Difference between JDM and USDM B18C5?
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From: Long Island, NY or DC or Philly, USA
Re: What are the exact differences between a USDM and a JDM b18c5? (MiraiZ)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MiraiZ »</TD></TR><TR><TD CLASS="quote">no such thing as a JDM b18c5 
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lol, technically this is true.You are asking about a jdm b18c, sometimes called the b18cR to distiguish it as such.
</TD></TR></TABLE>lol, technically this is true.You are asking about a jdm b18c, sometimes called the b18cR to distiguish it as such.
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From: So Cal
Re: What are the exact differences between a USDM and a JDM b18c5? (MiraiZ)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MiraiZ »</TD></TR><TR><TD CLASS="quote">no such thing as a JDM b18c5 </TD></TR></TABLE>
Yeah I know that. I just put that because I thought people might get confused if I put a USDM/JDM b18c thinking that I was referring to a GSR motor.
</TD></TR></TABLE>Yeah I know that. I just put that because I thought people might get confused if I put a USDM/JDM b18c thinking that I was referring to a GSR motor.
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From: Perth, WA, Australia
JDM has higher compression ratio.
More refined ECU due to better quality fuel.
May be some more differences but here i'm unsure.
Their factory bolt ons are usually more performance orientated aswell, ie, 4-1 rather than 4-2-1 headers.
More refined ECU due to better quality fuel.
May be some more differences but here i'm unsure.
Their factory bolt ons are usually more performance orientated aswell, ie, 4-1 rather than 4-2-1 headers.
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From: ho moon ah, USA
Re: What are the exact differences between a USDM and a JDM b18c5? (Hybrid95CivicEX)
intake and exhaust mani, ecu, no CFK or vtec pressure sensor, or it's located in the ECU (so i've heard), the block stamp, 98 jspec comes with the 4.785FD tranny and slightly longer 4th n 5th gears to compensate for the FD, etc etc...if u want to know the exact differences...a search would help in this case. 
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From: New York, NY, USA
Re: What are the exact differences between a USDM and a JDM b18c5? (all stock)
TB is Larger on the JDM 67mm VS 62mm
JDM has 11.1:1 Compression vs 10.6:1
96spec tranny is same as USDM
But 98 Spec is has a different 4th and 5th gear and 4.785 FD
I think the FW is lighter but this is not confirmed Just I heard someone say that before. (Can any one else Confirm or Deny)
The Intake Manifold is slightly different
Vtec Spool Valve doesn't have a sensor on the JDM Engine
The JDM Head has two studs for the Exhaust Mani and the rest are bolts where ther USDM Head had All Studs
Enternally the Heads are similar but the Cams are Different and the Intake Valves are different.
I hope that clears some of it up for you. I am not sure if I missed anything
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From: santa clarita, ca, USA
Re: What are the exact differences between a USDM and a JDM b18c5? (EK Ferio)
i dont get it, how come the b18c5 complete swap is more expensive than the jdm b18cR swap, when the b18cR comes with more comp. better header and other stuff. is it because the b18c5 are in better condition then the b18cr motors in japan?
Re: What are the exact differences between a USDM and a JDM b18c5? (Type-Rizzle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type-Rizzle »</TD></TR><TR><TD CLASS="quote">Does anybody know if the JDM DC 4-1 header is carb legal?</TD></TR></TABLE>
It is not.
It is not.
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From: Oceanside, Pasadena
Re: What are the exact differences between a USDM and a JDM b18c5? (Type-Rizzle)
I've never heard that the JDM Throttle body is 67mm. I thought that they were the same as the USDM, aside from that little nipple thing that comes out that the top.
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From: C.O.M.A.
Re: What are the exact differences between a USDM and a JDM b18c5? (EGSiX92)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGSiX92 »</TD></TR><TR><TD CLASS="quote">i dont get it, how come the b18c5 complete swap is more expensive than the jdm b18cR swap, when the b18cR comes with more comp. better header and other stuff. is it because the b18c5 are in better condition then the b18cr motors in japan?</TD></TR></TABLE>
they are less expensive b/c you are taking the risk that it is not a good motor. it could burn oil, the tranny could grind, unknown mileage ect.
plus it takes certain parts and wiring for them to work in a usdm car... i recently swapped a b18c(R) in my 94 civic which is already wired for vtec... for a direct bolt-in i needed a set of usdm b-series axles, flange to fit larger header collector, usdm itr throttle cable, usdm b18c5 engine wiring harness, and an ecu that will allow cutoff of the vtec pressure sensor(obd1 p28 w/ hondata in my case).
plus the jdm swaps rarely come complete, you will most likey need to suppliment with parts. i had to source a halfsalft, tranny brackets, shift linkage, mounts, and intake.
in the end my motor turned out to be very strong and clean. i am completely satisfied but due to outside influences i will have to sell it soon. i have put alot of work into that car.
they are less expensive b/c you are taking the risk that it is not a good motor. it could burn oil, the tranny could grind, unknown mileage ect.
plus it takes certain parts and wiring for them to work in a usdm car... i recently swapped a b18c(R) in my 94 civic which is already wired for vtec... for a direct bolt-in i needed a set of usdm b-series axles, flange to fit larger header collector, usdm itr throttle cable, usdm b18c5 engine wiring harness, and an ecu that will allow cutoff of the vtec pressure sensor(obd1 p28 w/ hondata in my case).
plus the jdm swaps rarely come complete, you will most likey need to suppliment with parts. i had to source a halfsalft, tranny brackets, shift linkage, mounts, and intake.
in the end my motor turned out to be very strong and clean. i am completely satisfied but due to outside influences i will have to sell it soon. i have put alot of work into that car.
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Re: What are the exact differences between a USDM and a JDM b18c5? (Type-Rizzle)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type-Rizzle »</TD></TR><TR><TD CLASS="quote">Does anybody know if the JDM DC 4-1 header is carb legal?</TD></TR></TABLE>
I dont know why but I have the crab badge on my dc
I dont know why but I have the crab badge on my dc
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From: Burnaby, BC, Canada
Re: What are the exact differences between a USDM and a JDM b18c5? (EGSiX92)
NOPE
to me USDM motors always have higher mileage and JDM motors have lower mileage....
to me....mileage does mean a lot :D
to me USDM motors always have higher mileage and JDM motors have lower mileage....
to me....mileage does mean a lot :D
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From: Ames, IA, usa
Re: What are the exact differences between a USDM and a JDM b18c5? (5 Zigen)
you don't always get screwed on the JDM motors... my friend swapped a '99 B18C-R motor in his civic. The '99 is supposed to be the best year for the motor. He had actual documentation that the motor had 20,xxx miles on it... (his good friend from college sent him pictures of the motor, the car, and the odometer. Pretty good deal 
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From: Nowhere and Everywhere
Re: What are the exact differences between a USDM and a JDM b18c5? (MEANB18)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MEANB18 »</TD></TR><TR><TD CLASS="quote">you don't always get screwed on the JDM motors... my friend swapped a '99 B18C-R motor in his civic. The '99 is supposed to be the best year for the motor. He had actual documentation that the motor had 20,xxx miles on it... (his good friend from college sent him pictures of the motor, the car, and the odometer. Pretty good deal </TD></TR></TABLE>
hmm you're not talking about my friend are you? We both go to the same college, and we just swapped a 99 B18C-R into his Civic, and I tell you it can't have more than 20K on it, it's cleeeannnnn.
</TD></TR></TABLE>hmm you're not talking about my friend are you? We both go to the same college, and we just swapped a 99 B18C-R into his Civic, and I tell you it can't have more than 20K on it, it's cleeeannnnn.
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From: Oceanside, Pasadena
Re: What are the exact differences between a USDM and a JDM b18c5? (PatrickGSR94)
How is the 99 JDM ITR motor considered the best? What's wrong with th 98 and 00 motors to make them inferior?
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From: japizona
Re: What are the exact differences between a USDM and a JDM b18c5? (Fowler)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fowler »</TD></TR><TR><TD CLASS="quote">How is the 99 JDM ITR motor considered the best? What's wrong with th 98 and 00 motors to make them inferior?</TD></TR></TABLE>
who considers them the best? ive got a 99, but i never thought it was any difference from the other years..
who considers them the best? ive got a 99, but i never thought it was any difference from the other years..
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From: New York, NY, USA
Re: What are the exact differences between a USDM and a JDM b18c5? (Fowler)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fowler »</TD></TR><TR><TD CLASS="quote">I've never heard that the JDM Throttle body is 67mm. I thought that they were the same as the USDM, aside from that little nipple thing that comes out that the top.</TD></TR></TABLE>
Nope The JDM TB is Larger bore. There was a photo floating around here somewhere.
Probably the reason the engine is Cheaper than US spec is that you can get the whole CAR (96Spec) for the same price you pay for a Whole USDM Engine. So that is probably a good reason sellers can make the same $$ at a lesser price.
Nope The JDM TB is Larger bore. There was a photo floating around here somewhere.
Probably the reason the engine is Cheaper than US spec is that you can get the whole CAR (96Spec) for the same price you pay for a Whole USDM Engine. So that is probably a good reason sellers can make the same $$ at a lesser price.