Eastwood's DIY Polishing and Porting Cylinder Heads Kit

[Codythecartaker]

Awsome vid...im gunna port and polish my heads on my 357ci chevy 4x4...with a rebuild

[5BobbyDavis]

Oh yea,Good job fellow.

[5BobbyDavis]

It's as simple as this,when you get boogers built up in your nose,pick it.See there now, how much easier it is to breathe.

[spazmoso]

ive heard not to touch the intake side because it helps the atomazation of fuel?and the head i have is aluminum,but rough casting is present

[ragalyisp]

I use a piece of hose from a phillips attachment to the valve for the valve lapping

[PugMarshall2906]

Do you deliver to the UK?

[prophaniti1]

You do not use a drill to seat your valves, or you socket your head.

[gabe2000ify]

ok ok ok, so BASICLY you are making ALL the wholes bigger?

so im guessing after this job a need new biger valves, and springs? or how does this work, pls help

[zeppelin67637]

@gabe2000ify NO! do not grind the valve seats bigger lol Leave the bowl blending for a professional.

[kstinson]

@buddiiee So go to a junkyard and pull the heads off a 200k+ mile car and have a machine shop test them on your dime to prove your point. I promise you that you will fail. These durable engines didn't have equal ports. I will also promise you until they wore out the engine ran fine and was far from impossible to tune, heck it probably even passed emissions testing. I would leave aggressive porting to the pro's but a simple gasket match and cleanup can be done in the garage without flow tests

[michaelovitch]

@buddiiee

BULLSHIT

the stock heads are a full of imperfections from machinnig and casting

it's not a polish with sand paper wich will ruin "the life of your engine"

moreover a give you only the quantity of air flowing,not the way it's flowing wich is more important.

[shapashapA1]

@buddiiee In the video, the guy stated himself you are looking at 11cfm tops with a simple port polish.

If you have your car tuned to the point of 11cfm making a difference between blowing and not blowing then you better be able to afford a real shop to do this shit for you.

11cfm isn't that much, and if you stayed nearly the same for all cylinders you will never see more than a 2cfm difference.

Cheers keyboard commando.

[blakegorman69]

@shapashapA1 haha my friend had a blown 427 and he had the compression so high, that when he did get the heads ported, the extra CFM he gained boosted the comp. up too high and he blew both the heads at bout 4500 rpm.. lol

[malecki1887]

@blakegorman69 Flow doesn't change compression....

[blakegorman69]

@malecki1887 yes it can. more flow equals more air flowing into the chamber.. whick in turns makes it pull more gas into the chamber.. and that increases the power that is created because of the extra gas and air that it pulls in makes a bigger bang in the cylinder. thats more pressure on the heads and that little bit was enough to blow those heads.. i know it seems unreal, but its true. i cant believe just that little more did that..

[malecki1887]

@blakegorman69 Unless you start messing with the bowls it isn't going to change the compression ratio... A cylinder on a motor is no different than a syringe. It has one fixed cylinder size with on size stroke. regardless of the opening the cylinder only has so much area and will only draw in that much. So regardless of weather its a 2 inch opening or a 5 inch opening its going to pull the same volume. The only thing that changes is the amount of work and force required to do so.

[malecki1887]

The larger the opening or "increased flow" the less work it takes to draw the mass in. So All in all your just decreasing the loss of power consumed by the cylinder which in turn builds performance. It results in smoother revs and a "feel" of more power, when all it did was increase motor efficiency. However running forced induction changes this slightly, it does not change the fact porting heads does not change compression.

[piratebobstreasure]

@malecki1887 Ok, now I think I see where you are missing the point. The syringe is 100% efficient all the time, as it is not drawing through a lot of impediments, the engine is not. Porting allows it to inhale easier, which increases its efficiency and the cylinder pressure increasing is a by product of this increased efficiency. Also, engines can exceed 100% efficiency at certain RPM ranges due to the combination of parts selected and the porting job done. The syringe can't.

[malecki1887]

@piratebobstreasure Thank you summarizing what i said...Im done with this convo...

[piratebobstreasure]

@malecki1887 Fun debating with you. Bye!

[piratebobstreasure]

@malecki1887 Oh yes it does! Otherwise, what is the point of porting? Remember, there are two components to your compression ratio; static and dynamic. Static is arrived at when the proper measurements and mathematics have all been worked through. Dynamic is what the cylinder actually "sees" and is very dependent upon not only the flow characteristics of the heads, intake, and the carb if so equipped, but is also dependent upon the cam lift, overlap, lobe center-line and such.

[malecki1887]

@piratebobstreasure The increased flow only allows your engine to breath easier, and work more efficiently, but doesn't change you compression. Dont believe me? Go buy a syringe and do simple flow experiments i described in the previous posts. Or go ask a HiPo Machine Shop, Engine Builder, or hell even a high school physics student. I never mention the cam or carb or lope as these do not change static compression which is still tied to dynamic. Unless running FORCED INDUCTION

[piratebobstreasure]

@malecki1887 BTW, I AM an ENGINE builder, and a mechanical ENGINEER! The whole point of porting is to cram as much mix into the cylinder as possible in the time allotted, (i.e. intake valve open). What do you think happens to cylinder pressure when the mix ignites? It creates hundreds of lbs of force that push on the piston, etc. That too is a dynamic event, and the force exerted is dependent upon how much was crammed in there before it ignited.

[malecki1887]

@piratebobstreasure Sweet you figure someone whose a mechanical engineer could read...As i never said this didn't affect dynamic compression, my whole statement was it does not affect static compression, and just because you throw a set of ported heads on your not going to start blowing head gaskets all the time if the work was done right. Oh by the way im also a Mechanical Engineer and i overhaul design and work on Gas and Steam turbines. You know, the ones coupled to 750MW generators?

[malecki1887]

@piratebobstreasure Static dynamic are proportional to the amount of draw. However the only that things control compression are the diameter of the bore, length of the stroke, and the amount of cc available in the bowl of the head, and deck height. The flow passage (runner)of a head doesn't change any of those components. Those are simple facts. If you change the bowl you change compression. The point of porting your heads is to increase the flow of the runners.

[piratebobstreasure]

@malecki1887 If you leave the valve open too long, it lets some of the pressure escape during the compression stroke, viola, a dynamic change in compression ratio. Leaving the valve open just the correct amount of time will let all the pressure possible into the cylinder before any meaningful compression takes place, which increases cylinder pressure and is a dynamic compression change, can be made higher by porting, which increases the size of the tube flowing mix into the cylinder

[piratebobstreasure]

@malecki1887 Try this simple experiment: Using a screw in type compression gauge, take a reading on any cylinder by just cranking the engine over without allowing it to actually start. Record the reading. Next, start the engine and repeat. Compare readings. The engine running (dynamic) will usually be higher then then with the engine off (static). A change caused by dynamic forces only. Static is only figured mathematically and is not the real force seen by the running engine.

[ahhGroovymangroovy]

I have a question regarding the subject matter of this video to EastwoodCo or a representative. In the video he says to make sure you use the right gasket for marking the excess metal for example if you're putting headers on then use the headers gasket, but dosen't that suggest that if later on I decide to get different headers then i used after the port job, then my Port and polish job will be less affective seeing as how it's matched to that particular gasket's diameter? Thank you.

[Querencias7]

Excellent, very practical advise. Well taught, nicely done.  Porting work on heads is definitely worth the time -- providing it is done carefully and following instructions. Many thanks for sharing your expertise.

[m0nkey1eader]

Good video for DIY guys. A lot of things can be done without 1000s in equipment/labor.

Do your homework before trying this. Read up on what works well with your castings.

[m0nkey1eader]

@buddiiee using your finger is a bit sketchy as a measure. But don't overstate it. Your not going to blow your engine from a few CFM...

Bowl blending as well as removing casting imperfections are perfectly fine without a flow bench. If you are really careful not to remove excess material polishing that fine too.

I wouldn't use a drill to lap the valves though. No scientific reason, just seems a bit much.

[tunastrike11]

very good good to watch

[Chevymonster203]

@buddiiee They did a test on a factory small block head and found that there was a 10 to 20 cfm differnece in each intake runner from the next. So really you smoothing them out is really getting the intake runners closer than factory as long as you don't chop into them.

[michaelovitch]

@buddiiee

you don't always need flow bench or expensive tools.

a measuring tool like a bore caliper is enough to have a consistent job on each port.

the trick is to take the time and prepare your work with your brain and good books.

[rungassamydonovan47]

does the intake need to be ported to?

[dariodrag45]

WRITE THEM GOOD AFTERNOON FRIEND OF CARACAS VENEZUELA IS DARIO TO VALUE IS OK FOR A FEW POTEAR AFR HEADS FOR A FRIEND CHEY 434 QUI EN VENEZUELA'S A LOT OF PEOPLE WHO NEED TO DO THIS JOB PLEASE I NEED A FRIEND YOU PROMPT REPLY

[SuperMegaMan66]

Very nice video man I have a ford ranger 4.0l that I want to port and polish when it comes time to do replace the head gaskets. Thanks again!

[mkerna]

You don't chuck the valve in the drill for lapping! Unless you want to ruin the guides. Use a length of rubber tubing.

[antonyr123]

@buddiiee mark it against your gaskets and use our finger for feel for high and lows really.

[mostwantedracingteam]

nice vid.... very helpfull.. thanx

[RicerEater1978]

this may be a very stupid question, but at 0:47 when youre showing the cut off. can you get rid of that excess metal around where the valve stem goes in?

[TunedPortZ28]

@EastwoodCo We'll be the judge of that. How much for your head porting mandrel kit and carbides?  Im not talking a sloppy once over kit either, but a nice get it done to some of our tedious specifications type kit. More 40 and 80 grit rolls...etc.

[jerbearthegr8one]

You sound like your outa breath there old buddy also drill sounds like my damn dentists drill.

[civicmaneg6]

This is old school work back then their were no such thing as CNC shops a lot of hot rodder's did all their on work to their cars.

[RomeoReject23]

@civicmaneg6 Old-school, or budget conscience. Given that a CNC job on my V6 costs as much as my entire vehicle, I consider this method faaar more intelligent.

[ShaunDiener]

Great Video!!!!!

[LittleMan00707]

I am rebuilding my 4.3lt v6 engine and this is my first time doing one. Other then porting and polishing. Is there anything else I can do to save money for power or preformance? I am looking to do all work myself.

[1loudmouthpony]

very good video, makes it look very easy when its on a set of basic heads, but i would shake my self to disaster doing this to my trickflow heads haha

[aknowneemus]

best porting and polishing video i've seen yet.

[MrRobGT]

I wouldnt say "good" video, but ok. I DONT like the drill lapping without more protection to the valve stem, carbide is over kill for smoothing out, and he didn't say anything about porting the intake runner throat area. The kit would be better with the carbide bit included, also with some flexible shafts.

[waves2nice]

unless you have a flow bench and really, know what the hell your doing. I would leave porting and polishing a head to a pro. Unless you have a whole bunch laying around to replace

[rellyrichards]

@Edisonxl200r your right......thats what we do at our institue

[bigu]

very nice, I want to mess with my escort (bring some v6 power to that 4 banger) plus some other goodies :)

[NAMTRIP]

@bigu

I ported my 300 4.9 inline six banger,with eastwoods kit,Big difference,what a help

[milesaway1980]

@NAMTRIP

That's the exact engine I'm going to be working on.  How long did this take you? Any tips?

[Edisonxl200r]

Just a tips! on attaching the drill to the valve, what I do is..I use a fuel hose that tight fit on the valve stem, and a rod on the drill side. Hose acts as a flex joint and the valve rotates more smoothly. Hope I am right on how I do it?

[Mxrider2627]

good video

[noqcha]

nice video ..... thanks a lot.

[kraden18]

insane... thank you nice vid.

[karmaofspirit691971]

what about washing your head down of grit.

[seatun]

3:16 . . . that's not bowl blending *facepalm*

[TheWhizKidNumeroUno]

Is it safe to smooth out the casting flash that is in the square hole visible at 3:20???

[Ratstangrestoration]

These are Water Jackets, and no smoothening them out is not particularly important. In fact there are actually benefits of the sand Cast texture inside the water jackets. Simply because they allow the same flow of water to pick up more heat. thus pulling more heat from the head.

[jayrinaz]

Great tips!! im going to pull the heads off my mopar this weekend- thx eastwood guy!

[bonkster666]

ha hell yea a simple and pretty cheap way to make some gains. mopar is the shit