Turbo School #1

We will show the math used to calculate turbo size based on your goals. This is the first episode in the Power Driven Diesel turbo series where we will dyno test many different turbos at varying power levels.

[@JC-gw3yo]

The people down at the Cummins engine plant have to be amazed how these hot rodders can make the Cummins engines make power beyond belief

[@samuelrich88]

Extremely helpful. Really a hidden gem watching your stuff, wish I had known about it several years ago

[@joshmoody9994]

You guys are awesome! I’ve called PDD several times for advice, they are always so helpful and patient. I buy their parts and they are extremely customer service oriented. Thanks PDD for all you do!

[@brianp5579]

Can you do a video on matching injectors to turbo

[@cave0bear]

I know it's been two years since this was posted, but thank you for doing this

[@larrypeachy2391]

@@pddofficial how much room is needed between the turbo and shock tower to allow for engine twist when accelerating hard ?

[@larrypeachy2391]

@@pddofficial it's stock .... I had a bd super b laying around so I'm sticking it on my 07 5.9 with second gen manifold .... only doing tunes no bigger injectors

[@bdjm8595]

This is fantastic!! Always wanted to know how to read a turbo map!!!

[@calebgodwin3224]

great video and info, but its so crazy how far yalls videos have come in 6 years 😂

[@donealable]

Thanks for putting this out here.

[@KevinsRantingAgain]

Thanks for taking the time to put these videos together.

[@timfenton2446]

How the f did I miss this! This is awesome, you're the best

[@swampdonkey5871]

Beast.. thanks brother 🤙

[@danejensen1702]

Great information

[@grumpyrhino8643]

Interesting and fun 🍎

[@Rocketmonster777]

Don't be embarrassed buddy you sure did a heck lot more than I..you lost me at the multiply .069 I believe lol I have to go back to understand what that number relates to.

[@daviddroescher]

Twins math, when?
G-550 over s362sxe

[@dmajumdar2059]

thanks for the video

[@dmajumdar2059]

@@pddofficial I like the marker+whiteboard approach. Engineering Explained does a great job of it. But he mostly focusses on petrol engines. Good to see diesel getting some attention :-)

[@calebduncan_1245]

This video helps a lot. Thanks! But where does fueling come into play on this? How would you calculate the horsepower with fuel added?

[@angie9182]

The videos you guys have are awesome!! But are there any "basic" manuals you could suggest for someone who doesn't know much,👉me👈? When the husband talks about this stuff and I listen to your YT, I'd like to know what he is talking about and help him brainstorm diagnoses. I've tried reading the dodge manual that isn't the best... anything would help. Thank you so much! 🙏👍🙆‍♀️

[@volodumurkalunyak4651]

Wrong from 25:54 Dendisfy ratio=pressure ratio/temperature ratio. Temperature ratio=T(engine intake)/T(turbo intake). For non-intercooled setup Temperature ratio=Turbo_Temperature_ratio=P.R.^(2/5)+2,5*((P.R.^(2/7)-1)*(1-efficiency)/efficiency). For intercooler setup Temperature ratio=(1-intecooler_eff)*Turbo_Temperature_ratio+intecooler_eff. For that example it comes to Temperature ratio=4^(2/5)+2,5*(4^(2/7)-1)*0,36/0,64=1,74+0,68=2,42. Dentisfy ratio will be 4/2,42=1,65. So HP=1,65*130=214,5. If there is a 70% efficient intercooler, then figures are following: Temperature ratio=2,42*0,3+0,7=1,42. So HP=130*4/1,42=366

[@ColtRice17]

Great info and video, sound quality hiccups and generally sucks. thank you. I am applying this math to turbo an NT855 CI

[@markrich3271]

I read the forums every now and then. You wouldn't beilve how often I see guys using turbos that arent properly matched. Why are you using a turbo thats capable of making 1200hp on a 600hp set of compounds.

[@monsez9516]

Where can I buy that kit ?

[@theidahomegarage8090]

Will this work for the p-pump dt466 ?

[@dieselfueled_]

Where do you find your pressure ratio number?

[@scalebuilder_sweden]

WINKLE _ Had the same tought, 4.0 just showed up....🤔

[@koricampbell9235]

so basically you have no maths for diesel engines breaking dyno
very thoughtful thanks you

[@vytautasnar6338]

how can I calculate turbo rpm? I have a back pressure and boost pressure graphs + dyno power characteristics

[@vytautasnar6338]

@@pddofficial very good. I am trying to model a compressor impeller. Perhaps you guys have some knowledge about how to choose main dimensions like exit and suction diameters? I found some info about Cordier diagram based on experimental testing results, but this method seems old and outdated..

[@awashbowler]

So who do we figure this on compound turbo trucks. Do we just use the flow map from the larger turbo?

[@markrich3271]

Austin Washburn
You use both and over lap them. The idea is you want your small turbo to light you large turbo right before the small one hits peak power. As your smaller turbo hits peak the big turbo should pick up where the small turbo left off.

[@diggLincoln]

6.4 ford lol 😂

[@jacobmoses3712]

There's no sound