How to Port and Polish Your Cylinder Head

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If you plan on doing this process, set aside A LOT OF TIME because it will take alot longer than you think. Don’t plan on just taking a few hours to do this because you will be here for over a day 100% if you want to make the surface super smooth.
Having the right tools really makes doing the job a lot easier. I couldn’t even imaging trying to do all of this by hand. Before buying tools you don’t need, take a look at your cylinder head or whatever you’re working with, and see if you need the short vs. the long carbide bits. If what you are working with requires the long bits, than buy those, but you shouldn’t have to buy both of them if you’re just planning on doing this once. I bought the short ones to find out I needed the long ones. LEARN FROM MY MISTAKES :)
If you are interested in any of the items found in this video have a look at the affiliate links below. By purchasing items below, it helps my channel operate and brings more awesome content your ways, at NO ADDITIONAL COST TO YOU. Thank you all for your generous support!! 🖤
MINI Replacement Parts ▶︎ bit.ly/3O7ijTG
3M Tape ▶︎ goo.gl/5tsj1a
Olfa Blade ▶︎ goo.gl/y2SPLQ
Dremel 4300 Rotary Tool ▶︎ goo.gl/66zuNV
Dremel Flex Shaft 1/8” Attachment ▶︎ goo.gl/xzspEv
Dremel Tungsten Carbide Cutter 1/8” Bit ▶︎ goo.gl/zjSxPb
DeWalt 20V Hammer Drill ▶︎ goo.gl/CFux3P
Pneumatic Die Grinder ▶︎ goo.gl/U272pB
Tungsten Carbide 1/4” Bit Short (Set of 8) ▶︎ goo.gl/bhsdNS
Tungsten Carbide 1/4” Bit Long (Set of 4) ▶︎ goo.gl/KVX6gm
Tungsten Carbide 1/4” Bit Extra Long (Set of 1) ▶︎ goo.gl/KVX6gm
Spiral Sanding Rolls ▶︎ goo.gl/BY2YFz
Abrasive Buffing Wheel Set (Set of 40) ▶︎ goo.gl/wGSERh
Polishing Accessory Set (Set of 100) ▶︎ goo.gl/5RT4dx
Polishing Compound ▶︎ goo.gl/JFYdJB
Camera Used for this Video ▶︎ goo.gl/C1mN2C
Camera Used for Alternate Shots ▶︎ goo.gl/TN4ZgG
Don't forget to give it a like 👍 and follow 👣
milanmastracci RU-vid Channel / milanmastracci
milmast Instagram ▶︎ / milmast
If you have any questions, feel free to send me an email at milanmastracci@gmail.com. Thanks for watching!! :)

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Опубликовано:

30 апр 2018

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Комментарии : 148

@milanmastracci 6 лет назад

For the people getting triggered by my super smooth finish, you need to chill. The reason I'm saying this is because you're probably getting mad saying I'm doing something bad.. smooth surface + port injection = worse performance. Well your equation is wrong.. I have the smooth surface (CHECK), but instead of PFI, I have Direct Injection, which means I will indeed see better results when this build is done. You can think your opinion makes a difference on whether or not the air will flow better/ worse, but in reality, your opinion doesn't change physics. Sorry to burst your bubble #lovethehaters #potatosgonnapotate

@bchnts 6 лет назад

milanmastracci I was reading the comments and I was thinking the same thing direct injection and tfsi (most Vw have it ) with smooth surface actually perform better as you said

@jompazx1272 6 лет назад

Its never good with a mirror finish on the ports not even with direct injection. You want a rough finish because it creates a turbulent layer which will improve airflow think about the golfball the dimples in the golfball creates a turbulent layer witch makes it fly further the same apply to the ports a thin turbulent layer will increase flow. Some high end CNC will have a dimpled finish ground in to it exactly like a golf ball. When you port never use sandpaper finer than 80 grit

@mceperformance8978 6 лет назад

Without testing on a dyno (or flowbench) you'll never know for sure. The biggest restriction is the valve seat. That's where you're going to get the big gains. Polishing looks good though.

@mceperformance8978 6 лет назад

That's called the boundary layer. Polishing reduces the boundary layer (that's bad). Carry on. lol

@mannys9130 6 лет назад

The enlarging of the ports makes way more of a difference than the surface of the ports. Polished, rough, whatever. The difference is insignificant. Polishing makes the biggest difference for any future carbon buildup imo. It will be much easier to walnut blast any chocolate cake off a polished surface.

@Drzdevildog 6 лет назад

Looking beautiful!! Can't wait for the next video!

@Ajbane98 6 лет назад

Can't get enough of this series.

@IanLandesman 6 лет назад

You've put a lot of time and effort into this. I own an N14 MINI motor and if I did anything like this, it would immediately crap the bed. I hope your car runs a long time after all the work. Enjoy!

@steveclever5046 4 года назад

Thanks! Very helpful and saving a backyard mechanic time and money! love it that you are so straight to the point and clear on the process of each step! The real deal!!!!!!

@ArcAngel572nc 3 года назад

Gonna be costing you time and money if you follow this advice! Stick with the writings below the video and you'll get someplace. Follow the kid and you'll just go backwards.

@jarry4482 6 лет назад

Did it on Volvo 2.4 t5. I port from intake to exaust to gasket diameter. Polish everything, even piston and turbo exhaust inside chamber. Straight pipe V8 note sound 💯%. Keep up good tutorials. And let's port HATERS behinds🖖

@christofferlunoe1305 5 лет назад

Patience is the best and most important tool !

@glenburns4232 4 года назад

Awesome!very insiteful and well described.thanx man

@steveelliott9088 6 лет назад

Great information. Gonna do the same to mine. I had a misfire that wouldn't go away after walnut blasting...

@manibaudilio674 4 года назад

sand life ! sand everything and sand blast everything . i wanna see this mini run

@thetraindriver01 6 лет назад

Really nice work Milan it looks great 👍👍👍

@andytommykeddy3224 6 лет назад

Love the videos!!

@500bht 6 лет назад

Power gains will increase if you smooth the short radius on the exhaust & raise the roof but remember do not over widen the ports as this will decrease velocity.The area just below the valve seat is very important & must blend into the seat . smooth the valve guide boss around the base & shape the port diverters into a knife edge .Have the exhaust valves machined with a 30 degree back cut too . Also have the valve seats re cut when having the new guides installed . Great to see you doing this kinda work it's not easy and takes hours to do . Now you have the flow sorted it does not end there. fitting a high lift cam with a longer duration will bring it all together .

@mceperformance8978 6 лет назад

Back cutting the exhaust valves will improve flow (in BOTH directions). That invites reversion, which is bad, you don't want that.

@davidsmurf8559 6 лет назад

Excellent job. Keep it coming.

@AliA-jr3iv 6 лет назад

Loved it keep working

@davidrafael4232 6 лет назад

great work , i'm watching from romania , amazing videos sorry for bad english

@donatibb 6 лет назад

Nice job man your awesome

@vt2704 6 лет назад

Great job.

@mariustuvanu3884 6 лет назад

Excellent !

@ArcAngel572nc 4 года назад

Dude, that DeWalt drill is the way to go! I wouldn't waste my time using a professional die grinder that's small enough to see what I'm actually doing or fast enough to complete the job in a couple hours. I'd definitely use the drill and spend weeks rather than a die grinder and finish in hours. You can get the ports smoothener too! You're a fkin EXPERT!!

@Jenuin 5 лет назад

Thanks for the video. I'll be attempting this soon. Jeep build.

@ArcAngel572nc 4 года назад

Hell yeah! If you can't fk it correctly yourself then you should get in touch with this guy. I guarantee you that it will get fked up properly! Hes a pro!!

@Khan-ro8ct 6 лет назад

Good job

@berad187 2 года назад

Never knew smoother it is the better the flow of the air is they way this sounds it's like as if the flow of the air is water flowing through the passages

@discokitten5325 6 лет назад

An effort well done

@milanmastracci 6 лет назад

Thanks man :)

@patch8462 5 лет назад

1st I get where you and others are coming from and, really enjoy the enthusiasm! That said you and others are purely engaging based on assumption and repeating what others have said thru experimenting without, a full understand of the "physics" you are miss quoting. You are actually not improving flow, and you are not improving velocity yet nor are greatly altering it. Meaning the sporting part of the exercise is a very good start to anyone's growth so my hat is off to you for getting in there and trying! There are laws we can't ignore in physics which you haven't yet thought apply. What you are tooling at is fluid dynamics and over writing the physics! You need always have a plan, a way to measure and, without exception you must look at the complete picture in order to understand the gains and loses! Your valves will heat more than a set seating flowing thru ports un-tampered with! That means they will also stretch more! Now I've seeded some experience with you so please don't insist that I am wrong, I began doing this in the 70's . I have made my share of mistakes as well; It's all good and if you study up and read past page one you will someday be sharing your gains and loses, as well. All the best

@philistineau 5 лет назад

Patch You never took a class of fluid mechanics did you? Signed, an actual engineer.

@nathanwilliams7492 4 года назад

He has said MANY TIMES if you actually listen “theoretically” which laymen in terms means “when you think about it” which when you do, which you didn’t, you realize that there is also a difference between wet and dry runners and it’s common sense that when you have obstructions in a glow path, be they fluid or air, you will get turbulence when in turn reduces flow and velocity. So going back to the wet vs dry runner this is a dry runner setup being that it’s DFI you WILL see increased flow and velocity based on common sense and knowledge. I can’t believe someone who tries to sound so intelligent can’t see how through basic knowledge this will yield results on a flow bench I would put money behind it. It’s not rocket appliances 🚀

@ArcAngel572nc 4 года назад

This is what I like. Someone that knows what they're talking about rather than trying to be a RU-vid Expert and giving incorrect information which causes them to waste time and money ruining an engine because they had no clue what they're doing from watching a RU-vid Expert! People should stop trying to be teachers when they haven't even been to school themselves!!

@patch8462 4 года назад

@@nathanwilliams7492 There is a common term that is used when we butt into "common sense" arguments that make zero sense, it is called "not intuitive" which means it works opposite to what is anticipated! In this case Nathan, your common sense makes no sense for the intake ports. Sorry but that is just the way it is. Now as for the exhaust ports you can polish them it helps slow carbon buildup but the "in theory can make turbo spool faster" YIKES guys that more than a stretch of imagination.. lol

@patch8462 4 года назад

@@ArcAngel572nc Porting is a bit of black magic and does have its place, can produce some positive results however it can also produce some very negative ones as well. A for example there is much to learn about friction,say as in the example of these intake ports. Also there are many velocity tricks that are built into ports so, when someone is talking in general terms about high spots be ground out, there should be some cause for concern on how that is perceived by those without the understanding of WHY they may have been cast into place. That said I believe there is much to gain by experimenting providing you take the time to study up. Cheers Bobby

@Summitve 6 лет назад

Saludos desde caracas Venezuela broo

@bluefreckle21 6 лет назад

Hey Milan, thanks for all the great content. Just wondering if you've stopped working on the MINI. I know there's a lot of people looking forward to you wrapping up the build to see her on the track:-) I know you'd said you were working with ecs tuning to get some particular parts. Any status update?

@JAM4382 6 лет назад

I wouldn’t waste any time with those tiny dremel buffing wheels. That bag you showed of those “little foam pieces” work really well. If you use wd40 while you use them it helps; you can get a mirror finish with those. Competitionproducts.com has probably the best deal on them they are called cross buffs. I would use medium, fine, and very fine; also like I said before wd40 spray down the port you are working on and go to town. You can get a longer mandrel to use them on your drill. I prefer using an air powered die grinder (they are nice and small) but you need a pretty big air compressor to keep up with a die grinder. You are right about it being time consuming. A 4cyl head like that would take me a full 40hr work week. Anyway nice work and cool mini. I used to have a laser blue 2010 Mini Cooper S.

@Niko2515 6 лет назад

Keep up the great work!

@berniecruz8405 6 лет назад

Milan, What ever happened with this mini cooper? Didn't see a video of you putting the engine back together and back into the mini cooper engine bay. Would like to see how, if any, performance improvements due to all this work that you did on this cylinder block. Where are things at with the Mini Cooper?

@simoncousins6005 2 года назад

Did you port match the inlet and exhaust manifolds to the cylinder head? So as to eradicate any miss match/step in the joins?

@fulltonefulltone 5 лет назад

Bravo

@timozickel215 5 лет назад

Would you do this on a sucker engine too?

@ndk2k4 6 лет назад

So what you're saying is, size matters, use protection :D. On a serious note, do you think making those peaks in the exhaust ports so sharp going to make them heat up a lot more? I remember reading something a long time ago about head design and how they round that split area to help prevent heat buildup. I could be remembering it wrong.

@milanmastracci 6 лет назад

Yes you are correct. The more aggressive of a bend, the worse it will flow, which means the more heat will stay in the cylinder head. I did a bit of reshaping and 'shortened the floor' of the port instead of 'raising the roof'. I hope that makes sense :)

@500bht 6 лет назад

Just found the photo;s i took when i ported my r53 head i posted them on my google+page search (mini mechanic) . just thought i would share with you .

@CoyoteCarChannel 5 лет назад

“Casting flash” home bro

@visionmecanica5511 4 года назад

Wood job! Was the difference in power noticeable? How the engine behaved after that worked

@90210sky 3 года назад

Golf balls fly farther due to their dimples, and dimples are added to the bottom covers of exotic cars to avoid turbulances. I do not know about air flowing smoother if you polish the runners.

@OneCylinderProductions 6 лет назад

Click video...... instantly like

@johnmandrew4634 6 лет назад

Top work!!

@ArcAngel572nc 3 года назад

Are you kidding!? An idiot!

@thomastrotta7859 6 лет назад

Great work! You just need dual titanium valve springs. Lol.

@ArcAngel572nc 4 года назад

Shit, if I'm spending weeks to properly fk up a cylinder head with a drill then I'm certainly not going to stop at double titanium valve springs. I'm going to put Quad Titanium Valve Springs on my cylinder head!! ;)

@StormRoxas 6 лет назад

Have you figured out why you had the initial misfire that started you on this whole project? I have a 2010 r56 and I also had misfire nonsense. I got new coils, spark plugs, and I got my engine sand blasted and since then my MINI has run great

@milanmastracci 6 лет назад

Yes. Since the intake valves were so clogged up with carbon and oil, they could not make a proper seal which was causing nothing but problems for me. Hopefully with an Oil Catch can, and eventually a water methanol kit, I shouldn't ever have to worry about this problem again.. I would do a compression test to see if the engine is healthy, and then a leak down test to see if/where you have a leak :)

@Ottonic6 6 лет назад

Sounds logical. Reduce the air drag and turbulence to get a smooth, direct air flow... You said it will run/perform a lot better. Any idea on HP difference?

@milanmastracci 6 лет назад

10% more efficient, if not more!!

@hachi-rokuperformancegroup3987 6 лет назад

Dano C. Reducing turbulence is not good for fuel and air mixture and should be done with a higher hp motor with more work done to it or if running excessive boost. This can kill performance if not done correctly

@adrianedhouse5175 6 лет назад

So, do you prefer Coke or Pepsi when 'soda' blasting? or perhaps something more exotic like Rootbeer? :)

@milanmastracci 6 лет назад

Vanilla Coke works best ;)

@mceperformance8978 6 лет назад

Add some Jack Daniels, it's delicious!

@marcoruzza5100 6 лет назад

Can I apply the same procedure to cast iron instead of aluminum?

@ArcAngel572nc 4 года назад

Hell yeah! He can probably show you how to use a DeWalt drill to port a fkin Carbon Fiber cylinder head! He's a fkin PRO!!

@wizeboyz3606 6 лет назад

Yeeeehhhh!

@ryanscanlan9875 4 года назад

Very pro ma man. I'm about to do my HR upper & lower plenum. Did you feel a noticeable increase in performance?

@ArcAngel572nc 4 года назад

Hell yeah, he's a fkin PRO, my man! Are you kidding!? He spent weeks on those ports. It's not running but I'm sure he picked up 150hp on EACH cylinder! Hell yeah!! I've got to get me a damn PROFESSIONAL DeWalt DRILL for this shit. A damn shade tree die grinder does a shitty job too fkin fast!!

@eliasmelendez1271 3 года назад

What I do when port and polishing any direct port fuel injected engines, i sand down the intake ports and exhaust ports using 80grit than 120grit 240grit 600grit than last 1000grit but I wet sand with 1000grit. After that I polish both intake and exhaust ports to literally a mirror finish. On the combustion chamber if you just sand it down DON'T USE A BURR JUST SAND PAPER it will only drop the compression if you do it right by .3:1 that is less then half of a point. Thank you

@eliasmelendez1271 2 года назад

@port nut that's your opinion and it's fine i just like seeing my port work clean and shiny!! lol lmao seriously I just like seeing shiny

@Halsafe 6 лет назад

Ayee! I’m early 😅😅

@inkwizytor84 4 года назад

How big is yours garage?

@steveclever5046 4 года назад

I now feel confident that I can do this without going to the local machine shop!

@steveclever1 4 года назад

However as he says, it is best to have a machine shop do this for you.Paying the extra money for experience and the warranty factor of it being done is always more beneficial than possibly doing too much cuz you can never get it back

@MrHufsa 5 лет назад

15:40 nice crack in the valveseat

@mugshotmarley 5 лет назад

Ouch. Damn, that crack is huge. Oh well, there goes that head and all this "performance" work.

@nathanwilliams7492 4 года назад

Where?

@jfratis9081 2 года назад

Think I'll click on the video by the old guy who didn't buy his tools on amazon yesterday.

@Khan-ro8ct 6 лет назад

Wish to work with you

@BramBiesiekierski 6 лет назад

LOL. Putting a rotary burr in a drill.

@fluxcapacitor05 4 месяца назад

@15:40 , right valve runner, I think you have a cracked head sir...

@tdawg719 6 лет назад

I thought that on the intake side that the small imperfections work in the same way as the dimples in a golf ball do. They actually help the air flow through the head. Not sure if that’s true or not but I have heard that before. Anyone else hear this?

@hachi-rokuperformancegroup3987 6 лет назад

tdawg719 polishing intake side decreases turbulence which means the air and fuel wont mix like it should and will drastically reduces performance. This is something done to high performance builds not mild builds. If its not a high horsepower build or big boost you will hurt the performance. Any reputable engine builder will discourage you from doing this unless major upgrades have been done

@tdawg719 6 лет назад

Hachi-Roku Performance Group well considering the its direct injection.... I don’t think that’s correct

@hachi-rokuperformancegroup3987 6 лет назад

tdawg719 atomization is key but no need to ask or believe RU-vid people when you can research and get info from the pro's.

@milanmastracci 6 лет назад

That is correct when referring to PORT injection, where the fuel and air is mixed together in the intake runners, and then gets entered into the combustion chamber as one. My mini is NOT port injection..

@jompazx1272 6 лет назад

You dont want the cast finish you want 80 grit sandpaper finish or a nice filed surface or a golfball.

@xeroinfinity 5 лет назад

how many battery charges did you use? lol Die grinder makes short work of this. Ive done thousands of heads intakes etc and you arent going to add much to this engine. i'd just done a bigger turbo and injectors and a aftermarket ECU/PCM and a good tune.

@1stGenStunter 5 лет назад

james corvett “thousands” really? You must be old.

@xeroinfinity 5 лет назад

@@1stGenStunter , i guess you could say i was old. lol i owned my own shop for over 20 yrs, and was doing this work long before that.

@mceperformance8978 6 лет назад

You're pissing in the wind without a flowbench. Smoothing the surfaces gains you very little, you need to re-shape the short side and enlarge the bowls slightly. But again, without a flowbench, you have no idea weather you're helping or hurting it. (ask me how I know this)

@mceperformance8978 6 лет назад

One other point: You'd gain ALLOT more by doing a better valve job. The "restriction" is the valve seat 99% of the time. NOT the port surface/finish. Although polishing looks really fast, it doesn't do anything. I call this fluff-n-buff.

@mugshotmarley 5 лет назад

Check out the "performance" crack on the valve seat on the right @ 15:40. Ouch.

@bajanboyhood 4 года назад

Tape protect against a carbide bit???

@milanmastracci 4 года назад

Yes indeed.

@kimaniharris7922 6 лет назад

2:13 ;P that's what she said

@nathanwilliams7492 4 года назад

Kimani Harris bahahaaaa

@1276388 6 лет назад

Вери гуд

@BrendanPike001 6 лет назад

for real thought the thumbnail was a dog high on weed

@joshuaj.curtis766 6 лет назад

BrendanPike001 or Sid from ice age (movie) through binoculars

@johnnyasus86 5 лет назад

A deer

@varnishvarnish 5 лет назад

Did he smooth the short side radius? On a direct injection engine? Oh dear!

@icelover3 5 лет назад

Are you dumb, or are you trolling?

@ArcAngel572nc 4 года назад

@@icelover3 you're the kettle calling the pot black. You're a Professional too, right!? You probably don't know what the short side radius is. Wait, you just watched a fkin video and it made you an instant fkin expert. Fuckin RU-vid Idiots!!

@icelover3 4 года назад

@@ArcAngel572nc Buddy I've probably ported more heads than you, I know exactly what the short side radius is you goof. Try using one piece of punctuation if you're going to try and roast somebody, you wont look like as much of a fool.

@Runescape. 2 года назад

those cookie discs embed the engine with steel and aluminum oxides that contaminate it, they were recalled by GM for doing gasket cleaning due to this, do not use them!

@oviblue2632 6 лет назад

Insane right

@steveclever5046 4 года назад

than

@ArcAngel572nc 3 года назад

I've never heard the word "smoothening" but that's NOT what you do to an intake port! You want it to be "rough" so that the fuel is atomized better in most cases. I guess it would have some advantage in a port where the fuel isn't being passed through. I would definitely use the proper tools and not a hand drill.

@cakeisalie 5 лет назад

all that for 1HP?

@nathanwilliams7492 4 года назад

Along with throttle response, flow, increased fuel atomization which in turn increases total combustion so probably more than 1 measly hp

@hockeyandsoccer4ever 6 лет назад

Why

@oviblue2632 6 лет назад

When you put back the engine please put two turbos it's going too be awesome or a supercharger and a turbo

@hachi-rokuperformancegroup3987 6 лет назад

To smooth equals less turbulence and that's not always a good thing. Without turbulence in the air the air and fuel won't mix as good and you lose power.

@JonathanRodriguez-xx9yx 6 лет назад

yeah on a port injected engine but on this direct injection engine turbulence wont be a limiting factor since fuel never mixes in the port, only in the cylinder.

@hachi-rokuperformancegroup3987 6 лет назад

Jonathan Rodriguez true but it can affect velocity if your not making the engine suck in more air. Idk the exact build but it seems to be a mild build from what I've seen. Big port heads on a small cc engine loses power and torque on the low end and only helps it top end at higher rpm so depending on the application determines if its worth it or not. Port and polish usually isn't done till sanificant power is made over stock for this reason

@gedas3419 6 лет назад

I ported my m52b28 (bmw 328i e36) and i knew i can lose some low-end. But guess what? Only 10newton meters at 2500rpm. Ar 3k is where it is like stock, and after 3 to 7.5 (limiter) I only get gains. On top 50newtonmeters and 30hp+. Imagine if I add turbo to ported head...

@hachi-rokuperformancegroup3987 6 лет назад

Gedas Alekveravičius 30hp is a big gain.. Big cams bigger valves or basic bolt ons?

@gedas3419 6 лет назад

Hachi-Roku Performance Group no bolt ons. Also needed to add fuel by a retune, be'coz it went lean.

@jamesperreault4506 6 лет назад

talk about using the wrong tools to do a job

@diegobanuelos17 6 лет назад

How to decrease horsepower haha

@hachi-rokuperformancegroup3987 6 лет назад

Diego Banuelos intake needs some roughness but dude polished super smooth like the exhaust side but he got butthurt saying its direct injection so its ok but I don't think he understands what he is doing

@mceperformance8978 6 лет назад

YEP!

@ArcAngel572nc 3 года назад

Please don't anyone follow this lead unless you're intentionally trying to ruin a cylinder head.