Engine question about FS series engine's

[Silverfox]

I am wondering why more people are not talking about doing a FS-ZE swap in their MP5 as from what I am reading it is rated at 170hp over the stock 130hp we have now, these are close if not the same as the KL swaps I am reading others doing. Is there a reason people are not doing this? am I not reading this correcly? what am I missing as it just seems like a great swap with the added HP and what would look like a direct fit with the current mounts and transmission.

Here is one on Ebay: http://www.ebay.com/itm/MAZDA-PROTE...s=63&clkid=7405006745706156852#ht_5639wt_1270

 

[Silverfox]

The 2.0 L (1991 cc) FS has an 83 mm bore and 92 mm stroke and produces 130 hp and (97 kW) and 135 lbfft (183 Nm) in its most common variant up to 170 hp in the Japanese Domestic Market. In 1998 the engine evolved into the FS-DE by undergoing several changes, most notably a distributorless ignition as well as the move from hydraulic lifters to solid shim-on-bucket lifters. Japan received a higher-performance 170 hp version, known as the FS-ZE. Mazdaspeed decided to turbocharge the regular FS-DE, as the FS-DET in 2003 for the Mazdaspeed Proteg and it generated 170 hp (127 kW) and 160 lbfft (217 Nm), the same hp rating as the naturally aspirated JDM FS-ZE but with a sharper torque curve. This means that the Mazdaspeed Proteg's engine is internally identical to the regular FS-DE, except with a turbocharger installed onto it.

 

[tweety2300]

The fsze usually has some complications look around on the forum the engines were also designed for higher octane gas than what the is has at the pumps which really doesn't matter

The main differences between an fsze and fsde are the fsze has 10.4:1 cOmpression pistons more aggressive cams a special intake manifold and a 4-2-1 header

The header from what I've seen rarely comes with the motor the intake manifold isn't much better than a ported and polished manifold and the cams and pistons you can easily buy

My guess for why people don't do it is the fs isn't a very good na platform like the kl is

 

[Silverfox]

Cool thanks for that info, I am still very new to these Mazda's as I am coming from a Foxbody Mustang background and I am a GM Technician by trade.

 

[SoCalMP5]

I think it's because of the PITA factor and overall landed cost. If you're in the states, you're going to pay for international shipping on a ~300lb pallet. It's not going to be cheap...at least 200 bucks, which puts you around $1000 to get your hands on the motor.

Then...what is it missing? What parts will you have to hunt for in order to drop it in? If it doesn't come with the matching ECU, you're screwed. So you'll have to buy that separate if you can find one.

Octane is an issue too, though you might be able to get away with lower than preferred. Japan would recommend 98 or 100 RON for higher compression engines, which is part of the reason their engines show higher HP. 98-100 RON would be about 93-95 octane here in the states. If you take that 170hp engine and run it on 91, it's going to retard timing so it doesn't blow itself up, and you no longer have 170hp...maybe closer to 160.

$1000 + unforeseen expenses + effort of the swap and all the time spent for a gain of ~30hp? It would be sweet to have, but that seems like a lot of cost, time and trouble for 30 ponies. I think for a lot of people too, they stay with a P5 because it's economical...this is my econobox car, not my toy...so a huge mod like this which will make it more expensive to drive every time I turn the key (premium fuel + lower MPG at the same time) isn't in the cards for my P5 unfortunately!

 

[big Lou]

Cool thanks for that info, I am still very new to these Mazda's as I am coming from a Foxbody Mustang background and I am a GM Technician by trade.

Just get a turbo kit and you will be much happier with that! Rather than swapping the engine.

 

[tweety2300]

Either turbo or kl is the way to go for power. The best ecu setup for the fsze is stand alone or a mp3 / split second setup

 

[Ice88]

There is two versions of the FS-ZE the normal run of the mill version which came in capellas, 626s etc which had 10.4:1 compression a different intake manifold, exhaust manifold (4-1 shorty then, has a 2-1 after pipe. Is not a performance header by any sense of the word really) and standard JDM cams (not special cams). And the mazdaspeed version which has 10.7:1 Compression, a proper 4-2-1 header (similiar to the autoexe header, well tuned too ), mazdaspeed cams and from what a friend has told me (who owns one of these engines) it also has some light port polishing.

The fs-ze intake manifold has a resonance chamber? Essentially i guess its main purpose was to produce a meater sound but it also has the benefit of increasing the plenum volume. Some small gains will be found midrange but 626 IM still pawns it.

I suppose the reason less people do this swap is that the FS-ZE is OBDI while the 2002+ are OBDII, meaning the loom and ecu (unless running aftermarket) also need to be sought to get it working correctly.

 

[tweety2300]

You can keep obd2 if you use an mp3 ecu but it won't run right and you'll have to swap out intake manifold