Engine Bore and Stroke Explained | K24 RBB

In this episode, Papa Suppy explains what Bore, Stroke, and Honing is. How it works. What role it plays. Sit back, and learn something.
Yep, you can win this motor once it’s built! Check out www.hoonigan.com/giveaway
Say whaaaaaaat we’re building a sick 10,000rpm N/A K series, we’re giving you the chance to win it, AND Suppy is going to teach you stuff about engines along the way? Maybe we’re generous like that. Sometimes. Or maybe the pain of not seeing Zac’s truck around anymore will make us think twice. Either way, let us know what you would want to swap this thing into.
Thanks to SEMA Show:
www.sema360.com/
Thanks to JDM of California:
Web: www.jdmcalifornia.com/
Instagram: / jdmcalifornia
Facebook: / jdmofcalifornia
Thanks to GEARWRENCH for the tools:
www.gearwrench.com/
IG: / gearwrenchtools
Thanks to K Series Parts:
www.kseriesparts.com/
Instagram: @kseriesparts
Thanks to Skunk 2:
www.skunk2.com/
Instagram: @skunk2racing
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[@AZ30590]

He builds and explains clearly without losing his temper? He's a god!

[@michaelsimoneau8364]

He is that thaï sleeper XD

[@hagestad]

dude he said stroke is partially determined by rod length lol

[@carnyx8016]

Suppy does such a good job explaining technical terms. Keeps up the series love it!!!

[@B.Colby107]

Suppy "See I no stupid" best starting line of a video on Hoonigan.

[@GG-cn6es]

the crank girdle is one of my favorite parts about the k series. makes the block soooo solid

[@Trident_Euclid]

@ 2:14 honing is performed to make the cylinders straight (with torque plate) and the cross hatch is for oil retention.

[@lunkydog]

.010" is .25mm .020" is .50mm(half a mm)

[@mal3762]

thanks for this, coming from the East, sure I'm confused.

[@lunkydog]

@@mal3762 Just a USA machinist here, I'm used to having to convert.

[@lunkydog]

@John Daley Not a lot of close tolerance work in horticulture.

[@71ChuckNorris]

Yeah exactly. To be more precise, .010" is .254 mm

[@Erythropoietin]

See? When it comes to sicence, ppl are using metric and not imperial...

[@BugsBunns]

Love the serie, definitely a big help for the "new to building" part of the car community. Thank-you Suppy for sharing all of this knowledge with us!

[@lanceuppercut6168]

Would be cool if they made a series where Suppy does in depth engine build tutorials.

[@BBCharger5spd]

@3:18 - not knocking you Suppy but you CAN add weight to a crank to balance it... usually more expensive to do as it requires a very heavy metal like Mallory to be pressed in a hole. The OEs find it cheaper to cast larger throws and just drill to lighten / balance. Awesome video

[@burntchickennugget191]

We have all had that moment were we tell ourselves "Im not stupid" but suppy does it in a way that just feels right

[@MrImpalalozano]

Appreciate the new series. One of the best engine build/info. videos.

[@lycanwarlord]

when you see someone with the technical knowledge of Suppy, its really awe inspiring. Please do more videos sir

[@DunkDrives]

This is a really awesome series! I love it! Love getting right into the nitty gritty of it! Suppy is great at explaining everything.

[@HeyStack17]

When they hone a block it is actually truing up the cylinder dia to spec. this is done to achieve the RA. finish in the sleeve. the pattern you see on the walls is cross hatch. This allows a very thin layer of oil to remain on the sleeve to keep the rings from scratching the sleeve.

[@supersevenn]

you are almost 100% correct

[@alexsolomon1636]

This series is awesome, the explanations are so clear and simple I love it.

[@joealex65]

When i saw Vin's face i was like "Who the F is this guy and what happened to his beard?!?!" 😂😂😂

[@abelcsaszar9026]

I just recognised his voice not his face :D Weird.

[@Verzox]

I feel like that's an old clip or sth

[@joealex65]

@@Verzox Old? Go to his Instagram and see how that man butchered his face! 🤣🤣🤣

[@masaharumorimoto4761]

Perfect explanation!! The old man was a GM technician and I grew up on GM blocks so this is very interesting to me!

[@xavierhuffman1406]

Just found this video series. I love it! Hope you guys keep the content coming!

[@V_Matviichuk]

2:25 that's not the reason for honing. Honing is done for the oil to 'grab by' the cylinder walls, and thus create a lubrication 'film' (or surface, if you will). That would, on contrary of what Suppy said, make your pistons travel smoother without grabbing the cylinder walls. Also it prolongs the life of your rings, pistons, and block. It has nothing to do with compression.

[@Verzox]

I absolutely love this series

[@MrBillsfishin]

Nice job teach! That was a very down to earth explanation for us non mechanics.

[@williamkeenaghan2243]

Loving this series. More please!

[@Dar_Paz]

Vinny caught me off guard :D

[@danielleyva8385]

Heck yeah. I’ve been wanting to learn more about these engines in detail

[@420pray4]

also yes i love his descriptions and personality

[@andrewcollins6525]

Great video. Just bought my first type r

[@bushidobrown9857]

It's cool that sema is still happening, but pffft I live down the street from the convention center. It was dope walking by and peeping the madness

[@Hohmies86]

I appreciated the hit marker sounds with the screws installation

[@fuekongyang3144]

Surprised this hasn’t even broke 100k views yet

[@TrapJacket]

Great presentation Suppy 👌🏽

[@vans1512]

We need more people like suppy

[@mk3_jcb229]

Mad love for suppy!❤️

[@r.e.8809]

Thanks guys

[@faisaladi4822]

he is like a supervisor that everyone likes, suppyvisor report for duty!

[@mikeevangelista1532]

Love these videos! Learing from tve best!

[@Vikseemungal]

I appreciate this video a whole lot

[@beardosestuff1880]

This is dope. Keep it up!

[@bighomieJ5X]

Love the nerd out episodes like this #Hoonigan can we have more plzzzz😬😬

[@yanuardhana6457]

it's easy to follow, this k24 all motor fully built it's sick...

[@xuxamelo]

Just a quick note, do not put excessive sealant a slimm line is more than enough. Do not contaminate the crankshaft back seal outer surface with oil. Overall nice explanation ;)

[@ryanhard5273]

Ooh I actually know something here. Re. the torque vs. angle. The important force here is clamping strength but that's pretty damn hard to directly measure so the best way is to calculate it using the ramp angle on the bolt thread, this directly translates to an angle that can be measured. Torque on the other hand can vary a bit based on things like putting oil on before tightening so you have to know if they meant dry or lubed torque readings. Amount of angle doesn't change based on the turning force required. Thanks AvE

[@zakshah3480]

Dude, this is such a great explanation. Great stuff. Got a sub out of me.

[@donhiginson2088]

Really Informative!!!

[@raynorjoseph9643]

Very interesting video

[@Yvolve]

I'm sorry to say Suppy got the honing bit wrong. The rings are pushed against the wall by the crankcase pressure, coming through small holes in the piston, behind the rings. The cross hatch allows oil to stay on the cylinder wall, so the rings don't scrape on bare metal. A rough surface would wear them down faster, but a cross hatch is a very fine pattern that doesn't scratch.

[@leoperez9732]

Kickass Muldowney that was badass yo!

[@IzPOV]

Amazing

[@kenethrobinson8841]

Please make an engine building series presented by suppy

[@dobermanracing]

More like this!

[@gamielmendoza7841]

I seriously need to try and win it, this would be a game changer for my k24 swapped civic, plus my tuner would have a ball with this setup lol

[@daltonbaker5049]

Currently I am stationed in japan and bought a 1986 nissan be-1. When i get home I was going to do a k swap into it.

[@joelfrancisco3798]

I know K24's make great power, but I never knew they were an open deck design. That makes it all the more impressive

[@TheRwdyAudi]

Ahhh sadly I remember when the chevy hit the container at 2019 SEMA I was inside there when it happened.... first thoughts "wtf just happened"

[@arcadiagreen150]

I thought that the cross hatching in cylinder walls was to give oil a place to go when being lubricated.

[@sebi89onair]

To be more precise: it makes shure, that the oil doesn't run down the cylinder walls too fast and ensures, that the piston doesn't run dry on them. Main reason for honing. Don't mistake it for hooning!😉😬

[@arcadiagreen150]

@@sebi89onair the explanation that suppy gave sounded completely made up to me. Ive never heard what he said before

[@sebi89onair]

I think what he is talking about is how the piston rings seal the combustion chamber between piston and cylinder and how the oil scraper piston ring leans on the cylinder. So it's not entirely wrong, but it has more to do with adjusting the piston ring play than with the cross cut on the cylinder. Both make sure the piston runs smoothly in the engine without hurting the cylinder surface.

[@Yvolve]

You're right, Modern pistons are have holes behind the rings, so the crankcase pressure can push them out. You don't want a rough surface as it will wear down the rings, the cross hatch is a very fine pattern, so it works. The oil film allows the rings to slide smoothly along the cylinder wall, instead of sliding on smooth metal or grinding on a rough surface.

[@supersevenn]

@@arcadiagreen150 Suppy is correct. The piston ring needs that rough surface so it can wear and seat in to the cylinder wall. if it was smooth it would never seat (also called bedding in). oil rettention is another benefit. all the explenations here are correct but the is no ONE reason for honing, there are several as stated

[@creeplife2802]

Suppy is the best

[@daviddawson2405]

Bro I'm actually learning something's I didn't know I like this idea

[@zKiLLA105159]

Thanks for the advertisement progress bar 🤗

[@willecutlip]

next episode - can Suppy talk about the difference in engine assembly when using aluminum rods instead of steel rods? Specifically, rod stretch at higher rpm and how to account for it in the static measurements ?

[@OlDustyTrails]

I am hoping that Canadians are able to have a chance at this contest... Since I was super bummed about not being able to have a chance at Boomhauer. Fingers crossed.

[@gprime70]

Today I felt like hitting up their site & want to try to buy something to get entered in the contest but looks like it's only for the states 😢😭

[@lanceuppercut6168]

Yo I could watch Suppy do engine build tutorials 24/7

[@tunerhead]

Thanks for building my K24 Suppy .. cant wait to shove it into my NA Miata LOL

[@drkhaaaan]

I wish the giveaway included Florida because I'd love to put this suppy built k24 into my midori green ek hatch

[@Beardchanics]

Not much better as giveaway than a K24 build by Papa Suppy!

[@mrwess2532]

K24/20 Franky supi!!!

[@angelalvarez7339]

I would swap it on to this 2001 honda accord lx sedan we have just sitting there, it still runs and drives all electric windows and the moon roof still works also currently inside the engine bay it has 2.3 liter sohc ulev vtec I'm from west phx, Az

[@rardner4054]

I have watched so much of this channel but I have only just noticed that the drone shot is in reverse

[@elijahacosta9570]

You guys should go to a machine shop. I wanna see how they bore and hone a block

[@acompres]

Didn't know Vinnie had a cousin that worked at hooningan. Cool.

[@HiyasuJ]

Angle tightening is here to "stretch" the bolts, thats why you never reuse them usually

[@VDuro1]

WHERE IS THE NEXT EPISODE SUPPY I AM COUNTING ON YOU HERE!

[@craigbullock8245]

To be clear, stroke has nothing to do with the rod length. You were right with the centreline explanation. That gives you the radius. Double that for the diameter and that is your stroke length.

[@andydelassus2734]

The little cross marks with the click noise is always my favorite part

[@kawaiikeyboards]

not sure if part of the video is skipped, but did Suppy install the bearings without doing the clearance first? Not sure if its OEM bearings or aftermarket, OEM bearings have a certain thickness which helps make the crank more balanced. (some say OEM bearings are more accurate than aftermarket ones) Usually the steps involve using plastigauge and stuff but I'm assuming Suppy knows what he is doing. ✌️

[@spacestreef]

k series all the way

[@jamieengland5108]

will you be running a deck brace with this build? If not is the open deck design strong enough in the k24 to prevent the sleeves fro moving at 10k?

[@gordowg1wg145]

Reasonable 101, except for a few glaring mistakes... Normally I'd let them pass, but from the comments it seems there are quite a few people who are using this as a learning tool. 0.010" is ~0.25mm 😉 5:55 - uh, no, that is the crankshaft 'throw' the stoke is double that distance - the difference between opposite throws in this case. 2 bolt main bearing caps are found on almost all engines with 4, or even 6, normally being restricted to high performance engines where the additional clamping strength is requred - girle comments are good, though. WAY too much sealant for the girdle - the gap it's sealing is barely in the thou' range - almost all that excess sealant is going to be extruded to the inside of the engine, in the crankcase - it will often breake free and more than one engine has failed because the stuff has bloked the pickups and caused a loss of oil pressure. A warning to builders looking to save money - ANY bolt that has an angle specified to tighten-to is a 'stretch to yield' fastener and MUST(!) always be replaced with a new fastener - NO exceptions! However, enphasising the importance of the engine being CLEAN kinda makes up for that. 😎

[@bryceridesbikes]

A while ago you guys featured some sliding shelves in an ad, I can't find the video that had the ad. Does anyone remember what they are called?

[@5om3dud35]

I bought wiseco Pistons for my CA18DET. Even tho they said it for a DET motor it still broke one of my oil jet/squirters. It was an expensive oof

[@XskiXedgeX]

It is going to be like Christmas if I win this. Turbo M30 is getting ripped out of the E30, THAT MINUTE!

[@jermainepeters7637]

Please explain what's happening with your rx7 Suppy with the LS swap 🤔🤷‍♂️

[@krx_kid9104]

Would have loved to hear your explanation of rod-stroke ratio and the way OEMs vs Indy cars use these strategies differently! (i.e. high revs with low stroke big bore vs low revs with big bore high stroke).

[@gordowg1wg145]

You mean bore-stroke, rod stoke is a different subject - they can be related, though.

[@krx_kid9104]

@@gordowg1wg145 you're 100% correct. Thanks for catching that!

[@harrassmentpanda6736]

Just found out the truck I been driving for a year was bored before I bought it 😄.. I was like now I get why so many people think I race it cause it sounds minty

[@donloder1]

Jebuz christler, who's the new guy doing the sema insert?

[@kesu90]

What is the clearance for the mains and rod bearings?

[@angrys13]

I'd rock it in my 91 240sx coupe! But I'm curious, per the rules, why is it void in FL?

[@420pray4]

is there any way he could discuss how much it costs to get these things done at machine shop plz?

[@simeonrf7047]

i know most of the information already but i will never say no to a bit of supp supp

[@dopeylindstrom2236]

Can put it in my chevy traverse widen the stance and lift it to put in rear wheel drive

[@Matt_v427]

Do u guys do shipping I'm from India

[@burntchickennugget191]

It would be cool if you guys would have us send a vid of our engine we beat on and if its worthy of a replacement we can go over and build our own engine. Kinda like a "You build it and you keep it" kinda thing. Or maybe Im just stupid and would end up putting a crank bearing in backwards.

[@jwills818]

Anyone else notice that the intro is backwards? The cars are all in reverse haha

[@bigdfitness5020]

Never noticed that.

[@shamil808]

Now I'm going to see that during every intro. Thanks.

[@Galaxy-oj2lb]

I noticed that on the first one. I was wondering who else did.

[@brothelsprouts]

Drone footage tips and tricks 101 for dummies

[@faithleSs2k]

What's the song after Suppy's welcome?

[@user-ku5xw2zd4m]

Wait, he didn't torque down the caps dry to check tolerances with plastigauge?

[@TBendez]

Did you go back and remove all of that silicone/RTV overflow on the inside? That bead looked thicc and the final shots proved it was indeed very, very thicc.

[@davoupnya3202]

Suppy, do you know all motor Phong ?

[@bretthaynes1921]

Oddly want this more than a giveaway car lol

[@chewylewy1714]

Suppy forgot to say that the crosshatching also helps keep oil on the cylinder walls. I never heard that it helps with keeping compression though lmao

[@shaundone4242]

Man, Vinny looks different 😍😍

[@DiegoAlvarez-lf8us]

Yeah bro lmao I thought man had a weak chin or sum

[@shaundone4242]

@@DiegoAlvarez-lf8us thanks to dollar shave 😂😂

[@jrzamudio2743]

Is it just me or do other people want the names of the songs they use in they're videos, cuz those beats go hard 🔥

[@KL1PP3R]

How does this sound a K24 in a Subaru BAJA ? RWD ? Or keep the AWD ?

[@jayswisher575]

Hey what’s it mean when they say blueprinted.