I Supercharged My Subaru Legacy

Supercharged Legacy go WHEEEEEEEEEEEEEE
Build info: wiki.blackthumb.tv/wiki/Legac...
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Website: blackthumb.tv/

[@BlackthumbTV]

I'm truly humbled to see everyone's support for this build! I've just recently released all the CAD files I used to create the intake manifold for free on my site, linked below. Be sure to grab a shirt on merch.blackthumb.tv/ if you'd like to support my efforts! wiki.blackthumb.tv/wiki/Legacy/Supercharger.md

[@RandomlnternetGuy]

Legend

[@RandomlnternetGuy]

Imma pick up a "This blows" shirt FOR SURE

[@cadenfabbricino7039]

in the future use sheet steel its very easy to weld and to bend and to work with

[@spankthemonkey3437]

This is austrailan😃

[@matty4z]

subaru? no no subarcharge? AwYeah!

[@RandomlnternetGuy]

Your builds ground me as an idealistic car enthusiast. Like usual, thank you for taking the time to show us

[@BlackthumbTV]

Thank you for your kind words, I hope to continue to live up to these standards

[@Blue__244]

@@BlackthumbTV you could fit two superchargers on that intake manifold

[@Carstuff111]

So, supercharged flat 6 in a Legacy? HELL YES! Sounds freaking amazing and the fact that it is that quick without an after cooler is awesome and means you really do not need any extra boost on the current setup.

[@TheStruggleFest]

just run water injection and let her eat.

[@kw2519]

@@TheStruggleFestmeth water is fun. Unless your car gets struck with lightening the pump shorts out, pumping 7gal of meth and water into your engine overnight…

[@kw2519]

@willham1427 hahaha

[@xostler]

That intake box design is perfect for integrating a cooler later too!

[@The2OfAwesomeGamers]

@@kw2519 Mate, that sounds like personal experience haha

[@megamiteexplosion]

As a big 3800 guy, I know and love that sound very very much! Sick build.

[@ghomerhust]

those park avenue ultras!!

[@Oatinator]

Its never even crossed my mind what a boxer would sound like with a supercharger before, but now im in love and i want one lol

[@JohnClarkGaming]

It sounds amazing

[@IvanOoze1990]

all you can hear is the supercharger.

[@ilovehappyemos]

The later M90 superchargers off the 04-07 GTP came with a drive-by-wire throttle body. Not sure the throttle flange would match that Gen 3 blower, but the 04-07 blower (gen 5 m90) are more efficient. Also, there is a tool out there to machine the snout down to run a smaller pulley, and all you need is a drill. As someone who has messed with a lot of GTPs, that blower sounds like its spinning about the stock speed for a 3800, so you can definitely go down a couple sizes on the pulley. The 3.6 is going to be way more efficient at moving air through than the 3800 could ever dream of being lol. Awesome build! Thanks for the inspiration.

[@BlackthumbTV]

Thanks for the info! I had also considered driving the blower off a custom pulley on the alternator to fix the issue, but I'm trying to contain myself as I don't think this engine can handle much more (given what I've seen from the turbo guys). The drill-tool sounds quite interesting though, I'll have to keep that in mind just in case.

[@al73r]

5speed gonna break before the motor would be my bet in this situation 😄

[@mtex4]

This guys not lying smaller pulleys on these are crazy!

[@twizz420]

@@BlackthumbTV I was in the 3800 groups for a long while many years ago and that guy's not lying. The pulley was one of the main upgrades for the m90 supercharger. They can make way more power with just a pulley.

[@itdoesntmatterwhatyourname6128]

Awesome video, I think this may be the very 1st supercharged Subaru engine that I've seen.

[@TexasGTO]

Port the blower. You'll gain about 1-2 pounds of boost. You can do it at home. Would be a cool video. Thanks!

[@brodyfinlayson1321]

This is epic. mad love for the ez30. some solid engine and transmission mounts would definitely increase the driving experience. After installing Kien mounts in my 04 6 spd ez30 legacy, the throttle response was so much crisper and the engine noise inside the car increased massively. highly recommended for maximum auditory enjoyment.

[@taylorhickman84]

yeah that motor movement looked a bit extreme. how does the 3.6 compare in terms of reliability to the 4cyl?

[@brodyfinlayson1321]

@taylorhickman84 3.0 ez30 is a lot more reliable at similar power levels (240hp) than the ej. But not so much when boosted. The 3.6 is weaker than the 3.0

[@winzracingNZ]

He does need better engine and box mounts according to the hood camera 😁🍄

[@titaniumoverdrive259]

People actually do stuff to the EZ30? I’m surprised? At that point get a boxster H6

[@RandySpycyWeinr]

As a Subaru guy and love your content. This is the kind of car shenanigans. My 1st swap was a JDM EJ207 in to a US Sti. Doesnt sound special but back in 2009 it was rare because of the US spec STi was a completely different ECU, sensors and wiring. I had to solve all these things myself, no guides, no kits. Nothing against the bolt-on guys, I just need more of a challenge. Im blessed with the ability and knowledge to completely assemble, install, manufacture small things, wire and tune. This channel is gold to me. Thank you Blackthumb.

[@titaniumoverdrive259]

I’d love to learn that shit For the sake of the hobby

[@brage4284]

Would be interesting to see some accelerating numbers before and after 😄

[@beeawesome7140]

slow before, slow after, lol.

[@27Zangle]

@@beeawesome7140 Did you mean, slow before and not as slow after? :-)

[@david929190]

I'm impressed with $1300 going that fast.

[@adeadlyfart13]

Looks like that engine could benefit from some motor mounts, other than that this an awesome build. I appreciate the enthusiasm!

[@rushthezeppelin]

Exactly what I was going to say. Maybe some poly or even aluminum mounts would be wise with how much that engine is bucking around now.

[@tbas8741]

Looks like the Bell housing Pitch Stop Mount Bushes are gone also the factory Pitch Stop arm is pretty compliant. It ties the block directly to firewall to prevent engine rocking back.

[@CrackerSmith]

He could also use stabilizing struts if he doesn't want to go to stiffer mounts.

[@fuzzjunky]

0:42 and maybe polish the headlights lol. car looks 20 years older then it should

[@lsswappedcessna]

@@fuzzjunky honestly for all the work you do polishing lights, you may as well get some new housings.

[@just2damcoo]

I'm so glad I stumbled across this video. I absolutely love oddball, homemade, DIY builds like this. I bet that thing is a lot of fun.

[@fun6243]

I like it. You need to max out the stiffness on your mounts and soften up your suspension. You working with a split block so you need to watch an sti buck under boost. Try and hit that mark. It's something you can fabricate for a cheep awesome and effective solution. Have a blast.

[@xbox230]

You’re content is so entertaining dude, you do such a good job showing your process. I’ve been wanting a classic jdm car that I can mess around w and learn how to do all this stuff. I wanna do all of this you’re doing but I’m on such a small budget and very little knowledge so you help a lot

[@crazyfingers_kc]

my dads got a 2001 Silverado 1500 with a 4.3 v6. He got it with around 20k miles, and today its sitting around 335k miles. Hes retiring this year, and ive always wanted to take one of these old 3800 superchargers and throw it on an old TBI 4.3. This video greatly inspires me to get his old ass out in the garage and try it!

[@kendrickwilliams3696]

There is alot of space to fill with boost. It would have taken longer but separating the big pancake manifold into individual runners would have helped power and response drastically.

[@BlackthumbTV]

It doesn't make as big of a difference as you'd think. I tuned a Miata with an intercooled supercharger kit, where the intercooler was after the supercharger/throttle body, meaning it would see both boost and vacuum. It did make a difference in both time to build boost and time to build vacuum, but nowhere near as much as I had anticipated. This setup builds boost as fast as you can open the throttle effectively, and change to Decel/vacuum delay isn't noticeable vs the stock manifold.

[@lamboferruccio]

KZbin algorithm is a funny thing, I’ve been researching 3800 swaps and this video popped up, much to my surprise it’s fantastic, thanks for all the info brother and enjoyed this style of video. I’ll be watching more of your stuff from now on. PS: that H6 sounds fantastic with that blower 🤔

[@Tiberiumfreek]

The fun part about just slapping it together with improvisation, is the chance to make it even better! Slowly work better and more proper parts into the project and really fine tune the performance. This is really cool! I love to see how people can just find a junkyard super charger and slap it onto an engine, never designed or intended for one.

[@swealer]

Hey man! Just found you in my recommandations and i love it!😅 That is what car tuning culture is all about and not another guy who rebuilds a supercar (nothing wrong with that but to much here allready). Knowledge, Skill and knowing what you talk about, i am impressed! Keep it coming bud! Greets from germany❤

[@thatplantdude7492]

1st time seeing your content mate, and I have recently found a new love for Subaru's after pulling one apart....I work in a wrecking yard. They are so user friendly so I knew your video should be good. And it was awesome! You are definately a car guy! Not too sure about the LS swapped 8 you mentioned though, I had one of them and loved it for what it was. Looking forward to catching up on your content here in Sydney, Australia. ✊🏻

[@oragelfitness1235]

This is honestly just so awesome. Love your channel and videos. The enthusiasm you have has to be the best part though.

[@thedanyesful]

Great build. I love the creative design of the intake and your detailed description of the issues you faced.

[@EVP22]

That was such the best car video I've seen all year! I loved everything right from the get go: your confidence, comical anecdotes, your editing skills, your knowledge, that you were happy to share what you did, and you delivered your speech in a clear and concise way that was very easy and enjoyable to understand. Subbed. Greetings from Australia 🦘

[@hazimreitz]

This is an awesome build!! Engineering your own parts is pretty dang cool and the car sounds AWESOME!!

[@AgencyIsland]

Would love to see a scoop fitted over the super charger, to both cover and funnel air to cool everything , would be pretty neat Sick build! Love to see people modifying cars that people usually dont , makes you a pioneer 😊

[@DMSparky]

The best parts of a supercharger are the increased power, whine, and it leaves the exhaust unobstructed for the glorious H6 sound. That is a hilarious, awesome and unique build; nice job man!

[@SarntRexxo]

Really wish there was someone like you that had a video up on supercharging the 2.8L 24V VR6 with a twin screw. Super in depth and also concise. With good explanation and plenty of video showing how. Lovely. Deffo subbed.

[@060racing8]

It's always good to watch cool videos about about cool cars when you're working on your own

[@CrackerSmith]

Adding extra dampening to the engine using stabilizing struts should help minimize the lurch during shifting. I think this will help it be even faster.

[@paulboissiere1278]

First time seeing your content. You’re awesome!!! Such a great video. I LOVE the shadetree, yet techsaavy way you went about the build. 👍🏻

[@XingaBoy098]

“You also just scan a ruler” holy shit I’m in tears this is amazing, that’s exactly where i got sold on your channel. Eager to see what comes next!

[@boostedproblems5139]

Thing sounds Awesome! Glad to see that smaller pulley did the trick ! That boost level should be good for 50% more power than stock, minus 40ish hp for the belt load. Looks like a blast to drive. Congratulations on making dirt cheap daily look bad haha

[@BlackthumbTV]

Yep, she rips now! Would be fun to see it at 14psi four that double-ish HP feeling, but I gotta keep myself under control.

[@boostedproblems5139]

I think you would need a gen5 m90 for that, the gen2 on my 2.5l makes 14psi but man does it eat belts !

[@christopherjohnston6343]

I like how poorly this comment aged. I guessed like 230whp based on your comment. Then it goes and nearly doubled that

[@13Monkeys]

Wow, what a great video! First off, i love the unusual project. I also love how explain clearly how you actually accomplished it, and you're right, you are hilarious! I'll have to check out some more of your content. One quick question, what kind of tuning did you have to do to get it to run with that boost, if any?

[@BlackthumbTV]

Any vehicle will need a tune when you modify it, especially when adding forced induction. Check out my video on ECU tuning for more info on why. All my setups run standalone ECUs for what it's worth, I don't typically run factory engine management.

[@tnjboyd20]

Dude I am only 5min in and I have to comment on how much I'm diggin your wit. I dont usually watch videos like this all the way through but your easy to listen to and entertaining. Cheers sir and keep up the work! You've made this actually mad complicated thing seem obtainable to regular people like myself!

[@SKYLAR7499]

I hope the best for this channel, in depth and entertaining all at the same time ❤️

[@philipkealoha2573]

Sounds sick . Love the low growl and it looks torquey for a boxer.🤙🏽💪🏽🔥

[@tbas8741]

Boxers are by Design more "torquey" than an = Inline 4 Cylinder. (no balancing shaft, no counterweights, not having to fight gravity) And Turbo/Boosted Boxers even more so, Also able to put that power down due to AWD.

[@AlienationNation]

Dude this thing is SICK, I love what you've done to it. My buddy's mom drove one of these legacies (stock) for about 18 years before it died and its really something seeing what it could have been. You got any more plans for the Gc8? I own a stock 97 wrx so I'm a sucker for Gc8 content and have to ask.

[@BlackthumbTV]

I may have some stuff going on with the GC8 this winter, but we'll see. I project-hop a lot heh

[@AlienationNation]

@@BlackthumbTV I look forward to watching! You should throw a lift on it lol

[@Technicallydave_]

Both a super awesome, practical build & a wonderfully informational and edited video!

[@rediceatx]

This popped up in my feed today, so glad it did! Awesome build man!

[@The_Makers_Prerogative]

Turbo lag makes me pull my hair out when driving a WRX. Thanks for making this video, I've been wondering what a supercharged (Roots/Screw) Subaru might look like, you did a great job. I wonder if an LS swapped awd Subaru is possible

[@BlackthumbTV]

LS swapping is possible, but with the subaru trans it'd hang way out the front of the grille. I remember seeing one a bit ago, it didn't even have much of a front end left. Just engine

[@The_Makers_Prerogative]

@@BlackthumbTV Slap a roots supercharger on it and call it a Suba-rhino

[@rickcupola6262]

The Ferrari V8 Subaru rally car is an example. The engine sticks out of the front axle like an Audi, to a lesser extent. A front mounted heat exchanger in this setup will be tricky, because the engine will be colliding with it, which is physically illegal.

[@RRR_Motorsports]

What wrx has turbo lag? Should try driving a big single turbo 1jz 😅

[@thebigcum6297]

@@RRR_Motorsports I’d wonder the same thing unless it has a stock STI turbo as mine does and it lags but once it kicks in it’s way more fun for a cheap upgrade.

[@cameronsenna8979]

Love the sound of it! Nice build!

[@jgizzy]

I can't wait to see what's next as this channel explodes. One thing: don't change the spirit of your videos as you get big! I love how you do everything: garage fab style with some new-tech productions like 3D printing, weird engine swaps and odd/novel build ideas using randomly chosen junkyard bits, and your humor/personality. Great job, I'm along for this ride onwards and upwards - subscribed!

[@BlackthumbTV]

Not sure how big this will ever get, I'm honestly surprised that this video got the attention it did. Didn't know so many people liked supercharged Subarus. I'll be interested to see where things go from here. I only plan to keep doing things like this, and if I had more resources from this channel I'd probably keep doing the same thing, just with more parallel projects. Time will tell 🙂

[@trapt29]

Amazing build and video bud!

[@ovalshrimp]

Totally rad. Really enjoy watching your process and outstanding commentary.

[@ChummiaChan]

I love the way you explain everything, top notch show material. You've earned a sub! :D

[@nickflynn2567]

My man! This just popped up at the perfect time. I am just now starting my ez30 swap on my 2 door gc. The plan is to supercharge it with an s4 blower. You are a huge inspiration!

[@69BigLou]

Wow dude! Top tier content. You are an inspiration to all the Garage Mechanics/ Fabricators out there!

[@lula221h]

I've been searching for this type of thing for ages! Thanks KZbin recommended! I'd honestly likely buy this as a kit if you improved it and sold it, keep up the good work, subscribed! 🔥

[@BlackthumbTV]

I remember years ago I was searching to see if someone had supercharged a Subaru but there just wasn't anything. After some time I finally had the skills necessary to do it myself! Also, the design files are available on my site for free. You're welcome to use them to fab one!

[@Nickpva]

Awesome project, tons of info, gotta subscribe. Cheers!

[@Mike_44]

Man, such awesome work and creativity. Congratulations! I really enjoy the content of your videos. Keep up the great work!

[@fredastaire6156]

Man!! I love that inspirational dreamers like yourself exist. As a DIY Subi enthusiast with some questionable welding skills myself, I am always deterred by the naysayers; family, mechanic shops, Facebook Groups...lol! Honestly, I know I'm not the only one that feels that they can create some really awesome stuff through their imagination but is quickly squashed by naysayers. From the bottom of my heart, I thank you for not listening to the naysayers and truly built what you can believe in your head. Simply put I am blown away by your imagination brought to reality. You truly have made be believe that I can create what my mind thinks up...within reason, of course!! Cheers!! 🤩

[@BlackthumbTV]

Don't worry about the naysayers. It's your car, do what you want as long as you're safe about it

[@dozer757coastalva2]

Very cool build! Love the h6. I'm glad I found your vid.

[@sayerhaas2841]

I love the way you break it down. You would be an incredible teacher. I enjoyed the video and the build thoroughly. Thank you.

[@nelsnielsen2701]

Just found this channel love the builds! How have you not blown up yet!?!?!

[@mickdabz]

i love theway this thing lifts the suspension when u get into it ...awsome build def erans you a new subscriber!

[@bgauthier1983]

What a great video! Fun idea, great explanations and overall fun to watch! 👍

[@FuZzyy14]

Just discovered your channel through this video, it's awesome dude! Keep it up, you'll get followers in no time

[@shellz150]

i love what you did here!!! awesome job brother

[@aaronfrancois3996]

I'm a b pressure alloy tig welder and a cab structural welder and I also work on the heaviest mining equipment in the world. Oh yeah also a mechanic, all trained and applied with experience. YOUR WELDS LOOK FINE!!! I am inspired by you and we all appreciate the videos.

[@devsusps]

My new favourite small channel car guy. I am so glad the algorithm brought me here. Im here to watch you grow man! Keep it up 🙏

[@SmithTrek]

Oh the best !!!! You scan a ruler !!! That's thinking smart !! Love it !! Looks amazing !

[@ctransport5277]

My new favorite channel. This is good stuff bro!

[@thejoshuahenry]

Seeing this build come together made my day!

[@benkinney8870]

This video is outrageously funny! I've never seen your channel before, but I look forward to seeing more of you in the future; you've earned a subscriber. Great job and keep up the stellar production!

[@BlackthumbTV]

Welcome aboard!

[@justinpakarno4346]

Great video showing all the steps and what it took!

[@papamauryc2300]

This is growing to be my favorite car channel on youtube. Just a humble guy making insane things. You just gotta love it❤

[@grandtheftauto1233]

First video I saw from the channel. Well done. I wonder if more performance could be had with a modified tube runner intake like the stock one. Awesome job looks like a hoot!

[@josh4901]

This channel just needs exposure!!! Top notch please keep it up!!! Also maybe replace those motor mounts? Engine looked like it was moving

[@notme8121]

That was very well done, I like it! You forgot to mention that it couldn't have happened without the super cool high-tech AC aluminum TIG welder! I have a couple of those superchargers laying around but I never did anything with them yet because I don't have the super Hi-Tech AC aluminum TIG welder

[@BlackthumbTV]

There's a number of key tools that got me through this. The standalone ECU, the welder, the injector flow tester... But the welder was the most recent acquisition and I got it in hopes to do this project!

[@revswithkevs5117]

Awesome build! I clicked on this just cause how unique this project was lol keep up the great work!

[@derekcurtis818]

Got my sub. I Love this thing! It sounds good!

[@Fackler91]

Awesome video! Really enjoyed it

[@RadDadisRad]

This sounds really fun. I have a supercharged f150 and it’s addictive. Sounds like this is 300-350whp and equal amounts of torque. Torque is a beautiful thing.

[@doug_1489]

that's really cool! you have to be able to use the power, that thing looks like fun 👍🏼👍🏼

[@theprimegoatgod5660]

Just stumbled across you, sick build and new sub😁

[@adamossowicz2611]

As an Aussie, I must inform you that you may not call it a super roo as that marque is already taken by an Australian Muscle classic icon. The Ford Australia Falcon Super Roo. Love this build though, great work and great video!

[@baliblades]

I’m glad this video took off! Keep up the great work!

[@JohnDoe-bx6ri]

This is badass, just subbed!

[@SRQmoviemaker]

Ill always love the whine of a supercharged vehicle, it never gets old.

[@97rspsctt]

Bro this is awesome. It seems to run so smoothly.

[@captainobvious9188]

I had a 98’ 2.5RS from 98 to 2003ish. I used to roll with another 2.5RS guy every now and then that had positive displacement supercharger on his. It was pretty fun. It had fun throttle response turning corners with the awd that I never felt with a turbo. I always wanted to drive one of the supercharged S4’s but never found the chance.

[@AMT99100]

Using what you got I love this!

[@Josh.Davidson]

This is amazing. Sounds awesome!

[@Andrew_kiwi_AF]

This is bad ass! New sub right here :) love it mate!

[@agoodfellarad]

Awesome video thanks. Definitely earned a like and subscribe.

[@thatmitsubishikid2498]

One of the coolest diy builds I have ever seen on KZbin. Definitely just earned a subscriber

[@brians6749]

Nice work. Great project.

[@adammcglashan9191]

Love it man so cool! Just enough to make it fun 👌🏻

[@arielcarnochan6484]

This channel deserves wayy more subscribers man keep up the amazing work! Keeping the real car builds alive!

[@allenplant1702]

So cool to hear the Subaru growl under that whine! 😎 Nice job!

[@ivtec4fun55]

I appreciate your ingenuity and execution. Nice.

[@jphdg]

Awesome build. Love this...

[@billyhighfill]

Well done!!💪

[@JasonLuther1]

Great work man, this makes me want to develope some cad skills

[@youngtrashbag7017]

Underrated channel. I'm looking forward to more videos, man.

[@YTRINX]

I see many subscribers in your future, good luck and I'll watch your career with great interest!

[@Jamk14]

That thing sounds sick. 7k subs needs more such good quality

[@B0B_J0HN]

You are a legend man, just slappin shit together and making it work! Fuckin legendary!

[@TheTontomtoofat]

Hey! A new favorite channel! Cool build!