Not that anyone will read this, but as a physics student, it could be that the potato is generating ring shaped vortices due to the tendency for high pressure regions to fall into low pressure regions like the back of the potato while exposed to moving air. This motion would generate a ring vortex going out the rear of the exhaust, which may actually help disrupt far more harmful turbulence caused by the exhaust gas meeting with the atmosphere. This is the same principle behind why golf balls have dimples. You are creating one form of turbulence to help negate another more destructive form of turbulence.

As an Irishman I am qualified to tell you that the potato makes more power because the leprechauns in it are friends with unicorns and provide a trade deal for more kilowatts

This episode feels like a very old school MCM vid, which is perfect!

Engineering Explained will be breaking out his whiteboard in 3...2...1...

This is old news guys, the Irish have been sticking Potatoes up their rear pipes for years!

"What mods have you done to the corrolla mate?" "a potato"

An 8% increase on 50 KW isn't bad for the price of a potato

I thought they were gonna put a potato cannon on the back and shoot a potato out while driving to see if it boosted it...

Formula 1 engineers are now stuffing potatoes into their exhausts

I told my girlfriend I was going to sleep so I could watch this in peace

I had a 1986 Corolla twincam same body type, just older it was a brilliant little car had awesome fun with it.

Totally loving how this feels like the MCM of years ago. While it's no longer a budget driveway show, you have once again captured the feeling of what made this show great. The new content is amazing and shows how things have grown, but this feeling is what drew me into MCM. Keep it up!

Me: oh a new MCM episode *Reads title* The fuck...

Do you think the potato will fit my honda?

Now thats a refreshing and funny intro :D

Great video, learned something new and had a bloody good giggle at the same time. Cheers, subbed.

is it 4kw per potato? i think we need a exhaust + potato = 4kw shirt.. just saying

Going to the store to buy a whole pack of potatoes. I'm line my whole exhaust system with these to make 800 hp

This is super awesome!!!!! I have a 1996 Toyota Corolla. I'm so ready to see what you guys do.

Best episode in a while! This is oldschool mcm! More plzzz!

All the dyno readings variations are most likely due to the engine computer adjusting itself, possibly oxygen sensors reading better after some high RPM runs burning off contaminants, fuel injectors cleaning themselves after high RPM runs, or many other possibilities. I'd bet money that if they did multiple runs with the stock exhaust it would show the same variations.

Imagine getting chopped by a car with a potato in the exhaust.

at 0:12 in - i would laugh my arse off if someone put that in a wad of cash they were giving me.

Thank you thank you thank you thank you!!! As much as I loved your Hollywood high production valued car shows with your team of experts, all i wanted was more low end diy vids for normal users!! please more with cheap cars and experimental stuff! reminds me of the good ole days

Thought this was a how to basic video by the little intro...

potato is clearly a better option

Mighty car mods. I have been watching your videos since forever and this is the best intro you have ever done! well done.

Whatever different kit you used has made the sound go out of sink if your watching on an amazon fire stick. About 50% of all you tube videos are out, but yours, and Caseys were allways in synch. I know I sound crazy, but it is something I don't think a lot of tubers realise. Love your show, and been with you from the start. X

I like the oldschool feel of this episode! more please! bring back the miatas!!

😂😂😂 Church St Spec, put that in sticker production.

We missed the old time episodes like this :D Keep it up!

i am glad ypur doing this car. its a similar version of ae91 92 ee90 and people dont know post of the small easy mods to do. this will help.

Will try to pay with a condom in the shop next time and see how that works out lol

forget going to sleep now

I love this car. I'm just happy finally seeing you two in Toyota.

Ahhh it's so refreshing to have you guys get back to the old days of myth busting and or how to vids.!

BEST SUNDAY I've had all week!!!

best intro ever!

In a parallel universe people are stuffing exhaust into their potatoes to the same effect :D

That's a throwback to the old MCM and I love it

Maybe thrashing full throttle cleaned the engine pathways a bit. Giving it more power each try 😅

Forget the potato, just connect a vacuum to your tailpipe. Perhaps an array of Dysonz? Zero back pressure, maximum power! (actually, Honda F1 engines used low pressure in the crankcase? to obtain their ridiculous high RPMs)

Back to the cool stuff. Keep it up.

loving the old school feel of this video. please do more.

i'm a huge fan of toyota, and i hope you two make more videos with toyotas. Toyotas, the older ones are the better

MCM filmed with a potato confirmed

back to the basics, this is what mcm is all about

Had to rewatch the intro, it was too perfect. :D

you should buy a massive garage to put all your creations in

I'd like to think i would have been named after a better car. But i'll take it.

loving the Carolla,I drive a 99 Tercel myself and love the Toyota stuff! watching here in NFLD Canada

Loved the video fellas! I had one of these as my first car just wished I'd know about the power of potato when I was on my P's. You should try my exhaust set-up: Rusted out muffler

Please do a follow-up on the power of the potato.

Straight pipe is best pipe

That was the best intro of any mighty car mods episode that I've ever seen

This was back to roots amazing!

Please do more vids about the corolla! I've owned one

If only Ubisoft would make cars... Those servers will make supercars.

Love the Corrolla, because I have the same car here in the Philippines, but it is a sedan. Hope you would mod it, those cars looks very good, and they are very popular in our car culture. Thank you for making awesome videos as always.

Awesome old skool MCM stuff right here!

Wait, WTF... That potato shouldn't do anything but add back pressure... How... No... My brain...

can you test de-cat too?

I thought it had something to do with helping the back pressure that goes back into the valve because of exhaust pulse. But I can see why you had your idea too. Good work

I'm not really into cars but you guys make watching car mod shows interesting

wheres the mira build

MCM Potato pipe > Engine Masters

loved the intro, nice touch

YES! More 1992 Toyota Corolla videos, maybe get an SX model? I've got one in Victoria that you can have, nothing wrong with it just needs a clean and the spoiler refitted.

try this on a turbocharged car!

What happend to the Mira build

A classic MCM. I'm loving it. Hope Rake does too.

And that, my friends, is the sound of nostalgia. 90's Corolla with a cannon exhaust takes me back to some of the best days of my life so far

everybody let's put potato on our exhaust to make us look fast

We need to get "Engineering Explained" on this ASAP haha. Upvote so it gets noticed!!

Awesome to finally see you guys in a Corolla!!

I think the answer lies in turbulent vs laminar flow. Think of jet engines on fighter planes when they use afterburners. In this case you can see the laminar flow of exhaust gasses as they escape with very little disturbance. This picture can help you understand i.ytimg.com/vi/CH0-d1udXWY/maxresdefault.jpg

Someone who can get a message through to "engineering explained" please ask for an explanation of why this works like this.

This is your best work ever!!!

Please do this car up. I am thinking of buying on and want to see what they're like done up to the max

Hotter dyno's often read a little higher, so I suspect if they did the potato first it wouldn't have won. Also I suspect the pipe diameter in all the tests are too large, therein causing a velocity change between the main exhaust and the pipe you where swapping.

see if putting steriods in the gas if you gain 300 whp

Get a Mazda 6 MPS next! There are so few quality videos about that car, it would be a blast! Keep up the amazing vids guys!

greatest yt vid ive watched all year

I'm sure the car was just running better as it warmed up each run... right? Right guys?

Hahaha loved the potato mod... The science and I believe most of the guys here knows this.... but for those who don't.... the potato helped create enough back pressure to generate a siphoning effect in the low to mid rpm range. So the piston doesn't need to push the gasses out in the mid rpms... at low rpms, it helps create a vacuum in the piston that will help suck in air as the valves open... similar to longer runners on your intake manifold, it helps speed up air going in, thus more air and the turbulence in the manifold helps mix the air and fuel thus better power in the low RPM.... But note this is different when your engine is revving high. Turbulence will now make air move slower and back pressure will mean the engine needs to push the air harder... That is why everyday cars have long intakes and restrictive exhaust because it runs more or less 1000 to 3500 rev range only while race prep cars run around 5000 to 10000 rev range. This is why sport bikes have a automatic cutout exhaust valve that is controlled by the bike's ecu to control the flow of the exhaust by creating back pressure as needed... Speaking of.... that would be a great project... ecu controlled exhaust cutout valve :) not sure though if it can be opened and closed like a throttle...

i don't care about cars but i'm hook by the fun i get watching you ^^

this series is gonna be dope , missed the raw mcm 💗👏😂

Derek the potato nugget.

HAHAHAHAHA why do you have condom in your money? :D

This makes me seriously nostalgic for my Corolla... Was almost identical to this one! Handling was seriously dodgy in the wet, and the brakes were totally useless, but still, good car.

Love the old fashioned MCM video. Do more!

Everyone go buy a single potato.

67 BHP 68 BHP 68 BHP 72 BHP

Reminds me of your older videos, make more of these!

Lol dat intro!!! Always putting out great vids!!!

you aussies have the weirdest currency, I've never seen a square coin.

Screw notification squad. I'm in youtube all the time.

you guys should do more of these little vids like the old days with the diys

i liked this immediately, just for that pre-intro hahaha

This would be a good one for Engineering Explained to explain