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How to port and polish a turbo exhaust housing

I'll fill this in later. The "book" I typed in this field before didn't save. Come back later if you want to read more about the theories behind porting and polishing.


 


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Porting an eBay 20g turbocharger
The price of this turbo will make it a popular purchase, so I figured I'd air out some tech about ways to improve it. This thing is not for everybody. I wouldn't feel comfortable bolting it on my car the way it comes out of the box. I could complain about its flaws except that so far absolutely none of them have been a deal-breaker for me. To me it's like an empty canvas. I promise to eat those words if it happens, and share my poop. Usually I can easily correct these flaws myself and so can you. BUT! If this thing turns out to perform well with what I do to it... It could easily be a cheap, quick ticket to an 11-second car. Something you could do with a free running 1g, a hacksaw, and about $500 worth of fuel upgrades. Yeah, that would be ridiculous, and I'm bolting it onto a well-modified car... But that being possible speaks volumes for what a DSM can really do. This is no big deal to me. I'd rather guinea pig my car for you in HD so you guys can decide whether or not you'd spend your money on this. Really it's an experiment because this isn't my daily-driver, and it contributes to building a better Colt. Tools I used involve: Scratch awl Milwaukee model ???? 1/4" straight-shaft electric DIY grinder Cone and ball-shaped double-cut burs 180 grit high-speed flap wheel Dremel with a flex-shaft and a tiny 320-grit flap wheel a zip tie 10mm combination wrench tiny flat-blade screwdriver (00) for the e-clip on the wastegate compressed air





Cylinder Head 204 - Porting & Polishing
This is a first-generation 1992 1.6L Hyundai Elantra small-combustion-chamber head. Thats what it is. It's a J1 Elantra cylinder head. Good luck finding another one like it. (read more)... In Cylinder Head 106 I talked about the mainstream porting theories as they are discussed. We looked at a cylinder head that I have thousands of dollars of professional work performed on, and a bone-stock second-generation head that I didn't port. In this video I just might do something you haven't seen done before. For some, that may be uncomfortable. The port and polish job I perform here is what I think will work best for my current build. This is not an extreme killer port job. What will be different here is where port textures are concerned, I will be following the advice of a reputable source that will remain un-named. You're free to port yours differently than I do in this video, and I give you that out, around the 20 minute marker. The Hyundai is far from being an ultimate-performance build. It's a $400 box of scraps with nothing but time invested. It's perfect for this video. My finished product WILL be an improvement over what I had. I don't yet have access to a flow bench. I still have an achievement to un-lock. As far as you should be concerned with the techniques I employ... without flow numbers there is no evidence of what this will do, but we will gather lots of info from dynp sessions and drag strip time slips. If I could test it on a flow bench, I would. There are MANY, and when I say many, I mean thousands of flame war mongering pirates floating around on rough seas with a hair trigger cannon finger itching to fire if you port a head any differently than what the herd mentality says to do while porting a cylinder head. I cover the herd mentality because it has merit. It's been tested. Tried and true. But I don't follow it to the letter of the law. I'm definitely not here to de-bunk it. I would port a cylinder head differently for each build based on how that engine was used. There's an extremely valid reason why relating to air speed. It's not the texture of a port that maximizes the effect of fuel atomization, but the velocity of the air running through an x or y sized valve. The driving factor in this is the piston speed. I'm not going to give you the technical information, but will refer you to information about the Lovell factor. There's a better description of this in the links below, and even a calculator to help you find your engine's sweet spot. Why the Lovell factor is important: https://www.highpowermedia.com/blog/3346/the-effect-of-valve-size Lovell gas factor calculator: http://www.rbracing-rsr.com/lovellgascalc.html Only people who have flow testing equipment know for sure what really works and have the capability to produce a perfectly-matched port job for the ultimate performance build. Those guys know the definition of ultimate, and THEY are floating below the water Aegis-class submarines ready to blow your comment up if you don't know what you're talking about. They don't care if you're an armchair mechanic or a herd of pirates. I will say, they're zoomed in pretty close on me right now, and I'm expecting to take a few hits. My work will be tested based on Dyno and drag strip performance, and the results will be posted here. Fortunately, those kinds of videos are a WHOLE LOT EASIER TO MAKE!!!





Polishing Aluminum (GSX is alive)
Tools: You need a big one that can run for long periods of time. Air tools are out of the question because the compressors that can keep up with air DIY grinders use the equivalence of 100 60-watt incandescent light bulbs while running. Mine uses that much power and it CAN'T keep up. I like straight-shaft electric tools because they use less power than air tools in order to do more work. They spin faster and generally have more torque. Electric drills don't have the RPMs needed to work efficiently because you need heat from friction for the polishing process. Cordless, fo'getaboutit. Bench grinders have plenty of speed, but don't make enough torque. Most bench polishing equipment is built primarily for production, not detail. If you have to polish large simple pieces, they're fine for that. The goal is to use a tool that is efficient enough on what you're polishing to make this seem less like punishment. Quality tools. Dremels are only good for grinding and sanding tiny detail stuff, but larger industrial DIY grinders with a .25" chuck are what you need. Power tools are only acceptable for polishing. Power sanding equipment doesn't have a random orbit and also doesn't leave a grain to allow you to gauge how deep to go, so you can't achieve a polishable surface by mechanical means. You'll also notice that sandpaper for orbital and belt stuff doesn't go beyond 320 grit and it's expensive. With a power tool you will inevitably leave marks too deep to remove by wet sanding with 220 grit. You will pay for cheating. Removing casting marks or rough cast with a flap wheel is not cheating so long as you remove all of the defects evenly and still thoroughly hand-sand the part afterwards. About Sandpaper: Anything goes below 220 grit so long as it's dry. You have to wet-sand everything higher than 220 grit, so both electric power tools and non-wet-sanding paper are ruled out beyond that point. The best finishes are hand-sanded in the crosshatch method shown in this video. If there are stubborn scratches that your sandpaper won't take out, go to a coarser grit and work your way back. Step up only one increment in grit with every grade of sandpaper available until there are no visible scratches in the surface. Skipping a grit will just mean you have to work 4x as hard to do the same work. So 220, 320, 400, 600, 800, 1000, etc... Depending on what grade of aluminum you're working with, you can sometimes get away with sanding the part only to 600 grit. To get the most out of a shine, you have to go beyond 1000 grit. The farther you go with the sandpaper, the less work it will take to polish and maintain. About Rouge: The black rouge, or emery compound, has an abrasive in it. It's also considered a cutting compound. It removes material and makes easy work of oxidation. Because it has an abrasive it can leave directional swirls in the finish that are visible in some lighting conditions. It's an extremely-coarse polish but in many cases can produce a brilliant shine. Brown rouge is a step between black and white. Though unnecessary if you're using black, brown is less aggressive while still having the ability to remove scratches and defects. You can also polish wood with it. White rouge is ideal for precious metals PLUS aluminum. It removes what a jeweler calls a deep scratch, but what an auto enthusiast may consider invisible. If there's a scratch that the black rouge didn't take out, white rouge won't do it. It will however, bring out the most reflective finish in aluminum that you can achieve mechanically. Jeweler's rouge (red) is not for aluminum. Neither is blue or green. Well... blue is universal supposedly. I haven't ever needed it and don't trust it. About polishing wheels: Polishing wheels come in different textures. For black rouge I use hard or triple-stitched flannel wheels. The more stitching, the harder it is. The soft wheels tend to disintegrate quickly. The harder wheels can contribute to swirl-effects in the finish when they become contaminated. Metal polish: I can't say enough good stuff about cheap-old Blue Magic metal polish. Brightens the best white rouge polish jobs and is really easy to work with. Mothers is good. NEV-R-DULL is an amazing product that lifts and cleans almost anything out of metal. Where to get supplies: You can buy rouge by the pound at truck stops. Lots of great polishing supplies can usually be found anywhere where you'll find the rigs. Ask a trucker. Also there's HarborFreight, Eastwood, PJ Tool & Supply, and lots of others. Everything's within google distance.





CRANKWALKED? 7-bolt teardown 1080HD
Now this is a story all about how My bearings got flipped-turned upside down And I'd like to take a minute just sit right there And tell you how I used to mix and burn my gas and my air. In RVA suburbs born and raised On the dragstrip is where I spent most of my days Chillin out, maxin, relaxing all cool, 'n all shooting some BS outside with my tools When a couple of guys who were up to no good Started running races in my neighborhood I heard one little knock and my rods got scared And said "You put it in the garage until you figure out where..." I Begged and pleaded that it not be that way, But it didn't want to start and run another day. I kissed it goodbye, because the motor punched its ticket I got out my camera, said "I might as well kick it." Crankwalk yo this is bad Drinking metal shavings from an oil pan. Is this what the rumor of crankwalk is like? Hmm this won't be alright But wait I heard knocking, grinding and all that Is this the type of failure that should happen to this cool cat? I don't think so, I'll see when I get there I hope they're prepared for this video I share. Well I pulled all the bolts and when I came out There were chunks in my fluids in the pan and they drained out I aint all depressed cause I seen this before. I got my books and my wrench and we'll do it once more. I sprang into action like lightning disassembled I whistled while I worked and my hands never trembled If anything you could say that this bling is rare, and when I saw what broke I stained my underwear. I turned off the air compressor 'bout 7 or 8 And I yelled to crankcase "Yo holmes, smell ya later" I looked at my internals they were finally there To sit on my workbench and stink up the air. Audio track by RojoDelChocolate. Here's the 48,000 mile-old 7-bolt I blew up summer 2011 after over 150 drag passes, a half dozen Dyno sessions, 4 transmissions, 3 clutches and 10 years of hard all-weather use.





4g63 Balance Shaft Elimination - bearing modification
This is the first part of a two part series about balance shaft elimination on 4g series engines. This video details the bearings, the other video will cover the front case modifications. I've already got a low-def video of the front case mods, and I plan to re-shoot that one in HD when I'm in the assembly phase. It's linked in the video. The balance shafts are designed to cancel out harmonic vibrations caused by combustion and the spinning rotating assembly. They may offer a greater degree of comfort to the driver and passengers, but with that comfort comes a price. Often, when a 4g63 timing belt gives up, it's because the balance shaft belt breaks or comes loose and takes the timing belt out with it. When that happens, it can total your pistons, valves, damage the crankshaft, wrist pins, timing belt tensioner and crank angle sensor. Basically, it can total your motor. The balance shafts also have a combined weigh over 10 lbs and both are driven off the timing belt making them additional and heavy rotating mass. If you've got a lightweight flywheel but still have balance shafts, you have your priorities mixed up. So here's what you do with the bearings. It's easy. You can do this at home. You CAN do it with the motor in the car, BUT DON'T. You must enjoy punishment to do this like that. The end result will slightly increase your oil pressure, but usually not enough to cause concern unless you have a full-circumference bearing turbo, ball bearing turbo--with your oil feed coming off the oil filter housing. The head feed would be better in that case because it's regulated at 15 PSI.





Hyundai 4g63 Assembly Part 1
HOLD ON TIGHT! HERE WE GO! We begin the blueprint and assembly on my 1992 Hyundai Elantra's bastardized 4g63. The parts used in this are from a mash of different brands and models outside of the typical 2.0L 4g63, but the specs and standards I am following for its assembly are for the 2.0L DOHC. If you want to follow along in your service manual to verify what I've done here in this video, the processes we cover here detail pages 11C-95 through 11C-105 of the 1g Overhaul manual. I would prefer you not rip them from the binding and throw them away, relying only on this video for instruction... but rather use this video as a motivational guide, and as a demonstration of the techniques involved in those sections. You gotta do the cooking by the book. I never had any intention of making instructional videos on this particular car, but after it blew up I slowly realized it's actually a better case study for how a 4g63 ticks than anything else in my driveway. There are several reasons for this. One being that it's a mix of parts that shouldn't be bolted together, and the other is that many of you watching my videos aren't trying to build a 600hp engine out of aftermarket parts. You're trying to put back together what used to be your daily driver. This car covers those bases. Don't think for a second I won't go through this same trouble and level of detail for the GSX. I will. When I do, having this information in this video will give you a better understanding on how and why I do things the way I do when I get there. This was the shortest I could condense this video. I've never uploaded a video this long, and I hope I never have to do it again. It took a month to create on cutting-edge equipment, 16 hours to export, and 9 hours for YouTube to process. My script for the voiceover is 6 times longer than the whole script for the movie Pootie Tang. 6 times. Longer. Than a Hollywood movie.





Making the intake Manifold
Just a quick slideshow Video showing how I fabricated the intake plenum for my project....





Performance Chips - Mythbusted
Can you really get an increase of 35 horsepower using a $20 'Performance Chip' from eBay on your car? And how do they work? In this episode of Mighty Car Mods, Marty and Moog find out, with some surprising results... https://www.facebook.com/mightycarmods Stickers, music, magazines and MCM gear: http://www.mightycarmods.com/collections/ Discuss this episode here: http://forums.mightycarmods.com/forum/general-mighty-car-mods-discussion/ge neral-discussion/956779-performance-chips-mythbusted-episode-discussion Also something to note around Mighty Car Mods: we are normal guys and are not trained mechanics. We like to make interesting car mods and show you how we've gone about it, but we can't promise that anything we show you will work for your particular car, or that you won't harm yourself, someone else, your car or your warranty doing it. Please be safe, be responsible and unless you know what you're doing, do not fool around with very serious machinery just because you've seen us make it look so easy. Talk to a qualified mechanic if you are in any doubt.





Hyundai Assembly 4 - Balancing Rods
I edited this video to its finished state, and RojoDelChocolate handed me a track with no collaboration that was the right length and rhythm. I literally did nothing to the video once the audio track was dropped in, and that's just how it went. I can't believe it. It's like when you're pumping gas into a Ford F150 full-blast and release the pump handle to stop right on $80.00 even. He's got more musical talent in his pinky fingernail than I have mechanical ability in my spleen, appendix and tonsils combined. Thank you RojoDelChocolate. Here I'm cleaning up the fly cuts, balancing the piston and rod assemblies and preparing to double-check my valve clearance. I had to start by cleaning up and re-lubricating every part that was removed to prevent contamination of the assembly. This is the tedious part of doing the job right. We learned that this whole engine assembly was pretty far-gone in previous videos, way past its service limits, so making it fit and work again takes extensive testing, machining, and re-testing to ensure all of the parts fit. This is likely the most challenging build I will perform on any car in my driveway. It has been so far. But because I have not demonstrated the basics of engine balancing beyond what a machine shop has to do to zero balance a flat-plane crankshaft, I thought I'd give it its own video right here with one of the test assemblies. When you balance rods by themselves, you balance the big-end and the pin-bore separately. You get weights of both ends of the rod using a jig and a process that I don't demonstrate in this video. The reason you do this is because the position of the weight behaves differently relative to its distance from the crankshaft pin. Weight on the big end has a greater effect than if there's extra weight on the pin bore, but they both matter as do their combined weights. The best balanced engines have every part of the piston and rod assemblies balanced separately within .1 grams using the method I just described, and not the method shown in this video. The method shown here involves weighing ALL of the piston and rod assembly components together, and then taking out the difference just on the casting lines of the connecting rod. They were already off-balance and had never been balanced before. This is an improvement, not perfection. It's still something this engine needed to have done. I'm not using the big-end/small-end method here because these pistons are pressed-on and if I try to remove them from the rod, it will shatter the piston skirts. No thank you. I'm not replacing these pistons. The reason I grind down the casting lines is because it's weight is in a neutral territory, extending from the big end to the small end. It's easier to take an even amount off when you grind across the entire length of the rods. This method leaves a lot up to assumption as there's no way to determine which end of the rod is heavier, or if the weight is in a wrist pin or piston. All this does is ensure the crankshaft is spinning an even amount of weight on all 4 of its rod journals. Grams of weight turn into pounds of force at idle speeds. My goal is to remove that vibration at any and all rotations per minute if I can. So I make them all the same within 1.0 grams of their combined weight. If you're assembling and balancing all NEW parts, not parts that have worn together and need to go back in the same holes... you will have to balance the individual parts and pieces. This is the poor man's method. Even with the new parts you still do the poor man's method once you're done balancing the individual parts and assemble them, but sometimes when you're lucky with the new parts, you can just swap around the rods, pins and fasteners to balance the weights on each assembly and not have to grind anything at all. That's awfully nice when that happens. You know the Hyundai won't let me get away with that. Removing stress risers might help strengthen the rods, but it's not what I'm after here or else I would have removed the whole casting line from all of them. These rods should be fine for my goals. My goal is to remove just enough from all of the fatter rods (weight wise) to match the lightest one. Balancing an inline 4 engine with a flat-plane crank is easy if you have already balanced the crankshaft. This crank was already balanced for the GSX motor on a previous occasion. It's zero'd out. In order to balance the rotating assembly, all you do is make the piston and rod assemblies weigh identically to its neighbors. Just 3 grams of weight can produce over a hundred pounds of lateral forces at red-line so this is an aspect of engine building that you should not overlook. All you need to do is get all of them within 1 gram. The scale I'm using measures whole grams, so that's all I can do anyway. This method is acceptable for balancing a rotating assembly as long as you're smart about how to remove the weight.





Calculate Your Compression Ratio
This is everything you need to do to calculate your compression ratio. No foolin'. Every equation and process demonstrated. Find all your variables. Know your exact compression ratio in every cylinder. This is how you do it. Just because your service manual says your car is 7.8:1 or 8.5:1 compression doesn't mean that it is. Whenever there are casting irregularities, variations in piston height, parts that have been machined, non-OE parts, or changes to your head gasket selection, your compression ratio WILL change. It's highly probable that you're only CLOSE to spec if you've never touched your engine at all since it was "born", and that it doesn't MATCH spec. Even if it did, how would you know? This. 5 variables. V1 Swept Volume V2 Deck Volume V3 Piston-to-deck clearance V4 Piston dish cc's V5 Head combustion chamber cc's The ratio math: V1+V2+V3+V4+V5 = volume of combustion chamber at BDC V2+V3+V4+V5 = volume of combustion chamber at TDC The ratio is... (V1+V2+V3+V4+V5) ÷ (V2+V3+V4+V5) : (V2+V3+V4+V5) ÷ (V2+V3+V4+V5) or BDC ÷ TDC : TDC ÷ TDC First you fill in the variables, then you calculate volumes, then you add the volumes, then you reduce the ratio (fraction). It's that easy. Here are your magic numbers: 0.7854 = Pi quartered to the ten thousandth 16.387 = number of cc's in a cubic inch. If you divide any number in cc's by 16.387 it gives you inches. If you multiply any number in cubic inches by 16.387 it gives you cc's. Quartering pi lets you use the calculation: BORE x BORE x STROKE x .7854 = volume of a cylinder instead of... π x (BORE ÷ 2) x (BORE ÷ 2) x STROKE = volume of a cylinder Either way is right. You get the same result if you calculate pi to the ten thousandth. While I apologize for all the math, no I don't. I'm really not sorry. You actually clicked here for it whether you realize it or not. This is ALL the math, the tests, and the whole process to calculate your cylinder volumes and compression individually even if you don't know any of your variables yet. All of my numbers are present for those who want to calculate out the last 3 cylinders out of curiosity just to see how it affects cylinder volumes and compression ratios from one cylinder to the next. Why would I do that for you? Why would I deprive you of that practice? Just assume that all 4 of my combustion chambers are 41.75 ml if you do this. Clicking like share and subscribe helps a channel grow. It also motivates me. Don't sweat the camera. It's enough to know that so many of you care about what I'm doing here. From the bottom of my atmospheric dump, I thank you all! This gift horse's teeth are all over the place, but he sometimes poops gold nuggets. PS: Use ATF for your piston dish volume tests, not alcohol. Of course it's better just to use the spec sheet included with your pistons... but not everyone gets that luxury. Water is just fine for head combustion chamber tests. Dry and re-oil all parts that water touches.





Boost Leak Testing 202: Hair Spray 1080HD
Why do I know about this? I'm tired of being the one knowing all the weird crap. If everyone knows it, it won't be weird anymore. It will be commonplace. By the time I'm done sealing up all of my own Boost leaks, all of you will also be experts as well. I'm sure most of you would teach me something, too... but you subscribed, so here it comes... something I learned in my travels... Also, thanks Ilya M. I've only heard about it twice in my life. It worked great for the one time I've ever needed it, and I'm a huge fan.





Ball bearing turbos rule
Start up and idles





Installing a T-28 turbo on a 98 Eclipse GSX
This is an easy install. Everything is in the same location as on the factory turbo, and bolts right on. Those of you who have never installed or haven't upgraded a turbo yet might find this video more useful than those who have. Torque specs from the factory service manual are listed for what's most important. It's imperative that new turbo bolts are used with new FACTORY turbo washers. They're a specially designed spring washer, and are single-use. Use of other kinds of washers may cause bolts to break or vibrate loose. This turbo was on the car prior to this installation, but it received a port job to match the burly EVO III manifold. We installed a head-feed turbo oil feed line rather than use the factory hard lines connected to the oil filter housing. Some argue that the oil pressure from the filter housing can be harmful to the life of the turbo, but IMO, that only applies to turbos with full circumference bearing center sections. Either way, the Stainless Steel line is cool. I'll post the part number for the plug needed to block off the old line location.





2g GSX How-To: Attempting turbo swap with WTF ending
Okay. Now I've seen it all. There's an old adage that states "if you want something done right, you have to do it yourself". Well, this video both confirms and debunks that theory. A lot of that depends on each person's definition of "done right". You can't do things by-the-book with aftermarket hardware. Sheldon bought this car with a pretty full mod list and it ran great at the time, but by the time we got it to the track, we couldn't beat a 16-second pass. Despite the laundry list of troubleshooting we both attempted to do through tuning and testing, we couldn't determine why it was around 4 seconds slower than it should be running. I started having doubts that a "ported T-28" was what was on the car, and there's no easy way to tell them apart without removing it so we opted to install a 14b... since plenty of people easily run 13's with them. Stick around for the plot twist.





How to Rebuild a Turbo - Part 1 of 2
Rebuilding a td05h 16g turbo. This process can be applied to many journal bearing turbochargers. :) It definitely comes in handy to know how to do this when you are in this type of hobby. 4/25/12: Small explanation on the balancing of the rotating assembly since I get so many comments regarding it. This particular turbocharger, td05h, has its rotating assembly components balanced separately. This means each individual part (compressor wheel, turbine wheel/shaft) gets balanced separately. This allows for easy interchangeability of parts in case they need replacing. This is why I am able to install a td05 20g wheel on this turbo without having to balance the entire rotating assembly. THIS IS NOT THE CASE FOR ALL turboS OUT THERE. You need to research whether your specific turbo (if it's not td05h) was balanced as an assembly or "component balanced" like I explained above. I hope this information helps. Good luck in your projects. Stay Boostin' keywords: turbocharger dsm eclipse talon awd gsx tsi fwd gst mitsubishi evo evolution lancer 14b 20g td06 td06h td05 install installation upgrade race vs Boost supra wrx sti toyota subaru Dyno laser rs rst 13g hx35 hx40 holset 18g 25g sbr t25 stock replace rebuilding big large nissan 240sx t28





Which car is faster? Which Car is Faster?




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