▶️Skunk2 Ultra Race Intake Manifold Port & Polish "How To"🔧

▶️Skunk2 Ultra Race Intake Manifold Port & Polish "How To"🔧.Here I am porting & polishing a "Skunk2 Ultra Race" Intake Manifold. Sadly they come from the factory with a hefty price tag of $700-$1,200 depending on your optional spacer for the plenum. They also come with a ton of casting flaws such seen in the video.There are multiple ways to port & polish but I find this method the easiest for DIYers.
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Skunk2UltraRace #IntakePorting #Nthefastlane

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[@averyalexander2303]

The best part of this is that you can drink the soda when you are done.

[@ebay4dave]

nice work , simple and effective , and most of all cheap

[@staffitup]

God bless you man! Great videos keep up the good work!

[@kserieschris3543]

Just subscribed, looking forward to binge watching 🤙🏽

[@KookiePaladin]

Badass tricks!

[@dickydoodle8454]

Smoothing the bell part with the bottle may be benificial but the rest should remain rough

[@justadudewithacamera9096]

Junk2. I went with the edelbrock victor x manifold and it's awesome

[@8145dwerdna]

Instead of the rag on the socket trick, you could get one of those balls they use on wheels.

[@HEKTIC458]

Great vid!

[@Jporter6177]

i just watched a man. port a ultra mani with a 2 ltr

[@KINGHARGRAVE]

why not use meguiars compound and polish to really help make the insides slick

[@hiquality_distraction4084]

Nice video WD-40 works best for cutting/drilling aluminum. Also ninja-rig up a bit that will hold scotch brite pads. The depot has the best deal on these. The green first, then the blue last, then whatever you like! subbed.

[@kgatentumadre1312]

I understand you're using a 3/4 honing tool for the Ultra Race, But I have a Ultra Street. Can I still use a 3/4 honing tool or a smaller size? Any suggestion?

[@johnnym1320]

did you flow test the intake before and after to see if it does flow more?

[@danysperez-carrillo6630]

flow test, lol this man is a poor machines bro c'on

[@mixalisstathis274]

Let the weight of the filled bottle help doin' half the work for you - and if I'm allowed to suggest something, I propose to dip the front of the bottle in glue and the an abrasive quartz sand or korund, that'll make the job nice and easy.

[@jaysonrodriguez8783]

which is the grit of the hone cylinder 3 1/4?

[@joshtheking1772]

One thing to note here. You can actually do the same for exhaust manifolds also.

[@terran698]

very nice, any dyno numbers to you know make it worth your time/effort on a part your never going to see?

[@stevenyates715]

I was always told NOT to polish inlets!? The fuel can fall out of suspension in a polished port but a coarse port this cannot happen. I always polish exhaust ports to the max! This also includes the combustions chamber, with exhaust ports I don't take any valve guide off, just round it a little, at hi-revs the valves can dance around a bit causing compression loss...:)

[@all4bspinnin311]

This is not true as fuel is injected typically at the end of the intake runner. Most of what you're referring to takes place inside the port on the head and in the combustion chamber itself. Not in the intake manifold. Cylinder head ports, even ported cnc'd ones have small ridges that allow the fuel to atomize properly. With an intake manifold, you should always go for a mirror finish to help with port velocity.

[@madjimms]

Not true at all, mirror finish removes the tiny bumps and reduces air velocity. Look at the mythbusters episode with golf ball car. Intakes are the opposite (unless you make thousands of tiny dimples like a few drag strip guys have) the spots between the bumps create a pocket of reduced pressure and help acceleration and thus velocity. Its like first year physics.

[@all4bspinnin311]

I disagree. I've tested several intake manifolds first hand. Stock, ported, and extrude honed and the extrude honed manifold had the highest velocity. It was the most smooth of the 3. Dont confuse intake chamber physics with manifolds.

[@RSXEEaznPEELOUT]

I feel like why skunk2 leaves the casting messy is because they know we're just gonna grind the shit out of 'em anyway

[@philippebrousseau816]

What grit is the hone tool? thank you!

[@emmanuelolivoalmanzar9208]

How is it call, the polisher he used for the inner intake, the one with the machine...?

[@gersonhays7768]

Emmanuel Olivo Almanzar it’s a ball hone

[@lsengines]

It will flow better, but what about the power? Better flow isn't always mean higher power. Intake manifold also needs turbulence to mix the fuel mixture better. Of course bigger casting lumps should be removed.. ..it would be interesting to see dynoresults between completely polished vs. semi-polished intake manifold..

[@volkerdorr8537]

Nice work, but polishing won't improve anything as the air will "stick" to the surface, causing a laminar flow close to the surface. In fact this will increase the fluid friction in this areas. Other than that, a certain roughness will cause microscopic swirls, acting like rollers to the gas flow inside the ports. This phenomenon is known as the "shark skin effect" But I guess that there won't be any difference to be experienced at all, because the greatest restriction in air- flow will probably be elswhere anyway. (mostly in the valve- seat area) The most important issue with the manifold is the connection between head and ports. This needs to be flush with no edges or sealings protruding into the channels. But anyway: Some good ideas to use the bottle and the honing- tool to remove the rough imperfections! Nice job though.

[@ELL23OPC]

What was the tool you used in the drill? I've never seen one before

[@Nthefastlane]

They're called flex hones. I'll have the shopping cart back up later this week with everything I used in this video. Old link seems to be down.

[@SirCavemaninthewest]

So if the ports are square shaped? I must use a square bottle.. hmm

[@frdbtr]

What is the grit on your hone?

[@TheSamped]

Was the bottle full ?

[@Nthefastlane]

+TheSamped Yes.

[@Cheesehunter22]

i am realy intrestid in if it makes any difrents in hp wise

[@averyalexander2303]

Great video as always. How much power do you think you gained, I would guess maybe 1 HP, if it is even measurable. Please do not take this as offensive, but In my opinion this is a waste of time.

[@wombatonsteroids]

Power isn't so much the point, delivery is. Porting/polishing an intake manifold, even if it doesn't yield a large HP gain on the top end, will help it breath better especially in light/moderate throttle situations and lower in the RPM band.

[@OpenLogicEFI]

Avery Alexander I don't think it would yield any peak horsepower at all, but something like this would be an extreme help where the power band starts to fall at higher RPMs lengthening the Power Band past Peak horsepower.. people forget that the peak horsepower is not the only defining Factor. great job on the manifold all the way I would have left some roughness for heat displacement I would have skipped the final polishing step..

[@benhollinger2638]

I agree, when I think of a ported and polished engine, I think of quick revs and clean burns. If you wanna make more HP you gotta move more air and burn more fuel. these techniques seem best for defining a power band. theses techs. work well on 2 stroke motors.

[@2strokeFORever]

amazing. spend 800 on a manifold justnto see casting flaws like that. wow

[@jasonkehoe6633]

you polish exhaust not intake as you need turbulence to mix the air fuel mixture ????

[@turbo3oh]

Ehh that's debatable. Doing so would make more sense in a carbureted engine since the air fuel mixture has to travel the entire length of the runners. Since mfi engines inject fuel directly into the intake ports or the back of the valves. Manufacturers use combustion chamber design, vvt events, injector design and or piston design to create turbulence.

[@jasonkehoe6633]

Air fuel mix is essential carb or injection all injection does is measure out the fuel according to the read out of the o2 sensor as to what is burnt and what is left over . if the air moving over or under the inlet manifold is moving quicker than the fuel being injected you get blow by and over fueling causing higher running costs and less power

[@pszresonation]

Does that not deal more with carb than fuel injection. The ecu should control that by the o2, maf and/or the map senors.. and adjust accordingly.

[@Nthefastlane]

Jason Kehoe basically you kind of want to leave the cylinder head intake ports alone, but the intake manifold itself can be polished smooth because that's the air that comes in right before the intake ports where the injectors are. I've heard a bit of theory about a certain grit on the intake ports.

[@tiagorocco12]

GOD bless your life man!!! JESUS loves you soo much

[@Nthefastlane]

He Loves you to Bud.

[@dannyb20vtec28]

hey bro,really like the vids!! I have a question, I have a b16 head and would like to port and polish the intake and exhaust runners.what grit sand paper should I try it with? thanks man!

[@D250Rocks]

never polish the intake side. you want the air to tumble in the manifold. you can port it yes but you only port and polish the exhaust side

[@dannyb20vtec28]

Great thanks man!

[@supersevenn]

+danny tapia dont listen to bad advice, polish it up as much as you want. On the head in the area where the injector will spray the fuel, thats the part you dont polish to avoid fuel puddling at low revs

[@Nthefastlane]

To anyone that is interested in the DYNO numbers: kzbin.info/www/bejne/bHfChJZuerSFjJI

[@MrAJDavis83]

do you have to worry about rust?

[@Moist_Handshakes]

+Andrew Davis No, that's aluminum. It will oxidize, but it's pretty resistant to it.

[@MrAJDavis83]

Could you use a ceramic coating or not worth the price? I'm just curious.

[@Moist_Handshakes]

You could coat for the look if you wanted.

[@pacific7775]

I didnt realize skunk 2 had such low quality .. thats a top dollar manifold with knock off quality ... iv actually seen aebs knock off manis with better quality ...that shoukd be a cheapie part

[@Nthefastlane]

I know right. You'd think they would have cnc-machined all the ports.

[@pikisoo]

From the producers of donkey ricer

[@wunfstsrt7716]

No offence great DIYS for polishing it but 4piston racing sells these already CNC ported for a 50+cfm gain in air flow.

[@emanambitious8651]

but for an up the add price I bet

[@pablosantiago2357]

Where u get the wire

[@Nthefastlane]

astore.amazon.com/nthefastlaneshoppingcart-20?_encoding=UTF8&node=49

[@jamesneal6090]

Can I use the same size grit and everything on my type r manifold?

[@Nthefastlane]

Yes.

[@عبدالرحمنعليأحمدالسفري]

👌👾

[@andersonmoore3652]

Suzuki1982 1000cc miss firing

[@konradnee844]

This polishing will pretty much show no results on the dyno at all.

[@EdwardAlcala]

Yeah, if it was the compete head it'd be better.

[@pablosantiago2357]

Wire brush

[@jamesneal6090]

@nthefastlane

[@dynaway]

mirror finish??? is not good.

[@madjimms]

The casting isn't polished because the tiny bumps increase air velocity... Like a reverse golf ball.

[@mororaph6046]

Ideally the best is not polished but port and let a light "grain" finish but the heavy grain of stock bolt on parts aren't good at all. The tiny bumps are here because of the manufactured injected molding. ( sorry for my english )

[@denniscarparts2294]

all that for only 1.5 more HP

[@averyalexander2303]

Why not just buy something that is not an expensive POS?

[@boostismagic]

😆

[@jlehm]

holy hell dude...you need to get your terminology straight.

[@jlehm]

it's a velocity stack, not velocity. They're casting marks, not casting. it's in the throat, not in the velocity. I could go on and on.

[@Mk-cd1dd]

jlehm 1982 u know what he ment didnt u?

[@nezerac]

You gotta be a dummy to pay anything near 700 bucks for an intake manifold that isn't polished. for fucks sake. This is why all the manufacturers switched to plastic intake manis. It's already smooth after the casting process. Also what does this do to inlet temps?

[@wombatonsteroids]

If anything, inlet temps would drop because there would be less friction/resistance on the air as it's passing through the intake.

[@nezerac]

newpa1n Ya but it's pulling air from directly under the hood.

[@wombatonsteroids]

nezerac No, that's not how these intakes work. He has the plenum opened to show the ports, you attach a single throttle body to these intakes and then you can route the actual piping wherever you want. Look into the Hybrid-Racing/Ktuned cold air intake systems.

[@averyalexander2303]

nezerac No, they switched to plastic because it is cheaper.

[@nezerac]

Avery Alexander No...plastic is better for managing heat. I'm looking to be an engineer. Trust me. It's because of power not cost.

[@jasonbourne6531]

i have and idea.. instead of wasting 700-800 dollar on poor quality skunk product. . just got another brand with better quality and save all the unnecessary work

[@BSon-sj9uc]

but..but.. but its the ultra series.

[@averyalexander2303]

Jason Bourne I like your idea.

[@averyalexander2303]

but..but.. but it's an expensive POS

[@rickyr7790]

There is no other off the shelf plenum with the volume and modularity in this price range. Many pro teams have success with this thing

[@scottgolden2766]

What engine does it go on?