4bt Cummins Ported Head Dyno & Flowbench Test 

Will. Thanks for doing this! For those of you who don't know, I am the daily driver, of this daily driver, and want to give some "real world" feedback on this vehicle. Sam and Seth did a great job building this for me. It's been to New Hampshire with a Uhaul trailer both ways once and multiple trips to PA and does really well on the highway. Always 19-20.5 mpg incl. in the WV mountains. However, this Power Driven Diesel CNC ported head puts this thing over the top. I see a noticeable difference throughout the rpm range driving this over the past week or so. Spools quicker and easier. EGTs have also dropped across the rpm range. This gave me a useable power increase I can feel. More power with less boost is always good! Just have to keep from getting a ticket now, because being an Excursion, you can cruise at 70 and not even feel it. Sam Kuntz Sr.

That torque number with that horsepower number is INSANE!!!

108 hp per cylinder. Times 4 cylinders. 434hp 4bt. 108 hp times 6 cylinders. Makes it 651 hp 6bt. Hypothetically. Just some perspective. Wow!! Awesome results.

Seth and Sam are good guys. They helped me get back on the road after my trans heat exchanger blew 1,000 miles from home. They worked way after hours and let me park my truck and camper in their lot over night.

it will be interesting to hear how it performs on the way home...

Outstanding work- more 4BTs please!

Wow, 406hp with stock cyl head! That's over 100hp/cyl!

I really enjoy it when you guys do these kind of tests. Great job thanks!!!!!

I put a '97 12v in place of the V 10 in an '02 Excursion years ago. I left it bone stock so as to save the stock Ford tranny. It wasn't the fastest thing on the road, but at 60 mph on 35s I'd get 22 mpg. That 4bt is an AWESOME powerplant! Nice job, fellas!

There’s nothing like a Cummins to make reliable power..

This was a great episode, really interesting and educational!

I love content like this....an interesting build and good modifications and in depth information. Keep more of these coming! Lots of fun.

Awesome video again will, and those guys were cool as hell. Nice build. I'm shocked at the numbers.

Great video guys 👍🏻

Really cool project… it’s nice to see a 4bt do so well

That torque number has me flabbergasted. Over 900 ft/lbs at 2,100 rpm. That sum bitch will tow whatever you want it to.

That's cool, 5+years ago I helped a buddy put a 12 valve from a tractor in his Excursion and it was sick

Love these dyno/science comparison videos

Great content

I have a 4bt in a F150 with a similar 4bt setup, a self ported head, P pump, Hx 30 over Hx35 compound, the same Colt cam, Stage 2 injectors with 035 pump valves. I can see 50+ boost with only a small puff of smoke off the line. No smoke under load when its warm. I was shocked at the HP numbers produced by the Kuntz Bro Excersion. Good job guys!! I am also considering the ported head.....

Great video, honest presentation. I appreciated it! If you are looking for a ve pump 4bt truck to work on next year, let me know...

Love the video!!!! You earned a new subscriber 😊

Fun video thank you.

Will that was an awesome video I'm really interested i head mods what works and what doesn't keep these awesome video coming take care and God bless you and stay safe 🙋‍♂️ 🇬🇧

This single video makes me want a 4BT

Lotsa sauce and still plenty of room under the hood for activities with a 4 banger! Cool swap guys, I need one as my family hauler

👍🏽👍🏽 love the 4bt’s

bread truck for the win. that announcers job is awesome.

I need this for my excursion!

I have been building my 4bt 1964 Dodge W300 power wagon with the VE pump hoping for 200+hp with the way I set it up. My son and I hope to have this truck done by the end of August we hope. Videos like these always inspire us to keep going😊

Thank You So Doing This 4 BT F150 f the 3v 5.4 too

I wish you all would have the camera outside or a picture in picture showing the exhaust during the dyno pulls so we could see what kind of difference it made.

Nice, I've got a little 4bt with an a pump in my f150. Haven't modded it at because it gets 32 to 36 mpg in town!

The power that little 4BT makes is crazy! And with killer fuel economy

The engine’s running more efficiently now, I’m sure the fuel mileage is better too

We need an update on the MPGs on the way home !!!

That’s awesome! I drive a UPS truck (the very long ones called “1300 step van”) with a Mercedes 4 cylinder Turbo Diesel (4.2 liter I believe) and I get 25mpg loaded with 15k lbs of packages in the city. 4bts are much more simple engines, than the Mercedes “O” series.

Imagine getting absolutly wiped by a box truck

That thing made 960 ft lbs of torque!!! Sheeshhh!!

I need to do this to mine

Did I miss the injector upgraded sizes.? Great video and I learnt something lol

Im sure its been done, but you guys should do a 4 valve head swap with one of your 24v conversion kits.

I have a 1963 Willy's Jeep Wagoneer that I'm thinking about converting to the 4bt. Have some body work to do on it first. Just got it home this past May. Been sitting at my parents house since I bought it in high school for $100 because the previous owner had broken a shifting fork. Dad and I fixed that and had it running.

That thing is rowdy.

Always thought the 4BT was underappreciated. Would love to have a daily with one.

Would love to see more 4bt content

Man I wanna do this to my suburban

Ain’t ever seen a bread truck move like that before.

Wow I like to have a truck like that pretty nice

Absolute Pressure in Utah is like 11.9 right? So at peak boost (54.4) that single was humming at a PR of 5.57. I’d be interested in how that setup behaves down at sea level.

Video changed my mind about a 4bt swap in my 96 f250 lol

Hopefully these guys regeared the truck so they can have a cruise speed of 66-70mph at 1500-1600 rpms. That big mfr could probably see 30+ mpg if it was geared for it. They're probably producing 550-600 ft#'s at 1600 but their trans or differential gearing is working against them.

Ford really blew it on not hooking up with Cummins. Oh well, with guys like PDD, I am sure their will be great swaps

i allways wondered why the 4bt engines were so heavy.appearently cummins made sure the bottom end was bulletproof for industrial use longevity.am sure that engine would be loads of fun in a old ranger.could run 12's while getting 30 mpg.

Just curious?? What transmission are they running? What harmonic balancer??? What pump modifications??

Really loved the show. I really want to know how you dealt with the gasser computer mating, and the tranny shifting differences... That is my concern when thinking of swapping my 5.4L "T-crap" for a mostly stock 4bt.

what about end exh manifold difference before and after ??

I'm getting parts together to build an engine like that for my 2000 F150 4x4

I want to know what the background music was during the head swap scene?

Curious if another engines p pump can be adapted to an early 4bta ?

What kind of mpg are you getting with normal driving + AC running?

Gee whiz Will, where's the charger project??? Great project and job though.. I haven't forgot

I do find it funny it took 2 of you to get that head around I throw 6bt heads fully dressed with manifold and turbo around like nothing and I'm only 170

One of these days you guys should test an intake horn ive always been curious if they actually help or if its just a Gimmick

I need this engine in my f150

I skipped around to see the results. What else was done to this engine before? Injectors, turbo?

8:30 Ouch, get yourself a set of 3/8 impact sockets. The ones from Gearwrench are affordable.

would love to put this in my super duty. i wonder how coolant tempts would hold when towing though

I live in Texas and can only find 4bts in Florida or other states?????

Up here in Wisconsin we got a 4bt in a minirod pulling tractor with a single hx55 no intercooler or aftercooler but we are running water injection and we're sitting around 700hp

435hp 963Tq 25:29

For an SUV that is pretty much an f250 I think a 5.9 would be good to use

Anytime volume increases boost drops, but it’s still more flow. The numbers prove that. That’s why I don’t listen when people talk boost. What’s your volume, lol.

Ya its stock , ya just a clean up , ya light port work , ya I know how to port I may have....

FUUUUUUUUUUUDDDGGEE!!! Maybe I shoulda gone with a 4 instead of a 6 for my HMMWV swap??!!??

i know i knew seths face. he was in diesel power challenge.

Holy shit.

I'm surprised you didn't talk about drive pressure .

That is an impressive build. I've seen a couple Excursions with a 5.9L Cummins swap. I've always been curious how it would work with a 4BT as far as mileage and power. It looks very capable to me. Should be a great family cruising tow rig. Curious if they did anything to the transmission. Is that still the stock Ford automatic? Thank you for sharing.

What transmission are they running in that excursion? I might have to do a 4bt swap

Can you do a cost breakdown?

👍👍

👍💪

that's the best thing that happened to that ford (Cummins) powerjoke trash gone by by

I’m still curious about the choice to do 4bt instead of a 5.9. Just because? That’s good enough, I suppose. Fuel mileage? I got 26 hand calculated in my 2003 Ram 2500, and that was going around 75 on the highway. Conditions were really good, but still, I always got good mpg in that truck, and everything was stock.

Oh man I want to pull the 4bt out of my skytrak and boost it up. Can anyone tell me how you use a 6 piston p. Pump on a 4 cylinder cummins?

And still running grid heater and stock charge pipe 😂 theres more power everywhere. Throw some 5” exhaust on that thing and let it breathe

Curious, what transmission was used with the 4BT in the Ford Excursion?

Did they use the stock Ford transmission?

What transmission is it using?

Get video will I was going ask Josh why you and Todd haven't posted any video of your trucks enjoy watching them even the sales give aways keep on dieseling

Yikes, rock tumbler under the hood.

What were the stock torque numbers ?

What kinda intercooler?

But all the diesel kids tell me they get 25 + mpg

So right on those VE pumps being hot garbage

What injetors size and cc into ppump?

😎🇺🇸🍺

Hmmm. Build another one with a built Mercedes OM606 and compare them.

I no guys pulling 25mpg with their 6bt...