The ULTIMATE GUIDE To Maxing Out A Turbo! [Compressor Maps Explained, Speed Gauge Install]

[@TheCarPassionChannel]

I want to make it ***VERY CLEAR*** that any time I say "pound of air" in this video, I'm referring to the mass flow rate of "X" pounds of air per minute. NOT "X" psi of boost. Also, I messed up a bit on the time stamps, here are accurate links: 1:50 How to Read a Compressor Map 16:18 How to Install a Turbo Speed Gauge 20:26 How to Hook Sensors up to Megasquirt 22:45 Test Pulls 24:03 Analyzing Surge 29:50 Making More Boost 31:36 Analyzing Choke 34:21 Trying to Overspin The Turbo (Myth?)

[@michaelbull6906]

Been waiting for this video forever, awesome video man

[@matthewbican6600]

I liked the comment about 18psi I am spending way too much time on that site and on your channel. I want to do something very similar to your car for track use. Keep up the great work.

[@braydoncoate]

PIN THE COMMENT GREG

[@TheCarPassionChannel]

@@braydoncoate weird, it came unpinned

[@braydoncoate]

@@TheCarPassionChannel understandable 👍

[@DeffectiveMirrors]

The data you provide is underrated man. For the amount of effort you’ve put in it’s sad you don’t have as much recognition as the you tubers with all the flashy cars.

[@Bad_handle]

+1

[@ross.dot.e569]

100%

[@Nebbia_affaraccimiei]

and THIS my friends is why I've been subscribed for so long! sweet sweet technical content explained for dummies!

[@Huwberts_Emporium]

420hp to the wheels in a Miata must feel like 700hp in a new car.

[@TheCarPassionChannel]

It's about as fast as a 700hp Hellcat in terms of roll-on acceleration. But it feels like about 3000hp in a car made of tin foil and bubble gum

[@jefftoonstra5087]

TheCarPassionChannel will you ever get a chance to drag race one? The only ‘ stang to give you trouble now is the new 500 😎

[@TheMaroth]

@@jefftoonstra5087 Not realy. If that boat with that much Power and so much traction barely beats the Miata on 0-60 (3.5 Seconds) 60-120 will be roughly 8 seconds due power to weight. 0-120 the miata easly wins.

[@PistonsAndPetrol]

I listened and bought an NA Miata. Thanks dad.

[@Nebbia_affaraccimiei]

about time!

[@ayynuk]

samee. Bought one last week

[@philjones5728]

Greg, this is without doubt THE BEST turbo compressor map video. A perfect real-world explanation (with actual data - no bluffing or fudging figures). It was even better than Brett's video, from GFB, on the MCM channel. Simply brilliant. Thank you. (Huh.....how can anyone give this video a thumbs down? Shame on you!)

[@themmiatadays176]

Did I just watch a tv show long TheCarPassionChannle video... yep and I enjoyed every second 🤙

[@mtbiata]

I have no idea what any of this means but I'm still interested lol.

[@Thee_Sinner]

Turbo spinny ok go fast

[@dougsfan9984]

On same boat

[@john-martin]

Up down turn around jump clap. Up down turn around jump clap

[@usafsmoky1080]

This is an incredible service. Sitting with a turbo’d NA that I built along side your videos, you’ve got the motherload of content that I bet other cars platforms wish they had.

[@PANTYEATR1]

finally, an understandable explanation on how to read a surge map. thanks so much bro.💪

[@jannevot8515]

13:49 I smashed the like button so hard I broke my screen. Thanks for the content Greg.

[@234Nick]

Craig and Craig is the most under-rated auto team on youtubes.

[@mikespencer9913]

Making the complex understandable! Bravo, Greg!

[@edwardbusbin9847]

Loved the longer technical side of it, keep it up man!

[@khawajadotd]

I just learned SO MUCH. Would love to keep seeing in depth technical stuff

[@SuperDizzy13]

I could watch these videos all day lol. Very informative and also fun. Hands down my fave KZbinr 👌

[@madmiata1887]

Came back to watch again after a few months. Great job simplifying the fancy engineering stuff. My brain has a hard time comprehending engineering technical documents. You made it easy. Thanks man!

[@mtbiata]

Man I've been binge watching pretty much all your videos lately and I'm so happy to see a new upload! Keep up the great work Greg!

[@z_855turboR]

13min of technical content.....and I promise you..we are gonna install..the flux-capacitor on a miata..and see...... Killer! :) This was insane, good explaining skills and the passion

[@reecelee1088]

I watch KZbin all day everyday and this man is my favorite. I loose it when I see Miata dad with a new video!

[@rokudrifter]

you just answered something that I think about everytime I consider turbo. driving two hours to get it tuned without the turbo plumbed.

[@pontiacg445]

Thanks Greg! Also, pretty sure you can wire the frequency output of the BW sensor up to pt4 on a MS3x, it has an option to use hardware timers on the main processor, so it should manage to read 160K from a 6258 no problem. 0-5V only. Little to no documentation on it though, about to try it myself. Or, you can also wire it to MAF input on maybe any MS3 and config it as a frequency MAF and do some math on the datalogs after the fact. No need to actually run MAF, you can just log it's frequency.

[@slandon1977]

I was thinking the same thing.

[@pontiacg445]

I wired up the EFR speed sensor direct to PT4, configured for high speed input 1.75 teeth/rev on my MS3x. Seems to work fine. It quits reading around 2K RPM and I haven't maxed it out at 140K+ RPM yet either, around 1/10s update rate could be better but still plenty workable. I log a MAF while running SD and it's still working fine too. Going to make a frequency generator and send a fixed signal just to make sure I'm getting correct data and see where it caps out.

[@JAWGolfinguitarist]

This is a fantastic video. I don't think it's "overly technical" at all. You do a really good job of explaining concepts and then exhibiting data to show what you mean without getting lost in the weeds. Your videos are more useful than my engineering degree when it comes to a lot of this stuff. Super interested in an rpm-variable boost video.

[@vsilvanivs]

Man.. your content is way better than tons of other youtubers's! Keep on! Your car and project is a total "boost" for myself!

[@4399daniel]

I’ve literally sat in engineer lectures and I’ve never had such a quality of knowledge and data provided. Outstanding! 👏👏👏

[@1987RX7TII]

I’m subscribed to tons of car channels and none of them make me half as excited as I get when I see activity from this channel.

[@802Garage]

Great video man. Covered a lot of ground here in an easy to digest way. Really demonstrated how beastly the EFR is too. Love the Southern Hooning shirt. That's a throwback. As for the over spin, I think it's that whole shop vac concept. It actually spins faster when there is a restriction. I forget the exact physics law, something something stall. You get dangerous overspeed when the car is under heavy load and a boost pipe suddenly blows though, I believe.

[@Hartbreak1]

Now I finally understand compressor maps, every time I went into a forum trying to grasp the concept I was welcomed with comments with more mathematical and technical jargon than a Apollo mission to the moon. Now I need to understand the exhaust side of the turbo 😂

[@jrgoldbach]

I really like the presentation of this video as compared to many of your previous videos. Keep up the great work!

[@blago6]

Hands down the best explaining and favorite car stuff channel i am watcing your videos since the "garden hose" times and man does you upload quality stuff keep it up Greg i wish some day i meet you.

[@pisgahwrestler119]

I loved this video. We have a running joke at my job "pumps don't make pressure" because people don't understand flow vs pressure. Thank you for an awesome video!

[@ThisMarv]

Been watching for years and can't believe you still only have 105k subs and I've been trying to find a patreon or something to support you (other than the shop). Insane information, both in video and on your website. I didn't have a Miata for 2-3 years for personal reasons and I don't think I would've bought one again just now without your channel. 5/7 would pump money into Craig/Kreg/Grag/or any other variation if you had a patreon

[@isaacfarmer7138]

My man Greg out here like engineering explained. Love the amount of knowledge this guy just has sitting in his mind

[@al123j]

Epic video, love the more detailed format.... You are going to end up getting less power to weight ratio if you keep adding sensors 😂

[@FiveFiveGarage]

Vids like this make me excited to put my car back together. Its like a rolling science experiment! I want to put sensors on everything! This info would have been cool to see back when you swapped compressor wheels on the old build. Time to start shopping for an EFR 6258 😂

[@yp360]

I want more technical and long videos like this. Very informative and very entertaining. Thank you so much

[@austingrimm2996]

Loved, loved, loved this video. The way you break concepts down into edible chunks and deliver fantastic entertainment is why you're the best dad on youtube 😁

[@dgugge7]

This is easily one of the best videos out there describing compressor surge and compressor maps in general using all the measuring equipment you would want to know the "whole" story. Big props for that! I'm driving the same engine with the same turbo and your setup is making the same sounds as mine when at full throttle and around 4500rpm (23:10 and 23:25). Its a short whistling sound in the video which can be longer if in a higher gear. I always was worried this is surging. But obviously it is not. Thanks for showing that! Do you have an idea where that whistling sound is coming from?

[@slayerxi]

The 18psi comment was a gem! Great work Craig, keep it up my dude!

[@beagle055]

Man alive. You have become a scientist! Nice work!!!!! I’ll have to watch this a few more times to digest it. Awesome content!

[@danconzett4734]

This is really good stuff! As an engineer I really enjoy these in depth technical videos. I hope to see more in the future! Keep it up!

[@JDARJISJ]

You are a great educator. This format is great for you.

[@cdsprech]

Did I miss a video where you changed shifters? Love the content here Greg, you present so much technical info in such an easy to digest way. Keep it up!

[@Nasonix2]

It's a bmw shifter if I'm not mistaken. He did a video about it maybe early or middle of last year is my guess

[@decamun]

This might be my favorite video I've seen of yours. Love the technical depth. I learned a lot :)

[@feelthatfeelthat]

This guys amazing. Love your videos bud. Also huge thumbs up for repping speed academy!

[@dutchdreammiatabuild8808]

Awesome video on the more technical side of things. Eventhough I'm an N/A guy for now, I really loved it man!

[@fernandohood5542]

Yes you can with out watching the ending of the video. Excellent turbo selection.

[@daleabono3616]

You spun my brain right up to the choke line. Luv'n it. Thank you.

[@TheOnlyToblin]

Peak nerdiness. Good shit. Thanks for this Crai....Greg! I definitely enjoy these technical videos! Even though I'm supercharging my car for low-end oomph rather than high end zoom-zoom (even sporting that Broke&Boosted sticker) this is hella interesting and useful!

[@mrmohr2]

@TheCarPassionChannel I suspect that with the turbo disconnected (Running NA) not nearly as much air flow is passing in, and therefore Out of the head and into the turbine side of the turbo. So, there just isn't enough air to spin it up to 168k rpm. Super big thanks for all the research you have done, and more importantly, summarizing it so that we who are not quite as bright, can understand. I have looked at turbo pressure maps before, but had no idea what they meant. Now, to get more than 210hp from my garrett SR20DET...

[@MrJasons9]

Love these longer more technical videos, Keep up the great work man !

[@ReubenHorner]

Nice one brother. Interesting topics, I don't know much about it haha. I do have a mate who overspun his Borg and it blew up haha. He went up a couple of sizes and now runs a speed sensor for safety. He was simply making more power than the turbo was rated to

[@miatasman9594]

Currently searching turbo sizes to replace a 2554r on a 1.6, Cram all the knowledge in my skull miata dad Love this video hopefully more technical videos to come

[@MarcelTM]

Excellent explanation! Love the "every day astronaut " Tshirt...

[@facamary]

Keep them coming Mr. Peters! Amazing videos...

[@SonnyRao]

Awesome video! Been researching turbos and compressor maps, and I was a bit confused about the hp to flow thing and your videos really explained all of it so well. I think I'll also buy a speed sensor for science :-)

[@xm5296]

I thought this was TheCarPassionChannel? or is it TheCarPassionChannelxEngineeringExplained? Down with either!!

[@Nasonix2]

It's the car engineering passion channel explained. Duh

[@trunksbriefs8434]

Name a better duo than Greg and Craig, wou guys rock 😍

[@GTFour]

Fantastic video. I’ve over spun a Turbo already running near its limit that then had a slight charge pipe boost leak. It’s to do with the engine load like you saw with the street vs dyno logging. Something else for you to test/prove!

[@victorivansson3247]

Long Technical video approved, definitly want more!!!

[@realweston]

yes i absolutely loved the shared knowledge, although its not something i want to watch while im laying in bed trying to sleep. because now my mind is racing with the possibilities! man i cant want for my turbo so i can also " keep on boosting"

[@taion9836]

Really good stuff, thanks! I much prefer learning through your technical video than angry forum posts!

[@adriantaylor9535]

Excellent presentation, easy to understand and useful data. 👍👍👍

[@jeremeyparks3411]

I think without the extra lbs/m being forced in the intake from muh turbo, there's simply not enough exhaust energy to overspin a properly sized turbo.

[@TheCarPassionChannel]

I think even if the turbo was smaller it still wouldn't overspin, because their max RPM is so much higher. Like 220,000+ for some of them

[@thomasd5248]

so about that 30psi in the mid range.. also, have you thought about doing a 1/2 mile or standing mile event?

[@vkotis]

Great editing, tons of info...you should have so many more subscribers. I’ve been subbed for a while now and your vids have helped me throughout the years. I always look forward to a new video.

[@supercarmio]

frikin awesome video man, loved the in-depth analysis and data. and of course all the bttf references ;)

[@TurbineResearch]

All of the internets compressor map overlords have been triggered and will now bombard the comments haha

[@kingbryant5673]

Man I love that intro with a passion. Also was that a compound set up for a 2v Cummins

[@fireonmytarget8937]

I watched this a few months back and had a hard time w all the terms. I have been reading maximum boost by corky bell and now this video is way more fun to watch.

[@chippyjohn1]

You can also map via inlet vs outlet temp.

[@vasek987]

overspinning topic: If you don't use compressor like you did, there is less airflow compared to when the engine is charged so overspinning can't happen. It could happen in case you completely removed compressor rotor - there won't be any appiance which would use power generated by the turbine. But this is not the case. You are still spinning compressor wheel which is powered by the turbine and you are compressing air and blowing it back to the atmosphere. And yeah setup you tested for overspin did propably about 120-130hp because of that added extra „restriction in exhaust“ ;)

[@karlkiernan6863]

This video was very helpful as I have not found much info on the BW turbo RPM gauge. Thanks.

[@lordflufffluff]

I love this channel so much. I want to modify an ND Miata now.

[@jayvee8948]

Thank you so much for this great video explanation. It’s making me want to enjoy my fluid mechanics & thermodynamics class more than I want to.

[@niccolomendoza7382]

Very thorough, well explained! Thank you Greg!

[@johnsumrall6310]

Such high quality, I love the really detailed and technical videos

[@Bozemanjustin]

26:35 If you're losing more PSI through the intercooler, that is a good thing because that means you're losing heat Manifold air density is the name of the game. Pounds of boost means nothing. Normally to double the horsepower you need at least 14.7 psi additional air at ambient temperature However, the guy that invented nitrous oxide systems, has invented cold air supercharging, where they just compress normal air, but into a tank, then when you're ready to use it, for a quarter mile run, you just run off this pressurized tank. The air is coming in at 10 lb of boost which technically shouldn't double your horsepower except it's coming in at - 100° f. And therefore, because it's more dense, it doubles the horsepower at 10 lb instead of at nearly 15, not to mention almost no chance of detonation with temperatures that cold

[@TheCarPassionChannel]

Yes pounds of boost does not equal power as mentioned at 3:57. However PSI is how you measure intercooler pressure drop. Significant pressure drop across the intercooler means it's too restrictive. 1-1.5psi is the maximum you want otherwise you're not using the right intercooler for your application. High pressure drop is not desirable. PSI can also be used to measure compressor pressure ratio to help plot your setup on the map to determine efficiency

[@livin4dasnow]

I love this series!!! Greg you're the best at making things easily accessible and giving a good foundation to learn from. Love your channel, helped me start learning how to boost my Miata!

[@fl_interception]

You have to simulat the overspeen the turbo with a small leak! Because you need the strength off the engine to speen the turbo, but the leak for the turbo to spool up and over spean

[@seanday6127]

Good video. I like the deep dive videos and you did well.

[@harrisdoesthings]

I don't have an MX5 anymore, but I still watch Craig's videossss xoxoxooxx

[@TankRust]

Great video Greg! As a fellow Miata nerd, I really appreciate the time and effort you put into this. Thanks for putting out such great content!

[@TheSkattin]

Dude this video is seriously so amazing

[@shinobi1203]

Talk about a knowledge bomb!! Thanks for your research miata dad!!

[@lepystudio8974]

Your data is somehow "scientific" and i would approve it as a scientific experiment regarding to airflow. Very educative video too, enjoyed! Keep up!

[@mattgiles4980]

the low turbo rpm makes sense because the motor is not making that much power. less exhaust flow less rpm. more vids please.

[@XCSEDAN]

Awesome vid dude... really well done. Now... lets see how efficient your intercooler and intake system is... Add a map pre intercooler then post intercooler but pre throttlebody. It'll isolate where your limiting factors are. Fantastic chanel man, good on you for schooling people. Also high boost in the mid-rang then tampering it off.. guess how modern high performance turbo cars work? (Ie GTI, S3, 1205i etc) Boom. You got it baby! Make the turbo work in its most efficient range constantly. Makes for an efficient engine.

[@charlesmcgehee3227]

Ferocious. Nice work and great schoolin'. Thanks Greg Peters....

[@shawnroxby3257]

This is so interesting and informative! Bravo

[@arturo762]

Our boy dropping knowledge on them foos

[@Dystyrbed]

Dig the technical details, man. Still need to get you a video of my crappy flatland riding. :-)

[@thefailxtreme]

I love the more technical videos, very interesting :)

[@n14m0R34]

Nice technical video and stupid yet very informative tests, I wish there was more like these. I just wanna give you some additional food for thought. In your plotting you assumed the pressure ratio by having 14.5PSI of absolute pressure ie 0 restriction air filter and induction pipe. I can't tell for the induction pipe because I haven't done that yet but what I can tell is that even aftermarket air filter does restrict airflow. Not that much in my case, usually 0.2 to 0.5 psi but still, it moves the pressure ratio. Especially with restrictive/dirty air filter, once the pressure drop in front of the turbo PR moves up fast. It might be also interesting to hook up a third MAP sensor (yet another analog in needed) in front of the turbo to really calculate the PR seen by the compressor. Some industrial engine have sensor at the back of the airbox to indicate air filter blockage from dust, that read up to 1.5 PSI of vaccum to get a more precise measurement rather than having a 1b MAP sensor used at most on a tenth of its full scale.

[@nice1149ss]

That was a great online lesson for my upcoming test for API source inspector for rotating equipment

[@jacobrider2143]

So pumped for another vid

[@cre8tivegarage157]

have to say this helped me understand a lot more thanks

[@Rekinortiher]

Awesome video. Very informative. Learned a lot. Thanks.

[@indopleaser]

like this type of video. something new, and technical with measurements. get that thing in the wind tunnel and go full time attack

[@joshuaphelps322]

This video is a gold mine