What makes the difference in hp ratings between a b18c5 and a b18c itr motor? Is it ecu related or mechanically related?

 

both ECU and Mechanically are different

JDM=higher comp
USDM =lower comp

JDM ECU= better maps for higher octane
USDM ECU = octane set up for 91

 

its the compression the b18c5 has lower compression its around 10.6 while the b18c itr motor comes with 11.1

 

here in the U.S. we get screwed on everything. we don't get the cool cars, we always get the watered down version of everything

 

its like about 10-15 hp difference

 

Is Vtec activation on the JDM ITR ECU controled wtih no oil pressure switch input as opposed to the standard USDM knock sensor/oil pressure input?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GUILOTINE &raquo;</TD></TR><TR><TD CLASS="quote">its like about 10-15 hp difference</TD></TR></TABLE>

That not only is the higher compression, but also the better header and exhaust. The JDM exhaust is 2.25" ID opposed to the USDM 2.25" OD.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99whitejizzer &raquo;</TD></TR><TR><TD CLASS="quote">here in the U.S. we get screwed on everything. we don't get the cool cars, we always get the watered down version of everything </TD></TR></TABLE>

Awsome statement!!! Thats the truth 100%

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99whitejizzer &raquo;</TD></TR><TR><TD CLASS="quote">here in the U.S. we get screwed on everything. we don't get the cool cars, we always get the watered down version of everything </TD></TR></TABLE>

No kidding....from cars to beer....

 

But you guys got all the nice all motor parts and drag strips to race!
I have to pay around $1000 every 2 years in taxes/inspection or pay the same $1000 or so to get my car inspected/tagged if I pick up a car that has already been deregistered............
The upside is all the cool cars and not worrying about your car getting jacked!
Born/raised lived in Tokyo 90% of my life!

 

&lt;=== Born and raised in Japan, but Korean... she's so cute isn't she?

 

nice!

 

Hey ken, check my post in GEn. disc. I want to talk about living in Japan, but I dont want to get this thread locked.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xEnderx &raquo;</TD></TR><TR><TD CLASS="quote">Is Vtec activation on the JDM ITR ECU controled wtih no oil pressure switch input as opposed to the standard USDM knock sensor/oil pressure input?</TD></TR></TABLE>

The JDM ECU has no VTEC pressure switch, no EVAP purge valve, and no second oxygen sensor. It's basically like an OBDI ECU with OBDII plugs. Speaking of such things, there is no such thing as OBDI or OBDII in Japan.