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Old 03-29-2013, 11:47 PM   #1
Mario_pic
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Default Idea 02 Wrx with Honda k20a turbo motor on Wrx tranny

Ok I know what u guys are going to say but i like the challenge
What I was thinking is getting an adapter made to fit a Honda k20 or k24 motor to a ej20 tranny and run a small turbo setup on it I got lots of Honda k motors and have a race harness for k20 motor was wondering what u guys think if it's worth a try for fun other thing I was thinking the Honda k20 motors are good for abuse at high rpm

What u guys think
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Old 03-30-2013, 02:30 AM   #2
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probably the length would cause the engine not to fit ( even after building an adapter for the transmission). I like the k20's , had one in my ek back in 09. If anything look into the J32's , its v6 so the length of the engine would be shorter, and also they make nice power... but either way still a ton of fab and machine work, and wiring...
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Old 03-30-2013, 02:36 AM   #3
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Is this even possible? I'm not bashing your idea, I think it's great if it can happen. I love Hondas as well as my bugeye .. Not even talkin about a K, but could any B, H, D, J, F series fit in a Subaru?
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Old 03-30-2013, 11:31 AM   #4
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This gives new meaning to: Subarus, the new Civics.
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Old 03-30-2013, 11:45 AM   #5
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Or you can use the stock EJ20, throw on basic bolt ons (exhaust, reflash etc..) and make the same power, with more torque and keep your low center of gravity.
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Old 03-30-2013, 12:12 PM   #6
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Lol a older b or h spin backwards so it's not going to work the newer k motors spin same way as the ej20 I love ej20 don't get me wrong but it's a pain in the ass to find and buy parts for plus wireing is simple thay make a one off harness for race cars for 800$ last time I looked but Its easy to fab ur self plus Honda ecu supports diffrent speedos u can calibrate the speed and it outputs as well so u can use it to make the Wrx speedo work also adapter plate is easy to make the flywheel spacer and bell housing spacer also if u can fit an ls1 vet motor a civic k motor will fit was thinking of using a na k24 thay out put 225 Hp at 190 lbs so it's close to stock ej20 spec if u turbo it with a small setup it makes more Hp then the ej20 Was wondering if some one on here has a blown Wrx tranny with input shaft still in it I need a dummy tranny to fit and size the adapter plate to join them
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Old 03-30-2013, 12:22 PM   #7
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Hell yea you should do it...Here's why, You have an itch to do so, you have the basic concept down, you have most of what it would take to do it, and your clearly smart enough to stand back and understand what it would take.

The adapter plate concept could work, but it adds another inch maybe two onto the front of the engine. I explored this concept for a rotory swap, same basic idea, spacer for the flywheel and an adapter for the bellhousing, the diffrence here is you want to stick an inline four in, that's almost as long as an ls1 v8. I've abandoned this idea twice now because by the end of my measument the engine is sticking out of the grill before it has a radiator...and then the catosrophic effect hanging that much weight over the front axle will play on handling, don't get me started.

I don't like honda's at all....I do like builders with passion and orginality...that's cooler then what ever the hell they build weather I like it or not.
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Old 03-30-2013, 04:11 PM   #8
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Hell yea you should do it...Here's why, You have an itch to do so, you have the basic concept down, you have most of what it would take to do it, and your clearly smart enough to stand back and understand what it would take.

The adapter plate concept could work, but it adds another inch maybe two onto the front of the engine. I explored this concept for a rotory swap, same basic idea, spacer for the flywheel and an adapter for the bellhousing, the diffrence here is you want to stick an inline four in, that's almost as long as an ls1 v8. I've abandoned this idea twice now because by the end of my measument the engine is sticking out of the grill before it has a radiator...and then the catosrophic effect hanging that much weight over the front axle will play on handling, don't get me started.

I don't like honda's at all....I do like builders with passion and orginality...that's cooler then what ever the hell they build weather I like it or not.
Lol I had lots of civics but I loved awd cars Iessed with a awd civic setup but Honda awd transmissions suck ballsack so I gave up s2000 swap was posible but stupid expensive so I just got a Wrx I'm happy with the stock 2.0 turbo but not the oiling problems u get with them when u drift plus Hondas are stupid easy to find parts for subarus I find it either u go Sti or find a beat up stock ej205 plus a Honda motor in a Wrx whould be fun to see so far I got most of. The k20 harness maped out all I got to do is see if I can splice in to the Oem dash harness or just swap a full civic harness over there stupid easy to remove we will see I'll post some wireing diagrams and try to figure best and cleanest way to add the k20 but still be able to go back to the oem setup if I want in future



here is update had a spun ej20 crank laying around and a k20 fly wheel :P here is result

i got the k20 flywheel to bolt to the ej20 crankshaft its not 100% but it gives me an idea that i can redrill the ej20 flywheel to fit the k20 crankshaft 100%



here is a close up of the bolt holes and the diffrence the k20 has bit flywheel bolt holes vs the ej20 so it works to my advantage

im going to lay a sheet over the ej20 tranny bell houseing and a sheet over the k20 motor houseing and see what orintation whould work best when i over lap the 2 sheets

Last edited by Mario_pic; 03-30-2013 at 04:59 PM.
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Old 03-30-2013, 05:23 PM   #9
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How tall is the K20 from the crank's centerline to the top of the engine?

What's the GD's height of the engine bay, from the transmission input shaft's centerline to the bottom of the hood?

Basically, will the K20 even fit?
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Old 03-30-2013, 05:35 PM   #10
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i got go check it out i got a k24 its taller so if its will make hood able to close it be nice worst case cut hood out like thay do on v6 civics lol :P and have hood mount turbo :P

the from middle of crankshaft on the k24 is 19 inchs from crank center line to top of cam cover and from front of crank pully to flywheel bellhouseing its 22 inchs if u add the thick ness of the plate im thinking of useing i dont got my wrx with me but i can always get a narow rad civic rads are punty thin thay dont use big rads but i can get a thick core rad thats half the size or a wrx one in with just deeper should get by its going to be close its 5 inchs longer then the wrx crank pully one thing is if u look at the h6 swap its 4 inchs bigger then the ek20 is so extra inch is not to bad if u think about it the hight is going to be the problem but top mount turbo will look sick if u ask me lol

Last edited by Mario_pic; 03-30-2013 at 05:49 PM.
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Old 03-30-2013, 08:03 PM   #11
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You'd have to add an inch or so for the bell housing convertion, h6 gc you can either delete the a/c condenser and use push fans and stock rad. or get a cutom radiator that sits deeper in the core and retain the stock fans. I'm thinking if you use a little applied technique from both idea's "cutom rad and pusher fans" that make up for the extran six inchs over all. Just keep in mind while the weight of the engine may not be much diffrent, it is gonna push that weight foward witch will effect handling, factor in atleast some stiffer springs
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Old 03-31-2013, 01:36 AM   #12
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i was thinking of a useing a 99 civic k swap rad because the civic has same problem with k20 swap intake manifold is to close to rad so thay tuck it under a bit and have an inline hose fill tube to top up the rad it works well also still lets u have the ac attached as well also i added 2 inchs for the bracket id need to fab to the length i gave
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Old 03-31-2013, 08:52 AM   #13
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you will never fit the k series in with the AWD transmission. if you go RWD and push trans back towards the firewall you could fit the inline 4. thats the only way guys can fit ls1s
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Old 03-31-2013, 11:15 PM   #14
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If the engine won't fit thay make a kit to adapt a s2000 tranny thoes things can take a beating to vs the ej20 tranny only problem are s2000 diffs split because there aluminum so I think I'd be able to Go that way worst case
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Old 04-02-2013, 12:54 AM   #15
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Quote:
Originally Posted by Mario_pic
Ok I know what u guys are going to say but i like the challenge
What I was thinking is getting an adapter made to fit a Honda k20 or k24 motor to a ej20 tranny and run a small turbo setup on it I got lots of Honda k motors and have a race harness for k20 motor was wondering what u guys think if it's worth a try for fun other thing I was thinking the Honda k20 motors are good for abuse at high rpm

What u guys think
Honda does make great engines. However if you've played enough with the Subaru stuff, it's fairly simple.




Here it is at 8000rpms



And at 9000 RPMs!
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Old 04-02-2013, 09:34 AM   #16
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Subaru engines are really easy to work on and fairly simple to make decent power out of, then there's also 3l swaps that are hella fun too, but...I personally don't love subaru engines myself, while n/a applications are very reliable as soon as you start boosting them the problems begin. This is generaly the case with most engines anyways, so in that realm I don't think boxxers are any better or any worse.

If your fall back plan is to make it rwd then I can't say I love the idea of the swap. The symetrical all wheel drive in these cars is by far hands down the best thing about them, while the swap would be cool for posterity a swap utilizing the Awd would be amazing and as far as I know hasn't been done yet....bottem line its not that hard to do...people give up on the idea and shoot for rwd too soon
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Old 12-23-2013, 09:39 AM   #17
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Some updates in this project? It's really interesting.
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Old 02-06-2014, 11:04 AM   #18
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I'd like to see updates too, been mocking this up on my own with a k24z3 and a 2003 Wrx transmission, definitely looks like it's meant to be..
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Old 02-06-2014, 11:04 AM   #19
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Old 05-11-2016, 05:00 PM   #20
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Default Any updates? To this build

Any updates to this build ?
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Old 05-11-2016, 11:00 PM   #21
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Quote:
Originally Posted by Hondaslayer View Post
Or you can use the stock EJ20, throw on basic bolt ons (exhaust, reflash etc..) and make the same power, with more torque and keep your low center of gravity.
Ej20 won't make the same horsepower and torque of a turbo k20. I also thought of this idea, bump for a 2 year old post.
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Old 07-12-2016, 06:31 PM   #22
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Anyone trying it? It would be pretty cool to see. Or even a f20 s2k motor.
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Old 07-12-2016, 10:57 PM   #23
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I like the idea the engine bolted onto the tranny looks quite tall as mentioned earlier in the thread but the EJ top mount and shroud for the scoop has a bit of height as well
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Old 09-14-2016, 09:59 PM   #24
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Bump
Thought of a k20 swap into a wrx myself, if you could get it to work with the AWD system, it could be KILLER! But if you couldn't make it work with AWD that would almost defeat the purpose of the swap...the problem with Hondas is lack of traction...it's not uncommon for a k20 to be able to make 500whp fairly easy turbocharged...my brother has a 2010 civic si, he's going turbo, shooting for around 500whp...Imagine that kind of power with the high revving k20 with awd launch!......anybody been able to get this swap done into a wrx yet?
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