Hi we are currently planning on building a new engine and was told to use the k20a head. I see there is a k20a, k20a1, k20a2, k20a3. Are all of these the same casting or are each one different?

 

k20a JDM ITR motor and K20a2 are the same heads. Like B16's compared to the ITR motor head.

 

i heard the best flowing head were k20's from the 06-07 si's...correct me if im wrong

 

Wrong. Stock form they are all the same, meaning k20a2-k20a-k20z.

Only head thats a little off on flow are the TSX heads, as those were meant to give you a little more grunt in the midrange.

 

::shameless plug::

i have a K20AR head for sale

 

if your so positive they all flow the same, then why does everyone use type s heads when doing k swaps?

 

Because they are the most common and easiest to find. There are alot more type s's on the road then there are 06-07 Si's and itr's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20beast978 &raquo;</TD></TR><TR><TD CLASS="quote">if your so positive they all flow the same, then why does everyone use type s heads when doing k swaps?</TD></TR></TABLE>

Because people dont know.

Go on k20a.org. And learn my friend. We welcome all new comers!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Furyof4 &raquo;</TD></TR><TR><TD CLASS="quote">Because they are the most common and easiest to find. There are alot more type s's on the road then there are 06-07 Si's and itr's.</TD></TR></TABLE>

Believe it or not though, when SI heads first came out they were dirt cheap! as were their stock IM's RBC's going for $170!! I think a bare head was like 300 bucks! Brand new!

 

I remember that, now the best price I can find is $860. There manifolds are still cheap though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ipodhustle &raquo;</TD></TR><TR><TD CLASS="quote">::shameless plug::

i have a K20AR head for sale </TD></TR></TABLE>


shameless


pm'd

 

quick question...so if the heads are the same then what is teh stock bore of the tsx and type s blocks?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by team1320_k24eg &raquo;</TD></TR><TR><TD CLASS="quote">


shameless


pm'd </TD></TR></TABLE>

LMAO

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20beast978 &raquo;</TD></TR><TR><TD CLASS="quote">quick question...so if the heads are the same then what is teh stock bore of the tsx and type s blocks?</TD></TR></TABLE>

86mm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20beast978 &raquo;</TD></TR><TR><TD CLASS="quote">quick question...so if the heads are the same then what is teh stock bore of the tsx and type s blocks?</TD></TR></TABLE>

misinformed ...

heads are not all the same. the ITR/CTR, Type S, TSX and 06+ Si all have holders for LMA are are real iVTEC with middle lobe cams, etc.
the others are economy type motors.

the TSX and K20Z heads are the same castings, the older Type S heads were different.

the CRV (one of the econo motors) flows very well but don't have the true iVTEC to hold LMAs etc.

you can, however fit the True iVTEC rocker assembly in any of other econo heads by swappign around the rocker pins to keep one valve locked on vtec all the time so that the vtec rocker doesn't stay "loose" when in non VTEC.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">

misinformed ...

heads are not all the same. the ITR/CTR, Type S, TSX and 06+ Si all have holders for LMA are are real iVTEC with middle lobe cams, etc.
the others are economy type motors.

the TSX and K20Z heads are the same castings, the older Type S heads were different.

the CRV (one of the econo motors) flows very well but don't have the true iVTEC to hold LMAs etc.

you can, however fit the True iVTEC rocker assembly in any of other econo heads by swappign around the rocker pins to keep one valve locked on vtec all the time so that the vtec rocker doesn't stay "loose" when in non VTEC.</TD></TR></TABLE>

Well, now THAT i didnt know! I always assumed that the SI's were the same as Type S as it was 2liter, but now that i think about it i was wrong about that also on euro R heads, as those are TSX's also.

 

b20beast978 offered me 500 for my K20AR head. you think i should sell it

 

Just a little more info for you guys...the ports do not matter at all. This is a full race application and will be ported and moved around to the max. It will also be a sheet metal intake with a carburator. So flowing aside are they the same bare metal cast just with different portings?

 

Between the tsx and the Type S, yes, just remove some material from the tsx head, and you have a k20a2/k20a head. Also the difference is not that big at all comparing the two, i remember nikos said that tsx flowed like 278 and rsx like 290? I believe..



For those interested, theres more info on flow of heads of the k series family in here.
http://www.k20a.org/forum/show...age=3


Enjoy.

 

Thanks for the photo thats just what I needed!

 

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ipodhustle &raquo;</TD></TR><TR><TD CLASS="quote">b20beast978 offered me 500 for my K20AR head. you think i should sell it </TD></TR></TABLE>

i'll give you $505

 

You guys wouldnt happen to know the honda or acura part number for this thing would you? Maybe an exact car would do...02 rsx-s?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by team1320_k24eg &raquo;</TD></TR><TR><TD CLASS="quote">

i'll give you $505 </TD></TR></TABLE>

lmao, it costs like 20 bucks in gas to your place and back you hoe

 

so whats the reserve on the head...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ipodhustle &raquo;</TD></TR><TR><TD CLASS="quote">

lmao, it costs like 20 bucks in gas to your place and back you hoe </TD></TR></TABLE>


your such a drama *****... "give me the head and no one gets hurt..." (slaps ipodhustle) and


lets get back on topic fool... dont thread jack..