How To Save Money By Port & Polishing Stock Cylinder Heads - Horsepower S15, E2
2021 ж. 2 Қаз.
718 620 Рет қаралды
New high performance aluminum cylinder heads make great power. But, Horsepower has a much cheaper means to the same end. We'll show you how to port and polish your car's stock heads and spend less than a hundred bucks! It's step-by-step tutorial that you can handle at home. It just could be your biggest bang for the buck ever!
They should have flow tested that dirty old head, then hot tanked them and flow tested them again and then flow test them after all the port and polish work. I thinking it would have added a great deal of information as to what to expect between "as cast and dirty", "as cast and cleaned", and then ported and polished flow numbers. Seeing the difference in the cfm flow would have been a great way to show (prove) the benefits of the work.
I totally agree brother
It would also be good to see what effect port matching the intake had on flow. Results are inconsistent from what I've seen and read. Some say it makes no difference. Some say they've seen losses after port matching.
Hell yeah brother!
I agree! I mean they sure did spend a lot of time advertising for Mr. Gasket and Matco, which is fine, but we want to see data!!
Yeah, was expecting before and after dynos... like when Steve Dulcich added 90 HP with porting in a David Freiberger video...
The welding wire to measure is actually a good tip. Nice work.
I have been reading Hotrod since 1962. Back then, this was the way things were done as machine work and labor was expensive. Anyone can spend cubic money to achieve these results, but the true hotrodder does what he can and saves money at the same time. Great video.
machine work is still expensive!! I am for sure going the DIY route
Yes and fun doing it.
50 years ago I put 5 hp Briggs and Stratton valves in a 3 hp Briggs and Stratton engine and milled the head on my dads sander in his woodshop, to hop up my mini bike, ended up kicking but on those Honda mini trails, years later I put Chevy Corvette valves in my ford 289 heads and ported it like this video, it turned my Mustang on big time.
Good ol days when people actually worked on their own cars
No you didnt
@@johnathonmounce2265 ya viper heads on my honda. Lol
Good to see you guys on a great show. Thanks for keeping us on the know
Loved it, I appreciate the effort and time taken to discuss reasons why and what to do when it comes to P&P. Enough so, that I'd take a chance on giving it a go myself. Sometimes it's not about professional machining. Rather, the skills you gain from DIY'ing. I really enjoy your channel, keep it up guys.
Used to watch these two guys on car TV channel and they are two of the best I've watched ,enjoy their work
This is a great video. Thanks so much for making and posting.
Nice one!! Some flow or even just dyno tests had been amazing
As always totally awesome content sure miss you guys on TV! Big fan love you guys!
I'm gonna have this done on my DOHC Saturn heads too, but not gonna go past a stage one plus polished combustion chambers on my .20 over hyper piston build, just to increase velocity and to smooth the factor imperfections in the castings as far as the head goes, etc. Great Video!!
Glad i found this video, ive got the heads off my sbc 350 and want to do exactly this. Thanks, guys, for a very descriptive video
I used to build racing 2 stroke engines and got to know porting very well. Never did a car engine but by looking at the set of heads on my dads 289 Ford sitting on the bench there’s some pretty rough casting on those things. He’s gonna have me smooth them up. I got all the tools, looks like I can get most or all of it with just a straight pencil grinder. Doing transfers on 2 stroke jugs you need 90 degree or at least 45 degree pencil grinders. I even have a smaller one you would typically see used at the dentist for chamfering edges and tight corners. Looks like fun, we have a flow bench at work in the engineering lab and I might see if I can slip the manager a $50 and bring the heads in on a Saturday for shits and giggles.
Hey Jen....if you could could you post some flow numbers? Just curious.
@@gregallen9065 that would be interesting to see, especially if he could have the before numbers.
Awesome tutorial. You guys explained this so as anybody can follow along..... that's the sign of a great teacher right there so, Thank you guys.
Best port and polish video I've seen yet! You guys are amazing!
at a swapmeet i got a set of Dodge 340 X heads bear. ported and polished them myself, then had a friend that owns a head shop finish them. put them on my 360 that i put back in a 79 step-side. i could really feel the difference from med to high RPM rang. it really is worth the time to do it, if ur ;looking for something alil better than stock. going for HP. buy better aftermarket heads.
I worked in a foundry as a young man as a casting finisher. On our lunch hours we worked on a guys engine to port and polish it. We took it to the limits by polishing the rocker valley for oil return. We polished the entire block inside and out as well! Did the same for the intake manifold but it was aluminum. The best lubrication for working aluminum is beeswax. 1966
I'm tearing down a Chevy 350 boat engine right now and I was just going to have the heads machined to go back on as-is but now I'm considering a port and polish just because- hell, why not?!
Whatever you do just remember marine engines have different specifications than automotive engines! Also most of the components on the engine are regulated by the USCG, Not to mention that using automotive grade parts is extremely dangerous, foolish and can cause some serious issues! When I rebuilt my marine engine I just did a little cleaning and port matching to my cylinder heads! I rebuilt my engine when I purchased my boat in 1995, It is a 1987 GM 4.3L with a two barrel carburetor! Now it is a 4.3L with a little head work, upgraded valve train,small cam, Rochester Quadra jet and headers! And now because of the increase in horsepower and torque I was able to change from a aluminum prop to a bigger stainless steel! If you can do the work yourself it is most definitely worth it! You may ask why install headers on a V6, Because about 21 years ago OMC stopped producing the 4.3L one piece manifolds and no one was producing 4.3L OMC 1 piece aftermarket manifolds yet! My boat was high and dry on the trailer for two years while OMC was giving me the runaround, Then someone told me about a company in Australia that makes direct replacement stainless steel headers for almost all of your marine engines! Those headers we’re worth every penny, They have been on my boat for about 15 years and still look like they were just installed! I live in New Jersey and my boat is docked in salt water all summer every summer and I use the boat every weekend! If you ever have to replace manifolds I suggest you check out this company, Hi-Tek Marine! They are much lighter, take up less room, lower engine compartment temperatures and you will notice horsepower gains and a decrease in fuel consumption! Not to mention you will never have to replace your risers or manifolds again! I have no affiliation with the company I am just a mechanic who was lucky enough to be raised by my grandparents who has a beach house with a boat, And when I come across a product that performs above and beyond expectations I like to pass on the information! Good luck
@@NeverEnoughPyro40 aq1q1qq
a 3 angle valve job wouldn't cost that much more
2 things top list, windage try in oil pan, seen many automotive engines put in boats oil splash kills them quick,have engine balanced a smooth engine is a great way for long-term trouble free performance ,found excellent info here also,also, another video is Head Bytes,,in tenn.older gentleman lot experience ,high volume oil pumps with added dump fittings on back valve covers to oil pan bigger better gets oil back to pump quicker, HV oil pumps can an will suck oil pan dry without
Great Information... Thanks for Sharing
"you don't have to worry about an old stud pulling out" can be taken 2 ways. 😀
Thats what she said 🤣🤣🤣🤣
unless you have stripped the threads.
Please elaborate as I am young and niave in the ways of the world.
Great tips for a beginner and fun to watch. I thought the porting advice was good, but I would have mentioned that more runner volume might give you more flow, but less power, depending on the head, so don't go nuts hogging it out. Velocity matters. I also protect the seats with duct tape. Enjoyed the video!
I used to watch this every Saturday
Great video.. i really enjoyed the tips
I hand ported some cast iron heads on a 5 liter Aussie V8 fitted LT1 springs and stage 3 cam and its livened the engine up massively woke it right up ,pulled way better then stock i polished the backs of the valves to mirror finish
I use one of the worst worn valves and drill thread holes close on the O. D. Using a shop vac modified with a flow control port, and a clear plastic cylinder, the threads will visually show where and how the flow looks around the valve circumference.
Some of those pads have aluminum oxide in them and will wipe out your bearings. Keep it clean.
I wasn’t expecting the mL measurement of the chambers after porting and polish. Simple and useful. I was expecting a flowbench test to measure the reduced airflow losses.
Excellent video fellows. Thank you.
You want the exhaust ports to be slightly smaller than your header tubes, this helps at low rpms with sucking exhaust back in.
Exactly what I did with my 461'sexcept I went a bit per David David vizzard 's recommendations with a little smokey yunick tech. 5 angle seats and pockets . 1.6 exhaust and hardened seats for the new gas that was on it's way in 1991.
Muito obrigado pelos seus vídeos. Um sonho poder trabalhar com isto.!!! VALEU.!!!!
Cool video and thanks for all of these great tips! One question please, where did Mike say he got those safety glasses again?? Thanks in advance!!
I see he learned his lesson when it comes to proper eye protection!
Just yesterday I was using a pneumatic cut-off wheel on metal. The wheel broke in half at full rpm and flung half the wheel right at my chest. I was wearing a t shirt and It broke the skin a little but no real injury to speak of. Now, I was wearing eye protection but can you imagine that piece hitting an unprotected eye?!?!?! Eye protection is cheap and easy. No legitimate reason to not wear it. Same goes for hearing protection. All the lawn mowing I did as a kid all summer long......no one ever thought about hearing protection. I have mild tinnitus and I really think it had to do with that. Hours upon hours of mowing with no hearing protection.
A dremel tool cutoff wheel can be really wild when it flies apart at full speed as well
@@mindeloman Just had that happen to me a month ago. I did have protection on ,and the broken cut off wheel flew past my head close enough to feel it nic my ear.
I was a pipe welder for the last 13yrs. I have seen quite a few 4" cutting disc stuck in people's faces! Face shield up!!
Running to pick and pull to get me some heads tomorrow
I ported my X20XEV exhaust, but I made the intakes rougher, to mix the fuel / air better. The improvement was 40HP!!
Very good work!💸
There is alot that goes into p&p head work etc. He said 10-12 hrs im thinkin i wish, for me its upwards of a week for boths heads but thats taking alot of caution and making sure my hands are steady and im propped good and taking my time doing a little at a time keeping close eye on what im doing with no interruptions.
Always great to take 2 weeks slowly that 2 days rush it then find out. Hope it's going great for you =)
The amount of time various by how extensive the porting is and how complex the job is.
I am a rue believer in PPE, and this video actually got me excited about sponsored eye protection. The head stuff was cool too, I guess.
You'd be surprised how much you can port and not see any gains whatsoever. Spend the $250 on a good valve job and bowl blend. That's where the power is.
This is incredibly American in the way its presented
The most important tool is a very expensive air compressor. That die grinder will empty tanks in a hurry.
Great video
I like how he tells you what kind of “fun stuff” you can spend your money on! 😂
Actually the oil build up in the cylinders HELPS the porting bit port faster as it actually prevents the bit from clogging abd over heating...
50 years ago I wanted to get into porting but all I had was a file and a brain and maybe some measuring tools which wasn't much and I tried to Port a lawn mower engine then back in the early eighties I started doing machine work at home and I started porting heads in the 80s it takes several hours to do heads you can't do it in 2 hours or 4 hours it basically takes about three days to do it right to totally port a set of heads right all the ports and maybe do flowing takes 40 hours if you were doing it right
That was great!
Didn’t even know about this option. You really don’t know what you don’t know. Starting this week .
I would add a catch can in the line between the cover and exhaust.
Everyone else notices that these shows are 85% commercial right?
This guy isn't going to give you good advise. Been watching him for years. This video talks about gasket matching. What about the intake or exhaust manifolds? The gasket doesn't determine porting, the manifold does. Good baseline though. And you want your exhaust ports smaller than the primary tubes. Don't fuck your heads up. just saying, This shit takes hundreds of hours to master. Notice that there aren't any before or after flow bench tests. Even though he has the resources.
He covered the intake manifold matching. But yeah, not exh manifold. He also didn't talk about how far to stay away from the valve seats. People need to watch the Eric Weingartner vid on what not to do...
Nailed it. I always wonder how much time and money these guys have cost their viewers over the years of crap tech advice.
I mean we are talking about dudes using scotchbrite pads on a grinder risking chewing up the surface. If you look when he is polishing the combustion chamber he does hit the head gasket mating surface. Not that it is that big of a deal but the little stuff goes a long way.
It's a half hour show. He smoothed the exhaust port, cleaned up any obvious casting flaws, and basically indexed the ports to the gasket. This will help most engines in most street applications. More than that requires a lot more engine info and some interesting physics.
Sure it was a half hour show. I don't know what that has to do with anything. It probably took them 10 hours to shoot it. Have you ever ported anything? I have. My point is that, this guy attracts an audience of wannabes by making shit look way more simple than it is. Making people confident that a half hour video is all you need to understand what you're doing and that it's just that easy. They are selling a show. not viable training by any means. I'd bet he trashed those heads in the process while acting like it's a leisurely afternoon activity.
Love it!!
That's what I call daytime TV!
GOTTA LOVE THE ROCKER ARM NUT FALLING OUT OF THE INTAKE PORT WHEN THEY PULLED THAT LAST VALVE OUT HAHAHAHA QUALITY IS JOB ONE
The cross sectional area of a port is far more important than cc volume. CC volume is almost completely irrelevant.
Hey, Hey… Don’t confuse these guys
Velocity counts aswell
Pretty cool!
Awsome segments guy's, 💪 pls tell me, Is their any way of balenceing the rods to the crank at home. Mike
Wooooo si quieres más caballos pará tu motor estos amigos son los indicados 💪😎🍺
I would love to go to school for this
There may be a radis under the screw in stud that you must match in the head or it will rock.
Oh my I have been a technician for over 17 years and I would never put the face of a head down on a metal grate
So ik these are very common trash heads but my 350sbc has the 76cc cast iron heads and when I ported and polished them from intake,heads,to the headers. I gained about 13ccs of flow,haven't tested the HP I gained but it all adds up
Once I made similar crankcase vent system in my turbodiesel BMW. I even made it theoretically better by putting a double 45° pipe ~10cm inside the (freeflow) exhaust, so it should've work like a carburetor jet. No... It made an opposite effect. Exhaust gases were pushing towards the crankcase.
Then you didn't have a check valve. They are one way.
@@Velislide yep I didn't, but there none in carburetors too. It simply wasn't doing the job.
I don't think you understand how positive pressure works.@@TransAmDrifter
@@Velislide yep, there's no positive pressure in a carburetor channel.
Great advice I have been doing this since 1973 Toyota Corolla 1600 2TC 8000 rpm . 1982 2.8 v6 carburetor a ton of porting 270 280 cam roller tip rockers radar got my Turkish friend at 196 mph. 5.0 Florida mustang state trooper gave him ticket 385.00 with speed 162.5 mph. Some 20 years ago. Cost of parts 350. USD
You have the big engine. Back then my 77 Corolla had the 1100. I've had 14 Toyotas since 1975 Still have the 75 ST Celica (43,000mi), 76 GT Celica (over 700,000mi) now has an LS. And a 80 long bed Hilux 4x4 (over 450,000) it's on its third engine. 22R Stroker , 40 over, with LCE stage 2 head.
You all should do a dyno on a stock motor with out port and polish compared to having heads and or intake ported and polished after and see what the real difference is with air flow and hp
I was hoping they were going to do that! I've looked everywhere don't want to do it it's hard I'm not sure if wiengardener did it. If you find something send me a link!
An excellent educational video. I love engines and have some basic tools. I like mirror finish and to work sitting down is a triple home run for me. A great way to make some money P/T in engines shop. Thanks from Brookfield Ct.
Would this stuff also be applicable to German cars. I’ve got an 2013 Audi S8, I bought a ecu and tcu map, RS7 RS turbos and I’m getting a custom built exhaust.
I got a 307 for free, can’t mess up a boat anchor so let’s give it a shot!
have you used the milwaukee m12 die grinders .. ? they seem really good ..
Would an evac system be okay to do on a daily driver engine?
My hubby turns his burrs into a piece of ivory bar soap,its less messy than WD 40 . And keeps aluminum from sticking to the burrs !
Should I have to upgrade camshaft after porting head?
A parts list and link in the description would be helpful.
Anyone seen these guys with their fingers dirty, no chance welcome to the real world of DIY mechanics
I decent 3 angle valve job and re size of the throat's would make more power than any any of the mods shown here.
dont forget to include the price of a new head and intake. because guarantee a first timer is going to screw them up. everyone thinks it's so easy, I've got news for you grinder control is the hardest part next is keeping straight lines followed by surface finish. oh and dont forget to put a surface in the budget, to get rid of the grinder gouge when the cutter jumps out of the port and skids across the deck
Or just find junk heads and practice.
I feel like I'm a kid again watching gears, 4x4, muscle car mornings good ol days
I absolutely LOVE this video, very detailed . The only thing i wish you would have listed the exact tools your using like what size compressor what dremel and all the tips and such
A flow before and after would have been nice
Love you petrolheads
What if your engine is mostly stock can you still use that pressure release kit that hooks to the headers? also to free up flow and a little hp you can polish the 2 edges on the end of the tulip part of the exhaust valves
From factory there is already a pressure release system installed. Hince smog pump, e.g.r, pcv valve. Alot of times there is the vent cap on top of the valve cover that runs back into the intake or there is just a hose running from the valve cover with a pcv on the opposite side of the motor or both a vent cap and a pcv. Sbm has the cap with pcv. Unless your running high compression or forced induction the basic factory set up does just fine. Hope this helps 👍
@@charlesfields7908 the only part of what you said is that is the function of the pcv system.
@@charlesfields7908 the stock pcv is junk. nobody wants oil in the intake but you still need a vacuum of somesort to help the pistons rings. i would rather send it directly to the exhaust with the pulses
I love me a good Port + Polish its great for engines that don't have much of an after market or CNC profiles available, also note they didn't say get head skimmed (always worth checking even intakes/exhaust)
Skimmed??? You mean decked???
After your done spray WD 40 down the port and see if it comes out under the valve seat if it does that's not good
One of the best videos on P&P I've ever seen. 👏
Can you guys do my SUbaru?
I love this show. These guys know their S%&t!!!
Big block Chevy already have screwinstuds and guide plates
How much power dose it help
this is a very good channel !!!
Did that engine run with no airfilter?
Question, do you vent both sides of the motor to both headers or just the drivers side?
Both valve covers should definitely have a breather port but they both can be connected to one source just so it gets a constant vacuum and not positive pressure or you'll be blowing seals and causing problems. The exhaust is a better choice so it doesn't gunk up the intake and pistons and was actually very common back in the 70s and 80s. Just make sure the tube going into the exhaust is slash cut pointing towards the back of the vehicle and it is on a 45 degree angle. A piece of modified home gas line works fine. Also a steel check valve is a very good idea to put in just in case. Finally run your rubber hose to the two valve covers if you have a 6 or 8 cylinder or a multi-vented inline engine. The rubber hose SHOULD be radiator hose or rated for high temperatures as it is going to be close to the hot exhaust and hot engine. Hope that helps.
Anyone know who sells the safety glasses he’s wearing?
13:21 "heighth" is not a word
Is it true you put N20 on that baby?
can i use 305 cu.in. late 90ties van heads for polishing for use on a 1973 400 cu.in. small block ? what is the difference between the heads ???
I'd splash out on some aftermarket heads, Cast iron World Products are cheap enough and way better than anything from the factory for old school sbc.
G street machine Glasgow Montana 196 Int. 160 ext. 1978 B200
Believe me if you dont know what you're doing you can really mess up your heads or manifold, sometimes it's just better to let a pro grinder do your porting,
Nice video on modding heads for power!
I have Z1-R turbo Kawasaki bored sleeved to 1428 it has Mark2 welded crank,MTC forged pistons w purple rods, megacycle turbo cams, falicon slotted sprockets (underlapped 3 before and 3 after). The Head is custom cut Eddie Lawson 4 valve.. the "J" head is maxed out.. I only have a KZ 900 2 valve head as a spare. Can anybody weld valves lips to increase the diameter? they don't make the valves big enough diameter to fit. Stock Eddie LawsonGreen Machine valves won't fit my ports anymore so can only weld the valves lips and recut them down. It is shim under buckets so I can grind or lathe the slot on to fit
How come every time I watch one of these I feel like I would just end up with a bunch of scrap metal
It depends on your attention to detail and if you have some support by people who know more than you. I have a friend who is from a construction background decide in his 50's he wanted o build a GTO drag car and race it. Think he knew what he has doing? Hell no but he asked me to help him and advise him. Car is running quite nicely and he is having a blast. You know all those warnings that were even in this video about "don't do this or else bad shit happens"? Well any seasoned mechanic has a lot of them and thats because either we royally fucked up or witnessed someone else do so and never forget it. Benefit from that body of knowledge and thanks to the internet there are a lot of people out there in forums and such who are giving this knowledge away for nothing. Take advantage of it, and do your homework first but don't be afraid to try something new.
@@nickwarner8158 I was insulting their intelligence not mine lmao
Isn't there positive pressure in the exhaust manifold? How is it going to pull the gases really?
The gasses moving past that tube create a negative pressure in it, the vacuum then draws through the hose.
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