![Image](http://i219.photobucket.com/albums/cc76/Wumplife/xedos1992engine.jpg)
As you can see the intake manifold is different from B6DE.
So which is the reason of 7 hp gain?Intake design?
If one reason is fuel mapping,is there an option of swapping ecus?
If it was a B-series, sounds like it would of been based off the Miata B6, which involves a few more upgrades than ECU and IntakeFP
The 1.8 L (1839 cc) FP is a destroked version of the FS, with an 83 mm bore and 85 mm stroke. It produces 122 hp (91 kW) and 120 ft·lbf (163 N·m). This engine is often incorrectly called the F8, which is the earlier destroked engine based on the FE. The FP enjoys a much better power band vs the FS due to slightly different camshafts and a better rod ratio over the regular FS-DE.
The FP is very close to the FS in many ways and shares a large percentage of parts but has its own FP specific block, crank, rods, pistons and timing belt. The pistons for the FS produce a compression ratio of 9.1:1 (USDM) but when FP pistons are used in the FS they yield 9.7:1 compression ratio.
Applications:
1992–1993 Eunos 500
1997–2001 Mazda Capella
1999–2000 Mazda Protegé (ES models only)
1998-2003 Mazda 323 Astina & Protege (Australia)
1.6 L (1,597 cc) B6ZE(RS) - (78x83.6 mm) - Developed for the Mazda Miata (1989–93). The engine uses a DOHC 16-valve alloy head with a lightened crankshaft and flywheel to allow a 7,200 rpm redline. An aluminum sump with cooling fins is an unusual feature of this engine. The Japanese version of the engine had a 9.4:1 compression ratio and produced 120 hp (90 kW) and 100 lb·ft (136 N·m).
I guess that would be the correct term.Ryan wrote:Also, that motor in top pic uses coil packs.... iiinteresting....