Im new into the game as you can tell by my user handle. I wanted to learn from some experienced members what all is involved in a GSR swap into a 5th gen prelude. And the same question for the K20a2 into the same vehicle. Also, i would really appreciate your opinion on which seems like a better swap. Im not completely worried about being all new and original. I just know roughly what i would like the finished product to be. The more detail the better. Im always looking to gather more information.
Thanks guys

 

why would u want to down grade to a b-series??

 

This is why i decided to ask some more questions. I understand that the B-series engines are great engines and the GSR and Type R are great swaps. And from what i heard, the H22 are heavier than the B-series motors. I was thinking more about power to weight and price when i considered the GSR

 

imo preludes are too heavy for a gsr motor, and h22s only weight about 50 lbs more then a b18 anyway. and a k20 swap wouldn't really be worth the money. the h22 is a good motor you should just keep that

 

I know that all the B-series cams are interchangable but what mods are available for the internals on the H-series? Would you have to purchase aftermarket cams if you wanted to see any improvement from that?

 

usdm b18c1- 170 hp @ 7600 rpm
128 lbs-ft @ 6200 rpm

usdm h22a1- 187 hp @ 6800 rpm
158 lbs-ft @ 5500rpm

 

not all b-series cams r interchangable there are vtec motors and non vtec motors those r not u cannot interchange those along with all honda motors

 

Dont do it man H22's are the freaking Shiz! If you want to engine swap go with a JDM H22 my boy told me that those things pull like freaking BEASTS!!!! Yeah K20's are good but they are expensive as hell you looking at about 10G's while the JDM H22 is aroung 5G's. So peep the advice and go with whatever you feel is the good choice.

 

spending five grand for an h22a would be dumb

 

wow thats the dumbest thing i have ever heard.... if i didnt want to go h i would go F like a f2Ob that would be tight but gsr's and k's are not gonna push are boats lol you need some power and cheap power at that...but.... i have yet to see a B in a lude that would trip me out to see that a K.... not to much...

 

do more research. the b series are like 35lbs heavier than the h22, and that's w/ the tranny.

 

if you want to do a swap go for dohc h23vtec the blue top
u get more torque from these engines. or go h22 type s which is a jdm red-top prelude engine

 

prelude should be more balanced wid a k20a or b16a

but u gonna damage the engine quicker cause u have to pressure the engine more to move that fat body

 

Both of those engines will make the car slower, especially the B16, if you want something different than an H22 then do the H23a blue top like mentioned above.

 

def agree h23a

 

wow b-rad G, you took me back to the mallabooteh album!

anyways "5K" for a jdm h22 is a bit steep, even with the tranny.

realistically your lookin at 3k with the trans and getting the motor in the car. shop around you wont be disappointed, and also just to clarify the h22a (jdm) claims 220 at the crank and the udsm claims 190 (hp that is)

 

From looking at you screen name I'm under the assumption that you have a 91 prelude so first there is no mount kit for the 3rd gen to accept any b series engine other then the prelude b series. Second the only k series mounts available for any prelude are only for the 4th gen and ever so you have to figured out you are going to wire it up. Third they make h22 swap mounts for the 3rd gen so why go with a smaller engine there is a saying that there is no replacement for displacement so go with the bigger motor that is the h22. 4th K series engines are expensive and impractical when you can have a h22 with a turbo kit for the same price of having just a regular k series with no mods in your car.

 

op said he has a 5th gen

 

^ if thats the case just keep the h22 you can do an all motor build, turbo it, or slap jackson racing supercharger and call it a day. There is no way in hell a b18 can carry are heavy ludes around and why downsize into a k20a2 if you where to go k series at least do a k24 swap but then that would be super expensive and impractical so just stick with the h22

 

If your engine savy or have friends that know how to build motors I say go with a g23 its a hyprid between the an f series short block with a h22 head when built right there a third of the price of a k series and with much more power some where around 240hp with a good head and stock internals. theres lots of info and blogs for those. just a suggestion lots of work but worth it.

 

thanks everybody for the tips. just like to say the "91" in my name is the year i was born. not the year of the lude. second, i just wanted to mention that im very inexperienced and stuff i say might seem impractical and plain stupid, then thats because it is. all the info you guys are giving me is very helpful. i work at a honda dealership fresh out of a vo-tech program so im just a noob. i talked to one of the smartest honda guys i know and he explained to me how impractical a b-series swap is and why. from what ive learned and read, next to swappin for an h23, buildin the h22 is probably the best idea. one reason i was leanin towards the k20 is for the six speed tranny. i didnt think there were any that bolt up to the h22.

any input?

 

Might be time to stop drinking that drain cleaner and visit a neurologist

IMO a K24 is a good candidate for a Prelude, but a B-series is a bad idea and a K20 isn't much better, though it has potential.

 

These are all reasons i hate honda-tech. If you dont know what you're talking about, STFU.

No 6sp will match to the h22. You have a 5th gen, you have an h22, no need for a swap at all. Just cause it's a honda, does not mean it needs to have a super awesome rare jdm motor swapped it. Learn your motor, learn its weak points, decide what you want, decide you budget, learn from there. please.

 

WHY USE SUCH A HEAVY CAR TRY A HATCH OR A REX WOULD BE WAY FASTER. K- SERIES NEEDS SOME $$$$$$ IF TRYING TO KEEP IT CHEAPER GO B-SERIES MORE OPTION FOR INTERTCHANGEABLE PARTS

 

Stay with the H22 in the 5th gen prelude