Dumb motor question

[Protege_MP3_506]

What is the difference between FS-DE and FS-ZE?? I think it was ze anyways, might have been zl. But I saw a mazda motor in the back of an old truck behind a dealership so i looked at it and he said I could probably buy it from them. I just would like to know the difference

 

[bgibb68]

the ze is the jdm version...different intake mani and camsand a few lil things i believe

 

[isbre]

The FS-DE is the NADM version, the FS-ZE is the JDM version. You can really see the difference on the intake manifold. It also has higher compression and is only OBDI compliant. From what I've heard the cams from a ZE is good in a trubocharged DE.

 

[KrayzieFox]

The FS-ZE has higher compression pistons (10.7:1) and a more aggressive exhaust camshaft. And it also has a specially tuned ECU, so you'd need to get your hands on a ZE ECU if you wanted to use the engine in your MP3.

 

[niky]

You can bolt all the important stuff from the ZE up to the stock car. Just reuse your stock sensors.

All you really want is the high-compression bottom end, the cams and the intake manifold with the resonator.

You won't see the full effect of the extra power, though, unless and until you can get a standalone that will allow you to eliminate your stock rev limiter. The ZE sees peak power at nearly 7000 rpm, above what the stock ECU will give you.

 

[CulRidr]

You can bolt all the important stuff from the ZE up to the stock car. Just reuse your stock sensors.

All you really want is the high-compression bottom end, the cams and the intake manifold with the resonator.

You won't see the full effect of the extra power, though, unless and until you can get a standalone that will allow you to eliminate your stock rev limiter. The ZE sees peak power at nearly 7000 rpm, above what the stock ECU will give you.

The MP3 ECU must be different because my rev limiter hits at 7000...

 

[ucMP3]

The MP3 ECU must be different because my rev limiter hits at 7000...

It is. FS-ZE is OBD1 and rev limit is a lot higher than 7k. I think ~8-9k or so...

 

[niky]

Over-reading tach? My engine redlines at 6700 rpm by the tach, but diagnostics show it to be 6500 rpm only. Redline according to specs is 6500.

FS-ZE limit is supposedly between 7k-7.5k rpm. No way can the stock valvetrain or bottom end handle 9k rpm. At least, not for very long.

Either your tach is extremely optimistic, you've got a freak FSDE/FSZE hybrid ECU, or you've accidentally entered the up-up-down-down-left-right cheat code that unlocks the redline. If it's the final item, please PM me the code. Having Stage II Integrals and a stock redline sucks. (headbang)

 

[ucMP3]

Over-reading tach? My engine redlines at 6700 rpm by the tach, but diagnostics show it to be 6500 rpm only. Redline according to specs is 6500.

FS-ZE limit is supposedly between 7k-7.5k rpm. No way can the stock valvetrain or bottom end handle 9k rpm. At least, not for very long.

Either your tach is extremely optimistic, you've got a freak FSDE/FSZE hybrid ECU, or you've accidentally entered the up-up-down-down-left-right cheat code that unlocks the redline. If it's the final item, please PM me the code. Having Stage II Integrals and a stock redline sucks. (headbang)

Rev limiter is not the same as redline. 6500 is the beginning of the redline. But rev limiter doesn't bounce til ~7k. I thought the fs-ze redline was higher than 7.5k, but I'm not really sure, rev limit is probably whats closer to 8k... (shrug)

 

[niky]

Rev limiter is not the same as redline. 6500 is the beginning of the redline. But rev limiter doesn't bounce til ~7k. I thought the fs-ze redline was higher than 7.5k, but I'm not really sure, rev limit is probably whats closer to 8k... (shrug)

If you want to get technical about it:

My engine hits the limiter on the tach at 6700 rpm.

It says 6700 rpm on the tach, but an OBD data-logger shows it to be 6500 rpm.

Your engine may seem to be hitting the limiter at 7000 rpm, but there's a distinct possibility your gauge is simply over-reading.

 

[CulRidr]

That would make sense for me then

 

[ucMP3]

If you want to get technical about it:

My engine hits the limiter on the tach at 6700 rpm.

It says 6700 rpm on the tach, but an OBD data-logger shows it to be 6500 rpm.

Your engine may seem to be hitting the limiter at 7000 rpm, but there's a distinct possibility your gauge is simply over-reading.

Cool. Honestly, I haven't been near the rev limiter since the new motor a few years ago. But after ~6200 rpm's, the fs-de has nothing left, so it's pointless to stay in gear that high, for me anyways. Need to switch to jspec cams... (lol2)

 

[niky]

Integral baby. Then you'll wish you had an 8k limiter. Without cam gears, they don't start breathing till 5.5k rpms... (yupnope)

That would make sense for me then

Again, though, if you put it up on a scanner and it turns out that it really is 7k... I'd like to know the cheat code. (drive)

 

[ucMP3]

With a standalone, how high can you safely bump the rev limit up to?

 

[niky]

Till the motor blows up. Other members say the motor really isn't that good for much more revs than stock... Opinions vary, but most people stick below 8k.

But every little bit helps. Personally, I just want to get out of the 3.5-4k hole on the 1st-2nd upshift.

 

[80884M]

So has anyone done this swap cuz in having trouble with my Pro5

 

[niky]

Did you use all your stock sensors with the engine? It should run if all your stock FS-DE sensors are used. You just won't get the higher rev limiter from the stock box.

 

[80884M]

Yeah but i heard from Focus that i need the jdm ecu and harness to start the engine and the crankshaft ring teeth are different

 

[niky]

You'll have to ask other US members who've done the swap. I haven't done it myself, but clubmates locally have done it. Since we have the OBDI ECU, what I know of the swap won't help you with specific wiring issues.