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View Full Version : JDM K20 vs AUSDM K20



gxiang
21-04-2008, 03:55 AM
hey guys, did a few searchs here n there and on k20a.org but i still wanted to ask you guys.

here is the deal. say i have dc5s A (jdm) and B(ausdm) both have the bolt on parts (I/H/E + Hondata tune by the same person)

power wise would i be expecting the same result or would the jdm be pumping out a lot more??

im just curious because both in stock form the jdm makes significantly more power, however is it the same after a tune and mods???

barefootbonzai
21-04-2008, 08:28 AM
Yes the JDM k20 will produce more power, it has better cams and pistons. You'll see around 10kwatw difference after the mods. for example 142kw vs 152kw - so it is quite a bit.

gxiang
21-04-2008, 08:37 AM
thanks barefoot for the early reply

how much power would you expect for sale a setup on jdm k20 with toda headers, respectable CAI like injen and a respectable catback 2.5". tuned by a decent tuner. I read most people with similar setup get around the 130-138kw mark on the ausdm setup?

T-onedc2
21-04-2008, 08:39 AM
so out of interest is it as simple as fitting these JDM parts and change ecu or what's involved?

Nepolian
21-04-2008, 08:49 AM
^ You get quality I/H/E fitted and usually about 1 week or so for your ecu Hondata modification and tuning. depending on where you are.

As barefoot said, there is about 10kw difference atw. However there is also a difference in the mid range where the JDM would also make more power, not just the overall peak.

barefootbonzai
21-04-2008, 10:21 AM
so out of interest is it as simple as fitting these JDM parts and change ecu or what's involved?

surely is, and you'll probably several thousand dollars poorer from switching the pistons and cams to it's JDM counter part which is not worth the hassle. The labor involved will cost twice as much as the parts. This is when you'll get after market cams and pistons and be even more in debt hahaha.

barefootbonzai
21-04-2008, 10:24 AM
thanks barefoot for the early reply

how much power would you expect for sale a setup on jdm k20 with toda headers, respectable CAI like injen and a respectable catback 2.5". tuned by a decent tuner. I read most people with similar setup get around the 130-138kw mark on the ausdm setup?

yeah that sounds about right. The only JDM setups i've seen are in swaps. They generally make 140kw+ with decent bolt on's and tune. And if you go hard out and get all the best bolt on's etc... you can expect 150ish kw

sendok
21-04-2008, 10:43 AM
i've seen a comparison on the track (video) somewhere in youtube. the JDM one act faster than the AUSDM / UKDM...

trism
21-04-2008, 01:45 PM
but are jdm k20's harder to come by than ausdm?

Mattski_VTIR
21-04-2008, 02:12 PM
Yes the JDM k20 will produce more power, it has better cams and pistons. You'll see around 10kwatw difference after the mods. for example 142kw vs 152kw - so it is quite a bit.

:thumbsup: I agree, The Aus Spec K20A2 v's JDM K20a (ITR spec) with same bolt ons and same tuner, dyno around 10kw more ATW. K20Z1 (ITS) Motor yield slightly better results then the Aus ITR Motor bolt on for bolt on!!

Nepolian
21-04-2008, 02:22 PM
but are jdm k20's harder to come by than ausdm?

Yes and about double the price too.!

Cheaper to use a ausdm if youre gonna be doing internal mods tho.!

thebob
21-04-2008, 03:06 PM
how much power would you expect for sale a setup on jdm k20 with toda headers, respectable CAI like injen and a respectable catback 2.5". tuned by a decent tuner. I read most people with similar setup get around the 130-138kw mark on the ausdm setup?

Are you putting this into a DC5 or EP3, because if you arent and its going into say ek / eg toda dont make headers for it. You will need something like R crew, ssr.

Nepolian
21-04-2008, 03:13 PM
^ Looks like he's got or looking to get a DC5 :>

90LAN
21-04-2008, 03:50 PM
Yes and about double the price too.!

Cheaper to use a ausdm if youre gonna be doing internal mods tho.!

depends who u know

bennjamin
21-04-2008, 06:22 PM
so we can pull from this ~

For a daily engine with only bolt on mods a JDM K20 is best.
For a modified engine ( cams/pistons etc) its best to start with the AUDM engine as the end result will be similar

7ypeR
21-04-2008, 06:42 PM
so we can pull from this ~

For a daily engine with only bolt on mods a JDM K20 is best.
For a modified engine ( cams/pistons etc) its best to start with the AUDM engine as the end result will be similar

Starting with an audm engine, you will automatically have a few grand extra in the pocket. So putting that money towards the internals WOULD be more beneficial.

Also if you were going to build, you wouldn't build with jdm internals, rather build with higher performance stuff. If not, just buy the jdm to start. It will be cheaper to do so in the first place.

One other thing to note is that jdm also have shorter final drive in the gbox so it accelerates quicker than the audm one.

EK4R
21-04-2008, 06:47 PM
i thought the gearbox was exactly the same. i guess not?

90LAN
21-04-2008, 07:00 PM
i thought the gearbox was exactly the same. i guess not?

also LSD

thebob
21-04-2008, 07:02 PM
jdm 4.9? audm 4.7?

EK4R
21-04-2008, 07:02 PM
also LSD

didnt the ausdm dc5 come with LSD?

sorry iam comparing this with a ausdm dc5r gearbox to a jdm dc5r gearbox

EG5
21-04-2008, 07:05 PM
jdm 4.9? audm 4.7?

AUDM dc5r gearbox is Y2M3
JDM dc5r gearbox is Y2M3

Exactly the same gearbox code , same final drive , same gear ratio

With DC5 Type S you can just simply run aftermarket LSD like Cusco etc.

thebob
21-04-2008, 07:07 PM
both 4.9?

xtercii
21-04-2008, 07:09 PM
does ep3 have the same gearbox as well?

thebob
21-04-2008, 07:10 PM
i cant imagine it wouldnt.

90LAN
21-04-2008, 07:11 PM
didnt the ausdm dc5 come with LSD?

sorry iam comparing this with a ausdm dc5r gearbox to a jdm dc5r gearbox

type s k20 no lsd

fatboyz39
21-04-2008, 07:17 PM
4.7 FD for JDM/AUDM k20 box. Think the new UK civic type R are a 5.1 FD but the gear ratio's are different.

7ypeR
21-04-2008, 07:21 PM
Jdm has 5.1 final drive, audm 4.7. You can tell when driving at 100kph in 6th gear, jdm will be at approx. 4500rpm and audm will be at 3500rpm give or take one or two hundred rpm. Ask anyone who has jdm k20, they will tell you that this is true.

thebob
21-04-2008, 07:23 PM
4.9 i believe, most aftermarket fds for K20 are 5.1.

fatboyz39
21-04-2008, 07:26 PM
4.9 i believe, most aftermarket fds for K20 are 5.1.

4.7 FD....there not 4.9. The new civic R from UK has a 5.1 FD from factory.

EG5
21-04-2008, 08:23 PM
Jdm has 5.1 final drive, audm 4.7. You can tell when driving at 100kph in 6th gear, jdm will be at approx. 4500rpm and audm will be at 3500rpm give or take one or two hundred rpm. Ask anyone who has jdm k20, they will tell you that this is true.


http://img.photobucket.com/albums/v504/MJ23FE/Tranny%20Gear%20Calculations/K-SeriesTransmissionTablev3-28-08re.jpg

NPR3 ( EP3 JDM gearbox ) and Y2M3 (JDM DC5R and AUDM DC5R gearbox) have exactly the same ratio. 4.7 Final Drive.

USDM K20A2 have different final drive ( 4.3 ) they also have different ratio from 4th , 5th and 6th gear .

7ypeR
21-04-2008, 10:37 PM
I stand corrected. Good info :thumbsup:

xtercii
21-04-2008, 11:36 PM
Jdm has 5.1 final drive, audm 4.7. You can tell when driving at 100kph in 6th gear, jdm will be at approx. 4500rpm and audm will be at 3500rpm give or take one or two hundred rpm. Ask anyone who has jdm k20, they will tell you that this is true.

you sure 4500 at 6th gear? it sounds way too high for any factory car...

Nepolian
22-04-2008, 10:10 AM
you sure 4500 at 6th gear? it sounds way too high for any factory car...

Its about 3500 @ 6th.

4500 @ 6th....may be with a 5.3+ FD......LOL

EK4R
22-04-2008, 01:07 PM
thx eg5 for that info.

i stand correct. gearbox on the jdm dc5 and the ausdm dc5 are xactly the same

thebob
22-04-2008, 02:28 PM
I stand corrected to, i guess my informant further stands out that he has no idea what he is talking about.

Nepolian
22-04-2008, 02:45 PM
In regards to the FD2R running same ratios for 1,2,3 and lower 4,5,6 as per Euro R gives it great acceleration with the 5.1 and still gives it a good cruising ratio up high.

Get off the line alot quicker than the EP and DC!

7ypeR
22-04-2008, 03:19 PM
you sure 4500 at 6th gear? it sounds way too high for any factory car...

Easy way to find out. Anyone here have k20 out of jdm dc5r integra? They can maybe clarify this. Someone i knew used to have one and that was how i found out.

sendok
22-04-2008, 03:20 PM
I assume the 4.7 final drive stands better than any other?

barefootbonzai
22-04-2008, 04:10 PM
Easy way to find out. Anyone here have k20 out of jdm dc5r integra? They can maybe clarify this. Someone i knew used to have one and that was how i found out.

nar it's exactly the same as the aussie dc5r. sits around 3400ish cruising @ 100

Dr.k20z1
22-04-2008, 04:42 PM
what brand do u guys recommend, like the best on the market? sorry if i sound noob.. but i am curious lol

roughly how much will we be looking at? and where can we source one?

cheers
Rickee

Nepolian
22-04-2008, 04:59 PM
what brand do u guys recommend, like the best on the market? sorry if i sound noob.. but i am curious lol

roughly how much will we be looking at? and where can we source one?

cheers
Rickee

Im assuming you're taking about the FD?

Cheaper to get a DC5R gearbox so you get the LSD too!

Dr.k20z1
22-04-2008, 05:06 PM
nar bro.. DC5 type s which = no lsd

i know i got ripped off lol

so any answers to my question above? ^^

:D

trism
22-04-2008, 05:11 PM
what are you talking about?

best brand fd?

Dr.k20z1
22-04-2008, 05:14 PM
haha yeah LOL

EG5
24-04-2008, 08:03 PM
what brand do u guys recommend, like the best on the market? sorry if i sound noob.. but i am curious lol

roughly how much will we be looking at? and where can we source one?

cheers
Rickee

Cusco , quaiffe
Both good

wuism
26-04-2008, 03:10 PM
dont know which is the best brand, however whats available is

tracy sport, spoon, j's racing, mfactory, OEM CRV is a couple i know.

j's and spoon is limited to FD of 5.062 which is the same as OEM CRV.

tracy sport has 5.4, 5.7, 6.0 and 6.33 if i'm not mistaken...

mfactory has 5.4 onwards.

i have a spoon FD, and at 100kmph it's not 4000rpm.. it's 3400-3500 rpm.

TODA AU
26-04-2008, 10:26 PM
mfactory has 5.4 onwards.
& 4.0 for drag racing & full 6 speed gear kits available soon

gxiang
27-04-2008, 04:11 PM
thanks for the replies ppl.

how much power would you be expecting to pull at the HUB (not ATW) with a jdm with basic bolt ons? I/H/E