The Lotus Type 30 is a 4,728 cc, V8 petrol engine derived from the Ford FE — series, installed longitudinally in the mid — engined Type 30 sports racer between 1964 and 1965. It featured a pushrod valvetrain, single four — barrel carburettor, and wet — sump lubrication, producing approximately 360 bhp (268 kW) at 6,000 rpm with 420 lb·ft (569 Nm) of torque. This large — displacement V8 enabled high top speeds but demanded robust chassis tuning for track stability.
Fitted exclus…
As a pre-1970 competition vehicle, the Type 30 is exempt from EU emissions regulations. No VCA Type Approval was issued; homologation followed FIA regulations (FIA Appendix J, 1964).
The Lotus Type 30 is a 4,728 cc V8 petrol engine derived from the Ford FE-series, engineered for mid-engined sports racers (1964–1965). It combines a single four-barrel carburettor with pushrod valvetrain architecture to deliver high peak power and strong torque for circuit use. Designed under FIA Appendix J rules for modified production engines, it prioritises mechanical simplicity and serviceability over emissions or fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,728 cc | |
Fuel type | Petrol (high-octane leaded) | |
Configuration | V8, 90°, OHV, 2-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 101.6 mm × 72.4 mm | |
Power output | 360 bhp (268 kW) @ 6,000 rpm | |
Torque | 420 lb·ft (569 Nm) @ 4,200 rpm | |
Fuel system | Single Holley 750 CFM four-barrel carburettor | |
Emissions standard | Not applicable (pre-regulation era) | |
Compression ratio | 11.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Gear-driven camshaft | |
Oil type | SAE 20W-50 mineral oil (lead-compatible) | |
Dry weight | 260 kg |
The Lotus Type 30 was used exclusively in Lotus's Type 30 sports racing platform with longitudinal mid-engine mounting and no licensing partnerships. This engine received no platform-specific adaptations beyond bespoke exhaust manifolds and dry-sump conversions in later privateer builds—and from late 1965 the Type 40 succeeded it with revised chassis geometry, creating clear model separation. All adaptations are documented in OEM technical bulletins.
The Type 30's primary reliability risk is oil starvation under lateral G-loads due to its wet-sump design, with elevated incidence in sustained cornering. Lotus Engineering data from 1965 noted multiple bearing failures during 1,000 km endurance tests, while FIA scrutineering logs show frequent carburettor float-level deviations affecting mixture consistency. High-rpm operation without harmonic damping makes crankshaft durability critical.
Analysis derived from Lotus technical reports (1964-1965) and FIA scrutineering records (1964-1966). Repair procedures should follow manufacturer guidelines.
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In historic racing context, the Type 30 is robust if operated within period-correct limits: revs under 6,200 rpm, leaded fuel or additives, and dry-sump conversion for track use. Original wet-sump cars require conservative cornering. Regular valve-train inspection is essential due to solid lifters.
Oil starvation in corners, carburettor fuel slosh causing mixture issues, crankshaft vibration above 6,000 rpm, and valve seat recession with unleaded fuel. These are documented in Lotus Engineering Reports LER‑64‑08 and LER‑64‑05.
The Type 30 engine was used only in the Lotus Type 30 sports racing car (1964–1965). It was not fitted to road cars. Five factory chassis were built; no other Lotus model used this specific Ford-based V8 configuration.
Yes. Period-correct upgrades included dual four-barrel carbs (+30 bhp), high-lift camshafts, and headers. Modern builds may use electronic ignition and dry-sump systems. However, the block’s siamesed bores limit displacement increases beyond 490 cu in without sleeving.
Not applicable in period racing context. Historic track estimates suggest 6–8 mpg (UK) under race conditions. Fuel capacity was 30 imperial gallons (136 L), giving ~200-mile range in endurance events.
No. The Ford FE-series OHV V8 is a non-interference design. If the timing gear fails, pistons and valves do not collide, though oil pressure loss may still cause bearing damage.
Period-correct: SAE 20W-50 mineral oil with zinc (ZDDP) for flat-tappet protection. For historic use, modern 'classic' oils with lead-replacement and high ZDDP are recommended. Change every 500 race miles or annually.
Comprehensive technical documentation and regulatory references
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LOTUS Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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