"How To" Port polish an intake manifold

[ragerian1]

Nice job. If u did work on a d17a2 thatd b awesome i wana do exact same thing u did to mine

[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.

[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)

[stevetkocz]

Great vid keep it up ;0)

Now wheres my dremel......

[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?

[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.

[Nickc0528]

where do you get the dremel bits?

[amd64online]

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

[rdf1238]

Thanks Marshall!

[etsiej]

but with turbulence the air fuel mixes better so you will have a better combustion but if you do want tho have more horsepower you will need a turbo, larger combustion-chamber and bigger injectors so more fuel is added with a high compression ratio. that will give you 100 hp extra.. cost allot tho. :P

[BioZoooM]

Your head looks shiny.. did you polished it too? xD

[TeifiValley123]

Good job buddy. stuff like this is what Youtube is great for.

[britewired]

II'm doing it by hand now, at grit 800

[TheGambinoKid]

What size is the chuck on your dremel?

[yf2sv]

4A-GZE mr2 or corolla

[SuperJohncenarko]

is that a moonshine still in the back at 1:30???lol. thanks for the walk through/tips.

[BrentP636]

nice job...

[84poochdawg]

Wicked video! Thanks for the demo :) @curtknows -- electric motors power cars too dick! Lol quit trying to prove your knowledge-or lack thereof!

[DIOSpeedDemon]

EXCELLENT VIDEO MY FRIEND. YOU HAVE THE GIFT OF TEACHING. PLEASE MAKE MORE VIDEOS ON YOU CHOSEN SUBJECTS AND IGNORE THE MORONS WITH NEGATIVE COMMENTS. I HAVE 1450 VIDEOS AND I JUST LEARNED SOMETHING NEW WATCHING YOUR WORK. KEEP UP THE GOOD WORK!! RH DSD

[UCANTCATCHTHEBANDIT]

For all you honda dudes, and general retards (like the one that posted this video) porting is good, DO NOT POLISH THE INTAKE! porting and polishing the exhaust is a good idea though

[IwataSpraya]

great vid man..thanks alot...why only go 2 inches tho?

also if i make it smoother inside by using a finer grit..will that increase my gains?

[killdac]

safety... but I love breathing in aluminum dust... it's my favorite

[spinlessbastard1]

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

[Commrcldiver]

@spinlessbastard1 Thats funny.

[99XM]

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

HE GOES TO HELL THATS IT DUE TO ENGINE ASSANINATION.

[rotor13]

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

[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.

[MrOddish1000]

H.E.B.! xD



[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.

[sweetlikeADAM]

Very good video. I can tell you know what you're talking about, unlike a lot of the clowns doing How-Tos on YouTube.

[MrJesus702]

Great vid man learned alot!

[xstr33tr4cerx]

is it bad to go deeper into the runners or is it just a waste of time to go and do that..

[cksc2fast]

Nice job! I'm planning to try this out on a spare manifold before moving to my good one.

[alexaoo]

nice video bro



[sc2dave1]

polishing runners does nothing for power.it should be sort of rough,so that better mixture will be accomplished.

[shades2]

Thanks for stressing safety.

[kalabao52]

Removal the head is mandatory or you ruin your engine. Have you any videos of golf ball finish?

[mcflynguyen]

4agze ! great engine !!

great video too, learned a lot

[dsm44130]

good vid, but seems like the backround is more in focus than the intake

[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.

[Mr04fordranger]

ok. i have a question. is a 4Ajz same as a 2jz engine?? i know its a dumb question. but im into tuners but dont know much about jz series engines

[Commrcldiver]

@Mr04fordranger. No and the motor I am working on is a 4A-GZE. The 4A-GZE is a 1.6 liter 4 cylinder supercharged motor that was offered in the MR-2 in the US. The 2JZ-GTE motor is a 3.0 inline 6 twin turbocharged engine offered in the Supra in the US. Big diffrence. Good luck with getting in to sport tuning and the best advice I can give for anyone from the noobie to the seasoned pro is "If you don't know, Google it!" Thats what I do and it hasen't failed me yet.

[curtknows101]

@Commrcldiver The ENGINE on my windshield wipers is kinda weak any tips!!! Note the sarcasm, motors are not engines and vice versa, i wont let a soul who says i have a motor in my car even near it!!!! otherwise thumbs up:-D

[Commrcldiver]

@curtknows101 Ok, motors are powered by electricity and engines are powered by other means. Now that we have discussed my misuse of technical jargon, I would like to thank you for your comments and look forward to posting more videos in the future.

[curtknows101]

@Commrcldiver Your welcome:-D And nice video, was on here looking for help and searching for knowledge and experience and found all three in your video, Thank YOU, curtknows101

[UCANTCATCHTHEBANDIT]

@curtknows101 motors are not engines, but engines are motors by definition. They are technically also pumps by definition. fun fact fo yo ass

[curtknows101]

@UCANTCATCHTHEBANDIT Call it what you want, actually look up the definition, that is if you can spell either word, it all comes down to how they use the fuel provided to make power, an engine has to burn a fuel air mixture and convert it to energy, an electric motor uses the electrical power supplied to make power and doesnt change it in any form, fun fact fo yo ass also:-D

[UCANTCATCHTHEBANDIT]

@curtknows101 i love people who dont know shit that talk it, i just told you the definition your welcome for the lesson btw



[UCANTCATCHTHEBANDIT]

@curtknows101 and electric motors turn electricity into a magnetic force to turn the rotors dumb shit, thus a change in form.... another free lesson

[curtknows101]

@UCANTCATCHTHEBANDIT Thankyou for dumbshit, made me laugh after a bitch of a day, lol, :-D, but dont you mean electric engine??? There has to be a different word for different things so that we, you, and I, and the rest of the population can communicate and have an understanding of what is being said, so motors are electric, and engines power cars, trucks, buses, so on and so on, so thats really what it boils down to, you drive a pickup? do you call it a car?? Dumber shit!!!

[cuahtemoc1]

Good stuff

[GrueliusE30]

im doing this atm but ive got all these little pits (ovbiously casting flaws) but if i sand them out ill be enlarging the manifold significantly, can i fill them in somehow?

[Commrcldiver]

@GrueliusE30 You deffinately don't want to enlarge the runners too much. If it were me I wouldn't worry too much about the pits. I would trim them down a little and polish what is left.

[GrueliusE30]

ive only been using 80 grit paper wheels to grind so far, will go to the shops and get some 20-30grit wheels to get rid of all the pits, the runners are quite conservative (around 1mm all around the port extra) compared to the gasket and head, so if i even take .5mm extra ill be fine.

Worst case i do something not repairable ill just grab another manifold as this one seems to have alot of flaws.

[yeeeooop]

Good how to!! nicely done.

[Gruelius]

good video, just need to find one that shows porting  not just polishing

[bizkit24737]

whats up with that old ford in the back ground?

[Commrcldiver]

@bizkit24737 It's back on the road now after 3 years storage. New poly bushings all the way around, new shocks, runs like a top. I'll post a video soon! Good eye though!

[Kilen81]

Great video man, decided to try this on my car now.

[AyeItsMike]

Good video man, i was always a bit confused as to what i should do when polishing but you pretty much sorted it out for me, gonna have a go while my cars off the road, cheers.

Mike