhaust housing on the turbo is.

[@zachheindl8619]

@@ProbeGT2 i wonder if some sort of belt lift-off device could be made with a pulley, or one that starts loose locks down into tension and make it work that way 🤔

[@FarmerFpv]

@@zachheindl8619 It will just burn belts when it engages.

[@anesthetized7053]

i cant wait to see the turbo kit! you guys are really stepping up the projects and once the shop is fully done its going to be even better!

[@micahgood5691]

Love the plans for the rail, can't wait!!

[@daltonengland7134]

Would love to see the 2 stroke 100 horsepower engine from the green go-kart on this thing I feel like it would rip so hard 🔥🥱💯 or even the Ducati engine and then add some slicks😍

[@jeffrykopis5468]

Definitely. This rail deserves at least 90hp. 100+ would be better!

[@untitled2792]

iirc they tried to put the ducati on it but it wouldn't fit

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@musicauthority3516]

That 670 sounds so good just like an actual drag car. and so much better than any other 670. I'm not sure why it must be the header that you have on it. but I don't think it will sound as good with a turbocharger on it. and I'm not huge fan of turbocharging because of turbo lag. and because they are hard on motor oil. in fact it's recommended that a person use oil specially designed for turbochargers. and if a person does it right they should use an intercooler. and plumbing it in can be a pain in the ass. but a belt driven supercharger would be the way to go.

[@WyFoster]

Methanol, you don't need an intercooler

[@brianhostak3961]

You guys rock !! Thank you for the video !!

[@dandavis7442]

I always love watching the drag rail, but I could listen to it for hours. Definitely the best sounding project to date!!!

[@rydplrs71]

I’d love to see you guys dyno some of these engines. I have never seen anyone add the listed horsepower of modifications be even remotely close to the actual results. My bet is that motor makes 30-35, and if you tune it on the dyno you might break 40 but not 45.

[@joegreene6250]

Using a 1/8 mile calculator and assuming 400 pound weight, I'm struggling to see even 25HP.

[@AgnotologyTV]

The drag rail is cool, but aren't the two cross karts faster? Love to see either of those beasts on 1/8th. The predator engine is the current hold up right? If the turbo doesn't so the trick.... I can't say it enough. Honda sabre or magna motor from the mid 80s. Shaft drive, v-4, 700cc is 70 hp, 1300 is 130 hp. 6 speed transmission.

[@nathanmorin4565]

I love the growth and new shop!! I’ve been away too long keep grinding guys!!

[@redeemedrigswheelingvideos8002]

Thanks guys! Love the videos you make!!!

[@dicktrickle4197]

Love it. love the idea of the run Dyno too

[@otix3253]

i love that the dragster is being used more! definitely one of my favorite projects !!

[@dennisjohns624]

So happy you guys are doing something with the dragster. Love this thing. Can't wait for the turbo build

[@Mountainpageproductions]

I love how ike hand built a Jr dragster and his favorite build is a rusty old wagon with a 5hp Briggs 🤣 and that's why we love ike

[@krakhedd]

Can't wait to see this thing finished!! If you want more boost - feed the turbo (good at compressing air) with a Roots blower compounded (very cheap and good at moving large volumes of air, very inefficient at compression though). Aftercool between them and rely upon the methanol for cooling at the combustion chamber

[@ghomerhust]

love seeing the rail back on the track! i bet with some proper gearing and a little boost, that will be 8s consistently even with ike in there weighing it down. for sure the prettiest thing you guys have built

[@BStrick1993]

I love the sound that unit puts out!

[@seantheberge5456]

Absolutely love the sound of that engine, you've sold me on it. And the sound of it going down the track...... sounds like Bonnevile! Old Turbo Guy...

[@oldsranch]

The red 65 cutlass in the staging lanes was originally built by a friend of mine from Iowa who passed away this year. Current owner is a great guy and runs the car regularly. Glad to see a reminder of Jeff still out making passes. Bittersweet indeed. and your rail? Spray it and send it!

[@heathroush5343]

The dragster is why I started watching. Looking forward to seeing it turboed.

[@JamesSmith-op7yc]

Have you ever thought about an eighth mile class for "home brewed" slingshots? Good work guys. Thanks for sharing.

[@richardmoreno5160]

Sweet! It doesn't matter the speed of the rail. I've watched you guys build that thing from the beginning and it's always been neat while bringing you all together with good content. 👍

[@smjhobbies4527]

Very awesome video you guys great editing awesome footage and that card really cool I love that we have time it's wicked

[@Patella72]

Without a doubt the best sounding project you've ever built!! That thing sounds so mean.

[@andrewskingsley4187]

Brilliant to see the drag rail back, getting better every time !

[@That_restoration_channel]

Best youtubers fs guys are the only reason why i build gokarts and mini bikes and stuff

[@dbfabworks5320]

HELL YEAH!!! love the content and the idea of some kind of "dyno" Ive seen people make DIY ones from a rear axle with wheels and tires on it and some kind of pinion brake to apply load. Keep it up!!

[@joebeeler8610]

I’m a mini bike guy, but I love the rail! I can’t wait to see more video content with it. Keep up the good work.

[@mikebruce6037]

LOVE That sound !!!!!

[@Deacon2071]

I just love the sound of that rail.

[@EvanWells07]

Glad to see the rail making a comeback. Always thought it was a cool build!

[@prancstaman]

love how it sounds!!

[@CrazyIvan1337]

So hyped to see the drag rail back in action!!! As I'm sure you know, there's gonna be a LOT of changes you'll need to make if you're going for boost. Obviously, it won't make a ton of boost, but in order to effectively make use of that forced induction, there's a few factors to consider. To start, fuel injection and adjustable ignition timing might be the safest route; it certainly worked with the turbo drift trike. I think you'll have too hard of a time getting carburetors to correctly meter enough fuel under boost with a twin cylinder engine, and getting the ignition timing right will be tricky without an ECU and independent ignition coils to handle it. Depending on how much boost you end up with, thicker head gaskets might also be on the table. A bigger fuel tank is a MUST, as well. You'll definitely need a wideband air/fuel ratio sensor and gauge to monitor engine performance. Different rear tires will help a lot too, especially if you spin.

[@Knee-ko]

5:11 - Love that Ike takes 'Gatorade' with him to keep hydrated during the shakedown. 🤣🤣👍👍

[@SadPuppySoup]

I been waiting for ever for the rail to hit the track again, there is so much more that she can do.

[@200shotramhemi4]

You guys have Great Ideas, and are making History!

[@michaelmiles933]

Love that wild v twin idle 👌

[@brotherputts3796]

Love the sound of that motor.

[@kiwicameraman]

Looking foward to the turbo, u guys keep getting better an better. S/o from New Zealand

[@masonandmepowerwheelsvids1690]

Glad to see this back. This engine is why I found you guys. Keep it up.

[@larrydavidson3402]

This is going to get more and more exciting as the tuning progresess. Looking forward to watching this evolve.

[@BustedKnucklesBuildsTexas]

Good run , thing sounds great !!

[@shawnsatterlee6035]

Damn that thing lopes! Sounds great boys!

[@Chris-cq5dy]

Can't wait to see what happens next great show

[@jamesmcgee9279]

Outstanding y'all! !

[@KevinZ061]

Man I’ve waited for this episode for YEARS! Thanks

[@bobmanzi7712]

great stuff guys thanks

[@frederickgiordiano2105]

That dragster sounds soooo cooool!!

[@TheBiggBert]

The rail videos are always bad ass 🔥

[@thedr309]

good job John on the light!

[@ZippoVarga]

You guys have been killing it for years. I remember your excitement when you hit 100K Subs. Look at you all now! It's also great to see the friendships endure throughout the years and adventures. Remembering the old riding mower y'all pulled out of the weeds, got running and hammered compared to now. Just wow. Y'all are the Mighty Car Mods of Go Carts and Mini Bikes. Here's to many more years of continued success! Now get over to Issac's channel and hit that Subscribe! Cheers guys! Zip~

[@articat568]

John doesn’t get enough credit for how much his editing continually grows, Watching this made me really think about what this channel was when I started watching in 2016. The quality is consistently getting better every video and has for the past 7 ish years. You boys have been inspiring as hell

[@richc9503]

I've been watching you since the beginning and the rail has always been my favorite, I'm glad you're bringing it back. I think you guys need to put a 750cc off the BMW on it and I also think John and Ike should build a real old school dragster! Love it!

[@tomstech4390]

"I think it's geared too low" CarsAndCameras every time, hence all the clutches having nightmares. ET comes from average speed meaning the more time at lower speeds hurts you more than a little bit more top speed helps at the very end of the pass. So getting up and out of the hole ALLOT faster and getting upto 100mph at the trap faster helps allot more than getting say 105mph at the traps where that extra 5mph was for only the last 10 feet but accelerating slower off the line and all the way up to to that point.

[@oldhillbillybuckkowalski]

Agreed. When testing how well changing anything is gonna work the 60 foot time is usually what tells you the most about how the car/bike liked the change you made.

[@ford_truck_garage]

My favorite build. It sounds so good!!

[@trippnbilly7130]

I could listen to it run all day. Bada#$!!!

[@csxrailfan02]

this was always one of my favorite projects to watch slowly being built from the ground up. cant wait to see more of it in the future especially with the turbo.

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@TexasSpeedManiac]

I freaking love that thing, and sounds amazing 🤘😎

[@patrick1675b]

That thing sounds so sick!

[@endgovernmentextremism]

I like how John starts the intro as an amputee.

[@Tmanstomp100]

OMG IM SO HAPPY THIS IS BACK, cant wait for the turbo

[@renrogers78]

Awesome 💯 vids you guys are doing, love your work and keep doing what you do. Peace out from Albany creek Queensland Australia 👍🏿😎🇦🇺

[@DetroitMicroSound]

Good to see the Mini V drag!

[@snjert8406]

Ooooh I can’t wait for the turbo!!

[@dalebourke2591]

About time the rail comes back By far my favourite build you guys have done

[@Hitycooking]

kzbin.info/www/bejne/gXaroaappLqcnaM

[@jeeper426]

still one of my favorite builds second only to the rat-rod wagon, this thing is awesome and just all kinds of old school cool

[@garystratton4125]

That dragster sounds great!

[@200mmonster4]

The rail has been my fav build up to date.

[@l.greenemachine66]

nice to see you brought the green monster out again. make that thing go as fast as all your other bikes and it would be awesome!

[@chopshopminibikes170]

Alot of hopes and dreams and 'duck tap! Love it! Send it!