K20a3 w/K24 HEAD [Archive] - K-Series Forums

: K20a3 w/K24 HEAD



xtune50
03-30-2005, 09:01 AM
I was just wandering if anyone knows what kind of gains if any you could get if you put a K24 head on a K20A3 bottom end. What ecu would you use, compression ratio? Does the K24 head flow better than a K20? head. I am going to be forced induction. Please help

EvaUnit01
03-30-2005, 01:54 PM
This should be posted in the swaps area...moving for ya!

EvaUnit01
03-30-2005, 02:00 PM
and now to answer your question...there are many different types of headswaps out there and this is not one of them and wont benefit you anyway. The reason is depending on the type of k24 head you are using, you will see the same or possibly even lower gains. Here are the best swaps to go with:

Full Type S engine swap
K24 bottom end with Type S head
K24 (TSX) swap

If you are going FI you could choose any of these, with the k24 swaps...you would have to get a custom kit. BUT...with the Full Type S swap you have the option of doing a custom kit or getting a pre-fabricated kit (IE:Cybernation, Revhard, Greddy, SFP, Full Race, Comptech SC, Jackson Racing SC)

k20ImportTuner
03-30-2005, 03:10 PM
or you could SC the k24 which is a kit that fits in the Si.

k24a2 is your cheapest and best bet, being sold at $2,000 in the K-Series merchandise.

I believe i read the k24 and k20a3 and/or a2 heads are pretty much the same? if not then VERY close...?

xtune50
03-30-2005, 03:35 PM
I already have a turbo kit that I pieced together. I am using a T04E stage IV turbo with type RFL BOV, tial 38mm W/G, FMIC, RC 550's, STR fuel rail, OBX header, manual boost control, and Greddy E-manage w/ all the harnesses. I just haven't put it on yet; I want to do everything at the same time. I am going to order Darton sleeves, and some forged pistons and rods on the 1st so all I am trying to figure out is what head to go with. Thanks for the help any more info or suggestions would be greatly appreciated

k20ImportTuner
03-30-2005, 04:05 PM
haha WHAT? You are going to use a stage IV prepped turbo on a k20a3?
Sounds like you're insane.
Get a k20a2.

the k20a3's bottom end will give out easily if you boost too much, which isn't that much.. that's endangered your custom pieced turbo... you get somethin nice and big flyin around you never know..

xtune50
03-30-2005, 04:09 PM
What do I need to strengthen the bottom end of the a3? I was really wanting to use the a3.

k20ImportTuner
03-30-2005, 04:46 PM
well the k20a2 has a strong bottom end and that's why if people are going stage II or higher(higher I havent seen yet), they'd swap. a2 has a balanced crank, oil squirters, and a few more I think? I dont know too much about it.

02SilverSiHB has already blew his k20a3 from boosting too high, it was at somewhere above 300 whp, maybe 330? i dont remember but a rod or two snapped and there was a good enough amount of damage.
You'd have to be crazy to use the turbo a stage IV turbo uses and expect to boost close to what a stage IV turbo can do.
k20a2+ pistons/rods would be a good start. other goodies could be added later

xtune50
03-30-2005, 05:30 PM
What if I just went with a K20A2? I ask because I can get Everything needed for the swap for $1300 from a guy here in town. Would it be able to handle it.

k20ImportTuner
03-30-2005, 05:48 PM
Yeah it would, well every engine holds a certain amount of boost and pressure below it starts getting dangerous, so just get the k20a2 put on your kit and boost fair, and get that shit dyno tuned.

xtune50
03-30-2005, 06:13 PM
sorry my mistake I meant the K24A2. damn, I just can't seem to type anymore

k20ImportTuner
03-30-2005, 06:29 PM
oh, haha no prob. That would be just as strong but you'd have A LOT more torque. That thing would be crazy. and you would probably have to change your piping a little to conform with a little different shaped motor than the k20s. They have a little bit of a difference in layout.
and the k24a2 would boost a little better with a lower compression ratio.
and cost less to begin with.

xtune50
03-30-2005, 06:41 PM
Awesome, K24 it will be. Should I leave the stock k24 head or try and find a K20A2 or K20A head? Thanks for all the help

k20ImportTuner
03-30-2005, 06:53 PM
stock k24a2 head will do fine.
Anytime. :)

EvaUnit01
03-31-2005, 06:54 AM
that actually reminds me too...if I can find the number there is already a company who did a very good TSX turbo kit. You may want to ask them for any pointers. But me personally...i'd slap a supercharger on that bad boy.

revtune
03-31-2005, 01:03 PM
I believe i read the k24 and k20a3 and/or a2 heads are pretty much the same? if not then VERY close...?

Depends on the car. K20A2 and A3 heads are nothing alike. Same with the K24. I believe the K24A is used in the TSX which has a head similar to the Type-S, and the K24A2's (correct me if my numbers are off) which is used in the Acorns and CRVs is like the EP3's.

The K20A2 head is a true VTEC head, meaning that both cams are used. Where as the K20A3 found in the Civic is econo style. Only the exhaust cam is VTEC. Plus, the A2 kicks in around 5 grand or so, and the A3 kicks in around 2 or 3 grand.

I hope all this made sense...

And, from what I know, the K20A3 is better for turbocharging... I think...

EvaUnit01
03-31-2005, 01:25 PM
The k24A1 is the TSX engine...and I believe after that it's not really worth it. Well...because of the lower compression of the a3...boost is safer up to a certain point. Each engine has it's weak point. BUT if you can lower the comrpession on a Type S engine you can increase your boost which of course as we all know means more power.

k20ImportTuner
03-31-2005, 02:01 PM
k24a2 is TSX
k24a3 is Acorn
k24a1 is CRV


And, from what I know, the K20A3 is better for turbocharging... I think...
Over what?

EvaUnit01
03-31-2005, 03:06 PM
Thought it was the k24a1 for the TSX...meh...oh well. And in my post...safer should be safe. A Type S engine will be better for boost over a base engine. Oil cooler, oil squirters, stronger rods, pistons, crank and valvetrain.

meno19
04-11-2005, 05:38 PM
Depends on the car. K20A2 and A3 heads are nothing alike. Same with the K24. I believe the K24A is used in the TSX which has a head similar to the Type-S, and the K24A2's (correct me if my numbers are off) which is used in the Acorns and CRVs is like the EP3's.

The K20A2 head is a true VTEC head, meaning that both cams are used. Where as the K20A3 found in the Civic is econo style. Only the exhaust cam is VTEC. Plus, the A2 kicks in around 5 grand or so, and the A3 kicks in around 2 or 3 grand.

I hope all this made sense...

And, from what I know, the K20A3 is better for turbocharging... I think...

Okay if the Ka20A3 is vtech only on the exhaust cam what does the whoile I vtec mean?

k20ImportTuner
04-11-2005, 05:45 PM
Okay if the Ka20A3 is vtech only on the exhaust cam what does the whoile I vtec mean?
http://www.superhonda.com/forum/showthread.php?s=&postid=1005867#post1 005867

meno19
04-11-2005, 06:23 PM
Nice definiton man, that is some sweet info. Everyday Im hearing more and new impresive things to be done to the KA20A3 that is worth the while/.

k20ImportTuner
04-11-2005, 07:13 PM
k20a3
not to be picky ;)
hah
but yeah that link was pretty helpful to me, too.

team3d
06-21-2005, 05:08 AM
Okay if the Ka20A3 is vtech only on the exhaust cam what does the whoile I vtec mean?
Intelligent VTEC

EM2typeflex
10-06-2005, 11:43 AM
not to get off topic, but I heard of a guy in cali who uses cr-v heads for a good all motor setup.