All About The Boost! Everything You Need to Know About Diesel Boost | Power Driven Diesel

Todd, Will, and Josh discuss their thoughts on boost for your diesel engine. How much do you need for racing, towing, or dyno runs? Which turbo is best: Garrett, Holset, or Borg Warner? Our team tells you everything you need to know about diesel engine boost.
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[@lukeirmer5316]

Josh's stab at Will and Todd turbo choice was priceless. Hahaha

[@AustenARW]

Great footage, thanks for putting the boost numbers up in each clip. Fun video!

[@user-nf3oq2ge3g]

The borg Warner took it like a champion say josh haha

[@woos31]

Yessir, I could listen to the boost all day! Except the eco-bust, I think I build that much boost when I snore lmao! My wife had me wastegated with a CPAP for sleep apnea though, now I use all the air 🤣🤣🤣🤣!

[@austinwinkles8611]

That’s too funny man

[@FROSTY2588]

9:26 me screaming like a little girl when grandpas good farm truck launched HARD

[@bdjm8595]

Great video and fun to see all the different boost numbers in varying situations! I was hoping you would talk about air density but maybe in the future. A lot of folks don't understand how all that works together.

[@monsterram6617]

8:08 I'm so doing this for my exhaust.

[@colinlawrence2186]

One more awesome video can't wait for the 4th gen development 🙋‍♂️🇬🇧

[@fascistpedant758]

It would be useful to see Mass Air Flow numbers also. MAF/boost pressure would be a good metric of the efficiency of the engine-turbocharger set-up. Thanks for the video.

[@ryanwood2599]

Awesome 😁 cannot wait for Ucc 2020 and the new 4th gen engine testing 😜

[@bigdreamsonsmallacres]

Josh is steadily becoming my favorite human being lol

[@Thepriest39]

People always talk about boost PSI but it is really about volume. I worked on gas turbine compressors that provided bleed air to start large Aircraft. It put out low PSI but a massive volume of air. To bad trucks don’t have a gauge to measure volume.

[@joesalazar770]

Always enjoy your videos keep shiny side up and the rubber on the ground😃

[@pddofficial]

Thanks, will do!

[@JohnSmith-rl3ti]

I know you guys have a lot of info on here about the p pump but could we get everything you need to know about the p pump video ? Explaining how it works, about the governor and how gov springs affect it, delivery valves and the different sizes, all the good fun stuff

[@andydave93]

LOVE THE VIDEO!

[@bermanss350]

Good video, boost and burnouts always fun till it breaks🤣🤣

[@bermanss350]

Right! I say those people ain't trying hard enough lol

[@ScottKenny1978]

If you're not breaking parts, you're not racing hard enough!

[@Izzabumminz]

Journal bearings and billet 5blades is the only way for me

[@marcushert2759]

So going back to the load vs. boost theory. How much does the load on a dyno effect the numbers? And in which way?

[@rodolfoplasencia4953]

Double like!!!

[@fc3sboy1]

So I have a theory myself. I'm a rotary guy and a Cummins fella. I actually run a much larger charger my 1.3 two rotor a Garrett g42-1450 then the24v which is on a s475 over a 363 as the truck could not light the 475 as a single easily. Now we run up to 80psi on the truck which is the 5.9 24v p pump. The car I run only 18 to 25 psi. Both engine combos run about 700 bhp . That being said my theory is running the bigest charger your engine is willing to spool at less boost because the pure volume of oxygen at a lower pressure rate is a far cooler and less pressure rate at the same or less density volume making for a safer combustion in the engine which saves on engine parts and allows a larger tuneing error window. I have proved this on the rotary using smaller and larger turbos back to back . I would have to run a lot more psi on the smaller turbo then the big turbo to net the same bhp and noted the tq curve would flat drop off sooner with the smaller chargers and the engine parts became highly stressed due to this. Now I could be way off base here. But this is something to look into as noone talks about this . Not even Mr info Gale banks

[@josephschaefer9163]

Spool time is important and weight too. Sled pulling you can have huge turbos, other racing you can't have that much or a tradeoff

[@josephschaefer9163]

For Max Dyno numbers you wanna be in the sweet spot of the turbo map, but maximizing the HP under the curve can mean a different turbo

[@JerryLee..]

Todd, I realize most of your viewers know this, but as you stated in a video long time ago: Its about mass flow rate, and boost is just a number. One engine makes the power at 50 psi, while the other needs 100 psi manifold pressure.

[@Miniaturehorseexpress]

My uncle's 96 f250 with a 444 turbo makes like 515 psig all day long and like 1,300 hp

[@augdog25]

12 psi made me so happy I want a ford now

[@connorcleveland4549]

Haha, easily the best truck in the vid

[@uglymechanics6599]

Don't waste your money on a POS Ford

[@thewanderer899]

Augustine Morales If you get ford MAKE SURE YOU DO NOT GET A 6.0 or 6.4 power stokes biggest POS it’s a terrible design and ford has decided to stop supply parts for them.

[@thewanderer899]

Augustine Morales Get an older 7.3 or something but there a heavy drinker. In that you don’t get very good mpg

[@augdog25]

@@thewanderer899 I got a 2007.5 2500 with a deleted 6.7 and injectors and turbo upgrade I drive it about 500 miles a week and a 2017 2500 I also drive 500 miles a week lol about to delet this one too big difference 21mpg to 16mpg from old to new but new isn't deleted

[@larrypeachy2391]

What type of turbo upgrade would you recommend for 07 5.9 ? Need a new turbo but im keeping stock injectors only doing tuning

[@davidweber4750]

Sorry it was the channel called banks power and he has things to learn about boost that i dont even understand but makes sence

[@02Franxx]

8:30 that had me laughing hard!

[@josephochoa8075]

Where is the intake located on the red diesel I bet it’s pulling in hot air from the engine bay

[@zoranche1]

Can we adjust the stock turbo for a little more boost?

[@ScottKenny1978]

If you want to scare someone, I know that the big Merlin v12 aircraft engines can actually survive running over 55psi of boost, in the full race application. Keep in mind that it's a 27+ liter gasoline engine. It was built to run about 30psi for 2000 hours of operation. Also, I forgot about the hyperbar engine in the French leclerc tank. Uses a small jet engine as the turbo. This works because a gas turbine engine is cooled by the air flowing through it, to the extent that fully 3/4 of the air in the exhaust is unburned. The French also dropped the compression ratio in that engine to gasoline levels, 8 or 9 to 1 because that auxillary power unit gas turbine is way bigger than the diesel in terms of airflow.

[@Br0klahoma]

Needs more boost

[@Club86]

How long do the Garrett GTX's last making that much boost?

[@JohnDoe-ud2cc]

You never mentioned how the better na and flow the engine is, the lower the boost numbers, “ less restriction”.

[@jonathan7744]

Now you're making me want to do compound turbos on my Supra.... well the motor won't like more then like 20 psi... but hey seeing 40psi spike would be cool....

[@jonathan7744]

@@pddofficial Thing is a GTX42 would spool at like... 5-6000 which makes it kinda unusable. I feel like if I could build 10-20 psi around 3k rpm and 40 near 6k would be good. I don't know all the technical parts to a compound turbo system, but It would be interesting to see it.

[@jonmeray713]

Jonathan Gardner not good at all

[@jonathan7744]

@@jonmeray713 In which way?

[@ScottKenny1978]

That 40psi spike when you shift can stall the compressor, really bad juju. Kills turbos. That's why blow-off valves exist. Though instead of blowing off into the atmosphere, you can blow off into the turbo intake. More complex plumbing, but Ford was doing that on the turbo Thunderbirds in the 1980s.

[@jstwatchnread8420]

Gasoline engine doesn't like too much boost compared to diesel counterparts. Considering too much pressure for air fuel mixture resulting to explosion rather than combustion that destroy or even melting the engine. Something that diesel never do because there are no air fuel mixture during compression stage, the diesel fuel injected right before combustion....

[@axman977]

So what about turbo setups for 12 valve towing/work trucks???

[@axman977]

@@pddofficial thanks, how does a K27 compare to S362? 62/65/12?

[@jackman6976]

cummins is the best Engine no cap💪💪

[@tbone707]

America 🤘

[@amynalsman9075]

لماذا بعض المحركات لا تنفث الدخان ،وو ضعف عزم ما السبب

[@davidschmidt449]

Any idea what the air temperature is from the big turbo to the small one when pulling hard?

[@ScottKenny1978]

Ugly hot. You'd need a compressor inlet temp sensor, but it'd be worth knowing for compound turbo applications.

[@cs-gj3yf]

Roughly 500-700 degrees

[@jesserasso1042]

Dam big dogs I thought I was gonna see some more acting again like last video I thought you guys were gonna keep it going, man I thought I was gonna see more funny stuff

[@greendodge98]

Todd I always thought boost was/is just a measure of restriction of airflow. Isn't that why a higher flowing head will lower boost numbers?

[@LifeRunner4000]

It is; pressure (boost, in this case) is pretty much just a definition of restriction. If there's no restriction, you won't get pressure. This is why you can run a small turbocharger at huge boost numbers and have say, 300hp, but swap to a bigger one you could reach 300hp with half the boost pressure, less restriction, higher airflow.

[@drake_24v_hawkins]

BUT (and ignore the numbers I'm gonna just throw some in to make sense out of it) if you have 100 sq ft of air. And a 6.7l engine. Say you need 50 pounds of "boost" to fit all that air in, with say 40 pounds you can only get in say 75 or 80 square ft. So you are losing 25 or so square ft of air that can be used for MO POWA BABY

[@daviddroescher]

Pushing the small turbo too far caused heat induced expansion to achieve higher psi (90% theroy) but you are stuck at 65-50% after you remove the heat, if you can. The closer you push to the turbos redline 150k ish the lower the efficiency. The larger turbo is most likely in the sweet spot 72-78% efficiency Island depending on what map you read. Turbo A = 45psi @6-700° Turbo B = 22 psi @2-300° Both move the same lbs of air , true.

[@james10739]

Dang 165psi and 220 hell my compressor takes like 5 min to get full of 120 psi

[@HomelabExtreme]

Isn't boost pressure in it self, more or less meaningless? Isn't it like specifying an engines torque without specifying RPM? I mean, 200PSI at 1000 RPM is nothing like 200PSI at 4000 RPM, so the boost number really need to be corrected for RPM, given that the amount the head flows is constant (no variable valve lift). Or am i missing something?

[@TimothyKingRealtor]

Does anyone know how much boost my 2004 Dodge 3500 3rd Gen with 5.9 Cummins is producing (stock engine)?

[@drake_24v_hawkins]

Probably 20-25 pounds. Give or take 5.

[@highmellow8071]

I have my 98 12 valve that made 42 pounds of boost. Am putting a steed speed exhaust manifold afe intake a188/220 cam timing at 17 degrees rack plug stock turbo and injectors until I get more money what can expect my get and boost to do ? Will drive pressure go down?

[@highmellow8071]

PowerDrivenDiesel thanks for info

[@bandabanderos]

I lost a couple psi with a colt stage 3 cam. More fuel equals more exhaust so generally more boost. Installing a steedspeed didn’t affect peak boost but it did make it come up quicker

[@bcbloc02]

Boost is just a brag gauge it really doesn't mean much. With the twins I have on old yellow I can crank the gates down and make 95psi, but it makes the best hp with it running about 65psi. If I could get more fuel more boost might help but it only needs 65 to clean up so that is the sweet spot. Sometimes too the boost is really just backed up drive pressure like when you make 65psi on a stock hx35 and it has 100+ pounds of drive pressure.

[@daviddroescher]

How is 28psi @57°f mesured at the head. 2000-2400 rpm 850 Egt out of Hx35/6 on a 160hp tune ve? Stock h1c/21 was 12psi@2400 1150egt. Same fuel. 1 configuration drives like a diesel of the era was expected to,the other drives more like the stout 10mpg SBC 350 I had in my 79 chevy

[@bcbloc02]

David Drescher Funny I just swapped the factory 21cm Housing on my crew cab for 12cm wastegated one to improve how it drives. It made a huge difference in driveability and low end torque. It has power right off idle now where you needed it up to 1600rpm before in order to give it any fuel. Both setups would clean up the top end so I doubt peak power changed but the area under the power curve sure did!!

[@ScottKenny1978]

Well, yeah. As you compress air it gets hotter. The air coming out of the turbo at 95psi is way hotter than the air at 65psi. Overheat the intake air and your power goes down. You want to run 95psi, get a much bigger intercooler and maybe even add a water injection system (or nitrous)

[@excaliburjeepxj]

How much is to much for a stock hx35 turbo...I'm getting around 45 psi.... at about 60% throttle ...I dont think it will take much more...

[@bcbloc02]

About 35psi. Anything more than that is just a bunch of hot air as it is off the compressor map and because the air is hot your power actually goes down as the boost goes up. I dyno tested this several years ago on an engine dyno just for fun. It was an HX35-12cm all stock 215hp engine with 370 injectors and a ground fuel plate with 20deg of timing. If we cranked the wastegate down or did the old trick and unhooked the boost signal it lost power every time.

[@chrisgulack7708]

How many smiles per gallon right Josh? 😀

[@CapeCodCNC]

When are you going to put together a 5.9 with a bigass SUPERCHARGER?

[@danielbargas3377]

Boost is just a measure of turbo ineffiency

[@brodytippet8145]

I have a 1995 12v Cummins how much boost can I get out of the stock turbo?

[@whitepowder8838]

Your flat bread isnt gonna make records

[@brodytippet8145]

longlive2smokers lane you don’t even have boost. 😂😂

[@whitepowder8838]

No if it had boost it would eat tires and twist drive lines so I opted out

[@goingofftherails9877]

How much more boost will a k27 make over a holset hx35?

[@460EFI]

The real question, is if you can spool it. A K31 is 71/88 vs the hx35 being a 56/60.

[@goingofftherails9877]

@@460EFI Yes maybe bigger injectors with a bigger turbo. Hard to figure out the balance and not be a smoke machine ?

[@460EFI]

@@goingofftherails9877 getting it to spool is a lot bigger game than just adding fuel. To really utilize a charger that big, as a single, you'll need a Steed Speed, GDP Air Boss, an intake horn, CAI, 4 or 5 inch exhaust, and some tuning, as well as probably a better cam. Let me put it this way: a K31 is a great turbo on a 12.7L Detroit.

[@460EFI]

@@goingofftherails9877, I'm apparently also retarded, because I read K27 as K31. The 27 should be fine on a stock truck. Biggest thing will be the increased exhaust flow, so you might even lose boost, but gain power.

[@goingofftherails9877]

@@460EFI Thanks . I have upgraded to 4 inch exhaust and even tried a s300 for a while. But I was always driving lightly with the skinny pedal till it got up to 1800 rpm just to keep from smoking out those behind me

[@one4x4nut]

My old 12V would make and hold 40 psi all day even empty, would also hit 1800* that poor eBay hx40....LOL

[@dixiemae5042]

Third first

[@tonyhawk8461]

I’m glad the 12psi ford got it’s 10 seconds of fame. 😂🙃

[@Hellcleaner13]

Don't you know boost is dead! MAD is the king now!

[@lorriecarrel9962]

Man..218 psi is getting serious

[@cs-gj3yf]

Super stock diesel tractors are over 400, crazy

[@matt3595]

Hahaha, ecoboost, way too quiet...STEALTHBOOST

[@freeride202]

Banks would be so MAD at you for talking about boost.

[@Miniaturehorseexpress]

Gale Banks ? Who's She ???

[@davidweber4750]

It didnt really say anything i kinda think if someone wants to learn in depth about everything boost then they might want to check out banks performance

[@davidweber4750]

@@pddofficial but they do use turbos all the time im just referencing how to tell what your boost is doing

[@JosephRedmond]

I’m surprised, I had to scroll quite a way down to find a smart by bank’s performance comment.

[@kr4dh4x0r]

Sorry, i haven't gotten past the intro yet but the goal is not to make more boost, the goal is to make more power. Boost is a measurement of restriction to air flow. A well flowing motor does not need a lot of boost to make a lot of power. Correct me if I'm wrong, but the goal is to make the most power as possible using the smallest amount of boost. Also, asking "how much boost" without knowing the characteristics of the compressor is not going to give an accurate picture either. 10psi on a small turbo flows way less air than 10psi on a large turbo. They both run 10psi, one makes WAY more power.

[@uglymechanics6599]

Almost all of these trucks looks like they're tuned like absolute shit. Puking black smoke even in full boost. Typical diesel gear heads. Other then that cool trucks. Edit: i take that back, Not cool trucks. Theres zero reason at all a diesel making 100+ PSI should be puking midnight-dark diesel all the way down the drag under full boost. Theres a reason 1500HP diesels are stuck running 9 second passes. No place for them puking diesel on the other vehicles on the track. And don't try telling me this is because of big injectors and can't be tuned out. I've been around big power diesels for years

[@colto8284]

Brandon Cody how do you fix it?

[@uglymechanics6599]

@@colto8284 The fuel needs to be turned down in the tuning. On older 12 valves this would be more difficult since they are mechanical fuel injection, but on 24 valve diesels it can be controlled in the electronics.

[@mendomotox1569]

Yeah most of the trucks in the video were mechanical injection.. they have the fuel turned up further than actually nessasary because that assures you will make maximum power. That's racing, you make the vehicle as fast as you can. Also diesel soot is barely even harmful if at all, it all settles to the ground just like ash.