"How To" Port polish an intake manifold

In this video I show you how to port polish an intake manifold. Remember to wear your safety gear and take your time. The intake itself took roughly 2 hours to polish. Removal of the head is recommended before any grinding or polishing to ensure none of the filings make it into the cylinder bore and cause damage to the cylinder walls.

Category:

Autos & Vehicles

Tags:

• Port
• polish
• intake
• Marshall C.

[spinlessbastard1]

this guy has never ported a "real" head in his life ,this is bitch stuff

[Commrcldiver]

@spinlessbastard1 Thats funny.

[tpvalley]

better atomization is acheived from turbulence, less turbulence allows fuel to fall out of the charge and cause fuel puddling especially at low rpm but does gain gas speed at high rpm. if u polish up draft of injectors then ignore the puddling part.

combustion will only be effected with better atomization or increased swirl apart from the improved volumetric efficiency at high rpm increasing pressure due to charge being denser.

did u notice a difference when driving? i bet it was the same!

[Commrcldiver]

@tpvalley This video was only the intake. Sure if you stopped with your intake alone you would not notice a diffrence in horsepower gains. When you combine the polish job on the intake, proper gasket matching and port polishing on the head, swirl polishing of the combustion chambers (do not enlarge more than 1 cc), and near mirror polishing of exaust ports you get some noticable HP gains in the mid to high RPM range. Gasket matching and port polishing does not help in the lower RPM range.

[MissouriSpecV]

Why should you only polish the first 2 to 2.5" of the runners?

[Commrcldiver]

@MissouriSpecV Some roughness in the runners is desirable to promote fuel atomization.

[Commrcldiver]

@dsm44130 Well in my defense, the video was shot off a $120 walmart camera and I was by myself. I'm sure the video would have come out better if I had a $10,000 HD camera and a production crew but hey, I used what I had. lol.

[codmaster00]

Give the guy a break I dont see anywhere in the title saying how to gain or double your horsepower hes just giving a little demo on whats involved to remove excess weld from the inside of the MANIFOLD

[miculito69]

Thank you very much Sir. Keep up the good job. God Bless You.

[rotor13]

@spinlessbastard1 he never mentioned porting a head, learn to LISTEN

[singlecam1000]

Nice but what if you make the intake manifold bigger on the head ? Would there be any problem ( I'm thinking on doing a h22 head)

[amd64online]

@Nickc0528 In Australia, from Bunnings, in USA, Home Depot.

[amd64online]

@gabster118 I would do the same as him. Your VX is N/A not turbo, so it needs a little roughness to help air swirl before the injectors. My Skyline on the other hand really wont see much (if any) improvement doing this as it's force inducted & the air charge wants to get the hell away from the turbo & into any hole it can (intake ports). On another note, many factory manifolds are designed very good, my RB25DET intake manifold/plenum can flow over 500 HP stock. Have fun.

[stevetkocz]

Great vid keep it up ;0)

Now wheres my dremel......

[99XM]

@spinlessbastard1 TRULY A BITCH IS DOING THINGS THE OTEHR WAY ROUND,

HE GOES TO HELL THATS IT DUE TO ENGINE ASSANINATION.

[gabster118]

I'am planning to polish the inside of my runners using a wire brush and rotary tool. I have a VX commodore with an 3.8 ecotec engine. My question is should I do the whole inside of the runners or only a bit at the entry like you did?

[Nickc0528]

where do you get the dremel bits?