SlimBB4

****MANY WILL ASK WHY I AM DOING THIS SWAP RATHER THEN BUILD AN H22 OR SWAP AN F20 OR H23vtec****
"yes i had a freshly rebuilt jdm h22a with an m2b4 tranny. but to be honest... i sold my h22a, m2b4 tranny, innovative mounts, type s intake w k&n filter, chipped p28, for more then what i spent on the complete k20/k24 swap. so my additional spending has only been for my modifications: pistons, rods, bearings, axles, wavetrac lsd... eventually kpro, hyper single... etc...

these are all things i would have purchased if i had decided to keep my h22a but now i will have a 250-270 whp n/a set up with a 6 speed so i am glad i am going the route i am going. plus for the originality factor as stated above. there is no denying that the kseries motors are far more advanced and far more capable then older h and b series motors. yes the swap may cost a little more in the end but what you end up getting is definitely worth it"

for those who havent seen my build thread on the various sites i have it on... i am in the middle of tucking/shaving the bay and doing a k20/k24 swap.

this isnt like the number of other threads that ive seen on here and other sites.. this swap is happening.

i figured i would post on here in case i ran into issues. maybe someone will be able to help me out with questions, concerns, and trouble shooting along the way.

this is also going to be up to help anyone that plan on performing a kswap on their ludes in the future.

so i bought a k24a4 long block from a 2006 accord, a k20a2 complete head from a rsx type s, and a tsx 6speed tranny.






then comes the goodies.
wiseco 12.5:1 comp pistons, blueprint ibeam rods, acl main/rod/thrust bearings


hasport kswap mounts and axles.


wavetrac lsd.


new bearings, new seals and the lsd installed:


the motor was taken apart, cleaned, taped off and painted with seymour alumablast to give it an oem cast aluminum look.
before:






after:






the bay:
out with the old... i took the h22a out


motors out..


mostly everything else was removed, cleaned a bit, and the seam sealer had been removed.



now some things that i have discovered along the route to a kswap in a prelude...
#1 you have to use a k24 block..
#2 you can only use a tsx 6 speed or an accord 5 speed
#3 you have to have a crv k24 engine mount at lower bolt. (i will take a picture of this later, and i can get part numbers for you if needed. hasport also has this listed on their instructions and you can order it from them)
#4 in order to run A/C and power steering you have to use an aftermarket traction bar (the only one worth mentioning that i know of is an ESP bar.)
#5 custom fuel lines, power steering lines, and a/c lines will have to be made to run any of these (fuel is obviously necessary)
#6 hasport is the only company that i have heard of that makes a mount kit for this swap.
#7 in order to use the hasport mount kit the left mount in the bay needs to be removed. a new mount will need to be welded into place. (i will be doing this soon and will include pics)

_zac

SlimBB4

a concern i recently thought of...
i have a 5 lug conversion on my prelude from a 5th gen.
the axles i purchased are for a 4th gen prelude swap (hasport doesnt offer a kit for the 5th gen).
are there any differences between 4th and 5th gen axles????
_zac

miamijdmcoupe524

The axles i believe are the same. Good lucl with the swap.

Acidcrakker

Man I have to be honest, if there is really one person on this fourm who is known about this, its none other than Pirate Mcfred. Or whatever his name is.

serjey15

Yoy had a h22 in there??? You could have saved all your money from the swap and just built the h22 and turboed it and had a nice 300whp+

Acidcrakker

Originality gets a plus 100

SlimBB4

i hope you are right. i would hate to have spent that money on these axles and they wont work. i didnt even think about me having the 5th gen spindles when i ordered the parts.

i hope he chimes in then... lol

yes i had a freshly rebuilt jdm h22a with an m2b4 tranny. but to be honest... i sold my h22a, m2b4 tranny, innovative mounts, type s intake w k&n filter, chipped p28, for more then what i spent on the complete k20/k24 swap. so my additional spending has only been for my modifications: pistons, rods, bearings, axles, wavetrac lsd... eventually kpro, hyper single... etc...

these are all things i would have purchased if i had decided to keep my h22a but now i will have a 250-270 whp n/a set up with a 6 speed so i am glad i am going the route i am going. plus for the originality factor as stated above.


thanks everyone
_zac

miamijdmcoupe524

Why cant you use a rsx type s tranny?

miamijdmcoupe524

Also do you have a price list for the complete swap minus the upgrades? As if you were to buy the motor and tranny and install it?

HaZed1

been following you on TR... It's coming along nicely! BTW... Im the new owner of the lude with your tranny!

SlimBB4

the k20a2 rsx tranny has different mount points and it doesnt work with the hasport mount kit. from what i understand hasport couldnt find a feasible way to make the mount kit work with the k20 transmissions.

i dont really like labeling my expenditures but it would benefit this thread and help people out when looking into this swap.

-complete k24a4 longblock (purchased locally and came with cut wiring harness and under 40K): $400
-complete k20a2 head (purchased off honda-tech classifieds): $650 shipped
-k24a4 tsx 6speed tranny (purchased from a member of tamparacing.com): $1000 shipped
-hasport mount kit: $500-550
-hasport axles: $150-200 (i cant remember the exact price i paid)
-then you have to figure cost for belts, gaskets, honda bond, new water pump, fuel lines, wiring, kpro and a header.



as of right now, according to hasport, the kswap dc sports header fits/clears everything on a prelude. i am hoping to get a header that performs better and have it modified if necessary.

kpro is probably the best option but for temporary solution you should be able to run a tsx ecu or an rsx type s ecu.

i am having my wiring done by xavier with wireworx. he is local and produces products comparable to rywire and chase bays. even with the wiring being done you will still probably need to purchase a universal jumper harness like the one hybrid racing sells ($300-400 range i think).

if you are planning on doing the swap just swapping a lower end k24 out of an accord or crv will not show the gains desired. there are 2 different types of vtec offered with the kseries motors. the best flowing and performing heads with the vtec we are used to comes on the k24a2 head from the tsx of the k20a2 head from the rsx type s. also with the k24 blocks from the accord and crv have lower compression so wouldnt be as ideal for an n/a application (which is why i am building my block up a bit). ALSO! the k20a2 offers a much better performing oil pump. the other k24 and k20 motors have a very large oil pump with balance shafts. the k20 oil pump is lighter, smaller and out performs all the others. it is recommended to replace this. (i have purchased a brand new k20a2 oil pump as well from Dale at k20tuned)





the reason i decided to go with the mods that i have chosen is because i have seen the dyno sheets from a tuned k24/k20 swap with the same exact set up i will be running and he pulled 276whp and 222tq.

thanks,
_zac

SlimBB4

nice! thank you! did you purchase it from the guy who bought the tranny from me? werent you selling it or did you buy it from the second owner?
_zac

miamijdmcoupe524

Well good luck man! I already bookmarked this so i can follow it.

miamijdmcoupe524

Lookup racelab down here in miami. They do awesome work for the exhaust manifold.

SlimBB4

thanks, i will definitely look into them when the time comes for that to be fabbed up. i figure that if a dc header for the teg/civic kswap will work then most of the other kswap headers should work with little to no modification...
_zac

triumph_013

sub'd

godslayer

Just like every other Honda out there? Keep on truckin'! >(


Very cool. I'm subbing just to watch the progress. My 5th gen is a daily driver and doesn't get raced around except for spirited driving out in the country. I have 2 plans for my Prelude:

Plan 1) When the engine blows up I will spend the money to build it bigger and stronger. All motor would be nice but I have a soft spot for a JRSC.
Plan 2) When the transmission blows up I will spend the money to make it tougher and provide more traction.

Unfortunately, or maybe fortunately, my tranny just went with less than 97,000 miles on her so I did man up and dropped in a Synchrotech HLSD on the rebuild. No regrets so far....I'm loving it.

Hopefully I get a ***few*** thousand more miles on the engine before anything major happens and am forced to upgrade on account of Plan 1.

Threads like this are great because it's proving that there's yet another option to make the Prelude a little faster and a little more modern without having to put in a 15+ year old engine back in the bay.

Keep it up! Just don't go cutting your stock springs :p

SlimBB4

glad to hear it

haha i like your way of thinking sir. it was between supercharging or n/a for me as well. i decided n/a for various reasons. there is a guy doing a kswap in miami to his 5th gen prelude right now. i dont know what his progress is though.

sounds like you are doing things right with your prelude as well.

oh and i have jic fla-1 coilovers, chassis tech uca's, spc rear camberkit, megan toe arms, 5 lug conversion, ss lines, hawk pads no cut springs for me lol
_zac

HaZed1

Nah... Im the 2nd now. I bought it off Izzy who couldn't fit his baby seat in the back of the lude! lol....

triumph_013

one of the main reasons im thinking of a k swap is for a rotrex supercharger haha

in one of my CAD classes i was actually wanting to design a bracket that would allow the rotrex supercharger to work with a CCW rotating engine (H, B, D, etc)...that project never got underway though

SlimBB4

i thought you were selling it?? glad you decided to hold onto it!

that would be awesome. sucks you didnt complete your original goal.
_zac

codyh

Wow zac this is sweet and a huge help to youngings like myself. And to any other people wanting to do this. Lol but im happy you explained what it would cost for me in the texting mess we were in! haha Because when you explained expenses it really put the whole swap in perspective for me. lol.

You are certainly on your way to Big Mike status. And kind of a "hero", if you will, in the prelude scene. A RHD k swap all motor 4th gen lude? WHAT???

HaZed1

he did sell it...I bought it off Izzy, who bought it off Camelian. (TR U.N.) Im gna stop thread jacking your thread now!

SlimBB4

damn man, thanks (means a lot)! and im glad i can help. hopefully as the thread progresses it will be more and more helpful.

oh ok... got mixed up a bit sorry. dont worry about the thread jacking thing. you should make an account on squadronone.net and post an intro
_zac

codyh

And hey, maybe if you ever have to replace a quarter panel I can be somewhat helpful! lol