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A13 RACE ENGINE This engine was originally owned by Allan Pitt (SCUDERIA) . The engines were commonly used in Japan in mid seventies formula Pacific cars and were still being used in 1978 against the all conquering LZ14's. The engines produce approx 155 hp @ 10200 rpm in endurance trim and were used for Formula 3 and 1300 cc clubmans in Australia. Allan Pitt also used these engines in 1300 cc class sports sedan series with success. CLICK THE PICTURE TO ENLARGE VIEW |
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The block is Datsun A13, The cast alloy TOMEI sump has a scraper tray and extensive internal baffling. Camshaft is a Nissan works 80A |
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The A13 block is fitted with a 70mm stroke Tomei crank shaft. The crank shaft is kept in position with polished main bearing caps using 12mm hex head bolts. Timing chain is a Roll Master fitted to an adjustable cam sprocket for dialling in cam timing. |
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The connecting rods are titanium billets with hot metal sprayed oil retention grooves each side of the main and a bushed little end. The caps are aligned with roll pins and use SPS aircraft grade cap bolts. Each rod is 165 grams lighter than the standard 121 mm rod. |
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Pistons are Tomei forgings 76.76mm diameter with valve reliefs and fully floating pins. |
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Inlet ports are 40mm high and
32mm wide.
Exhausts are 30mm high & 28mm
wide. Head gasket is O-ring re-useable steel shim type. |
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Inlet valves are 40mm and exhausts 33mm. Valve stems are fitted with "Roto" caps. The combustion chambers are shaped to promote quick charge burn. All galleries are opened up for better coolant flow. |
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Valve springs are hand matched spring rate pairs. They are colour coded and held by titanium retainer caps. Light weight Cr-Mo pushrods are fitted. |
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June 2004 update. The head has been fitted with Australian made Yella Terra roller rockers 1.55 ratio. |
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Water pump drive is by Gilmer tooth belt. A mechanical tach drive is fitted to the end of the camshaft |