To get into 4th and 5th gear change ur pulleys up so your engine RPMs stay up. Its all about the RPMs with these motors. Smaller sprocket faster RPMs.

This may be something to consider: Out of the box, from what I've seen, the Predator 670cc is very restricted from an airflow perspective. If the carburetor and the exhaust were opened up a bit, you would probably see some actual power out of it. The stock muffler on the Predator 670cc is the worst offender, imo. Robot Cantina is working on a Predator 670cc powered 60s Renault series, btw. He may have some notes for you if you want to "open the taps" up a bit.

My opinion on your problems with the 670, first the fuel delivery, on the truck we built like you i put a boat gas tank in the bed and ran a fuel line to the engine. Used a 2-3 psi fuel pump and works wonders. I think that will fix your hard start problem. Remove the governor to get a few more revs and hp and it will perform much better. The vibration i almost guarantee is from all those chains and clutches you have. Run a choke cable to the cab so you can get it going as well.

I dont have any tips (wish I did), just want to give some encouragement to keep on chuggin with this project, its very interesting, educational, and I think you are inspiring a lot of us to put something like this on our short list. Love this series!

I have a 670 mud motor you almost always have to tune the carb super simple to do. Also bypass the pulse pump and use a inline low pressure pump derictly to the carb. Been watching alot of you videos and I'm currently about to start my own build similar to this for a pasture truck. Keep it up man and great job so far.

Two clutches thats pretty cool i would have never thought to do it that way.

This project is so much like my dreams it's scary! I'm bought in for the long haul, so keep the content coming. Side comment: i hope those that don't like you talking in the videos follow that advice when they make their own content on their channels. For your channel, please don't change a thing.

I used to have an '89 Mazda B2200. Owned it for over 20 years. Best truck I've had so far.

Cool old Mazda truck! I miss mine.

My husband and I enjoyed meeting you at yesterday's car show and seeing this creation :)

You just make the most awesome videos Chris thank you so much I always enjoy your videos and your smile is just infectious thank you for your wonderful videos and I can't wait to see your truck with the big wheels on it. God bless you for the joy that you bring to others.

I was hoping for better results. Love the tractor tires.

Definitely sounds like a fuel delivery problem. Get a small low pressure electric fuel pump and running the choke cable into the cab should help getting it started easier. That's pretty smart thinking with the double clutch 👍

Love the honesty

What ever you do to it, it's still fun to watch. Keep on keeping on

A toothed belt or maybe a double V-belt may be better between the Predator engine and the double clutch input shaft, there's a lot of mechanical loss in that first chain drive off the crankshaft in the form of vibration, and that will be the first thing to break.

Reach out to the guy with the "Robot Cantina" youtube channel. He's currently running a 670 predator in an old renault with a rear engine setup similar to the VW Beetle. He's been working with the exhaust and carburetion of these engines to make it driveable, and you both could take notes from each other. The factory 2bbl on the 670 is made for constant rpm operation, and not accel/decel. He's having power transfer issues, and your setup looks near bulletproof. A properly jetted Khein with a spacer and intake from perfomance670 with a better exhaust would make a major difference. He's topping out in the 60 mph range. Good luck with truck.

Oh man you are getting it together, I agree with fuel pump and maybe a choke warmer to get it warmer quicker and yes bring it in side all controls that you can

No clutches needed, period. Wasting HP. The transmission has a clutch. What you need to do is make a shaft with 3 bearings. Holding the original flywheel and mounted to the Bell. Then, sprocket the output shaft of engine to the flywheel shaft. You can do this with 3 or 4 belts like a light helicopter. Has a pulley system that tensions the gearbox. I like your project. Good progress. I'm sure you thought of all of this.

You just gave me a great idea. Do this with an early 70s mini truck like a Datsun, Chevy Luv, or Ford Courier.

What if you used the stock mazda fly wheel on the pillow block bearing setup and use the new input shaft for your chain linkage. That takes the friction loss out of the dual clutches. Gives you back the usage of the clutch.

Just a thought but seen another channel use this same 670 motor and they modified its exhaust and taken out the governor actuator which is inside the engine. Seemed like it would rip really good after that.

These videos are super helpful & deserve a lot more views

There's a 500cc Duromax now, 20hp. It's a single cylinder and has both the recoil and electric start. Just putting it out there. 50mph is the magic number for me, but I don't care to go to the twin and lose the recoil start.

As always Chris an absolute fantastic video and I can't wait to see your new truck. I hope you and your family have very Merry Christmas and I hope this new year is the best year of your life ever. Be safe and healthy And to you and your family always best wishes and blessings.

Have you seen the two speed mini bike transmissions. Add something like that essentially splitting each gear for a ten speed function

That’s a bummer the engine it’s working out so well. I think these engines are sold really lean from the factory. Probably re jetting the idle and main jet will definitely help especially when it’s cold. Maybe you already got it sorted out? Thanks for always making great videos Chris 😊👍

Hey its Chris from Key farm, first of all we like the way you talk, it helps to follow your thoughts. Thats not in a Slingblade way uh huh

This is absolutely amazing! I dream of doing something like this! I'd love to put a motor like that in a punch buggy.

I would like to see a belt and foot clutch set up. Just pullys and belts With a belt tensioning pully in between them. All dual belt pullys. Depressing the clutch releases tension on the middle pully. The tension pully can be either flat or groved depending on whether the pully is inside or outside of the belts. Your gearing can be achieved with a combo of pulley sizes.

Red Beard Garage is another channel you may want to checkout for info on that 670. That guy knows quite a bit about all or most Predator engines. Probably give you some tips or somewhat inexpensive ways to increase the power. But I also think you’re having a fuel delivery problem. Might want to check into a low pressure electric fuel pump and maybe a Mikuni carb setup. But I would definitely move the choke and starter switch inside the vehicle for convenience if nothing else. Cool video btw. 👍

Replace the rubber brake line its collapsing on the inside and wont let the fluid back up from the caliper

I put one of those engines in my Volkswagen Bug

How many miles to the gallon does that truck get now

84 tooth saw blade. Dang. My kind of fun.

Id like to see someone use one of these engine to power a hydraulic pump and run the truck with a hydraulic motor

I'm curious to see if a fuel pump with a variable pressure regulator if it would help with your idle issues. I have that motor in a generator, and the gas tank is above the motor, and it runs great. I'm enjoying this channel and look forward to more content.

lol I love the energy sir

You need a vacuum fuel pump to feed the motor

Now it needs a hood and a hood scoop! 🤘😁♥ Who cares about power. Build it as a easy to find parts apocalyptic vehicle! Just have fun tinkering!

This is fascinating I learned something new today

Be kinda cool to,put 2 670 predators combined with an actual fly wheel and clutch with homemade exhaust

Just put a mounting plate at the end and have a shaft and go through that is chain driven by the motor and at the end of that shaft have the flywheel which is connected to everything just like a regular car. You're going to dump more money into buying go-kart clutches and everything. And those clutches are not made for that to go with that fast. It's easier just to use the flywheel the clutch everything that came with the original setup and just have a shaft connected to the flywheel just like you would have a flywheel on the engine crank shaft. You would have to weld up a metal rig so that it would hold the engine up high with a chain going down to drive shaft and at the end of the drive shaft again at the end of the drive shaft would be the flywheel.

I have your trucks twin. Its gold though

What's your mpg at 45ish I wonder. Set up a mile highway ride if you can on a small outer road. Refill and see mpg. I'm curious as hell. Great video 🤘

I wonder what a cvt transmission would do.

🙏🙏🙏🙂♥️👍.looking forward to see the outcome

I was jist going to recommend smaller skinnier tires and wheels for less rolling resistance and to add an electric fuel pump with an adjustable regulator. Keep weight light as possible for brakes just use the rear s with a parking brake lever ma be

There is a 999cc predator. It’s 58 ft/lbs of Tq I think.

Hey man, this was a good video! I am gonna watch your others now. The 670 is a dog for some reason... IDK why either!

Brakes need a vacuum to work on the old cars but that 2nd clutch wont help cause if ya look insde them they are designed for a motor to spin 1 way but ur also loosin torque in the chain but u HAVE to have the tank hgher cause it has to work like a syphon so it cant get the fuel,regap the spark plug can also give ya more power but then gettin a better quality spark plug will help But remember the motor only does 3,600 rpm like the other motors you have put it so mount the motor lower so the shaft nearly is level with the actual gear box will improve it alot ;)

Dumb question but how do you do the wiring on the transmission and transfer case

Adjust the governor or remove it and get more RPM. Stock is 3,600.

now for the 999cc duromax engine

a 670 twin should be loaded with torque and have at least 80HP . . . as mentioned try remapping and open up the intake and exhaust, I think they are designed for water pumps so like a lawn mower they're governed and have an auto torque idle up, replace intake with a sportbike setup, CV carbs or FI

I have a Ford small ranger with a v6 automatic, the engine crapped out would this mate up to the automatic and make a grocery getter?

I haven't seen enough of your videos to know, does your setup work with automatic transmissions? I just subscribed ,so maybe you've already covered this.

Put one of those 100$ eBay turbos on it 😊

Have you changed the gearing in the differential of the truck?

AWesome channel!!!Thank you!!

Im sure you will have it figured out by now

Me I'm the other way I love tourqe converters and I don't like centerfugal clutches.... much faster takeoff and no burning out the clutch and not being all sluggish on takeoff...

think the dual clutch should work you might make the second clutch grab at a higher rpm that way you have a little more slippage (they grab in stages ) so you can run a higher gear from standstill just checked the price for one of those v2 engines , 1800 bucks (in the netherlands) ..... wow thats not cheap , a rebuild smart engine with a core exchange is 700 bucks and a whole smart with some mecanic work is about 750 bucks over here a smart car might actually make a nice base for a smaller predator engine , its running a 700 cc engine in stock form and are pretty light as for adding power and making adjustments , look at robot cantina , hes working on a car with a v2 predaior in it doing different adaptions about the bigger wheels.... too bad you havent got another set , one thing you can do is use two engines one mounted in the back and one in the front and drive each axle with one motor m should work ok if you eather use a direct drive or find a way to work two gearboxes at the same time with the dual clutch setup you could allso lengthen the jackashaft and run both engines or run them side by side with a single chain across and on the same sprocket through the dual clutch set up , will need to do some fancy stuff with the electronics as i seen someone done it before and he needed seperate deadmanswitches as the ignition of the one caused misfiring in the other when he put everything in series on a single switch

How are u shifting gears. Dry shifting

you need change parts diferential change the sproker more small run more faster

Have you thought about adding a small full pump?

gotta use that comet 44 magnum cluth

FINALLY

Is it street legal/ pass emission test?

maybe a CVT trans.

wow yeah i would have thought it would have done better . i really dont want to think its the engine . i could be wrong . i watch a guy doing the same thing with a car . you should or maybe have watched him to see what hes doing . his channels name is robot cantina . hes doing it in a old Renault . he has got it up past 60 mph . he uses a torque converter . and i think that might be your issue . it takes a little while for the torque converter to get to top speed but it allows the engine to work through the gears of the torque converter plus it has the gears of the manual transmission as well . your running more of a direct drive of sorts . i think them clutches are robing power from you . but i could be wrong . i just cant make sense of the power loss other then that . hey if anything else maybe get ahold of robot cantina and swap some ideas on it maybe you can work it out . maybe put that 670 in the mg .

Duramax 999cc engine.

Torque converters are superior

you want speed and torque get a comet 94c

if ya want speed

GTFOOH ...WTF.....I GOTTA DO THIS..NEW SUB BROTHER

Turbo time

👍

Put a 20 tooth on your jackshaft lol you will fly

Sounds like the stock jets for the carbs is to lean, do a bigger jet.

thats so awesome dude it works like its ment to be, just needs a little bit of an exhaust, theres a whole ton of different parts on ebay to prep up the power, pretty much enough parts to start out very very mild an work your way to wild lookn an moving real well for bone stock, stay blessed chris !