You're Gonna Need a Bigger Plenum...-Engine Masters Preview Ep. 51

Watch the full episode on MotorTrend: bit.ly/35nahxe
Well, maybe. This time on Engine Masters, presented by AMSOIL, we dive into what effect changes to your intake manifold's plenum volume will have on your motor. We want to know if all of the Internet's theories about big boost, big cubes, and/or big rpm needing bigger plenum volume really hold water. Will all of that increased volume really turn into increased power production or are you just creating hood clearance headaches? Watch as we go from straight out-of-the-box to out-of-the-bounds-of-sanity with this plenum volume comparison. #EngineMasters

[@JoeCnNd]

I miss this show on youtube.

[@threesquared6720]

Me too, I was a paying subscriber, but they wont let me subscribe anymore, alas

[@ryanchalmers9298]

5 mins of my life I’ll never get back

[@ovalwingnut]

Yes! Yes! Yes! (sadly something my GF doesn't say any more) Best example of "bait & switch" on the Interwebs.

[@jondoe6618]

Come back to youtube where y'all belong. Where it all started!!!

[@dopeass791]

Engine masters has never been on youtube you dumb hick.

[@ziiofswe]

Yeah, I'll classify this as pure clickbait.

[@MrTheHillfolk]

@@ziiofswe I've found em bootlegged on here. When you find em watch it immediately or it will be gone in the blink of an eye.

[@krover01]

Probably the most uneventful episode yet.

[@NoMatureContent]

Yeah, this was terrible.

[@CraftsmanQuad19]

I wish they would’ve tried the other way and gone smaller than their baseline as well

[@markovichglass]

I was hoping you were wrong...... but, nope. Why is this clipped out? I thought I was going to see some action and learn. But nope, just fluff and bs.

[@Anthony_Pell]

Still not willing to pay so just come. Back to KZbin.

[@thenewhalogod]

second this

[@klassenkustoms9932]

Sucks you’re not willing to pay 6 dollars a month to see like 20+ sweet shows

[@klassenkustoms9932]

Must suck being that poor

[@gsppuffer]

It's worth the 5 bucks

[@Darndiddlyarn]

@@klassenkustoms9932 sucks that every time I go to mtod it says "sorry content is not available in your area"

[@MrT7nia]

Nope, still not getting your membership. Shame this is just a money grabbing scheme, you have more than sufficient paid promotional content / ads , my mulla aint joining in.

[@ufarkingicehole]

Spoiler..... They don't show you the results.. They want $$$$$

[@1989GTADRIVER]

I went from a stock Tuned Port Injection long tube intake runner making a lot of low end torque... To a Holley Stealth Ram intake with a large plenum and short runners. Love the latte... If memory serves me correctly I think it made an extra 80 hp on a lean AFR

[@SouthernCrossMotors]

Just watched this. Great stuff 😀😀 Just a thought. That lower intake manifold. The air going into each cylinder may be dictated by the runner size. So no matter what size the plenum above makes no difference. If you look at a V8 Supercar engine for example, They run independent runners with a throttle butterfly on each cylinder, but a massive air intake plenum above it. I would love to see that same engine tested with eight throttles and see if the power is different.

[@a.jsipple7322]

Do Not Watch this video. Its Just a teaser for a video They want you to pay to watch.

[@chrismcglumphy93]

I subscribed to motortrend, I feel it's worth it given all the content besides roadkill. I enjoy the tech in this program and hope it sticks around. I feel like this being a relatively new episode that it may be in jeopardy barring interest. I also miss the short how to segments on the on demand channel.

[@rsproductions5]

They would make so much more money if they brought some of these series (like the ones that did really well) back to KZbin. Throw in an ad slot/season sponsor slots and then some of the other shows/newer shows BTS etc on the MTOD program.

[@bilbobaggins4710]

Yeah it makes no sense... They have enough subs to make sweet $

[@Serps-ii9zc]

Companies are in the for profit business... If they would make more money on KZbin they would still be on KZbin....

[@dopeass791]

What? They make a bunch from mtod. They ditched KZbin casue they earned to little money from it not cause it was funny.

[@six159nagito]

No they wont, because they already pissed everyone off and we went and found better shows while they were gone.

[@Serps-ii9zc]

@@six159nagito Oh please... If they started uploading to KZbin again you and everyone else would come running back.

[@noahrodeghiero9640]

The 318 magnum would be a really good test bench for this expirement.

[@jnmz50r]

We need more real world stuff like this current stock or slightly modified motors like 5.3 5.0 5.7 stuff most people drive today and want to build for everyday street applications

[@ddd228]

Yes,please. Easy to do mods for most bang for the buck. We do NOT have cubic dollars. Intake runner lengths affect the torque curve,NOT high-RPM power. Street.......We are not all drag racers,I'll guess. I'll spend $50 for a 10% increase in low end torque,not $100 for a 10 % gain in red line power. Thanks.

[@CraftsmanQuad19]

Build for torque and horsepower will follow

[@mudpuddle8805]

Dammit! I really want to see where this goes... but not enough to go join some pay-per-view site.

[@CraftsmanQuad19]

Here’s the plan. 1 Find a buddy with motortrend on demand. 2 Get him to the bar 3 get him to give up the username and password to the account 4 watch your on demand shows for free again with no ads

[@markchavesjr555]

It’s $6 a month......

[@CraftsmanQuad19]

Mark Chaves Jr and? Get your buddy’s password and use his account. He pays, both watch

[@scottydoesntknow254]

Make this channel great again. Like free....

[@BBb-hs9ud]

I'd like to see an episode about head modifications. Like port and polish, different cuts, dimple porting, ect

[@DanielVasquez-kq3we]

Everyone complaining about paying for on demand shame on you for not support them. If you can you can but doesn’t mean you get to hate on guys who are following their passion and putting out A1 content!

[@TallGarage]

I love that i have to go download this from THAT website cause you guys wont keep putting your content on youtube.

[@CraftsmanQuad19]

One thing I really wish the app had was the comment section. Lots of really cool discussions down here about different tests and tweaks they could’ve made to the tests they did

[@johnogo7886]

Will that setup work with a 69 Mopar 383 big block with roadrunner cam and 11.5 to 1 compression ratio?

[@NerdyMeathead]

Dude did you guys really private most of the old roadkill episodes? Woww

[@fairlane2020]

Anthony Efx And they said they weren’t going to.

[@NerdyMeathead]

@@fairlane2020 I remember them saying it would always be free on youtube just come out later. Ok that didnt work I get them not uploading any new ones but to go and private all the old ones is bull

[@mrb.5610]

But is it plenum volume or the distance from the plenum roof to the intake runner that's affecting it ?

[@GJ-DT]

Funny how people say ls are better, put 15 degree heads on 383 and see what happens and spin it to 7k

[@bdavis12758]

Hey Dave, big fan of your shows.... you should do a roadkill garage extra building your own AFR gauge for carb tuning so us guys that don’t want to spend $600 on an afr kit

[@cryptorchildx889]

I hope this was a joke episode for Halloween, because I love this show and this episode seemed like a joke. I thought it would have good insight like the carb air filter episode, where we learned a salad bowl can add a few hp's, instead this episode was short and did not really teach anything.

[@Serps-ii9zc]

It did teach something though, that plenum volume really doesn't mean anything.

[@CraftsmanQuad19]

Serps1991 I agree to a degree. I wish they would’ve gone smaller with the plenum as well to show an inverse effect. The plenum they tested first was too big for the mild engine (they said so themselves). Ok so....try a smaller one and see what happens?

[@Serps-ii9zc]

@@CraftsmanQuad19 the problem there is to run any smaller of a plenum than what they had would have requored changing the manifold, and then you get into runner size and length changes, and those things do make drastic differences. The common theory is bigger is better, and this proved that isn't always the case. And I'm willing to bet it's fairly accurate and even going smaller wouldn't have made much, if any, difference.

[@CraftsmanQuad19]

Serps1991 why would you need to change the manifold? All it takes is a little sheet metal and some ingenuity to make a smaller plenum for this existing manifold. They made the big one, why can’t they make a small one?

[@louieposlof4372]

I don't hold myself in anywhere near the level of reguard, that I do the three of you. However, it seems to me that the hemholds resonance, would be a greater factor if it were a air/fuel charge in the plenum, rather than just air. Due to the added atoms, the resonance has a greater deal of mass to transmit , and or conduct it's wave. I would very much like to know if I am wrong though. Your input on the matter would be greatly appreciated. Louie P.

[@CallofDoobie585]

WHAT CAM???? SPECS????

[@DesertSurfer]

I run a 1 inch on my 95 cobra intake to help reduce upper intake temperature.

[@trentdawg2832]

Holdner is the MAN......big things do come in small packages

[@pointmeby]

What cam did you use in that L9H?

[@MADMAX7330]

Can you guys run a test with an aged and clogged catalyst to show performance sensitivity to exhaust backpressure?

[@denispalmer1937]

looked for the result comparison where is it,

[@caseywest5278]

That’s crazy I can’t wait for the actual video to explain this and how to get your hands on it.... let’s go fellas I’m not getting any younger

[@turbomaxx8914]

So where's the rest of the test

[@cskibb67]

Love this stuff you guys do!!! Well done! Youngstown, Ohio

[@ddd228]

I missed the results and the theory.

[@Anarchy-Is-Liberty]

Yeah, this is great, if you can afford a $6K 6.2 LS, then another $4500 for the cam, Holley intake, and headers!! I can build a BBC from the junkyard for $4000 and make this kind of power, and still be able to grow more!!

[@louis-philippelavoie6929]

Someone know results?

[@a.f-body1vids655]

It should make good power. It's got great heads, it's a 383, it's got a cam, and a good intake.

[@KevinTodd]

Please do a inline 6 4.0 jeep motor I want to hope mine up but there is no good info.

[@STAY-GOLD-VINYL]

Proves that a Holley Intake is overpriced metal art

[@___Karma__]

Air + fuel + spark = fun 🤗

[@gloriamaletta8667]

Even with driveline loss accessories like water pump alternator and power steering and a good lockup torque converter this engine should put 440-460 horsepower to the backwheels and be capable of 10.80s to 10.60s in a car that weighs 3500 pounds with driver and still be able to cruise 75mph all day on a road trip and last and run good for many years if maintained well and if not constantly beat on

[@mwmannel]

Still not gonna get the mtrend sub.

[@gonmad7073]

Motor Trend sellouts

[@nono-fn3zc]

Bring back KZbin episodes !!!!

[@drewsharpe7484]

What LS heads come stock with no freeze plugs?

[@bartonmd]

Went to the ap to watch the whole episode, and was disappointed to see that you took away the "watch last month's episodes for free with ads" functionality. Sorry, but there is more free content on KZbin than I have time to watch, so I see no point in paying extra for just (even really good) car content. I wish you well, though!

[@dielauwen]

Engine Blasters Come back to earth! Bigger plenum less response .Best is individual throttles . Why mess with a factory bandaid.

[@justinbustin677]

Maybe Banks can start doing similiar tests

[@scottmiller3025]

Well, got to see some of it atleast.

[@mrmagoo916]

Please check out " Martys matchbox makeovers. Great

[@gloriamaletta8667]

I think these heads are stock I'm thinking if the heads were CNC ported and milled to increase compression to 11.0 to 11.5 it should pickup another 20-25 horsepower but 572 is a very respectable number and this motor with the right transmission and gearing should pull very well from 3000rpm to 7000rpm and be totally streetable

[@cheaptick]

THANKS FOR WASTING MY TIME WITH THE FLUFF AND NO CONTENT

[@valuedteammember1005]

CheapTick is WISE beyond his years

[@docfischer7291]

That’s like $93 per runner... F that ! The stock manifold will do 500-550 hp as well with a dull cam. I’ll keep a few bucks, go stage 2 cam, decap, tune and be happy.

[@ovalwingnut]

A lot of yapping with little action... sorry.

[@jerryduyck7239]

Hey I know these people are wanting to make money but I wish they'd get their head out of their blue oval 255 and put their stuff back on KZbin

[@StavTech]

I normally love Engine Masters, but this one was a bit pointless. You started with an intake you already admitted was overkill for the engine, and fitted an even bigger one. Of course the results would be like that. It may/would have been a different story if you started with one too small. That's like testing a plenty big enough exhaust then an even bigger one then stating bigger exhausts don't matter.

[@paulholla]

Sellouts... Motive tried tried this and they eventually came back to KZbin...

[@theoriginalafroninja]

Incase people are here to learn a bit about what they're talking about, In a plenum style intake, the volume of the plenum, expressed in the # of times greater than your engine discplacement, has a direct impact on high rpm power output. Research papers have shown that you get negligible power gain past 10x your engine discplacement, but none of that matters if your intake runner diameter and runner lengths are whack. All the properties of the engine gotta match to perform best in the desired operating range The underlying theory is that the plenum chamber acts like a helmholtz resonator.

[@asskickingperformance3550]

He don’t know cause he copied that straight from google!

[@indopleaser]

whats going on here? wheres the episode? or cancel the comments. sorry for the rant

[@alanbuckingham2713]

I like volume

[@kirktrevena2920]

not paying for a sub

[@strokerz2858]

Lock in the torqe curve

[@boostinwillie]

🤔 truck intake...still FTW? Lol maybe I’ll buy a Holley to be a cool guy too 😂😂😂 jk. I love the channel and engine masters 💪🏾💪🏾💪🏾

[@Jeroenstiekel]

time to get back on KZbin

[@Guy_de_Loimbard]

That's what she said.

[@GTFour]

No conclusion, wtf

[@NerdyMeathead]

Who has the tldr on this episode

[@theoriginalafroninja]

power increase becomes negligible past a plenum volume, 10x your engine discplacement. source: On an FSAE team where literally 400 teams study this very phenomenon. Works great for bike engines

[@Matt_T_Garner]

Areg Armavil so bigger plenum means bigger power?

[@Serps-ii9zc]

@@Matt_T_Garner Not always. In the scenario in the episode it made almost no difference. It might make a bigger difference on bikes like Areg said because they rev to 15,000+ RPM.

[@TeamTopKick]

Dodge Kegger.

[@amik7614]

this ep. was like a ford engine........

[@Procharged32]

Wastefull.

[@CTmoog]

👍😎👍

[@zzzBaki]

I’m not first but once I see the notification I’ll be one of the fastest to click it

[@larrydugan1441]

That's a cheesy way to get subscribers. Thumbs down

[@xnoxkillxgaming392]

I'm the seventh 👍👌

[@diegotinegimenez]

First

[@djv8361]

First