I am ordering the jdm b18c1 from HMO at the end of this month, just wondering what is the difference between the jdm and usdm engine? And they say they average 35-40k miles, Is that really true?

 

the main difference i believe is the compression ratio in a jdm is .2 higher than usdm models.

 

yea i knew there was some difference in compression but i didn't know how much, is that pretty much the only difference?

 

well theres other minor differences, such as the vtec solenoid on jdm engines doesnt use an oil pressure switch, and obviously a jdm block is only stamped B18C instead of B18C1/4.... thats about it that i know of though.

 

they have crappier gas ran through it. japan has crappy gas compared to us.
there was an article about it awhile back and 43 threads of arguements

 

does not having the switch on the vtec solenoid cause any problems when installing it? I bought a rywire cx to gsr subharness. "This will add VTEC, VTEC Oil pressure, 4 wire 02, IAB and Knock to your CX Chassis."

 

for argument sake if you live in a state with emissions codes, the jdm will not work for you. i live in CA so there are harsh standards for jdm engines, and you have to do some exhaust, vacuum, and other small work to get it up to par. but it does not sound like PA has the same standards...

check out the Hybrid Forum. lots of good info there on swaps...

 

wow, didnt know that motor existed...

 

post your nonsense elsewhere.

 

there are certain parts of PA that check emissions but not where i live, Thanks for the info.

 

 

JDM B18C doesn't have the EVAP Purge Solenoid.

 

do you know if i would have any problem with the rywire sub harness for the gsr engine since it will be going on the jdm engine?

 

Should be fine, you'll just need to jumper the vtec oil pressure switch. The evap purge shouldn't matter as far as I can remember.

 

since its not on the engine to begin with why do i have to worry about putting the oil pressure switch on?

 

Cause unless you are running a JDM ECU, you will get a CEL for VTEC Oil Pressure Switch and VTEC will not engage.

So, if you plan on running a USDM ECU, you will need to get a USDM VTEC Solenoid with the pressure switch.

 

i am using the p72 ecu that comes with the engine, wouldnt that be the jdm ecu since everything else that comes with the swap is?

 

I ordered the exact complete swap JDM GSR odb1 from HMO. IT is stamped B18C. There is no 1/2/3/4 on it. Got it installed saturday.

I bought a USDM GSR ODB1 engine wiring harness. the ONLY thing I had to do wire wise, was switch A17 to A20, and wire in a knock sensor. (92's already have vtech wired in)

Also make sure you have the following things.

GSR Throttle cable
GSR upper and lower Radiator hoses
GSR Heater core hose

Also your fuel return line will be a lil short as well, you will need to get a lil bit longer hose.

This was ALL installed on a 92 CX

Last thing, E-brake cables are a bitch to put in a rear disc brake conversion...glad its all done

 

yea i talked to steve and he told me the stuff i need but never said anything about the wiring, i think i have a pretty good idea of what i need to do now.

 

Does anyone have a writeup on how to wire in the knock sensor?

 

The mileage is claimed to be around 40k. I've never seen any proof of it being the case, but I've seen 25+ Hmotors swaps and every single one of them was clean enough to eat on and ran like a champ so it's all good. Anyone know if there's a way to prove they really have as low miles as they claim? It's hard to believe the early 90's spec motors only have 40k on them, but I trust Steve so never let it really bug me.

 

yes mine is extremely clean looks brand new, still am working on some wiring ect.

 

The reason JDM engines have such low mileage is that Japan is the size of California in area. Cars are driven short distances because it costs a fortune to take the tollways for any distance. Most sane people take the train for long distances.

Another reason is that once a car is a certain number of years old, they have to go through a super-strict inspection called "shaken". This can cost the owner of the car $2-3K every two years to keep the car up. Most Japanese opt to get a new car instead. Having lived in Japan for 3 years, I can tell you that I can count on my hand the number of cars older than, say, 5 years that I'd see per week. I've been offered a 5-year old Toyota minivan for FREE but I had to pay the shaken. I declined.

Because of all of this, thousands of perfectly good, low-mileage cars get shipped to NZ, Australia, and the UK and get flipped for several times what was paid for them. The rest get shipped as pieces to the US. That's why there are so many JDM motors with less than 40K miles on them.

fm

 

that must suck to live in japan to go through that ****, but does anyone have a writeup on how to wire in a knock sensor?

 

Is this going in an OBD2 car? If the block is not tapped then you can tap your alternator bracket install the knock sensor there. I'll have to get back to you on the wiring.