Is it any different than installing a 93 US spec engine? Maybe we can get a list going of what you need to do a sucessful swap (like parts you absolutely must change from US spec to JDM). I'm considering this swap and don't want to blow the engine because I didn't switch over a part that needed to go with the JDM engine.

 

I'm not sure but I think you can just use the bare shortblock and use all of your accessories/wiring/ecu/etc, or it you want to use the jdm engine with all accessories and stuff, you need the jdm ECU and wiring harness, as the newer ones were 16-bit and our are all 8-bit.

Again, I'm not sure about this, but it's what I've heard.

 

There is no real difference between the two blocks.

Some people will argue that there is better oiling in the later JDM engines but I say this is bunk.

The butt dyno test will not notice any difference between a "used" jdm engine and a domestically sourced reman.

 

Sure there is, JDM gives you about 5 more horsepower than a good, solid decal setup.

 

WTF?

 

WRONG

TRY AGAIN FORSAKEN.

 

It's called sarcasm.

 

I know,

darn caps lock.

 

Sorry, just did a search and found that it in fact adds FIFTEEN more horsepower...

 

i just did a jdm engine swap

u need to lenthen one wire, and if the motor is +96 and up u need the to get another plug (blue) that is on the US engine harness to make the engine fire

GL

mike

 

The short block itself is damn near the same. Same ports, same rotors, same seals, etc. The only difference with the short block itself are the rotor housings have a different surface treatment and the orifice size on the oil injectors is slightly different.

The rule when swapping in another motor is simple. Strip it down to the short block, compare the long block components, and run whatever is the best component for the job. Most of the engine parts on the later motors are either the same or slightly different - for example, I don't believe the JDM cars had EGR, so there's no provision on the LIM for the EGR valve.

In '96, Mazda updated the control system for the twins to make it simpler. But, making the later system work properly with the '93-95 ECU would be VERY complicated and really not worth the effort.

To be on the safe side, you can always run JUST the JDM short block and bolt all the external stuff from your old block to it. That will work no questions asked.

Dale

 

Depends what your trying to acheive yes the housings are different.

There is only one advantage to going to a 99' spec engine......

1 x 99 spec high flow turbos....... Better in stock applications how ever one big broblem with them they are lighter so are easier to break

Biggest difference if all is the 16-Bit ECU. Great for stock apps once again but i'd recommend changing to the PFC anyway.

So if you wanna build a 280 stocker then you will need to change your whole loom.

If you want to mod it either buy a PFC or buy a locally sourced engine as there is no real advantage apart from stock

 

having a faulty Pulsation Dampener is a good way to make an engine fire too

 

^ bitch lol

 

Wrong

Try again forsaken, and this time read the thread.

He was asking about the engine, not the TURBO'S

The engines are the same. 99 spec turbo's will give you 15 more horsepower.

 

Either you're incredibly dense...or you've mastered sarcasm to a level never before seen....

 

There is a 16-bit powerFC on ebay right now. I think around $700 with commander.


Shawn

 

Yeah, but it's totally useless without the ENTIRE later engine harness, later sensors/solenoid rack, and who knows what else. Again, no one that I know of has ever swapped the later Japanese fuel injection system onto a US 93-95 car, mainly because the work involved likely wouldn't be worth it.

Remember, Mazda considers the engine the WHOLE package. The real difference in the 280hp engines is slightly better flowing exhaust, a bit more boost, the Efini Y-pipe, and the better turbos.

Dale

 

if turbos go for 2300 im surprised people don't buy the block and keep their old turbo and sell the 99 spec turbos. so say you buy the complete engine/tranny for $3100. Then you sell the turbos and you got a 99 low mileage engine for less than a grand.