6.1L Stroker 12V Cummins Engine Build | 800 HP | Power Driven Diesel 

I would love to see a full build sheet on this motor

Holy shit! I’ve never heard of doing a 5.9 top end 6.7 bottom end Cummins. Raising the compression ratio made me drool. Mechanical Mafia!!!

I raced a daily driven shop truck 1994 Dodge 2500 2wd with over 220,000 miles on it back in 2005. My fastest 1/8 was 6.9 et @105 and one of the fastest 1/4 was 11.06 @ 128 mph. Running between 1 and 2 stages of N2o. The 11.06 @128 was at a DHRA event at Famoso raceway back 2008 on a single shot of N2o. The engine was running had orginal stock internals and running "stock" head bolts. Turbo was a High Tech 66 with a stainless steal 16cm turbine housing. Injection pump was our in house 13mm pump with a Fass hpfp . The cam gear was welded. Transmission 47RH was built by Joe Webb at Suncoast transmission running their Pro Lock 5 disc torque converter. Detroit locker with slicks and Cal Tracs in the rear. I got a call from Jason Sands one day from Diesel Power Magazine. Asking about how a group of us was getting away with running stock head bolts that he was doing a article on. Garmon Diesel was also running stock head bolts as well. My Theory or what i did and what Garmon was doing is to torque the head bolts in 5 ft lbs increments. Also a high milage head gasket is better then a new head gasket. Why? My Theory is the head gasket, block and cylinder head lap into them selves over time from thermal heat cycles. I raced the truck from 2005 to 2010 and drove it between races every day. I found out the hard way 2 stages of N2o on a single without a external gate only last 2 passes before the turbo comes apart at 80+ psi of boost. But the long block never gave up. I ended up pulling the head because of the aluminium turbine shrapnel getting into the valves. The cylinder walls where perfect no scratches. I do agree head studs are better then head bolts. But we proved how far you can push stock components on these engines. They will go farther then most people think. Nobody thinks to retorqued the head bolts. Thats the 1st thing you should do before turning up these engines. Half the time there under torqued from factory.

My favorite diesel channel!

Bought my first Cummins in 1991 ... this is good stuff

The attention to detail from you guys makes your channel interesting to watch. Plus you respond to most all questions. So many RU-vidrs get so big they fail to even address any questions or comments. Keep up the good work. Looking forward to owning a 800hp Cummins some day and you guys will definitely get my support and money spent. 800hp and 20mpg would be incredible.

I love the way you explain and teach!! It’s great to watch your videos .. I have been to turbo school and have learned lots. It’s nice to learn from the pros! Keep up the great work guys!! I love this build!!! Great design and build quality !! Great motor!!Awesome work!!

First time I've ever heard of a diesel stroker engine, didn't know that was possible. That's awesome, 🤘👌

Guess doing my head gasket on my 12v happened at the right time! I need a truck like this!

as always a great and informative video, thanks guys!!!

Fun video, thanks for all the details!

I need to get entered into this lol that thing is gonna be sweet!

You guys are awesome can't wait to win this truck!!!!

Great content guys

Probably the only guys I would trust a giveaway truck from

Awesome info. Hopefully I win this truck, it will be my first diesel ever. Keep up good work and looking forward for more videos.

Wow lots of good info. I hope the be the luck one to win Agnes! You guys keep up the great work! More power to you and stay safe. With a truck that fast don't think covid 19 could catch you. Lol..

you guys should do a video or two on the stroker setup and working the block to fit the crank..? i know id be interested for sure haha

This episode has cost me about 6k so far lol I bought a 6.7 crank rebuild kit new 5x14 155 spray injectors the mahle pistons with .080 cut off a Hamilton 178/208 cam and a bunch more I cant wait to get it done it should be a beast

In the UK our diesel vehicles are embarrassing, 2 ltr is about your max these days. Love watching all your shows, can't believe your knowledge on these things, guess that's through trial and error. If I win will you send it to the UK???? Cheers guys. Keep up braking stuff.

Agnes, Tina,... I LOVE the names you come up with for these trucks! 😂😍😂 That engine sounds like a beauty! Might have to do a "Fummins" swap down the road when my 6.4 F-350 bites the bullet. Great job, guys! 🙌

When you guys put a fresh build through a heat cycle and “hot-torque” the head, have you ever done the same for the bottom end (caps & rods)? Ever thought it necessary?

I have looked in all your videos about this truck but couldn’t find anything about what the gap was on the rings. Do you have to open up all three?

I was going to do this but chickened out due to it being my first diesel build. I have a 24V PPUMP, that is totally rebuilt. I have everything that is required. The only thing left to machine (minus going to 0.020 over, should have done this but was right at spec for 330K miles) are the pistons. Does a 24V block need to be clearance to accept a 6.7 crank?

I no I can't wait to go up their so we can drive it 😁😂🤣

So what’s a safe boost level for light daily chores and occasional towing maybe 24k lbs through the mountains with this setup? Love your vids btw, super educational and entertaining.

I want you guys to do a review of the wiseco stroker piston for the Cummins one day.

So if walked in the door and said build me this engine how much$$$$$$$$$$$ are we talking?

Boy would have loved to won this.

What size injectors did you put in it?

I absolutely love the idea if the sleeper. I'm about sleepers

Can't wait for the drawing for this truck. And who won the march drawing?

I'm a big fan of numbers so I built a couple spreadsheets to calculate cubic inches, liters, and piston speed based on bore, stroke, and number of cylinders. For those who are curious the engine they are talking about is 370.71 Cubic Inches 6.07L which of course rounds up to 6.1 as they have said and as long as you keep the RPM below 6k you keep your piston speed below 5000 ft/min so give her hell :)

I've got a 5.9 24v and I'm looking for 800to850 I've got the stage 2 rebuild ket now what must I do to reach my goal

How do I go about getting my hands on these pistons?

I like the level of detail you guys give. Would you happen to know the cam specs for a NA (suction) engine? (for comparison) Thanks.

Okay so you guys did a video a while back about turbo blankets do they make your egts worse i just want one but my egts are already a toasty 1500 soo?

Hell ya

How well do the steel pistons hold up for daily high power use? p.s. I will add that raising compression also makes it start easier in the cold weather.

I would love to have you guys test my head portwork against the best. I out in a larger seat and port it out about 4mm to the sealing angle so I port it to the maximum % for a reliable biuld. Then open up the bore and smooth out the ports... I use 1/8 6" long burrs and can get a very nice port I just can't clean the floors without lopping off the intake but the rough floor kinda helps tumble the air nicely into the chambers. I would love to see you guys test my work if I can send in a head for you to test it against others available. Maybe good piece of content i think.

At what horsepower would y’all recommend on expanding the block? Like for piston clearance? And was the 400k miles thing true? That you should actually have enough space? Or clearance?

This video just came to me. I have 97 with 525,000 miles on it. I want to build it up now that I am retiring the truck from service. Is it too late to enter? If not, How to enter.

Question: Doing this stroker build, is there a chance that since the piston is traveling further down the bore, that you might get a higher chance for piston rock as it gets to the bottom of the stroke? I know this can be a problem with Chevy ls engines when doing a stroker, but was curious if this might happen in this particular setup.

i have a big question. i wanna build a similarly motor and for the crank is it just a factory 6.7 crank?

I’ve put in a lot of ordered this month just to win this sucker. Not to mention I’d do some weird sh** to win this sucker.

Do the ARP main studs require a line bore on the mains?

How would that 6.7l crank work in a 12v used for towing with a set of compounds around 500-550hp

why not use the marine pistons with both of the compression ring lands iron?

How much would it cost to order an engine with this build?

You guys should just build diff motor quality’s with core charge 😃😄

Why not steel pistons like they use the OTR diesels? I know they are crazy expensive but I'm talking about your race trucks not the give away truck? That way you don't have to run such crazy clearances since the piston and block grow at the same rate or close since obviously the piston is getting hotter than the block when you're running 2.5-3k hp.

Yalls daily driven 1200hp 2400ft lb truck......how long do yall expect to get out of it before internal maintenance is necessary like rings pistons valves ect???

Update on the charger?

Right the F on guys, this thing is gonna be a RIOT to jack around with for the lucky guy or gal!! Sounds like I better start couch tippin and walkin roadside ditches for coins and beer cans so I can buy a hat or sumpin to get my name scribbled with Crayola on a ticket 🤣. Keep the content comin guys!

I haven't been lucky enough to see a set of fire rings not break before they reached 100K miles yet. Of course that is a lot of thrashing on one of these engines at that power level. How many over 800hp 5.9's have you seen make it 100K miles without needing the head to come off?

How do the 24 valve flow numbers compare with stock 12 valve and modified 12 valve?

Roughly what is the compression ratio of that 6.1 stroker and can you use a low compression 5.9 L piston in a 6.1 L stroker build

List of parts and prices please

So y’all bored it .010 and kept the stock size piston correct?

since I live like 20 min away, will I still be entered if I come in to buy my rebuild kit ?

Hey guys, I'm looking to buy your 485 hp diy 47re soon, along with the 450hp fuel kit. Will my stock internals and turbo be able to deal with that for a bit ? I've already got 509k km on it lol.

280 thumbs up w/o a thumbs down..? Holy crapper, unbelievable... of course I just jinxed it huh.? Great job boys

Can we order this engine built to drop in our trucks?

Can This motor fit in my ford 2008 CUMMINS VTA 903 600 HP DIESEL ENGINE

Quick question does the truck also come with a traffic lawyer? If not I'm not sure if I should enter :) I've already paid for the repaving of far too many of our nations highways.

Well dang! I just bought IFG studs for my 6.7 not even 2 weeks ago..... :(

What CR do you end up with after machining the pistons?

How do the fire rings hold up on a dd?

Is this 400k mile reliable?

I'm just waiting for my 800 hp ticking time bomb to blow-up head has never been off all stock but fuel air valve spring and mighty diesel headbolts and a little nitrous.

Were can I get one of those fire ring grove cutters

Did you dyno Agnes?

Can the light weights 6.7 crank go in a 03 5.9 block

Did you guys ever announce the giveaway on the turbos and injectors?

Kinda curious why y'all went with p-bearings and not with H or HX bearings?

Power driven diesel, please let us know the pricing of a build like this. I know I’m not the only one who is wondering how much this build would cost. PLEASE let us know

What kind of fuel mileage would this engine get?

What’s the max you can bore a 5.9 block?

Is that white lithium grease you use for assembly lube? If so, why lithium rather than one of the many purpose made lubes? Not making fun, it's a legitimate curiosity of mine.

I have a 2006 2500 24v will this stroker work?

Hey don't make jokes about my stock Cummins.😢 It will be getting governor springs soon but I just haven't had time yet.😂

I think my 6.7 .020 over block with a 5.9 crank works out to 6.55L. Be mocking those 6.6 duramaxes lol

My 5.9 is about ready at 420k miles... I'm not sure I could afford the transmission.

Need Mechanical Mafia Hoodies

Wait a second I bought a turbo for my 3rd gen does that mean for every dollar that costed I have an entry??

WHERE CAN I ENTER TO WIN THE TRUCK?!

This is the engine I need for my rat rod. I'm bored of the 400hp build.

My 6.2l Detroit is better 😁

U guys talk too much..