Just polish your head, don't port it!? Let's talk port finishes!

Let's be honest, humans LOVE shiny stuff. But, is the fluff and buff worth it in time and energy when it comes to a cylinder head? What is the right grit and why? We jump into these answers and debunk some myths about port finishes.

[@donnysouthwell8104]

We need subtitles

[@dub537h5]

I see why the video has less than 400 likes lol

[@GETLITUP69]

Lets see a dyno vid, just polish no porting.

[@headgames]

Do it! Tell us how it works out!

[@JSomerled]

Agree... it's all talk until you run it on a Lie detector (dyno)

[@Corona_Paul]

What the hell did he say? 😂

[@bainracing]

😂😂👌 classic, well done man

[@headgames]

@@bainracing thanks man!

[@BEAMERNOOB]

what about on direct injected engines?

[@Scavs_Inc]

So glad I stumbled into this video.

[@sweettooth80]

Blede boop yee haw

[@brian6029]

😆🤦👍👍

[@71firebird400]

How does direct injeciton respond to a "mirror finish"? Any gains to be had, or a waste of time?

[@n4thawin]

Nothing needs to be mirror finished. Even a slight texture is better than mirror polish.

[@rcamacho364]

Great laminar flow, probably no downside. The mirror finish hurts port injection and carb engines.

[@bryce_fa5si]

@@rcamacho364 hmm interesting I just did a nice finish on my intake side only my car Dynoed 225 so technically what your saying is if I re Dyno it it will make less power?

[@rcamacho364]

@@bryce_fa5si we're talking direct injection. If you have a port injection or carb and you did a good job on the port you'll make more than stock but the mirror finish will make it less than optional because it will pull fuel out of suspension. An 80 grit or so finish will slow air down at the wall so the rest of the column of air will glide on top of the trapped air and keep more fuel in suspension. There's more to it but I don't want to write 6 paragraphs on a KZbin reply. Go check out some good porting books it'll elaborate much more.

[@n4thawin]

😂😂🤣😂🤣