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Everything you need to swap a k20a2 into an EP3

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Old 11-12-2010, 11:50 AM   #26
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Default Re: Everything you need to swap a k20a2 into an EP3

Considering the Ep3 as the next purchase (currently have 92 si), whay kind of power numbers does the stock engine have? and what are you looking to accomplish with this swap?
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Old 11-12-2010, 01:47 PM   #27
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Default Re: Everything you need to swap a k20a2 into an EP3

stock engine has 160, k20a2 has about 200. the k20a3 (stock ep3 motor) has no potential and is pretty pointless to do anything with besides get good gas mileage and its eco friendly. you can make good numbers on a stock a2 also and its a simple swap
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Old 12-10-2010, 04:59 AM   #28
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Default Re: Everything you need to swap a k20a2 into an EP3

Ehh, the k20a3 has a lot of boost potential.
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Old 12-16-2010, 07:35 PM   #29
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Default Re: Everything you need to swap a k20a2 into an EP3

I did this swap for a friend. 03 ep3 and I used the k20a2 engine harness. I ran into 2 small issues that I havne't seen covered anywhere unless i missed it.

1. the AC no longer works, is there a difference in wiring pin outs on the ecu?

2. water temp on the gauge cluster no longer works either. do I need to add a sensor on the radiator hose?

thanks.
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Old 12-17-2010, 08:54 PM   #30
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Default Re: Everything you need to swap a k20a2 into an EP3

You can keep the 5spd. and not fiddle with the 6spd. right?
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Old 01-07-2011, 09:23 PM   #31
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Default Re: Everything you need to swap a k20a2 into an EP3

i assume this is similar for a k20a3 swap, correct?
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Old 02-10-2011, 11:21 AM   #32
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Default Re: Everything you need to swap a k20a2 into an EP3

I got a k20a3 and I just bought a k24a1 is that good for a swap or to do a frankinstan
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Old 02-13-2011, 10:16 AM   #33
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Default Re: Everything you need to swap a k20a2 into an EP3

if i buy a k20a2 swap that includes the original key and cylinder, will i be able to start the car without a reflash?
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Old 03-10-2011, 05:06 PM   #34
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Default Re: Everything you need to swap a k20a2 into an EP3

good info here.
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Old 04-06-2011, 10:47 PM   #35
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Default Re: Everything you need to swap a k20a2 into an EP3

can u use a RSX ECU on a stock EP3 ?????
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Old 04-26-2011, 09:58 AM   #36
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Default Re: Everything you need to swap a k20a2 into an EP3

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Originally Posted by poeticfinesse21 View Post
if i buy a k20a2 swap that includes the original key and cylinder, will i be able to start the car without a reflash?
I wouldn't change your car to the key original to the k20a2; use your car's original and get Honda/Acura to work with your immobilizer. If you are talking about a non k series native car, I can't help you there; you probably must use Kpro.

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You can keep the 5spd. and not fiddle with the 6spd. right?
Yes but I'd expect to fall out of Vtec when shifting.
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Old 05-02-2011, 10:05 PM   #37
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Default Re: Everything you need to swap a k20a2 into an EP3

so i was wondering what all is needed to put a k24 into my ep cause i am at a stand still with performance parts dont want to spend useless money on things i do not need so if anyone could help that would be great, and sorry if this has already been answered
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Old 06-20-2011, 05:32 PM   #38
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Default Re: Everything you need to swap a k20a2 into an EP3

If i wanted to put a k20a2 into a base model rsx(k20a3) do i need the k20a2 harness or can i use the a3 harness and will the a3 harness plug into the a2 ecu?

Leaving the 5 speed tranny for now.

I just want to swap the motor so im thinking i just need the motor and ecu, am i missing anything?
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Old 07-25-2011, 04:36 PM   #39
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Default Re: Everything you need to swap a k20a2 into an EP3

good info, very helpful for people doing their first swap!
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Old 07-26-2011, 06:09 PM   #40
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Default Re: Everything you need to swap a k20a2 into an EP3

So I can use the ep3 ecu just get it rekeyed at Honda right?
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Old 07-26-2011, 06:56 PM   #41
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Default Re: Everything you need to swap a k20a2 into an EP3

no you use your ep3 ecu to get it to a dealer then you have them rekey the RSX ecu to work with your factory key and immobilizer.

I don't understand why you guys don't just do an A2 head swap with some high compression pistons.
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Old 07-27-2011, 03:33 PM   #42
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Default Re: Everything you need to swap a k20a2 into an EP3

Can I swap the longblocks no problem? Also I deleted my ac in my ep3 so will I run into any issues?
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Old 08-30-2011, 10:29 AM   #43
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Default Re: Everything you need to swap a k20a2 into an EP3

Nice write up. So you had no problem pulling the engine the the transmission attached and everything, very cool. I think if you swapped the crank pulley from the a3 to the a2 you wouldn't have the belt at the edge of the specs... maybe someone else can confirm this?
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Old 11-29-2011, 07:56 PM   #44
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Default Re: Everything you need to swap a k20a2 into an EP3

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Originally Posted by LimitedSC2k1 View Post
Nice write up. So you had no problem pulling the engine the the transmission attached and everything, very cool. I think if you swapped the crank pulley from the a3 to the a2 you wouldn't have the belt at the edge of the specs... maybe someone else can confirm this?
Good thought but I'd rather use the belt at the edge of spec (worked fine for me for 10,000s of miles) than do a crack pulley crank swap and try selling the a3.
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Old 03-04-2012, 08:50 PM   #45
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Default Re: Everything you need to swap a k20a2 into an EP3

I'm looking to buy a new EP3 motor any good suggestions on where to look?
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Old 03-07-2012, 12:53 PM   #46
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Default Re: Everything you need to swap a k20a2 into an EP3

Can someone tell me what is needed to do the K20a2 cam swap into a 2002 Honda Civic Si with the K20a3?
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Old 03-21-2012, 05:20 AM   #47
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Default Re: Everything you need to swap a k20a2 into an EP3

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Originally Posted by edsyks View Post
I'm looking to buy a new EP3 motor any good suggestions on where to look?
I'd buy private (on here, ephatch, craigslist, local auction, etc.) but it sounds like a good time for a swap. :D
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Old 10-02-2012, 11:00 PM   #48
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Default Re: Everything you need to swap a k20a2 into an EP3

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Originally Posted by reaction360 View Post
I did this swap for a friend. 03 ep3 and I used the k20a2 engine harness. I ran into 2 small issues that I havne't seen covered anywhere unless i missed it.

1. the AC no longer works, is there a difference in wiring pin outs on the ecu?

2. water temp on the gauge cluster no longer works either. do I need to add a sensor on the radiator hose?

thanks.
Why was he not answered? ....... You cant keep P/s? Did your a/c work after the swap. "plug and play"?
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Old 10-18-2012, 01:50 PM   #49
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Default Re: Everything you need to swap a k20a2 into an EP3

Wish I had enough money for a swap lol but maybe one day......
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Old 10-18-2012, 01:53 PM   #50
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Default Re: Everything you need to swap a k20a2 into an EP3

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Originally Posted by WhiteOnRice View Post
Ehh, the k20a3 has a lot of boost potential.
This is very true. The stock motor can easily get to the k20a2 but well if you have the time and money than I guess you can go for the k20a2 but thats alot of money for sligthly faster engine. Don't they range from like 4500-6000k?
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