Are those two motors different from eachother ??? help guyz ..... cuz i just bought a JDM b18c-r from Japan and its already in my civic si ( works great by the way, B16A2 is nothin compare to Type R motor ) so yea can u guyz help me with this...i've heard many sotries but i dont know witch one is true ....
thanx !!!!!!!!!!

 

11.1:1 compression, different valve cover and oil cap, different exhaust manifold, etc. JDM = 200bhp / USDM = 195bhp

 

so there isn't much of the difference right

 

and of course... u get the a better final drive in the jdm tranny

 

oh and i forgot to say that my top speed is only 130mph

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HollaFoNick &raquo;</TD></TR><TR><TD CLASS="quote">and of course... u get the a better final drive in the jdm tranny </TD></TR></TABLE>

Oh yeah....****....I forgot about that. I even have that in my own tranny. And I still forgot


They are not that much different

 

130mph and then cuts fuel ( at 6300 rpm )

 

That 130 top speed sounds like an ECU speed governor or something, and what a low speed at that.

 

yea, the JDM motors have that, dont know why, i spoke to some people who got the JDM motors and they said they only could get to 125-130mph no more !! but its not that bad i guess

 

why does the jdm itr only get 5 bhp over the usdm itr. When jdm b16a get 170 to usdm 160 and the jdm b18c GSR get 180 compared to the usdm 170. The jdm itr should be 205 bhp right? But it's not. Can someone explain this?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by white rocket &raquo;</TD></TR><TR><TD CLASS="quote">11.1:1 compression, different valve cover and oil cap, different exhaust manifold, etc. JDM = 200bhp / USDM = 195bhp</TD></TR></TABLE>

The JDM motor is 200ps, not 200hp. 200ps = about 197hp

 

also newer JDM ITR motors have better intake cams

 

It's not like there's a standard where the JDM engines have 10 more hp or something, that's just how it happens to work out. The only differences I believe are pistons, giving a higher compression ratio, and slightly different ECU tuning.

 

So better intake cam, better compression and better header and only make 2 more horsepower than the usdm. Would the usdm itr with jdm 4-1 header, piston and intake cam make more power that the jdm itr?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bobbi Digital &raquo;</TD></TR><TR><TD CLASS="quote">also newer JDM ITR motors have better intake cams</TD></TR></TABLE>

ALL 00-01 ITR motors had the same intake cam as the CTR, not strictly the JDM ITR's.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by realis9 &raquo;</TD></TR><TR><TD CLASS="quote">So better intake cam, better compression and better header and only make 2 more horsepower than the usdm. Would the usdm itr with jdm 4-1 header, piston and intake cam make more power that the jdm itr?</TD></TR></TABLE>

Not one person on this board can say how Honda decides to rate their motors. However, I can tell you from real-world experience, JDM ITR's typically put down between 170-180whp, and USDM ITR's put down somewhere in the 160-170whp range.

 

Since when do they make B18C-R? It's just a B18C. As far as differences, you can probably get the JDM motor cheaper. The best advantage is if you get the trans as well and it's 98 spec you will get the 4.7 FD instead of the US 4.4 FD.

 

j00 get to say that you have m4dd jdm poweR y0!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sscguy &raquo;</TD></TR><TR><TD CLASS="quote">That 130 top speed sounds like an ECU speed governor or something, and what a low speed at that.</TD></TR></TABLE>

Lose the governor.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by realis9 &raquo;</TD></TR><TR><TD CLASS="quote">So better intake cam, better compression and better header and only make 2 more horsepower than the usdm. Would the usdm itr with jdm 4-1 header, piston and intake cam make more power that the jdm itr?</TD></TR></TABLE>

We're talking about 1-2 WHP here. That would be the biggest waste of money. If your going to start swapping parts you may aswell go aftermarket.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dave_B &raquo;</TD></TR><TR><TD CLASS="quote">Since when do they make B18C-R? It's just a B18C. As far as differences, you can probably get the JDM motor cheaper. The best advantage is if you get the trans as well and it's 98 spec you will get the 4.7 FD instead of the US 4.4 FD.</TD></TR></TABLE>

since we are the topic of JDM itr motor. I have a 98 spec motor with the 4.7 FD my brother has at 2000 civic si I find that in 5 gear at the same Rpm we are at the same mph. I though the JDM 98 spec tranny has the GSR 4,5 gear which means they are longer. According to best motoring the 1,2,3 gear are good but the 4,5 are not as good.

 

I haven't studied the gearing other than the FD but I'm sure Ken could calculate it out for you as i've seen him do it in the past. If you need an answer just PM nsxtasy

 

i dont think you'll find much of a difference between the 4 models (jdm&gt;'98 jdm'98&lt;, euro & us) i know the manifold to be the week point on the euro specs (187bhp) never seen a US model,i think whats seldom is wonderfull & jdm stuff is special 'cause its different,theres a lot of people here replace the honda badge with acura for that reason. the 16' wheels & brakes on the jdm '98&lt; are a big plus, i got a '97jdm put in a 4.9 & 17's
jdm itr's &gt;98 & '98&lt; have almost identical 400m times & top speed (4.4 & 4.7)

 

You are correct about the JDM gearing. The FD is different, but so are 4th and 5th gears (1.107 4th and 0.848 5th for US, 1.034 4th and 0.787 5th for JDM). It winds up being not that different. Now the JDM FD in a USDM tranny is something, but if you're doing that you might as well just go with an ATS 4.929 or something.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by realis9 &raquo;</TD></TR><TR><TD CLASS="quote">

since we are the topic of JDM itr motor. I have a 98 spec motor with the 4.7 FD my brother has at 2000 civic si I find that in 5 gear at the same Rpm we are at the same mph. I though the JDM 98 spec tranny has the GSR 4,5 gear which means they are longer. According to best motoring the 1,2,3 gear are good but the 4,5 are not as good. </TD></TR></TABLE>

My 4.7 has me at 5krpms @80mph. Thats from the stock tach so its a bit lower. My friends SI is no that high.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by walker111 &raquo;</TD></TR><TR><TD CLASS="quote">

My 4.7 has me at 5krpms @80mph. Thats from the stock tach so its a bit lower. My friends SI is no that high.</TD></TR></TABLE>


me with 98 jdm tranny 4.7 Fd 4krpms about 73mph

 

JDM B18C 200PS (198HP)
USDM B18C5 195HP

3 more extra HP from JDM and that's it