What are the main diferences between b18c1 usdm and b18c jdm motors?
Can't deside which to put in my eg.

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'95 Civic Si

 

optional lsd tranny....but then u could change out to any Bseries tranny with LSD
higher compression on jdm gsr...(10.6cr)

and it doesnt say "1" on the engine block code

 

A jdm B18C is a Type R not gsr

 

jdm gsr and type R both say b18c as engine block codes...
he specified jdm gsr...not type R

 

Ok well correct me if I'm wrong here but isn't a b18c1 the code for usdm gsr and b18c is the jdm SiR? Type R would be b18c5 for both usdm and jdm versions....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NotUrAvgSi &raquo;</TD></TR><TR><TD CLASS="quote">A jdm B18C is a Type R not gsr</TD></TR></TABLE>

insert foot into mouth

SIR-G= JDM B18C

Japan ITR= JDM B18C

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmekcivic98 &raquo;</TD></TR><TR><TD CLASS="quote">Ok well correct me if I'm wrong here but isn't a b18c1 the code for usdm gsr and b18c is the jdm SiR? Type R would be b18c5 for both usdm and jdm versions....
</TD></TR></TABLE>

No, Japan ITR has B18C where USDM has B18C5

 

oh ok.....my bad I just read up and found that out.

 

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


SIR-G= JDM B18C

Japan ITR= JDM B18C</TD></TR></TABLE>

 

finally.....thanks

 

I would rock the SIR-G... But I am biased

 

the jdm type r and sir-g are both "typr r" blocks with different heads... i think its somethin like that

 

FIRED.

 

the JDM motor may be hard to smog. the higher compression causes higher NOX #'s. also, you need to add a usdm throttle body and vaccum nipple to the JDM motor to get it BAR'd

 

jdm = higher compression, slightly higher hp (less restriction, more pollution) and dont forget the fact that is jDm y0!

Since you live in cali though, i would highly reccomend the usdm b18c1 for emissions, as stated above. If you do get the jdm one, u will basically have to convert it over to usdm settings..ecu, throttle body (also stated above)and some other things.

and for the newbs who were posting about r, gsr thing:

JDM b18c-gsr(SiR-G) = b18c on the block with p72 stamped on the head
JDM b18c-r = b18c on the block with p73 stamped on the head.
There are also other visual differences such as intake, intake manifold, etc..


Modified by Chris M at 3:28 AM 2/17/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NotUrAvgSi &raquo;</TD></TR><TR><TD CLASS="quote">A jdm B18C is a Type R not gsr</TD></TR></TABLE>

both JDM B18C's are either GSR, or ITR... the only way to reconize the differance, are the intake manifolds, and the head stamps, P73 ITR, or P72 GSR. bottom ends are the same.

 

I sure as hell wish the GSR's didnt come with the butterfly bullshit, even though its been proven great for stock setups and mild builds. The more and more I read on them, they ******* blow. Too restrictive. I think its time for skunk2 or victorx.

 

My buddy has a integra type r motor. And it's stamped B18cR.

 

when there's a number in the code like b18c1, b16a2, h22a1 its a usdm motor if u don't see a number after the letter in the code it's a jdm motor. for jdm type r and gsr motors both are coded b18c

 

i wish back then, i had a camera, but ive seen some really weird stamped blocks... some actually blank except for a serial number.

in fact, i still have one. let me see if i can find a pic.



2nd GEN JDM B16A. (hydro tranny)

 

interesting i never seen anything like that before

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Built B16A &raquo;</TD></TR><TR><TD CLASS="quote">i wish back then, i had a camera, but ive seen some really weird stamped blocks... some actually blank except for a serial number.

in fact, i still have one. let me see if i can find a pic.



2nd GEN JDM B16A. (hydro tranny) </TD></TR></TABLE>

looks 'chopped to me. im sure there might have been factory error where stamps were forgotten. you could even buy your own metal stamping set and stamp "m4dd tit3 jDm y0" on it

 

pistons are different.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Phantastic &raquo;</TD></TR><TR><TD CLASS="quote">when there's a number in the code like b18c1, b16a2, h22a1 its a usdm motor if u don't see a number after the letter in the code it's a jdm motor. for jdm type r and gsr motors both are coded b18c </TD></TR></TABLE>

yep yep he's right, JDM Motors they do not have a number infront of it as in b16a2-a3 b18c1-c5 which are USDM

JDM motors are b16a, b18c, b16b h22a....and so forth

 

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

looks 'chopped to me. </TD></TR></TABLE>

when i get home, ill upload another pic onto my web hosting, and show it to you from a differant angle.