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davisj3537
07-10-2008, 01:54 PM
This all depends on your budget. If you are not incorporating Kpro into your budget then your choices are limited. I'll kinda touch this up the next couple of days.

Kpro not required but advised

K20a2-Must be used with k20a2 ecu. Great top end power but slow down low. Revs higher than anything else USDM. Has oil jets to keep the pistons cool

K24a1-Must be used with 310cc injectors with NO MODS. Great power down low and much cheaper than the k20a2. Does not make top end power or rev high like the a2.

K24a4-Must be used with 310cc injectors with NO MODS. Very similiar to the k24a1 but a little cheaper to buy. The cost saved on the motor will be spent fixing the water port issue.

Kpro is a must

K20a-Very hard to find and very expensive just like the K20A2 but it comes with different cams and higher cr pistons. Has oil jets to keep the pistons cool

K24a2-The most powerfull engine. Makes tq down low and makes power up top and still revs decently high. Has the same water port issue as the k24a4. Has oil jets to keep the pistons cool just like the k20a2 and k20a.

K24a1 block w/ A2 head- Great boost motor. Has no oil jets so you don't want to get too crazy on the stock block. This is called the poor man's tsx motor. It will almost reach the same power level as the stock tsx but falls short since the k24a1 block has a lower cr. The k24a4 block can also be used but the pistons MUST be swapped out.

Before you go asking any questions about this thread...do some fucking searching cuz the answers are probably out there.

davisj3537
07-10-2008, 01:55 PM
If someone wants to write something up about the k20z3 and k20z1 then I'll add it in...I don't know much about them so I left them off till I get further info or feel like searching.

Kodeen
07-11-2008, 05:12 PM
Why can't you use the k24a2 with its stock ecu?

PAPITUYO326
07-11-2008, 05:22 PM
Its drive by wire, so there are no TPS sensor inputs.

Nice thread Davis. Don't forget to add the k24a1 to the list with kpro. Its a good motor with bolt ons and the right tune.

Also, I'm going to disagree with saying that you MUST run 310cc injectors. Its recommended, but the 270ccs have more than enough of a ceiling to provide acceptable fueling. You will run closed loop (no kpro, partial throttle) most of the time, so you will not have any fueling concerns there. Full throttle might be a little lean depending on the mods, but not enough IMO to warrant saying you can't use the 270ccs.

davisj3537
07-13-2008, 07:58 PM
Its drive by wire, so there are no TPS sensor inputs.

Nice thread Davis. Don't forget to add the k24a1 to the list with kpro. Its a good motor with bolt ons and the right tune.

Also, I'm going to disagree with saying that you MUST run 310cc injectors. Its recommended, but the 270ccs have more than enough of a ceiling to provide acceptable fueling. You will run closed loop (no kpro, partial throttle) most of the time, so you will not have any fueling concerns there. Full throttle might be a little lean depending on the mods, but not enough IMO to warrant saying you can't use the 270ccs.

Oh I was trying to say that without kpro you have to have them...with kpro you can certainly run the 270s.

blksi02
07-15-2008, 01:31 PM
good info. I would be interested to know exactaly what #'s the k24a1 block could handle incomparison to the a4 both with a2 heads on boost.. most likely going to be my next motor once i blow this a3 up

davisj3537
07-15-2008, 02:57 PM
good info. I would be interested to know exactaly what #'s the k24a1 block could handle incomparison to the a4 both with a2 heads on boost.. most likely going to be my next motor once i blow this a3 up

Well the a4 is in a totally different cattegory since you have to change pistons to put on the a2 head. The a1 block will hold a good 400whp.

koftaboy
07-17-2008, 06:48 PM
This all depends on your budget. If you are not incorporating Kpro into your budget then your choices are limited. I'll kinda touch this up the next couple of days.

Kpro not required but advised

K20a-Must have k20a ecu. Very hard to find and very expensive just like the motor below but it comes with different cams and higher cr pistons. Has oil jets to keep the pistons cool

K20a2-Must be used with k20a2 ecu. Great top end power but slow down low. Revs higher than anything else USDM. Has oil jets to keep the pistons cool

K24a1-Must be used with 310cc injectors with NO MODS. Great power down low and much cheaper than the k20a2. Does not make top end power or rev high like the a2.

K24a4-Must be used with 310cc injectors with NO MODS. Very similiar to the k24a1 but a little cheaper to buy. The cost saved on the motor will be spent fixing the water port issue.

Kpro is a must

K24a2-The most powerfull engine. Makes tq down low and makes power up top and still revs decently high. Has the same water port issue as the k24a4. Has oil jets to keep the pistons cool just like the k20a2 and k20a.

K24a1 block w/ A2 head- Great boost motor. Has no oil jets so you don't want to get too crazy on the stock block. This is called the poor man's tsx motor. It will almost reach the same power level as the stock tsx but falls short since the k24a1 block has a lower cr. The k24a4 block can also be used but the pistons MUST be swapped out.

Before you go asking any questions about this thread...do some fucking searching cuz the answers are probably out there.

how about the K24a2 can you rev high with that motor long block? and also do i have to get a 6 speed tranny for that swap or i can just use my a3 tranny with some mods??

Mickey
07-17-2008, 09:23 PM
K20A ECU is not OBDII. Just use any k series ecu (USDM) with K-Pro and call it a day. You will not pass smog with the JDM ecu.

davisj3537
07-18-2008, 06:00 AM
how about the K24a2 can you rev high with that motor long block? and also do i have to get a 6 speed tranny for that swap or i can just use my a3 tranny with some mods??

Depends on what you consider high. I wouldn't take it over 7800. Either tranny is fine.

davisj3537
07-18-2008, 06:01 AM
K20A ECU is not OBDII. Just use any k series ecu (USDM) with K-Pro and call it a day. You will not pass smog with the JDM ecu.

Interesting...I didn't know that. So will the k20a run off a k20a2 ecu without kpro is the next question. I know kpro is optimal but will it run without any codes...anyone know?

Mickey
07-18-2008, 08:38 AM
Interesting...I didn't know that. So will the k20a run off a k20a2 ecu without kpro is the next question. I know kpro is optimal but will it run without any codes...anyone know?

It will not run without K-Pro.

davisj3537
07-18-2008, 09:03 AM
It will not run without K-Pro.

UPDATED. Thanks Mickey:msmooch:

ALep3
07-22-2008, 12:43 PM
you have a link to the water port issue for a K24a4 I'm getting a great deal on one but dont want to much of a hassel I thought all I had to do was change the water pump housing.

edit nevermind I found it

frm_808
07-22-2008, 01:01 PM
sticky sticky!!

bchaney
07-22-2008, 08:01 PM
Could someone elaborate on the a4 water port issue?

jalep3
07-22-2008, 08:25 PM
^^yeah that

NHBP ep3
07-23-2008, 12:24 AM
yes what is this talk about the k24a4 and k24a2 water port issue?

frm_808
07-23-2008, 12:52 AM
find your answers on k20a.org:peace:

davisj3537
07-23-2008, 08:18 AM
The two easy plug and play fixes are getting a rbc and karcepts adapter plate to go with it or you can get the hasport adapter.

NHBP ep3
07-23-2008, 04:20 PM
if i was to get the hasport adapter i could avoid getting the rbc and just use the tsx mani?

davisj3537
07-24-2008, 05:58 AM
if i was to get the hasport adapter i could avoid getting the rbc and just use the tsx mani?
You can use the tsx manifold in place of the rbc. you still need the karcepts adapter. Good point. I forgot all about using the tsx manifold.

bchaney
07-26-2008, 07:32 PM
So 310cc injectors for an a1/a4 without kpro... what about with kpro?

Guardian
07-27-2008, 02:12 AM
So 310cc injectors for an a1/a4 without kpro... what about with kpro?

stock

davisj3537
07-27-2008, 10:40 AM
With kpro you can keep stock injectors and mod all you want...but without kpro you can't have any mods and must use 310cc.

cantonep3
08-01-2008, 10:53 PM
found some good info for a quick comparison sheet

http://en.wikipedia.org/wiki/Honda_K_engine

davisj3537
08-02-2008, 11:30 AM
found some good info for a quick comparison sheet

http://en.wikipedia.org/wiki/Honda_K_engine

Damn good find sir!

magmagik 1
08-06-2008, 03:30 PM
a4 bottom high comp pistons and a build a2 head..

bchaney
08-06-2008, 04:29 PM
Did you ppl read the first post?

Must have things to sell...