4g64 Dohc Cost Breakdown and FAQ

[@interstatemotorcompany2355]

Dude - I cannot thank you enough for this breakdown. I was literally texting back and forth with my brother about doing this build when your video showed up in my subscriptions. Very, very helpful! Keep it coming! Looking forward to the turbo build.

[@RvaJay]

Glad I could help! That's why I make these videos.

[@randoawesomemix9501]

I just finished buying EVERYTHING to manual swap my 1995 Galant LS with a '96 GST trans. Using a lightened flywheel and kevlar single disk clutch. I'll be using your head swap tutorial for my next project. I LOVE the 8th Gen magic you got here.

[@TomBudin]

im about to do this swap turbo with rods and pistons

[@maui3302]

Very helpful! I’m building my galant right now and plan to do a dohc swap as well and a manual swap, super helpful thank you ! 🙏🏼

[@RvaJay]

Good luck. Feel free to ask any questions on my Instagram

[@zproflipperfuri_1639]

I need help

[@elementalbreakdown7849]

I have been looking for info on this swap cuz I wanna do it in my mighty max. Thank you so much. Car community coming in clutch again baby much love

[@TheWreepa]

I had the same issue that you did with the stock injectors not sealing properly. I added an extra oring to push out the seals and a small washer to even put the bolt seat. Evo 8 injectors are longer and have these special spacers that sit between the rail and the manifold. I my seals just went out so I think ima grind it down also and get rid of the washers.

[@MichaelMams]

I’ve been waiting for a video like this forever!!! Thanks

[@bko120576]

Great write up, and much respect for taking the time out to make and share this with the masses. Once you start adding HP with a turbo your next issue is gonna be the gear box. The stock auto or the 3g 5 speed will not hold up and you will be looking at the Evo 8 in fwd configuration for reliability.

[@RvaJay]

Thank you. I’m not looking to make a ton a hp with the first setup. I want to make sure it mechanically sound, before I begin the awd swap. Then it’ll be time for built motor after that.

[@owenjaeckle8542]

This is awesome. I was considering doing a DOHC swap but had to sell my eclipse before I got around to it. I want to buy another eclipse. I loved that thing

[@djpollo2474]

Did you get one? 3g rs owner here

[@kevinnerney5677]

Good job & professional presentation.

[@dsmjaime]

GREAT freaking video man, keep it up 👍. I was surprised by the quality of this content.

[@RvaJay]

Thanks.

[@lewisphillips3601]

Dude you're awesome thank you so much for these videos I love my Galant and have always wanted to turn it into a track car everyone around me says it's impossible it'll never work or you'll spend too much money and it'll suck but you sir are helping me prove these people wrong and I thank you so much for that two thumbs up man

[@RvaJay]

“Don’t let the bastards wear you down” Glad I can help. The platform doesn’t get the love it deserves, and I think it’s because there’s just not enough information out there. It’s definitely capable.

[@reneeharewood5053]

The intake manifold can be cut shorter an weilded back also to avoid the fire wall

[@kaminoshi713]

You and ACG are motivation! I’m going with the 69 block in my dohc swap 4g eclipse

[@princenissan9121]

Dude I want to buy a 2000 galant and do this. Thanks you are helping me out!!!

[@RvaJay]

Glad I could help

[@LooseScrew901]

Thinking about doing a head swap on a 07 galant. Hard to find info out there. Love the breakdown and vids bro

[@shadowinfinityz2135]

thank you for the information, im an eclipse guy and just trying to understand my car

[@dakotamadigan8555]

I've been looking for this! Thank u so much! Can u get dyno numbers before u turbo too see how much the head sway can add by itself

[@RvaJay]

You’re welcome. Unfortunately, I’ve already started the turbo build and honestly I don’t think the small gain would be worth the cost of dyno time. I felt more of a difference doing the trans swap.

[@dakotamadigan8555]

@@RvaJay so even with the double overhead cam and everything with a tune maybe 10 to 20hp?

[@RvaJay]

@@dakotamadigan8555 A tune would defiantly make a difference, but with the stock ecu, stock intake and no tune...I'd say 10-15 hp is realistic.

[@dakotamadigan8555]

@@RvaJay Thank you, so if I plan to swap heads I should definitely go turbo as well

[@RvaJay]

It depends on you goals, but that’s really how you get yours moneys worth.

[@dronepilot260rc]

Great Video! I have a 2003 Mitsubishi Outlander AWD with the 4g64. Was thinjing about doing the DOHC swap but I might just boost the sohc and call it a day :-) I dont want a ton of power maybe just run 8-10 psi

[@Fconig1]

Ayyy, I got a 03 outie aswell, planning the same build. Good luck

[@Booleany]

Great Video. One question: If I run it with the stock hyundai cams do I still need the evo reluctor? Or am I even able to run it with the stock hyundai cams?

[@RvaJay]

I believe you do. I think it has something to do with how the reluctor is read by the sensor. You could also modify the Hyundai one to match the evo. Not 100% sure though.

[@ixevaztyan]

Hey man do you still have this car? Are you in the Galant forums? I been working on one and I would love you advice

[@eis-zj4qq]

Great budget build and alot of good info. 👍. If you were to swap a g4js into an Evo would you need the Evo cam and reluctor setup or would it run fine with the stock cams and reluctor ?

[@RvaJay]

The cams and the reluctor itself will fit. The housing needs to be from the Hyundai.

[@maxwelltannenbaum]

Thanks for the great content. For my project I am currently trying to decide if I should just do the G4JS head swap or a full G4JS engine swap. Curious to know your thoughts on this. The project car is a 1990 Sonata.

[@RvaJay]

I’m not familiar with the car. What engine is currently in it

[@maxwelltannenbaum]

@@RvaJay It's a G4CS (Hyundai version of the 4G64). I have decided to use the '92-94 Sonata cylinder head (same as 4G63) on it since that will match the left side facing engine arrangement. I think the the biggest unknown for me looking ahead will be figuring out the ecu/wiring.

[@mitsubishikid1187]

@@maxwelltannenbaum the sohc g4cs will likely need custom pistons to run a dohc head, if I were in your spot i'd buy some forged 4g64 pistons, designed for use with a 4g63 head Wiseco makes some HD ones, but you might need 7 bolt 22mm wrist pin rods that go to 6 bolt crank.

[@100degeneracy7]

Did you end up having to tune it at all after the head swap or is it just bolt, install, and play?

[@RvaJay]

Tune isn’t required for the headswap. It will run perfectly fine.

[@Jmk12375]

im 2 years late on this vid but i have a 01 galant es 161k mileage the old owner drove it like a grandma n i wana do the dohc head swap from the evo 8 on it, im just worried abt the block, i've done the basic tune up besides fuel injectors, ik its a cast iron block which can hold power but would my engine be able to run fine/push it when i give it gas. would i be fine doing the head swap with my mileage

[@4077661466jp]

So is factory ecu need to be chiped/remapped ? Being rpm range has increased ?

[@RvaJay]

The stock ecu will run fine. The car did “feel” faster after the head install. A tune would def. help get the most out of it.

[@josephfigueroa3527]

Damn, could've just grabbed the whole G4JS engine and done a full swap for that money.

[@RvaJay]

Very true. Keep in mind half of the cost was in the machine work.

[@jairoarmenta3630]

Dude ¿what exhaust system do you have? Sounds really nice and that muffler/pipe looks great

[@RvaJay]

It’s a random eBay exhaust for the 3g eclipse that I extended to fit the Galant. It does have a 2ft resonator which helps eliminate rasp

[@thabetamrani9699]

Ingiction coil , is the must important thing about electricity in this car, beacuse if the coil have problem they flam the ECU transistor😮

[@dronepilot260rc]

Seems like a ton of work for the head swap. Probably will just keep the sohc head on my outlander and just boost it lol AWD and boost = FUN

[@RvaJay]

It’s actually pretty easy. It can be done in a day if you have all the parts. Depending on how much power your aiming for, the sohc head will become a restriction. If you just looking to add a little power. Then it’s definitely more cost effective to just turbo.

[@dronepilot260rc]

@@RvaJay I'll definitely keep an eye on your build. I may boost it first and then head swap down the road if the motor blows lol

[@mitsubishikid1187]

Great info in these videos, so I might have missed it, but are those the stock Galant/3g eclipse ignition coils or are you using hyundai/kia ones?

[@RvaJay]

Thanks. I’m currently running the stock galant coils with Evo wires. You can run the Hyundai’s coils and wires.

[@elijahstewart1333]

i wanna do this to my 02 3g eclipse but damn is car stuff expensive and really hard to find any support on 4g64s. does it raise the rev limit on the engine? what im looking for is revs so i dont have to put such insane amounts of boost to hit my goal, i only want 400hp

[@RvaJay]

Just take your time and research, mistakes cost money. 400hp is a lot out of these engines and you’ll definitely have to spend some money to get there.

[@DriftingEra]

What generation Evo you got the fuel rail and intake? Thank u

[@RvaJay]

Evo 8 or 9, I have a fuel rail for sale if you’re interested. Message me on Instagram

[@carguynewb7856]

Is it possible to used 2 Mitsubishi single cam heads and put them inside the hyundai/kia valve cover?

[@carguynewb7856]

Im still a newb to Mitsubishi engines btw

[@RvaJay]

No, they’re completely different

[@Mrpyro187]

Is it imperative to use EVO 8 parts. Because the time you made this video and to now…. Parts are crazy expensive. You keep saying Evo but which one? Other than these two questions, bro legit video. I never thought about upgrading the 4g64. I’m used to doing that with Hondas. Using a B20 with a B16 vtec to make a b20 vtec. So this right here…. Whoop whoop 🙌

[@RvaJay]

You can use some of the Hyundai stuff (cams) if you’re staying NA. If you plan on boosting, the evo cams, cam gear and valve train are the way to go.

[@Mrpyro187]

@@RvaJay hey man thank you very much. And what about the intake, do I have to use the Evo intake if I don’t intend to boost? I heard what you said about the bigger Hyundai one. But I’m asking about a more shallow intake LIKE the Evo.

[@RvaJay]

@@Mrpyro187 The stock Hyundai will work. On the 3g I believe you need make some room with a hammer to make it clear the firewall. It's not much though.

[@Bombards.]

Did it change the sound of the exhaust

[@RvaJay]

I don’t think so. If it did it wasn’t noticeable.

[@danielchristensen560]

I have the 2.4l In my 03 eclipse rs. Which is the 4g64 right? And I want to make it DOHC, would the 4g63 head work??

[@RvaJay]

Your car has the 4g64. Either the dohc 4g63 or G4js head will fit

[@danielchristensen560]

@@RvaJay thank you man appreciate at you

[@THEREAL1DANNYBEACH]

Subbed. 00' 🌒GS

[@3_Turner]

Need to find another shell and cut it. Go for fastest all motor galant 👀👀

[@RvaJay]

That'd be like 14s lol

[@halfbak3d]

So, the stock eclipse intake mani and fuel rail won't be usable with the DOHC swap?

[@RvaJay]

Right. You have to use the Kia or evo intake manifold with the dohc head.

[@BuildBoostDrive]

What piston compression are you looking at now that you've gone from the sohc to the dohc cylinder head?

[@RvaJay]

I believe it drops it down to 8.5 1

[@pedroechevarria971]

So can I use this head on a 4g69 Mitsubishi lancer rallyart 2004????

[@RvaJay]

Yes you can

[@wombatspork1790]

Did you deck the head ? What does it do for the compression ratio

[@RvaJay]

The head was decked. The head with stock pistons lowers compression

[@wombatspork1790]

Yeah I was going to go the piston route to change the compression. Thanks again

[@eis-zj4qq]

Do I have to change any internals in the block to run a dohc head on a 4g69 or 4g64?

[@RvaJay]

No, you dont have to touch the internals.

[@troublesyodaddy6150]

Quick question man would a 2005 Evo 8 intake manifold work ?

[@RvaJay]

It will work

[@elijahstewart1333]

did i miss the ECU part? the stock ECU is just fine with the head swap?

[@RvaJay]

The stock auto ecu will work with the dohc head

[@elijahstewart1333]

@@RvaJay oh siiiick mines an auto

[@pugjoe3915]

Sorry to bother you again but which evo manifold did you use evo 8?

[@RvaJay]

Yes

[@THEREAL1DANNYBEACH]

@@RvaJay good,man.

[@sushikid295]

Any ECU work or is it the stock one?

[@RvaJay]

Either stock ecu (auto/manual) will work

[@sushikid295]

@@RvaJay thank you!

[@sushikid295]

@@RvaJay than you!

[@ultrainstincts7564]

Anything for 4g93 sohc block and what head?

[@RvaJay]

The head will fit, but you’ll need a different timing belt.

[@Random-nf7qb]

Would this work on a 1997-2003 4G63 Galant? Same head as the sohc 4G64

[@mitsubishikid1187]

it likely will, but some components would need to be different in your case, you would need an evo timing belt because your engine is a 4g63 you won't need the longer 2.4 timing belt and you will need evo cam gears.

[@halfbak3d]

You goona turbo it next? I turbo'd my 04 eclipse auto GS, still SOHC. Next is DOHC swap. Edit: Finished the video.. I see you're turboing it lol.

[@peytonvogt3319]

You still doing it? I have the same exact car and I’m thinking about a Dohc swap with a turbo kit

[@halfbak3d]

@@peytonvogt3319 Going to get the rebuilt head next week.

[@peytonvogt3319]

@@halfbak3d dope 👍 leaving it auto or manual swapping?

[@halfbak3d]

@@peytonvogt3319 I want to swap it eventually. But I cant seem to find a donor car, or even a manual in a junkyard near me. Cash also has gotten tight recently, so cant really get it unless I can find everything for like $400 bucks.

[@peytonvogt3319]

@@halfbak3d I get that, thankfully I see them all over junkyards near me so I’m hoping to catch a manual soon.

[@wombatspork1790]

Dude you should have much larger following

[@RvaJay]

Thanks, we’re getting there. Remember to help spread the word.

[@giltorres5310]

What ecu are you running and what type of wiring work did u do

[@RvaJay]

I was running the stock auto ecu. The only wiring involved in the head swap is extending wires for the cam sensor and coil packs

[@BilalKhan-oq9ci]

5

[@killerrush77]

WTF!!!! less than $100 for that head? i know what not an EVO head, but man, my EVO head cost like 2K.

[@RvaJay]

That’s what makes this project so appealing. I feel like there’s a lot of potential left in this head