So, I've been reading around about the differences between the jdm type r and our usdm si. they have the k20a and we got the k20z3. I've read about both, but I want to put all the differences together. How the heck is the jdm able to push 220hp while we cannot even get 200 out of ours. is it more engine internals? I guess I want to put all the differences together in this thread.. One thing I really wonder about is the intake manifold. I hear the JDM uses a RRC while we use a RBC. If we were able to get our hands on one would we be able to fit into our engines?

thanks.

 

Well grasshopper....


Basically they have tuning solutions and we dont. If the z3 had Kpro or the so called Ipro which is supposed to be out in about a year. The z3 will be able to push alot more HP then they can now.


Modified by 100miles+ at 12:57 PM 5/21/2008

 

Oh and the reflash is not like the kpro if you were gonna ask.

 

stock for stock.

the reason being that the k20a has 220 and we have 197 with our z3.

is because. of. and i will only say this ONCE.

EMISSIONS.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by i-VTEC_DOHC &raquo;</TD></TR><TR><TD CLASS="quote">stock for stock.

the reason being that the k20a has 220 and we have 197 with our z3.

is because. of. and i will only say this ONCE.

EMISSIONS.</TD></TR></TABLE>

ABSOLUTELY CORRECT!

The stock intake manifold on the K20z3 is amazing. The only benefit of changing it out would be if you were switching to cable throttle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2008fijibluesi &raquo;</TD></TR><TR><TD CLASS="quote">

ABSOLUTELY CORRECT!

The stock intake manifold on the K20z3 is amazing. The only benefit of changing it out would be if you were switching to cable throttle.</TD></TR></TABLE>

higer compression , we dont have 100 octane here too and in japan they do

 

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

higer compression</TD></TR></TABLE>

11.5:1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EK FLY &raquo;</TD></TR><TR><TD CLASS="quote"> we dont have 100 octane here too and in japan they do </TD></TR></TABLE>

we got it just not readily available

 

damnnnn. i guess, i never understood there were so many differences. I always thought that since it was a k20 the parts would have been easily adapted to all the k20 engines. as for the lack of tuning options that makes sense, as well as emissions.

 

the k20z3 also has balance shafts

 

k20a has no balence shafts, bettter oil pan, slightly diffrent block, oil squiters, better cams, better exhuast mnifold. drive by wire, shorter gearing, slightly diff head

k20z3 - has a better intake manifold, same casting head as k20a2's. little longer gearing diff vss, smaller tb, less tuning options, balence shafts, diff oil pump and oil pan whoch sucks power ,

not much different as in the z3 can be modded but tuning options kill ou guys

 

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

11.5:1

we got it just not readily available

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

higer compression , we dont have 100 octane here too and in japan they do </TD></TR></TABLE>


hmmm the gas station literally within a rocks throw from my house has up to 106octane if i remember correctly readily avail in barrels inside the garage... stuffs hella expensive tho

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by i drive a honda &raquo;</TD></TR><TR><TD CLASS="quote">k20a has no balence shafts, bettter oil pan, slightly diffrent block, oil squiters, better cams, better exhuast mnifold. drive by wire, shorter gearing, slightly diff head

k20z3 - has a better intake manifold, same casting head as k20a2's. little longer gearing diff vss, smaller tb, less tuning options, balence shafts, diff oil pump and oil pan whoch sucks power ,

not much different as in the z3 can be modded but tuning options kill ou guys </TD></TR></TABLE>

can u be more specific on this please.

 

Isn't the porting on the heads different? Not sure that that's a huge deal but if we want to get down to the brass tacks of it.

http://babelfish.yahoo.com/tra...slate

Keep an open mind when you read babelfish.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by draken187 &raquo;</TD></TR><TR><TD CLASS="quote">


hmmm the gas station literally within a rocks throw from my house has up to 106octane if i remember correctly readily avail in barrels inside the garage... stuffs hella expensive tho</TD></TR></TABLE>

yah close to you maybe. but not at every gas station. readily available means pretty much at every station out there like 86, 89, 91 and 93 is.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by i-VTEC_DOHC &raquo;</TD></TR><TR><TD CLASS="quote">can u be more specific on this please.</TD></TR></TABLE>

meant cable*

k20z3 = drive by wire

 

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

meant cable*

k20z3 = drive by wire </TD></TR></TABLE>

thanks =]

i was hoping you were gonna catch your mistake.

now if u were talking about the k20z4, i would say that you are correct.

 

What design flaw does the Z3 pan have that makes it "rob power" when compared to the K20A pan?

 

internals. and it needs usdm im and em.

 

Anything more specific than that? ie: baffling, pick-up location, ect.. ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JustDSM &raquo;</TD></TR><TR><TD CLASS="quote">Anything more specific than that? ie: baffling, pick-up location, ect.. ?</TD></TR></TABLE>

k20a = no baffle

pick up location is pretty much more or less in the center

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JustDSM &raquo;</TD></TR><TR><TD CLASS="quote">What design flaw does the Z3 pan have that makes it "rob power" when compared to the K20A pan?</TD></TR></TABLE>

not the pan............the pump...........it has balence shafts.

 

Thanks for the info. Would the oil pump work HyTech does also be applicable to the Z3? I remember reading something about the work they do to the pump (mild porting of the housing, and treatment of the pump gearing) along with a baffle to prevent oil starvation in high "g" sceneros.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EK FLY &raquo;</TD></TR><TR><TD CLASS="quote">
we dont have 100 octane here too and in japan they do </TD></TR></TABLE>

You dont know too much about the fuel rating system used around the world do you?

Their 100 is equivalent to our 93/94

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by i drive a honda &raquo;</TD></TR><TR><TD CLASS="quote">k20a has no balence shafts, bettter oil pan, slightly diffrent block, oil squiters, better cams, better exhuast mnifold. drive by wire, shorter gearing, slightly diff head

k20z3 - has a better intake manifold, same casting head as k20a2's. little longer gearing diff vss, smaller tb, less tuning options, balence shafts, diff oil pump and oil pan whoch sucks power ,

not much different as in the z3 can be modded but tuning options kill ou guys </TD></TR></TABLE>

WoW, you have to love all the erroneous information being perpetuated on this site.

The K20Z3 Cylinder head is the same casting as the K24A2, it's identical.

The gearing difference that I know of between the latest Civic Type R and the Civic Si is the 5.06 final drive.

You said the K20Z3 has a better intake manifold, better than what? Perhaps better than the exiting EP3R and DC5R. There hasn't been head to head testing of the manifolds between the FD2 and the FA5/FG2.

The K20Z3 doesn't have oil squirters? Breaking news to me.

The K20A has a slightly different block? Which K20A are you referring to, and how is it different?


Modified by Kidnkorner at 7:33 PM 5/26/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kidnkorner &raquo;</TD></TR><TR><TD CLASS="quote">
WoW, you have to love all the erroneous information being perpetuated on this site.

The K20Z3 Cylinder head is the same casting as the K24A2, it's identical.

The gearing difference that I know of between the latest Civic Type R and the Civic Si is the 5.06 final drive.

You said the K20Z3 has a better intake manifold, better than what? Perhaps better than the exiting EP3R and DC5R. There hasn't been head to head testing of the manifolds between the FD2 and the FA5/FG2.

The K20Z3 doesn't have oil squirters? Breaking news to me.

The K20A has a slightly different block? Which K20A are you referring to, and how is it different?

Modified by Kidnkorner at 7:33 PM 5/26/2008</TD></TR></TABLE>

x2 that guy is an idiot and is pulling info out of his ***

"i drive a honduh" guy dont go posting erroneous info if you your self have no clue.

the dc5 k20a is a result of a vast arsenal of specially formulated factory parts from honda (also seen in their previous R engines, i.e. b18cR and the NSX-R engine), specific for that engine.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by i drive a honda &raquo;</TD></TR><TR><TD CLASS="quote">k20a has no balence shafts, bettter oil pan, slightly diffrent block, oil squiters, better cams, better exhuast mnifold. drive by wire, shorter gearing, slightly diff head

k20z3 - has a better intake manifold, same casting head as k20a2's. little longer gearing diff vss, smaller tb, less tuning options, balence shafts, diff oil pump and oil pan whoch sucks power ,

not much different as in the z3 can be modded but tuning options kill ou guys </TD></TR></TABLE>

some of the main difference between the R k20 and the us counterparts found in the Rsx's and si includes:

different intake manifold with velocity stacks in it
is NOT drive by wire (uses a throttle cable throttle body)
OIL PAN is the same, no girdles or anything special in it
BLOCK is the SAME (except for the k20a stamp if you consider that a difference)
high compression pistions
lightened rods
lightened crank shaft
upgraded valve train (springs, valves, etc.)
cams
modfied head ports (i.e. special porting on head)
better exhaust manifold design

special transmission to match the engine (i.e cam profile, powerband)
dc5R has a 6 speed manual transmission
helical LSD
oil girdles inside tranny to prevent fluid starvation during spirited driving
4.79 FD in the dc5R
5.06 FD in the new FD2R

there are other details im sure i left out but that should be the bulk of things.

check it out for your self

http://www.k20a.org/forum/showthread.php?t=27766

http://www.honda.co.jp/CIVICTYPE-R/technology/

 

damn you just killed it!!!!