Turbo 670 Dragster SMASHES PERSONAL BEST with a 90+ MPH Pass!

Our Predator 670cc v twin powered dragster runs its fastest time ever at the drag strip! N/A, this modified high performance 670cc v twin ran a 9.92 in the 1/8th mile, and today with the turbo, nitro methanol fuel, and RZR transmission we ran a 7.89 at 91 MPH! We still need more fuel flow and some stall speed in our transmission before we can crank up the boost, but this test 'n tune was very promising!
Thanks for Watching!
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[@theaccidentalhomesteader3246]

I am an old man, my boys and I did go karts and mini bikes until they grew up and went out and are doing life. I appreciate your channel so much because I just don’t have the energy, time or money to spend. I am living vicariously through your channel. THANK YOU!!! BRAVO ZULU!

[@tslim250]

alot of guys get to live the scene through the boys, its great. i'm still young enough to do some stuff but work and life get in the way alot. i'm so thankful to see what these guys dream up and get to be somewhat of a part of it.

[@martinlicht1969]

Right there with you! Built my last bike at 60 years old

[@frigglebiscuit7484]

youre never too old for mini bikes and go karts

[@theaccidentalhomesteader3246]

@@frigglebiscuit7484 oh,,,, when I am on a first name basis with my chiropractor, yes…. I am to old….

[@alternator7893]

@@theaccidentalhomesteader3246 nah you just need a better chiropractor.

[@CarsandCameras]

This thing was 2 whole seconds faster than it was just 3 months ago, with lots of potential to go faster! We're gonna redo our oil lines to make sure we don't oil down the track again.

[@lukefortenberry2998]

Needs Nitrous

[@jimmyhughes5392]

so was you banned from the first strip or was you just too embarrassed to show your faces there again?

[@warlordgonagy143]

@@lukefortenberry2998 They can't give it enough fuel RN as it is, you think nitrous would help lol?

[@grovecitysirens_GCS]

I think you should use the engine from your 200cc shifter cart

[@dipstiksubaru3246]

I told you to get a snowmobile or atv clutch setup when u first built this thing!!!

[@dalefinch7824]

Did you guys know you can shave the weights in that primary clutch to change the engagement rpm? In our drag snowmobiles we engage around 4K rpm so it’s closer into the power band for a better whole shot.

[@Hitycooking]

kzbin.info/www/bejne/r2jan5-dbMahb9k

[@markmenix2473]

Yeah I think they are losing a lot from the clutch setup. I know on my rotax 780 banshee the clutches would make it break the times at the strip on it.

[@W.A.R.R.]

I have a kart with a Polaris 680 triple on it that engages at 4k. I’m hoping to take it to the track soon

[@adamr9215]

Just before the 11:00 min mark John mentioned that they can still tune the stall, so I guess they do know.

[@LeObsidianCraft]

4K is good for a sled that spins up to 8 or more thousand rpm this 670 probably make more power down in lower rpm ranges and doesn't rev as high.

[@Studio51media]

All of a sudden those burnouts are starting to look legit! Good job guys

[@user-ii7jo3ez7q]

👆Wow Congratulations You've Been Selected Among My Selected Winners 💙.

[@elwoodroadsmusic9639]

Exactly what I thought! Really starting to perform like a drag rail now

[@LILOREB]

Hopefully you didn't get scammed bud but this guy is fake.

[@dmwi1549]

Sounds wicked too!

[@johnnymoran1177]

Thanks for coming out and joining us at Triad Street Scene! We had a great time watching your runs. Come see us again October 19th and November 9th and 30th!! $10 to get in, free to race, kids under 12 free!

[@BIllMcCambridge]

Thanks for showing these boys some love. What a cool guy!!

[@kaseyjones4143]

see you are welcome back even if you did oil the track

[@cavemanvi]

They’re not banned? Awesome!

[@Jasonsminiadventure]

@@cavemanvi In motorsports stuff blows up all the time. It would be unfair to ban someone for mechanical failure given it inevitably happens to everyone.

[@johnnymoran1177]

No ban! We are glad to have them they are great guys we wouldn't penalize them for one little accident..

[@LittleRedsGarage]

A lawn mower engine has no business sounding that good or that fast, killer job guys. I knew you'd get it sorted out. 👌

[@harrygillman213]

those 670 twin lawnmowers

[@yoster77]

I'm SO glad you guys stuck with this build. One of, if not THE most favorite build of yours you've ever done.

[@joshuagibson2520]

This is 1000% cooler than any LS swap out there. There needs to be a class like this at every local track. Cool shit fellas.

[@helmethelmet8685]

It's called "Jr Dragster" My God son did it up in NJ it was for kids , 1/8mile ...lots of fun.

[@DIXIECRAWLER13]

For sure

[@motoman22atgmail]

Consider a boost referencing fuel pressure regulator. It might provide the extra fuel you need up top automagically…

[@Studio51media]

This is a Big one! I think this could single-handedly solve their A/ F mixture issues

[@motoman22atgmail]

You also may be consuming fuel faster than the open seat can flow period. Can you drill it bigger and still have the valve close with the float? Maybe modify your carb to use a fuel valve from a bigger carb that can flow more if not?

[@Studio51media]

@@motoman22atgmail Another excellent point! People don’t understand just how much more fuel needs to flow when using Nitro / methanol… the fuel,is LESS energy dense! But much higher octane [less susceptible to detonation] therefore you can get more energy out of it… but it requires a LOT more fuel… it’s counter intuitive. Gasoline is far more energy dense but it’s really quick to detonate… which destroys engines FAST and when boosting engines Gas is problematic.

[@Grimm-Gaming]

A feller thinks your right.

[@2wheelhoon813]

They just need a better carburetor. A Harley Davidson carburator has a fuel float needle that is over twice the size as the carb they have now. You can get good direct replacement cv40-45mm carbs under 50 bucks and they will support 120hp. Or run a mikuni with mechanical slide for about 100. Both direct replacement Harley Davidson Sporter/dyna carbs. They also have eccelerator pumps so that will fix the off idle stumble they are having

[@richardschmidt95]

2 recommendations. First put a really powerful rear brake on it so that you can hold it back on the line to build boost. Second,install an injector nozzle between the carb and turbo and add fuel thru there via a selinoid and WOT switch. You can jet that up or down to match whatever boost level you plan to run.

[@murmaider2]

I don't think you can load up a CVT like that

[@91CavGT5]

@@murmaider2 you are correct. If you load a CVT up like that you will end up burning a belt up in no time.

[@dennisnbrown]

It will blow the belt off that thing in five seconds of power break it

[@BIllMcCambridge]

Man we must be on the same wave length I was think exactly that. !!! Great minds think alike. Good luck guys.

[@rushking19]

I think it just needs a standalone

[@91CavGT5]

For comparison, many years ago my 2003 Dodge SRT4 ran an 8.2 @ 85 mph in the 1/8th with 279 hp and 311 ft lbs to the wheels. This little rail is movin!!!!

[@Greg1096]

Biggest thing is this rail weighs nothing

[@rycryco2592]

A flat slide carb with a accel pump might be fitting.

[@tonyking3125]

This turbo dragster is by far the best series ya'll have done..Bravo !

[@Sheehy223]

I've been watching this build since you guys first dreamed it up, nice to see it finally starting to get fast after all that work. Turbo was definitely the way to go.

[@davidanderson2393]

That thing just puts a big smile on my face, still has room for development, fun stuff and good luck on improvements to come.

[@RedneckSwede]

I would love to see more similar dragsters like this in their own class.

[@ozone385]

They have Jr. dragsters already, with that I like this style and it looks more adult size.

[@cavemanvi]

It’d be cool if they dragster-ized an existing cart!

[@nickrudd2568]

The Harbour Freight Challenge sounds like a plan.

[@testbenchdude]

Man, the fun and enthusiasm you guys had really shone through in this one. It was infectious! Really great seeing the rail live up to its potential. Can't wait for more!

[@paullutherborrow637]

You guys should contact FuelTech and see if they would be interested in trying to set some records ! Their injection system would be very tuneable on this

[@gerinchambers4787]

Hey guys, cars blow on the track quite often. It's racing. Power on pavement is a lot different than the Cars And Cameras Grand Prix. Don't hang your heads, just say "hey sorry guys" to the other racers, get them a bruskie and go back and race. Awesome video dudes!!! So proud of this build... and this channel

[@JoelArseneaultYouTube]

@bryduhbikeguy pointed out that your turbo return line is way to small, and he is correct. You need to increase the size of your return to at least 3/8 if not 1/2" inside diameter. I left my original comment below not to try to hide what my original thought was. If you have too much base pressure, the solution is not to seal it up and lock your hoses on better, the solution should be to lower the base pressure with more / bigger vents. You lines should also be secure, but you need to get rid of that pressure.

[@bryduhbikeguy]

A larger diameter return line will help drop the pressure.The fitting into the block is way too small.It acts as a funnel and pressure builds there.

[@JoelArseneaultYouTube]

​@@bryduhbikeguy

[@hotrod7938]

You want the primary to grab at roughly 3500 rpm with that v twin. Reduce primary flyweights or add spring until it does. This will get it right into boost. Next time on Dyno watch your peak hp rpm. You want to be 10% over at the finish line. This can be done with the secondary spring adjustment. Make that exhaust pipe longer so it doesn't gas you. AN fittings good 😊

[@topshopbuildandfabricate24]

Ok guys I dragged raced on and off from 1980 until 2008 and watching y'all ripping this home built dragster with a lawnmower engine basically is getting me excited one of y'alls best projects ever and I am impressed at what it will do and sounds awesome to boot

[@acurarl9929]

Wat did you drag race??

[@topshopbuildandfabricate24]

In the 80s my favorite car was a 72 Chevy luv with a small block my last car was a 72 chevelle 426 ci small block and a 600 fogger system that car ran 8s good times but spent in 10 yrs enough to buy 2 average houses lol

[@Buck1954]

You guys will keep tuning this till you get what you want. I have confidence in you. When I was a kid (1960's), there was a guy down the street that had a rail. He was sponsored by his employer, a Chevrolet dealership. They tinkered with the rail for several months, rebuilding and swapping out two Chevy motors, until eventually he and Chevrolet started taking trophy's. You guys will too.

[@Ogsonofgroo]

One of my favorite project vehicle builds of late, that thing is a beast! Ya'll make a great team too, highly watchable! Big cheers from your fans in the PNW, B,C, Canada :)

[@jeffrykopis5468]

You forgot the "eh?".

[@jeffrykopis5468]

I ran low 13s at ABOOT 108mph in my ZED 28 at Mission, eh. I celebrated at Tim Hortons.

[@TJPDmember]

@@jeffrykopis5468 you ok?

[@Ogsonofgroo]

@@jeffrykopis5468 I know eh :P Cheers!

[@jeffrykopis5468]

@@TJPDmember Obviously you do not speak Canadian, my son. I am not a NATIVE speaker, having lived on the UNFRIENDLY side of the border. But I was up there a lot.

[@jacobrzeszewski6527]

Y’all gonna have to build your own drag strip pretty soon.

[@EJ-74]

NIIICE 🔥 Love the Go Or Blow plate Y'all done a great job on that modification also. 👍🏻

[@Hitycooking]

kzbin.info/www/bejne/r2jan5-dbMahb9k

[@dennisnbrown]

I’ve been waiting for this video and it didn’t disappoint. Great job. You guys make me wanna build one

[@WingmanJohnny]

Great work. Keep up the great work and I will keep on watching

[@kevin.prickett.9563]

Time to make an old school looking rear engine rail, with all the eye watering and fumes, not to mention flying parts. This is my favorite build.

[@user-to4pg6ut1x]

Wow Supporter For Showing Love Congratulations You've Been Selected Among My Shortlisted Winners 🎉.

[@timtucker8270]

You and your channel have come a LONG way. You guys are awesome!

[@user-ii7jo3ez7q]

👆Wow Congratulations You've Been Selected Among My Selected Winners 💙.

[@kevinsellsit5584]

This was AWESOME! Improvements throughout the day YES! Always keep the engine cam on like you did in the first runs with Ike driving. I was able to see that the torque converter does not complete it's full travel until about 7500 rpm. You changed the gear and then took away the CVT cam. The ideal gear might be the one that didn't fit. Oh yeah, John, a word with you in private please. At 7:30 you mentioned the dragster was expensive...enough of that! We racers never discuss cost except with our sponsor's. Money is no object when it comes to drag racing! ;)

[@jazz1on]

Very cool, great improvements. Long time coming - can't wait to see what's next.

[@sethcude]

I love all of y’all videos keep up the good work!😁

[@Hitycooking]

kzbin.info/www/bejne/r2jan5-dbMahb9k

[@HotAsHellSeedCo]

Awesome ‘creation’, guys! Lovin it!!! IKE; Suggestion. Put the face shield down. Two reasons. (1) It keeps bugs and fuel out of your eyes. (2) Because safety should be a priority. The shield can come apart if you were to roll that thing and your head is bobbing around on the roll. Otherwise, keep driving like you are because you seem to be a natural race driver. 😉

[@bobmanzi7712]

looked like a lot of fun, great stuff guys thanks

[@brianz367]

So excited for the next videos in this series. Awesome job guys! Congrats!

[@JM.Performance]

this has been my favorite series ever! please keep the rail videos coming!! i wanna see this thing run a high 6

[@ProdigyAutomotive]

This would literally gap me in the 1/8th.. Good job guys 🤘

[@lightcapmath2777]

Excellent! loved watching every minute. I know you allll can make it work! Best DVD:)

[@benpeter4959]

this cart is by far my favorite content from you guys and I've been subbed for years

[@962RACER]

If you don't have an oil regulating orifice on the turbo oil feed, the pressure will be too high and damage seals quickly. Your oil return line shouldn't experience so much pressure to blow off.

[@user-to4pg6ut1x]

Wow Supporter For Showing Love Congratulations You've Been Selected Among My Shortlisted Winners 🎉.

[@junkyardboost8372]

Oil return line is seeing pressure because of crankcase pressure, not oil pressure. Journal bearing do not need a restrictor. I’ve built many cars with journal bearing turbos and no restrictor. What you need is a good flowing drain and adequate crank case ventilation.

[@962RACER]

@@junkyardboost8372 Aah i see, i was under the impression they both need an orifice. Thanks for the info.

[@ralphhondaman]

Another thing I'll throw out there. I've built quite a few small turbo motors and one thing is if it's a journal bearing turbo then they don't require a lot of oil. And with boost you'll have lots of bottom end pressure so you need a big crank vent put a catch can on it. If you have to much bottom pressure the oil will have a hard time returning from the turbo which the it can push past the seals then burn the oil.

[@johny3barr]

Glad to see a scatter shield on that rail !!! 👍👍👍💯

[@brendandevers2789]

Keep the good work up been watching yall sense day one be safe.

[@willc3586]

Pretty sure you can buy different weights for that clutch to get it to engage at a higher RPM. That's awesome 👍

[@jparker785]

It's still a race car. If you ain't breaking parts, you ain't racing! Definitely my favorite build guys! 😊✌️

[@petekobraoutdoors7324]

That was awesome guys, lots of fun and good times. 👍

[@stempo1]

Fricking cool as hell! Love this channel!

[@squarebodycasewademckenney6190]

It's the no boost/idle launches that killing it.... hold the brake and give it just a little throttle (not much) just to build the slightest boost

[@majorrev8690]

They've been told this ad nauseum. They chose to ignore the advice. I'm very surprised it ran in the 7's though. So kudos to them for making progress. If you're not making mistakes, you aren't making progress either. They have learned a bit lately.

[@jacquescrusan9500]

if you're blowing the return line off of the turbo, then I'd definitely troubleshoot that. I know you stated that you're tearing the engine apart (good on you), but for future runs, I'd definitely look into a possible solution for Positive Crankcase Ventilation (PCV). When it's happened to me, it's been mostly due to blow-by in the crankcase exceeding what the stock PCV system can handle. I've personally solved this by running a small electric vacuum pump with a vacuum break valve set at 14" of water/H2O. Don't get me wrong; reinforced lines *will* help you in this area. I'm sure of it. But that still won't fix the potential root of the problem.

[@geecee4]

YAY!! Awesome!! I knew y’all could get her down the track at a good time 👍 Great job all of y’all. Can’t wait to see what’s next… Takes years to get things right. Y’all show what perseverance is and that’s a principle that kids sure can use.

[@natchrgusy1128]

love the drag rail !! best cart you have ever made forsure

[@faroironandcustoms6577]

Nice one guys!!! I would not worry too much about oiling the track. It sux but it's part of racing. And if you do it long enough it will happen again. Potentially on something different. Sounded great!!!!!

[@SilvaDreams]

Seriously no need to be embarrassed about blowing something on the track. Use to live in NC where they are and drag racing is big... Hell growing up my friend and his father had dragsters and they blew engines or threw rods all the time.

[@acurarl9929]

It’s not part of racing when you have no business taking the next step past the dyno. They were nvr ready to leave the dyno and still are not. They are chasing problems they don’t even have yet. They don’t have a gearing problem or launching problem or any them. They have a problem:leaving the dyno knowing well and sure the thing is not right aka not ready for a track day. Period. Our tracks must be different here because you can’t run socks on your carbs. It’s a fire hazard. Backfire hazard. It’s a clear indicator that the engine is a hazard. Two tracks down. Don’t worry bout it. Stuff another sock in it. L😂

[@frigglebiscuit7484]

@@acurarl9929 hey, gfy.

[@faroironandcustoms6577]

@@acurarl9929 Right?

[@jamesfrost5261]

If it was the oil pressure Guage line again, use a copper line. The plastic line they come with is the worst thing you can ever use. I would think Ike would of known not to use it. Also make a small oil pan under the engine like a real drag car uses and line it with the absorbent mats used for floors. Thar said, the rail is running great, put a main jet in the oil feed line of the turbo to restrict the amount of oil going into the turbo and that will help with the oil seals in the turbo. Running methanol threw the turbo probably doesn't help with the life of the turbo either. Why not brake out the fuel injection setup you tried a few years ago on the drift trike? Might need to use bigger injectors but at least then you could run it after the turbo. Whatever you do turn the boost up I want to see a 6 at 100mph

[@mikecurrington5641]

Racing a home built dragster with your mates! It doesn't get much better than that.awesome build guys👍👍👍

[@jamesmcgee9279]

I love it guys! Way better then ever before!

[@gradybrowning3976]

91 MPH ain’t too bad Guys!👍

[@Wheeliegan]

It would be cool to redo the turbo system so it sits lower and then make a fiberglass shell to reduce air drag🤟🏻🤟🏻

[@sandyv4819]

Full blown door slammer dragster with a whole pivoting body!

[@fishes4life362]

Awesome guys way to keep trying, you guys have done Great!!!

[@profoxgameing3034]

you guys are dope keep up the good work you guys are one of the reason young ppl are interested go karts and cars love yall

[@WrenchAtHome]

Awesome video, this thing rips! Are there any repercussions for oiling down a track (besides some angry faces) like a fine or a temporary ban or something? I assume it never happens on purpose so that would be harsh..

[@Turbowagon]

No, if you constantly came out and did it everytime they may have a talk with you but oil downs an accepted possibility.

[@WrenchAtHome]

@@Turbowagon Thanks, that makes sense!

[@Goatee_yay]

What rpm is max power at? 7500 may be too high and some heavier weights in the cvt might make it faster...

[@GodschildinNC]

Way to go guys!! Can't wait to see how it does next! Show the rebuild

[@Presy_P]

Absolutely loving this series

[@christophermorin9036]

Hey guys, if you actually DO destroy the 670 this time, Predator has a 999cc V-twin engine now. Edit: Whoops! It's a Duromax, not a Predator! My mistake!

[@squarebodycasewademckenney6190]

What😲 I've never heard of this

[@christophermorin9036]

@@squarebodycasewademckenney6190 My mistake, it's not a Predator, it's a Duromax Sorry.

[@MonkeyMikeOutdoors]

very cool! Good job guys!

[@victoravina409]

best episode to date. keep up the great work guys 🔥

[@rimshot223]

I love this build guys. Keep up the great work!

[@mackelby1]

Best build in your KZbin genre right now.

[@johnmay8887]

Really love the drag vids and can't wait to see more of it! It would be awesome to see a future build of a sled puller!

[@Skater3z3b]

This was very cool to see. Love the build guys!

[@hoodoo_taco]

Great fun watching!!

[@JoshKetchum]

Hell yeah brothers keep up the good work!

[@krisjato]

Great job guys! I'm finally impressed with the drag rail... That thing was gettin it! If you could get a good launch and get the gearing just right it'll get a low seven at over 100 MPH. Thanks for sharing, I really enjoyed it! Great job, I look forward to seeing it and you guys back at the drag strip.

[@jordan_5l]

11:09 Charles had me crying 😂

[@Manandmachine772]

Woohoo!!! Congratulations, now let’s go faster!! Get the fuel sorted out then start playing with the gearing and clutch. Really enjoying this build series. Anxiously waiting on the next video.

[@jasonlopez4855]

That's a good looking racing suit. That'll definitely keep the fire off of you.

[@thilmandufrene1813]

I always loved this build when yall first built it! Glad yall been running it again

[@martinlicht1969]

Fun to watch this engineering marvel progress. Good job guys!

[@ryanwilliams1651]

I love it!!! The coolest little dragster

[@justinduffey9237]

I loved this video. Especially thinking back to when y'all built the rall. My how thing have changed.

[@BuickandScatPackKyle]

That 670/dragster is moving! Love the build!

[@Summit-Adventures]

I love the vids keep doing what you do

[@CDOGG500]

Love you guys!!!

[@DerkJester]

I like the subtle “Nice” after reading the mph on the second pass. 😄 I feel cheated that y’all didn’t come back to Farmington. Lol

[@NDKY67]

Great episode guys

[@yoster77]

@9:59 - LOL just noticed the "Don't be Stupid.." LOL that's hilarious

[@hipzipper1]

Nice work guys. Love those V-twins.

[@robertwhatley9078]

He almost went back to the future, Charles that was a good line 😂

[@campcrafter4613]

I did not see this kind of dragster coming ! What a great class this could be!

[@samuelsmith5737]

I bet hitting the turbo directly with a tiny nitrous fogger shot should build up the boost quicker. I've seen a few turbo cars use nitrous just to help build boost quicker. Love this little dragster😀

[@Matthew-wj8cm]

Yeah Carson my boy! Awesome vid guys

[@teamedgamingttv]

Holy cow I remember subscribing and send this Chanel to my brother and dad at 4k. Time flys

[@floatz76]

Keep up the good work, boys! I can't wait to see this thing hit triple digits!!!

[@haroldparker3487]

I really love how that thing sounds, yall rock.

[@dsgp7835]

What's fascinating is this is how the sport started. Garage projects of many different kinds and people working to make it go faster. This block and internals will only take so much but that's the fun, seeing how much it can take. I would love to know more about this powerplant. Not what you've added, but the manufacturer and design.

[@callmecardo916]

That dragster Rips pretty good Nice work you guys on this one👍🏼👍🏼

[@JohnHill-jm7tm]

Another great video guys 🥰. This Old Man from Washington NC knew you would not give up 👍. Love you Guys 🛵🧔💝💝💝

[@jeffjankiewicz5100]

John, Ike and Charles, that was freakin AWESOME!! Too bad that oil line popped and crapped all over the track. A freakin 7:89 @91mph in a boosted 2 cylinder!!!!! Amazing, speed in 680 ft. I call that a WIN! Next.......Fix the oil line, check the health of the engine then hit it with the moon toon and see if it can get low 7`s or high 6`s. Can`t wait to see the dragster again. Awesome job guys.

[@rykerowen6461]

yessss yall did great