Al and Woody , I really hope you guys realise how good of a show you have.
@aSinisterKiid
6 жыл бұрын
*realize
@joejacobsen6822
6 жыл бұрын
I could watch it all day!
@eziitis8
6 жыл бұрын
realise* - depending on the parts of the world you live in, for example in the UK for a lot of words S's replace Z's. You ought to look up localisations of words next time before you "correct" a correct spelling.
@EvanMoon
6 жыл бұрын
What makes this so good is this is people telling you what you need to know and how to build things instead of acting and get you to buy product from a sponsor.
@RSPDiver
6 жыл бұрын
Anyone else think Al largely says “Stuff the internet!”
@guusbouwmans5667
6 жыл бұрын
Al is becoming such a good presenter!!!
@ShadyVectors
6 жыл бұрын
This, x100.
@tommurray8312
6 жыл бұрын
a word from a clever professional is well worth your time listening too.
@guusbouwmans5667
6 жыл бұрын
@@tommurray8312 couldn't agree with you more Tom. That's why I usually listen twice haha.
@802Garage
6 жыл бұрын
I was thinking the same thing.
@upgradeNEVER
6 жыл бұрын
He is! He's getting much more comfortable in front of a camera. He still is good ol' Al though
@rickjames3034
6 жыл бұрын
"People mess around with old junk engines all the time... It's a sickness" Shout out to all the toyota 4K family
@_Erogaki
6 жыл бұрын
Takes effort to destroy that engine lol
@thepeas
6 жыл бұрын
3S** family :P
@Piotr94L
6 жыл бұрын
JZ family
@AusPokeJack
6 жыл бұрын
Pietrek L never
@tcollogan
6 жыл бұрын
302* cam big lift 110* lobe seperation, solid roller lifters, roller rockers, bored out to 1550cc, 12:1 comp, LS1 coils, twin dcoe 45 Webber's, 130hp................ Not worth the effort
@markrent3269
6 жыл бұрын
30 minutes, no shit just straight talk from someone who knows what he is taking about. Cheers
@jacobsavage9942
6 жыл бұрын
"Its bigger then it looks" - my favorite al line
@CaptainLowside
6 жыл бұрын
I already had a fairly solid understanding of compound turbos but Al's explanation is just so simple and straightforward! Love it. Makes me want my own setup! I like AC though so it's not gonna happen..
@foureye7058
6 жыл бұрын
Wonder if he'll do sequential next...
@bgdwiepp
6 жыл бұрын
turbo yoda talking turbos with two turbos, one turbo turboing another turbo!
@markm0000
6 жыл бұрын
bgdwiepp drinking game every time Al says turbo
@gp-vl3gk
6 жыл бұрын
i ran out of lemon lemon squash ;)
@PorcupinePunched
6 жыл бұрын
Mark M send help, I got alcohol poisoning
@Phrew
6 жыл бұрын
yo, dawg...
@jimhiscott2918
4 жыл бұрын
Many places in Australia have limited resources for fabrication. That's what makes them so creative. Give this man a job and I guarantee you one way or the other he's going to get it done! Good on ya mate, cheers
@GavinY
6 жыл бұрын
Knowledge is pow...TORQUE Compound turbocharger is exactly as a gas turbine engine, hot side exhaust go through small blades first , then expand through bigger blades to recover more energy. On cold side air gets compressed by big compressor blades first then smaller compressor blades the closer it gets to the combustion cans. Exactly like compound turbo , hot side small turbine to big turbine. Cold side big turbo then small turbo
@msengineeringdavid3702
6 жыл бұрын
Except it's not called turbo compounding but staged turbocharging.
@Rollin8.0
4 жыл бұрын
@@msengineeringdavid3702 are you talking about gas turbines or turbochargers? Because in turbocharging 'staged' and 'compound' are two different things.
@andyharman3022
4 жыл бұрын
I love compound turbos! The tractor pull guys have been doing them for a long time, and really have some extreme setups. The one I remember most was on an International 466 that had 4 turbos in 3 stages. Two in parallel, blowing into stage 2, then blowing into stage 3. He said it made 240 psi boost. Not an intercooler in sight. So I asked him why he didn't have an intercooler, then he said "it's the pressure that makes the horsepower." So I went home and did the math, and figured out that his intake manifold temperature would be 1000F. He could have gotten the same intake manifold air density with two-stage turbos and a good intercooler. And he wouldn't have been changing engine blocks every 20 passes.
@blahblahblahblah2837
5 жыл бұрын
Look at him! He cant stop himself from smiling. He's right in his element. Love it
@frederickthorne2496
6 жыл бұрын
..it's a sickness - yeah nah yeah
@jaxquill
6 жыл бұрын
Nah yeah, it is. I am Aussie & this makes perfect sense, to most ppl here.
@Rollin8.0
4 жыл бұрын
SOHC 4 Litre 4 lyfe!
@raspberrywatkins
6 жыл бұрын
Boys.... I would be really interested in watch the dyno of the compound turbo set... It would great to see how the tuner uses the 3 controls and what issues are thrown up. Another nice episode
@curvs4me
3 жыл бұрын
Great explanation!! The triples are for exceeding 100-150psi. Crazy boost land. The fastest 4 cylinder is a trip compound Aussie rig I believe.
@justRD1
5 жыл бұрын
If you want the setup to really make power then you need some form of intercooling between the two stages.
@user-nf3oq2ge3g
3 ай бұрын
Compounds are probably the hardest to tune, making the transition smooth is double the tablespoon have to modify basically. When tuned correctly it can drive like stock and be a monster, my Cummins runs compounds and now limited by fuel… it tows like tug boat, it’s a beast, and being able to have the air for your engine is awesome. The Cummins guys run compound just like this but they run triples just for the dyno numbers, but you will notice when they sled pull, the run compound, or just one big single cuz your literally pegged, those big singles though take nitrous to spool the turbo but the triple doesn’t need nitrous to spool. Because the primary turbo helps, but you will be limited in dyno numbers overall on a compound your power band will be 5,000 rpm of usable driving instead of spooling up at 4400 rpm on a Cummins and using 1500 rpm of usable power.
@johnparrish9215
5 жыл бұрын
Al, have you guys ever considered mounting the external wastegate on the outer portion of the Turbine housing??? The net result is you (if you installed in the right place) increase the turbine size at the same time you bleed off boost. Make sure you mount it at an angle so the turbine gasses don't make a sharp turn. The turbine housing is cast steel not iron, so it welds easy.
@harrisondodge6956
3 жыл бұрын
With the setup shown in this video, there's no wastegate dumping to atmosphere. Every kilo of air that enters the exhaust manifold is going full speed ahead through that secondary turbo. I get it, works great on a diesel application, but gasoline/E85 applications require any excess of energy to be dumped to atmosphere in order to keep the boost in check. By using an exhaust manifold reference for the primary turbo wastegate and using an intake manifold runner reference for the secondary turbo wastegate, we can both keep backpressure under control across the entire spool range and rev-range; and we can also control boost in a linear fashion without dips in the curve. Your backpressure and boost curves would look like a flat line after 3000RPM because everything would be set mechanically in a controlled fashion. Even if you wanted to rev it to 9000RPM, you would still have the possibility of seeing 30lbs of boost from 3000 RPM to 9000 RPM, and that makes a damn fun and damn efficient street car and effective race car.
@Prizzo85
Жыл бұрын
I'm running this exact setup on mine. It's frigging awesome. Would never go back to a single setup. Both turbos work brilliant together. 👌
@numinous4789
6 жыл бұрын
The real benefit amounts to lower boost threshold and lag minimization, but the cost, complexity, weight, and space required for compound (i.e., sequential) setups is such that many people choose to go the single-turbo route.
@compted10
6 жыл бұрын
The reason you would want to go to triple turbo setups is to allow for better spooling speed vs one very large atmospheric charger. It also allows for lower smoke output on the street during transient throttle on non emissions diesels making above about 1000hp while making throttle more like a factory truck.
@brodiescott2728
4 жыл бұрын
secondary turbo should be 25% larger in: a) CFM, b) compressor "size", c) turbine "size" or just a happy medium between all 3?
@300kwv6
4 жыл бұрын
Good question, I was wondering the same thing.
@corky9127
6 жыл бұрын
I think we've just reached peak Skid Factory! This was the most interesting and informative episode to date in my opinion. Unbelievable stuff guys.
@WhoThisGuy515
6 жыл бұрын
First off i know very little about diesel turbo engines, but i'm glad i watched this video. I was always under the impression that compounding meant that the small turbo was on the manifold then feed the larger turbo with the pressured fresh air (or what would usually go to the TB).
@100pyatt
5 жыл бұрын
Don't forget that at high boost pressure your dynamic timing is significantly advanced.... You also need to shorten the length of time the fuel pulse is occurring and the only way to get the correct volume in a short time frame is larger injectors
@justinmcintosh2330
4 жыл бұрын
I believe the reason why they are now using 2 turbos as the secondary instead of one is because it fixes what you said about it takes more time to build boost having one large turbo as your secondary. By having two smaller turbos for the secondary, when your building RPM's you can direct the air thru one of the smaller secondary turbos to quicker reach it's maximum range of boost efficiency quicker than the increasing exhaust gas can be used to reach the primary range of efficiency for the 2nd smaller turbo, thus making the system as a whole work more efficiently.
@mopower9844
6 жыл бұрын
One of the best explanations of compound turbos ever explained by a bloke that works on petrol cars
@mwangikanyoro8790
6 жыл бұрын
We also watch from Africa..
@SODMGIBO
6 жыл бұрын
Mwangi Kanyoro tuko ndani ndani ndani
@megasoctopuslegionofcake6248
6 жыл бұрын
Do a 'my town' for the Unicorn circuit!
@gruntabro1
6 жыл бұрын
Where in africa bro
@gabrielhespanholdossantos8738
5 жыл бұрын
I am in Angola 🇦🇴 and love your channel
@gruntabro1
6 жыл бұрын
Turbo compounding is acheived by using exhaust gases exiting the first turbocharger unit to drive a second smaller turbine thats connected to the crank shaft by a set of gears or through a hydrodynamic unit
@mickyd824
5 жыл бұрын
Great stuff guys! Just some useless info, the original compound turbo charger was a complicated set up that was used on radial aircraft engines like the engine in the super constellation, it was coupled directly to the crankshaft through a weird clutch set up ie; not used for boost but introduced more torque directly to the crank.....
@FirePoo
4 жыл бұрын
I have a genuine question for turbo Yoda. I (thought) I understood the basics on how turbos work. For this compound setup, I understand that both turbos use the exhaust gasses to get spinning, but why is it that the smaller turbo is getting fed through its intake from the charge port on the large turbo. Shouldn't it be the other way? Spin up that small turbo first, use the charge that it creates to spin that large turbo quicker, then use the charge from the large turbo to feed the engine. In your demonstration, you were feeding the small turbo with the big turbo, which meant that the small turbo was going to be feeding the engine. Am I just misunderstanding what is being accomplished here and all compound turbo setups are like this where it goes big->small->engine? Shouldn't it go small->big->engine?
@andyharman3022
4 жыл бұрын
The large turbo needs to be the one that breathes from the atmosphere because the bigger compressor inlet diameter can flow a higher mass flow of air before reaching the Mach limit.
@johnnyk2322
6 жыл бұрын
This was the best lesson learned. To see hand hear Al & Woody explain how mechanical parts function and how they relate is "PRICELESS" Thank you MCM😎🏁🏁🏁
@Ttamlin
6 жыл бұрын
I am absolutely loving these videos where we just sit and listen to a master of his craft talk about what he knows best. It's informative, and interesting, and it really showcases not just how much you guys know, but how smart y'all really are. You explain things in a way that makes a layperson like myself be able to understand, and that's a real skill. They don't call you Turbo Yoda for nothing! What you're doing is great. Keep up the awesome.
@robertevans6481
6 жыл бұрын
Would like to see it on the truck...and how much it makes...and of course some skids
@brandonlittle6444
3 жыл бұрын
25PSI on the big turbo, and 50 at the engine, means the little turbo is a pressure ratio of 2, or ~14.7 pounds of boost. 25+14.7 = 50! Hot side restriction can be resolved by using larger waste-gates on the primary turbo, or a supercharger in its place.
@AlmostCrazy263
6 жыл бұрын
Yeah. these guys would make great ads for Australia I reckon. An anodyne for all the crassness that often seems to be what people are shown. I think I've said it before in other words, but it's relaxing to see the calm competence applied to problems.
@thaabietmanuel8820
5 жыл бұрын
You are a true Legend Al, I'm from Cape town but I can tell you I have learnt so much watching your videos and you and Woody are EPIC, the way you figure out solutions to all problems you faced and I hope one day that I can make my way over to Australia and maybe one day meet you guys and maybe become your apprentice. KEEP UP THE GREAT WORK GUYS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TRUE LEGENDS!!!!!!!!!!!!!!
@azzdog
5 жыл бұрын
There is no better car show on KZitem than The Skid Factory. Turbo Yoda dropping knowledge everywhere.
@curvs4me
2 жыл бұрын
Pressure sensors ahead of both turbines. Large secondary has to be lag happy and free flowing big A/R. That's what keeps differential up on the primary.
@ralfszemzars1885
6 жыл бұрын
I want a follow-up on this car!
@doxnoogle5782
Жыл бұрын
Aweseome video my guy. Was getting a chuckle listening to the complaining of mounting t3's and the wastegate when im trying to figure out how to mount an s400 under the hood with a v8 taking up most of the room. You do clean work and i like the no bullshit.
@davelygrave21
6 жыл бұрын
In the aviation world, a 'compound turbo' is a weird sort of reverse-supercharger, where the exhaust gas is used to push a turbine that is used to help push the propeller shaft.
@lamboferruccio
6 жыл бұрын
Way to go Al I could listen to you all day mate and I usually fall asleep listening to people 😂
@SirDavothe2
4 жыл бұрын
Good explanation of how the compound system works. I think Alen misspoke at one point though, a turbine isn't using the exhaust heat to spin it is using the kinetic energy from the exhaust flow leaving the engine.
@andyharman3022
4 жыл бұрын
It uses both kinetic and thermal energy. The temperature drop across the turbine has a direct relationship to the energy recovered from the exhaust stream. Kinetic energy recovery is dependent on turbine blade design, and how effectively pulse energy is preserved in the exhaust manifold.
@craigkimber6188
5 жыл бұрын
The internal waste gate won’t work because, as you said, once the smaller turbo spools up, it’s essentially a larger engine. Now all the exhaust gas from the “larger” engine must travel through the smaller turbo turbine and waste gate, which will strangle it. By fitting an external wastegate, you’re increasing the bypass flow capability, and reducing back pressure (as much as you can anyway before you have to drive the 2nd turbo). For the same reason, the external gate should be sized larger than you normally would for a 4.2L engine.
@alltheboost5363
5 жыл бұрын
I've always wanted to do this on a gas engine like a t3t4 t04e and then like a stock diesel turbo like a holset. Only differences both turbos would be Waste gated. Bunch of low end torque with decent mid and high range.
@mervyncausier
4 жыл бұрын
Love the straight up tell it like it is approach.
@Hitman-ds1ei
4 жыл бұрын
Was surprised to see you not using stainless bends etc to avoid cracking from welding dissimilar metals as much as possible !
@HuntingOldYella
3 жыл бұрын
Just ream the hole of the internal waste larger. Back pressure you can measure easily, just run a pressure gauge in the primary turbo housing and you can see what rpm it starts to pressurise over the boost pressure = back pressure
@jaisonbairstow3753
5 жыл бұрын
Similar concept to steam expansion engines, Al - smaller high pressure piston exhausts into a lower pressure cylinder to utilise spent energy. Great vid, thoroughly enjoyed nerding out in a straight-foward way and look forward to more :)
@MrGuitarbike
6 жыл бұрын
Just put a TD04H in my Subaru Outback! Got it for free from Albania, putting in a Japanese car in Canada! Great content guys!
@trevorward1690
4 жыл бұрын
I was thinking the Westgate is to small getting to much back pressure. Love your videos always.
@tjb_altf4
6 жыл бұрын
I've always been fascinated by compound turbo setups, thanks for taking the time to talk about this dark art
@Stickpowell
6 жыл бұрын
It makes me happy I just so happen to have the same shield as Al I didn’t think anything about it when I bought it I’m just lucky, you guys are a huge inspiration
@MrZX1206
3 жыл бұрын
Al can we have a follow up on your buddy's compound turbo setup? What method is he using for wastegate signaling?
@mixalisstathis274
6 жыл бұрын
the bestest show down-under and the earthed antidote to the 2nd best show in oz!
@bjorn1583
6 жыл бұрын
the bestest show down under is on tomorrow "bathurst"
@mixalisstathis274
5 жыл бұрын
van the man.
@ToddLarsen
6 жыл бұрын
Never heard of this before and its very fascinating to me, I've heard of a turbo and supercharger combo before. Thanks for sharing and as always Keep Building👍
@evil_me
6 жыл бұрын
It's primarily a diesel thing, I can't recall any petrol cars using compound turbos...
@HarrodsGarage
6 жыл бұрын
Same same but different haha. I’ve had a compound turbo setup on my Subaru and it worked great! Until i starved my low mount turbo of oil haha
@asshatpolice
6 жыл бұрын
There are a number of gasoline engines that use compound turbo setups. The Toyota 2JZ-GTE comes to mind.
@tonyfranklin5364
6 жыл бұрын
Subaru b4 legacy ?
@HarrodsGarage
6 жыл бұрын
Jacob Skinner that’s a sequential turbo setup. One is on then the other
@christianaugustin7047
6 жыл бұрын
I've never fully understood these setups until now. Thank you.
@ccooxxyy
6 жыл бұрын
I always thought Turbo Compounding was when the exhaust gases drive a turbine that is directly connected to the crankshaft thus increasing efficiency and lowering fuel consumption. I.e. Wright R-3350 radial aircraft engine. Great vids chaps! Massive fan of your work!!
@jamest.5001
4 жыл бұрын
With all the turbo craziness these days, have you seen any twin compound setups? Or even a step further?
@TRIPPLEJAY00
6 жыл бұрын
Happy Anniversary Skid Factory
@davidhickey8613
6 жыл бұрын
This was a pure master class in how to do some very intricate work. loved it. Yoda dropping some serious knowledge for the interwebs points
@soarinsoarer1
6 жыл бұрын
I like the way you think Al.. i was always told is what you are saying about the pressures across the head best way is equal in and equal out across the head .. placing the external waste gate on the small turbo and allowing the restriction to move around it but still feed the bigger is the way i would do it
@pgs8597
6 жыл бұрын
Al’s an artist.
@KALI1080
6 жыл бұрын
I’m really liking this diesel tuning tech stuff you guys are talking about.
@joshlewis5065
6 жыл бұрын
The compound systems usually work better on diesel engines because the air is moving a lot slower. Compound turbos on gas engines need really fine tuning so you don't blow out the smaller turbo or have dead power spots between where the smaller turbo runs out and the bigger turbo is still spooling.
@thebigmacd
6 жыл бұрын
It's more to do with needing more air for a given power level with diesel. If you try to make big power on a small gasoline engine you have the same situation. It's all about the pressure ratios.
@ThatHoodlum19
5 жыл бұрын
I love compound set ups, so cool. Although, I though the intake going from the primary to secondary went the other way around..? So, the primary actually sucks the air in through compressor intake which then directs its boosted air into the intake of the 2nd?? That’s how I thought they worked, but obviously I could be wrong. Great stuff fellas!
@bleeksbentbits3150
6 жыл бұрын
And there I was remarking in the last eps comments that it was a pity you didnt touch on Compound Turbo set-ups..... :v Glad you saved it for a separate, more in-depth & practical episode- thank you!
@HarrodsGarage
6 жыл бұрын
BLeeKiis Too haha me too
@taltracyn3198
6 жыл бұрын
Turbo Yoda : I heard you like turbos, so i put a turbo on your turbo !
@notsponsored103
2 жыл бұрын
Proper cool. Only thing I would have done differently is add second intercooler between turbos
@kentchambers8642
6 жыл бұрын
Congrats on your first year of Skid Factory boys. It's been great following the progress of your builds and hope for many more years of success for you.
@slckb0y65
4 жыл бұрын
"i've put a turbo on your turbo, so you can turbo while you turbo"
@fauxltystower
6 жыл бұрын
"More pipes, more glory." Brilliant.
@karanadon137
6 жыл бұрын
Congrats on the one year anniversary! This is easily one of my favorite series to watch. I enjoy the low-key atmosphere, and especially the knowledge packed into each episode. Good work Al and Woody!
@markraumer2336
5 жыл бұрын
Hi Guys - I saw that Borg Warner had developed a twin scroll turbo with a variable diverted which could channel all exhaust gasses into one turbine housing and then progressively open up the second intake on the second larger scroll. It looked to have achieved a similar trick to the compound turbo but in a much simpler package. the diverted tab was also cast iron and very robust so very good for petrol engines with high EGTs. Have you seen these turbos in the marketplace? It was at SEMA a few years ago and it was covered on engineering Explained.
@Rhandahl
6 жыл бұрын
A good rotary file is a wonderful tool, but also the mother of 100'000'000 small razor sharp bastards, as always you guys are awesome!
@jzaska6734
6 жыл бұрын
f**king top show al and woody, love kicking back smashing lemon aids and watching the skid factory... gotta do more skids in the shop, fill it full of smoke..
@AlittleSmokey
6 жыл бұрын
I sure appreciate you and the time taken to show your passion and knowledge.
@thepeas
6 жыл бұрын
'They flap around a bit.. things run into things..' XD
@TheMechanicalBrewer
6 жыл бұрын
Noting the space limitations on this build it may not be viable, but adding an intercooler between the turbochargers will further improve efficiency and boost potential.
@samuelchartier3684
2 жыл бұрын
"People mess around with old junk engines all the time, it's like a sickness" 😂 I felt that
@hilslamer
5 жыл бұрын
Excellent, authentic synopsis. Well explained in simple terms and concepts.
@rodm5968
6 жыл бұрын
I had to read all the literature on current Cx5/Mazda 6 units and did some on the VW. I still find it easier to under stand. Triple expansion Steam engines. Fairly sure it's due to the multiple valves the car makers use. Still quite surprised how easily the pull more power out of these things.
@MrGuvEuroman
6 жыл бұрын
A lot of twin dam stuff I've seen has two feeds, like a valve, so 1st spools up then once the bigger one starts to flow, then a valve closes the little Turbo off.
@dustinwolfe9591
4 жыл бұрын
I always wondered about using the wastegate that way. Super interested in seeing some data on this combo. I figured there's got to be a reason it's not done. Probably about the efficiency range if I was gonna guess. Overspeeding maybe.
@SuperGrover
6 жыл бұрын
Yaaaay Bedford. You're very generous with your hard earned knowledge.
@j808tba
6 жыл бұрын
Takes a mad man to invent the turbo. It takes a crazy person to mess with one. Nic video big lad👍
@tnexus13
6 жыл бұрын
"more pipes, more glory" with turbo yodas disapproving face sounds like a t-shirt to me! 😂
@TheUnPlayable
4 жыл бұрын
Just to be clear. A turbo doesn't directly increase an engine's efficiency. It lets you burn more fuel for more hp meaning higher hp/liter. In effect a small turbo engine can output the same as a bigger one. That's where the better efficiency comes from -> small block = less friction and losses =better efficiency.
@badm0t0rf1nger
6 жыл бұрын
I've never done any work to a car. ever. But I *will not miss* an episode of this!! Tremendous stuff Al & Woody. :)
@harryguy76
6 жыл бұрын
The small turbo comes on strong at low rpm and spools up the big turbo faster for good mid to high rpm hp...With just the big turbo you would have huge lag till you reved the engine to 5000+ rpm to get any boost and making power while the small turbo would be limited in how much hp it could make...Compound turbos are the best of both worlds...great high and low end power...
@1dickycat
6 жыл бұрын
Congrats on the 1 year
@UltraMagnis
6 жыл бұрын
Hey guys I have an idea for a video for you guys. I see a lot of videos focusing on the basic tools you'll need to complete a job but you hardly ever see a professional like Al explaining what tools he has bought that make his life easier when working on so many different cars. I see Marty fell in love with your multi tool with the ratchet head attachment. I would be very interested in seeing what tools or power tools you have bought and will never go back to the old way type of thing. No matter how expensive they may be what tools have paid for themselves ten fold. That kind of thing. I am slowing getting use to wrenching on my own cars and Id be very interested in seeing what someone like Al considers his most worth while purchases for his shop. Or personal garage. And I'm sure a lot of people would too. Cheers guys love the show.
@wademunyard9026
6 жыл бұрын
Oem manufactures will use a turbocharger that’s a little too small for the application to eliminate turbo lag, but the turbo generally falls over in the top end rpm range. Which gives good instant response. Which is what you want in a day to day driven car. What the second larger turbocharger does is take over from where the smaller turbocharger falls off or stops being as efficient. So in theory you should have a system that’s efficient throughout the rpm range. So no lag and won’t fall over in the higher rpm. Exhaust back pressure isn’t a good thing on turbocharged applications either, so run the largest wastegate you can between the exhaust ports and primary turbo as the primary turbo will become a restriction, limiting the useable energy that could other wise be used to run the secondary larger turbo. When set up correctly you should have naturally aspirated like response but with the added benefit of turbocharging without any of the drawbacks that turbocharging can introduce. Only problem with compounding is that even with just one turbo your generally limited with space, so trying to jam a second one in there might require some thinking which can hurt
@rickcrusenberry7027
6 жыл бұрын
I was gonna ask about the Bedford but looks like you covered that at the end.
@hydrocarbon82
6 жыл бұрын
You need a LOT more wastegate than a typical internal gate. Same for the big turbo, it should be 1.5-2x higher flow than the small. The reason the small turbo can flow so much more - it's ingesting compressed air, which takes up less space. It's also getting most exhaust bypassed thru the wastegate. I just hope you guys get some vids of it on the dyno!
@toocooljonny
6 жыл бұрын
Turbo Yoda Al and Woody Happy 1st year. Hopefully we'll enjoy your vids for many many more years to come, Great to see the evolution of Al becoming someone who was initially camera shy in MMC to becoming a top class presenter in his own right, big love from Ireland
@vlfreak
6 жыл бұрын
sweeet!! gotta love Al's whole "only a TD42... not a cummins..." and the "do the thingy and make the youtubes do the whatever...." ;)
@LucasVWGolfR
6 жыл бұрын
Interesting concept and i think this is the setup my Audi SQ5 3.0TDI biturbo runs.
@DylanTK
6 жыл бұрын
Al is absolutely the best... I love all the other folks too, but he's so damn interesting.
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