I understand that the B18C is the Japenese version of the USDM R motor. Are there any major differences? The are basically the same motor, correct?

Thanks,

 

JDM motor has higher compression

 

Jdm have higher compression, 98 Spec Headers and final drive.


Modified by jmk2888 at 5:08 PM 6/23/2004

 

Different exhaust manifold? Not sure.

 

98 spec jdm itr motor

4.785 final drive
jdm 4-1 exhaust manifold
higher comp pistons

 

all of the above and also more hp.. about 210.. if i'm not mistaken

 

I'm not sure of that, there is a difference between the standard of JDM/EUDM and USDM power calcul.
Look, the EUDM engine (B18C6) have JDM compression, JDM final Drive, 240 degrees and 11.5mm valve lift intake cam. It also have the USDM header (****). And this engine produce only 190 HP (at crank) Standard ISO with unleaded 98 octane.

The USDM engine with lower comp (10.6:1 vs 11.1:1) produce 195 HP SAE with 93 Octane. (or 91 i don't know).

The JDM engine with the stainless 4-1 header produce 200 HP.

Find the error, i'm sur a B18C5 USDM engine with the European ISO power calcul will produce only 180 or 185 HP.

 

The B18C6 has an even shittier header than the B18C5. It's done that way to meet the emission requirements in Europe. Japan use a different correction factor for HP.
The JDM B18C makes 200 HP (JIS or something). B18C6 with JDM 4-1 header will make the same power.
There are a lot of small differences between these 3 versions. Some sensors are different and/or injectors, ECU etc.

The JDM 98 B18C has the best specs...

 

JDM ITR produces a bit higher HP than 200 as written in spec. Almost 210....

EU ITR makes cca 192 totally stock, with no cat it makes 196.

Ofcourse, it matters if the car is mantained as it supposed to be.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Twin-cam &raquo;</TD></TR><TR><TD CLASS="quote">JDM ITR produces a bit higher HP than 200 as written in spec. Almost 210....

EU ITR makes cca 192 totally stock, with no cat it makes 196.

Ofcourse, it matters if the car is mantained as it supposed to be.</TD></TR></TABLE>
Of course it's possible with individual engines. We are talking about factory specs. Even with the factory specs it's difficult to compare the numbers, because of the different norms/correction factor.

 

What about ECU's?

USDM is P73 OBD2, and the EUDM is a P72 OBD1 and the JDM is the same as EUDM?

 

All hondas produced after 95/96 have OBD2 ECUs, isnt that correct ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Twin-cam &raquo;</TD></TR><TR><TD CLASS="quote">All hondas produced after 95/96 have OBD2 ECUs, isnt that correct ?</TD></TR></TABLE>
Nope

 

ITR EUDM: P73 OBD2 No PA sensor. No 16 Pin OBD2 diag.

 

The b18c makes 197 hp. Period. Not 210, not 200, it's 197,

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Justin Klemgold &raquo;</TD></TR><TR><TD CLASS="quote">The b18c makes 197 hp. Period. Not 210, not 200, it's 197,</TD></TR></TABLE>
http://www.honda.co.jp/factboo....html

So, you are saying 200 PS = 197 HP?

This is an useful conversion page: http://www.auto-report.net/ind....html

 

Yes, 200 ps is 197 hp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Justin Klemgold &raquo;</TD></TR><TR><TD CLASS="quote">Yes, 200 ps is 197 hp.</TD></TR></TABLE>

:lightbulb:

We have a winner ...... Bob ...tell him what he's won.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tsunami_zc &raquo;</TD></TR><TR><TD CLASS="quote"> Well Bob, our lucky winner has won
A 6 piece LV luggage set.
</TD></TR></TABLE>

My GF has warped my sense of idea's.

 

Sorry........

Orginal quote was mine, not tsunami_zc.

Gotta stop bloody cut and pasting.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NW94RS &raquo;</TD></TR><TR><TD CLASS="quote">
4.785 final drive
</TD></TR></TABLE>

Don't forget that it has taller 4th and 5th to compensate for the final drive.

96Spec tranny is the same as ours with the 4.4 FD and same gearing.

 

Which engine would you prefer: the C or C5?

 

Of Course C5, JDM B18C (type-R) or K series(Type-R) if you can afford it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Justin Klemgold &raquo;</TD></TR><TR><TD CLASS="quote">Yes, 200 ps is 197 hp.</TD></TR></TABLE>

So what you are saying is with a much better exhaust manifold and higher compression, the JDM B18C is only better than the B18C5 by 2 horsepower?

*taking higher compression pistons and 4-1 header with 2.5" collector off my list of parts to buy*

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Comp97GSR &raquo;</TD></TR><TR><TD CLASS="quote">

So what you are saying is with a much better exhaust manifold and higher compression, the JDM B18C is only better than the B18C5 by 2 horsepower?
</TD></TR></TABLE>
JDM B18C is rated at 200 PS JIS or 197 HP JIS.
B18C5 is rated at 195 HP SAE.
B18C6 is rated at 190 HP ECE.

The
You cannot compare these numbers with each other without knowing the conversion factor. I cannot find the conversion factor on the net for these standards.