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K20 head on a r18a1???

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Old 02-17-2010, 06:56 PM   #1
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Default K20 head on a r18a1???

Whats goin on,
i recently have had a 2010 civic with the automatic sohc i-vtec r18a1.
and i was wondering along with i/h/e since i cant do a tranny swap what would give me a little more power. can i have some more input??

Last edited by fg10; 02-17-2010 at 07:30 PM.
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Old 02-21-2010, 12:54 AM   #2
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Default Re: K20 head on a r18a1???

wont fit ur bottom end sohc < dohc
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Old 02-21-2010, 03:40 AM   #3
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Default Re: K20 head on a r18a1???

Quote:
Originally Posted by fg10 View Post
Whats goin on,
i recently have had a 2010 civic with the automatic sohc i-vtec r18a1.
and i was wondering along with i/h/e since i cant do a tranny swap what would give me a little more power. can i have some more input??

R18A1?
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Old 02-21-2010, 11:52 AM   #4
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Default Re: K20 head on a r18a1???

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R18A1?
R18A1 = DX - EX-L
R18A3 = CNG
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Old 02-21-2010, 06:48 PM   #5
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Default Re: K20 head on a r18a1???

Yeah sorry cuz, a twin cam head won't fit on a single cam block. Maybe look into nitrous after you've done the necessary bolt-ons for a bit more power? Quick, cheap, easy, and surprisingly fun, especially after you beat a few people who think it's "just" a single cam haha.
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Old 02-21-2010, 07:37 PM   #6
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Default Re: K20 head on a r18a1???

i told you so lol
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Old 02-21-2010, 07:39 PM   #7
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Default Re: K20 head on a r18a1???

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Originally Posted by obeyphysics View Post
Yeah sorry cuz, a twin cam head won't fit on a single cam block. Maybe look into nitrous after you've done the necessary bolt-ons for a bit more power? Quick, cheap, easy, and surprisingly fun, especially after you beat a few people who think it's "just" a single cam haha.
Figured I'd post on this.

Incorrect, but depends on the motor. Quite a few people have done a "G22" or "G23" where an H series head is put on an F series block.

Probably not the same case for the R18 though.
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Old 02-23-2010, 06:48 PM   #8
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Default Re: K20 head on a r18a1???

^ Okay, okay touche haha. I was more or less talking about the K20 head on the R18 block because as far as I know it shouldn't fit but I've been wrong before.
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Old 02-23-2010, 07:45 PM   #9
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Default Re: K20 head on a r18a1???

whoa, this is just like the other thread that got locked, except this one doesn't have asianskater91 busting out the science
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Old 04-28-2012, 08:46 AM   #10
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Default Re: K20 head on a r18a1???

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Originally Posted by obeyphysics View Post
Yeah sorry cuz, a twin cam head won't fit on a single cam block. Maybe look into nitrous after you've done the necessary bolt-ons for a bit more power? Quick, cheap, easy, and surprisingly fun, especially after you beat a few people who think it's "just" a single cam haha.
What are somebolt ons I should look at for my 2009 civic lx_s
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Old 05-01-2012, 06:13 AM   #11
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Default Re: K20 head on a r18a1???

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What are somebolt ons I should look at for my 2009 civic lx_s

Turbo is a bolt on

There really is not that much power to be had with the r18. If you want power, shoulda got an si
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Old 05-01-2012, 12:01 PM   #12
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Default Re: K20 head on a r18a1???

noobs hahah
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Old 05-02-2012, 09:28 PM   #13
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Default Re: K20 head on a r18a1???

if you want more power swap a kseries in there and start over...
...Should have bought an Si.
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Old 07-14-2013, 06:42 AM   #14
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Default Re: K20 head on a r18a1???

Its possible, i've seen it done. It takes ALOT of work. But it isnt worth it. If you want power out of your r18 your either going to have to strap a turbo to it, my recomendation would be something smaller (low boost but fast spool) or do an all motor build (internals, injectors, cam, intake, intake manifold, race test pipe, 3" exhaust, tune on flashpro running high octane fuel) and remove as much weight in the car as possible. I drive an r18, i love it. And having an extremely quick automatic r18 that can smoke si's is alot more unique than a fast si.
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Old 07-15-2013, 07:29 AM   #15
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Default Re: K20 head on a r18a1???

You've seen a K series head on a single cam block?


lol
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Old 07-15-2013, 01:18 PM   #16
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Default Re: K20 head on a r18a1???

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Originally Posted by atomicbmfa1 View Post
Its possible, i've seen it done. It takes ALOT of work. But it isnt worth it. If you want power out of your r18 your either going to have to strap a turbo to it, my recomendation would be something smaller (low boost but fast spool) or do an all motor build (internals, injectors, cam, intake, intake manifold, race test pipe, 3" exhaust, tune on flashpro running high octane fuel) and remove as much weight in the car as possible. I drive an r18, i love it. And having an extremely quick automatic r18 that can smoke si's is alot more unique than a fast si.
I have yet to see a k series head on an r18 block, I'd like to see a link for proof.

If the r18 auto tranny is anything like the d16 auto tranny, turboing the motor is a quick way to kill the tranny. They're not made for higher power levels. The Si is really the most cost effective way to make decent power. Not only do you start 55 HP up bone stock, but the motor and tranny are much stronger if you want to modify the motor.
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Old 07-15-2013, 01:48 PM   #17
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Default Re: K20 head on a r18a1???

OMG I never LOL'ed so hard haha
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Old 07-18-2013, 05:07 PM   #18
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Default Re: K20 head on a r18a1???

lol
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Old 07-20-2013, 08:47 PM   #19
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Default Re: K20 head on a r18a1???

Pics or it didn't happen...
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Old 07-20-2013, 09:21 PM   #20
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Default Re: K20 head on a r18a1???

now this i gotta see. k series head on r series block...... i call (:

otherwise OP should just keep car as is until you save for a full k swap.
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Old 07-21-2013, 01:08 PM   #21
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Default Re: K20 head on a r18a1???

OMG I love this thread guys! bahahaha
I cant tell you how awesome it is to login and browse through forums and find pointless a** responses like childs play and yet then everyone repeats each other (k series this and that)

come looking for answers or just general knowledge and get childish

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Old 07-22-2013, 12:45 PM   #22
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Default Re: K20 head on a r18a1???

Closing this cause there isn't really much more point having it open.
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block, boltons, cam, cng, fit, head, honda, k20, nitrous, r18, r18a1, r18a3, single, swap, twin

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