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Maruha Motors Original Crankshafts for NA8C NB8C
The Maruha Motors Original Crankshafts for NA8C NB8C are available for an 85mm stroke or an 87mm stroke.
Maruha Motors - Original Crankshafts for NA8C NB8C
Maruha Motors - Original Crankshafts for NA8C NB8C
The Maruha Motors Original Crankshafts for NA8C NB8C are available for an 85mm stroke or an 87mm stroke. Since the Mazda OEM part number was discontinued a few years ago, Maruha Motors created these improved crankshafts.
Features
- Improved design over the original
- Over 1kg lighter than the genuine one. Improvement of response is expected.
- The stroke of genuine crankshaft is 85mm.The length from the center of crankshaft to the pin journal is 42.5mm.Therefore, the stroke distance of round trip between up and down becomes 85mm. The stroke length of 87m (43.5mm x 2) Maruha original crankshaft is also available. If you need standard overhaul, Maruha Motors recommend you use 85mm type of Maruha original crankshaft as same as the genuine stroke. If you need exhaust displacement increasing, 87mm typed Maruha original crankshaft is recommended.
- How to use 87mm strokes:
- The radius of gyration with 87mm typed Maruha original crankshaft is 1mm longer than the genuine one.
- In case of using 87mm typed Maruha original crankshaft with the genuine pistons and connecting rods, the top position of piston (top dead center timing) is 1mm protruded than the genuine one.
- Using the +1mm thicker gasket is easily adapted to this 1mm protrusion of the top position of piston.
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| Vehicle | Part | Price | Order |
|---|---|---|---|
| mar20110085 | |||
| Eunos Roadster - NA8C | Crankshaft for BP 85mm stroke | | |
| mar20110087 | |||
| Eunos Roadster - NA8C | Crankshaft for BP 87mm stroke | | |
| mar20110085 | |||
| Roadster - NB8C | Crankshaft for BP 85mm stroke | | |
| mar20110087 | |||
| Roadster - NB8C | Crankshaft for BP 87mm stroke | | |
About Maruha Motors
Maruha Motors is a Mazda Roadster (MX-5 Miata) specialist shop in Aoi-ku, Shizuoka. Maruha Motors develops its own original parts, among them soft tops, ESTER27 engine oil and an air-conditioning kit.
The Maruha range covers the NA, NB, NC and ND Roadster, from engine and suspension parts to brakes, exhausts and interior items, and also includes a RAPiD module for the Suzuki Jimny.
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About Nengun Performance
Since the year 2000, Nengun Performance has supplied over 500,000 parts direct from Fukuoka, Japan to 170 countries worldwide. If you have any questions, our experienced and friendly customer service team is always happy to help, please send us an enquiry.
