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Hello,

Im looking at doing a K24 VTEC Into my car. K24 Block with a K20A Head off a RSX Type S... A few questions to ask though. Which block should I use? The block from a CRV or a TSX and which engine code is that...

Also, the head off the RSX Type S is a K20A2 correct?

Is this reliable or should I just go with the complete K20A2 Swap... Another thing, what all do I need to do to mate the block with the head? Is there any changes that need to be done like the LS/VTEC in some civics? Please post all information or links you have on this one thread. Thank you.
 

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not much info to ad, but i thought.....why not?

i know the k24 rods are weaker.
ALL k series heads and blocks are interchangable. i dont know if you need to run a seperate oil line to the head when using a k24 vtec.
and of course the powerband will not be the same as a k20

there are kits out there, so ive heard.

overall i think the k20 will put out more HP per liter.....
 

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CRV k24a1 has 9.6CR
accord/element k24a4 has 9.7CR & EGR porting
TSX k24a2 has 10.6 CR i believe & is drive by wire (different TB & intake mani I believe) I also believe there is no K-pro for the TSX - but you could probably change the necessary parts to RSX-S (k20a2) parts

see here for http://www.sportcompactcarweb.com/tech/0406scc_hybrid/ for info on k24/k20 hybrid -If you want the water/oil cooler you will need to do some machining on the K24 block. Unless of course you have the TSX block

pistons speeds in a k24 can get a bit crazy about 7000-7500 rpm...something to be aware of

to be honest this k20/k24 frankensetin route has not been explored fully & I have yet to see HP & TQ (thats right i said TQ) #'s exceed those of a tune k20a/k20a2 (I have seen them lay down 155-160 lb/ft or torque at the wheels

I think skunk2 may have gotten around 170 lb/ft but i know that motor is no longer in existance (it blew up :oops: )
 

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to be honest this k20/k24 frankensetin route has not been explored fully & I have yet to see HP & TQ (thats right i said TQ) #'s exceed those of a tune k20a/k20a2
Yeah, but keep in mind that we all once said the same thing about the B20's. Some months ago I recall Full Race saying that had some K24 somewhere in the 500-600's (when they were leasing prototype pics of their turbo kits for them) but man that was so long ago who knows what transpired since then. Me personally - I haven't seen a single k-series do anything I couldn't see fro ma b-series with thousands less into it. But that's just me.
 

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adirondackR said:
to be honest this k20/k24 frankensetin route has not been explored fully & I have yet to see HP & TQ (thats right i said TQ) #'s exceed those of a tune k20a/k20a2 (I have seen them lay down 155-160 lb/ft or torque at the wheels
The torque is slightly higher and occurs at a much lower rpm which makes it much more streetable combination.

We should have a built K24 frank ready by November to test and brag about. It has all stock Honda parts in the bottom end but is a little more trick on top end. I estimate 260-275 at the wheels at a much more streetable rpm than a NA K20.

brian g
 

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brian g said:
adirondackR said:
to be honest this k20/k24 frankensetin route has not been explored fully & I have yet to see HP & TQ (thats right i said TQ) #'s exceed those of a tune k20a/k20a2 (I have seen them lay down 155-160 lb/ft or torque at the wheels
The torque is slightly higher and occurs at a much lower rpm which makes it much more streetable combination.

We should have a built K24 frank ready by November to test and brag about. It has all stock Honda parts in the bottom end but is a little more trick on top end. I estimate 260-275 at the wheels at a much more streetable rpm than a NA K20.

brian g
Sounds good so far, pertaining to the streetability and so on, but I acn't honestly say that I mod my car for streetability. Especially not for more torque. Last thing I need is more wheelspin. But this sounds like the ideal set-up for the heavier new-gen H/A's though. I'm not really an NA guy, so I'll be snoozing on any results till I see something with some PSI into it.
 

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doomsday said:
Sounds good so far, pertaining to the streetability and so on, but I acn't honestly say that I mod my car for streetability. Especially not for more torque. Last thing I need is more wheelspin. But this sounds like the ideal set-up for the heavier new-gen H/A's though. I'm not really an NA guy, so I'll be snoozing on any results till I see something with some PSI into it.
We ran a stock CRV block with RSX head and JR supercharger for Civic Si with about 9-10 lbs of boost and were at 310 whp. This is the engine we had in the 95 Integra we won the Sport Compact Car/Super Street Time Attack Challenge FWD Unlimited Class. During the event, it was detuned to 275hp.

And just for the sake of argument, almost any boosted K-series is gonna give you more wheelspin than a NA K24.

brian g
 

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brian g said:
doomsday said:
Sounds good so far, pertaining to the streetability and so on, but I acn't honestly say that I mod my car for streetability. Especially not for more torque. Last thing I need is more wheelspin. But this sounds like the ideal set-up for the heavier new-gen H/A's though. I'm not really an NA guy, so I'll be snoozing on any results till I see something with some PSI into it.
We ran a stock CRV block with RSX head and JR supercharger for Civic Si with about 9-10 lbs of boost and were at 310 whp. This is the engine we had in the 95 Integra we won the Sport Compact Car/Super Street Time Attack Challenge FWD Unlimited Class. During the event, it was detuned to 275hp.

And just for the sake of argument, almost any boosted K-series is gonna give you more wheelspin than a NA K24.

brian g

The numbers aren't bad. What octane was this on?
 

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yaya said:
not much info to ad, but i thought.....why not?

i know the k24 rods are weaker.
ALL k series heads and blocks are interchangable. i dont know if you need to run a seperate oil line to the head when using a k24 vtec.
and of course the powerband will not be the same as a k20
Does anyone know if we would have to swap over the main caps, block girdle, windage tray, etc. for the k20/k24 like it is recommended to do off a gsr block in an lsvtec?

here's some useful info in this thread about the k20/k24 swap if some of you haven't seen it. http://www.honda-tech.com/zerothread?id=973080
 

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man i cant wait..im going K24 and goingto add the K20 head later...imso excited...
 

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nikos said:
No prob..

Thank you for registering and let me know if I can help you in any way.

nikos
Thanks Nikos, your kindness is really appreciated.

MI4K20 said:
man i cant wait..im going K24 and goingto add the K20 head later...imso excited...
You are not alone haha. I'm in the process to about sell off all my stuff from my lsvtec I was building.

The idea that I can still run pump gas on the k series, still have it pretty much stock and basically put down more power and way more torque then my lsvtec with ctr pistons/b16a head, upgraded valvetrain, etc. has basically sealed the deal for me.

Plus the fact that the motor will still have PLENTY of room for more gains is bad ass.
 

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hell yeah...

im thinking of going ahead and getting my pistons and rods now. since ill have the motor out of the car. are you thinking of building your motor..what set up are thinking about??
 

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as far as ppl saying it cant rev high. wasnt it like that for ls/vtec at first right. well u see ppl putting them up high in the rpm's with just the insurance of rod bolts. on H-T i read a guy saying that the rod/stroke ratio is really really close to that of a ls. so mated with the k20a2 head i wouldnt see a problem with bring it up to the k20's redline. but i would say give it a lil time for ppl to push it and found there weak points. oo and also for ppl not be impressed with the hp im guessing not to many changed pistons with there swap so its gotta be way lower then 11.1 or 11.5 of the k20a/a2 right. so there power levels are good i havent been impressed with there tq numbers. i also thought they would be higher then those of the k20a but havent seen it,
 

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MI4K20 said:
hell yeah...

im thinking of going ahead and getting my pistons and rods now. since ill have the motor out of the car. are you thinking of building your motor..what set up are thinking about??
Initially, just the stock k24 so I can at least get the motor in. I would definitely go the the k20a/a2 head with all the necessary upgrades to the bottom end shortly after. i.e k20a2 oil pump asembly, k20a2 windage tray, oil cooler, k20a2 waterpump.
Pistons probably not right away, at least I haven't really thought much about it yet.

Stock k24vtec with I/H/E and a kpro is what I would realistically shoot for.
 
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