| Description | Date | Identifier | |
| Performance comparison graph for two different vertical SU carburettor distribution setups. | 11th Dec 1931 | Box 102 \ 1 scan0063 | |
| Blueprints and parts for the 'Japan III' project, covering cylinder, inlet pipes, carburetter, and silencer sections. | 11th Dec 1931 | Box 102 \ 1 scan0064 | |
| Parts list for engine induction and carburettor systems, continued from a previous page. | 11th Dec 1931 | Box 102 \ 1 scan0065 | |
| The readiness of fixed choke carburettors for fitment to a 16-G-IV unit, with an attached power curve from a Japan 1 unit. | 14th Dec 1931 | Box 102 \ 1 scan0066 | |
| Performance graph showing power output for a 'Japan Unit' engine with specific modifications to cams, rockers, and valves. | 12th Dec 1931 | Box 102 \ 1 scan0067 | |
| Requesting the replacement of a blueprint due to an error in the title. | 14th Dec 1931 | Box 102 \ 1 scan0068 | |
| Performance graph plotting engine power output, pressure, and induction against RPM for a specific component setup. | 8th Jan 1932 | Box 102 \ 1 scan0069 | |
| Modifications and testing of a 25 HP carburetter. | 8th Jan 1932 | Box 102 \ 1 scan0070 | |
| Preliminary test results for a larger choke carburetter on a 20/25HP car. | 15th Jan 1932 | Box 102 \ 1 scan0071 | |
| The effects of using a heavy air valve on carburetter performance and idling. | 29th Feb 1932 | Box 102 \ 1 scan0072 | |
| Features and development of various carburettors for the Phantom model. | 29th Feb 1932 | Box 102 \ 1 scan0073 | |
| Fuel consumption and engine valve timing specifications. | 3rd Mar 1932 | Box 102 \ 1 scan0074 | |
| Difficulties with new carburettors and the merits of single versus dual carburettor systems. | 3rd Mar 1932 | Box 102 \ 1 scan0075 | |
| Comparison of carburetter configurations for Continental Phantom & 25HP models, weighing performance, cost, and complexity. | 5th Mar 1932 | Box 102 \ 1 scan0076 | |
| List of modifications and specifications for LeC.2924 carburetters. | 1st Apr 1932 | Box 102 \ 1 scan0077 | |
| Carburetter design for J. 3 and Peregrine engines. | 14th Apr 1932 | Box 102 \ 1 scan0078 | |
| Issues with carburettors sticking during slow running, suggesting a cause related to a washer causing distortion. | 13th May 1932 | Box 102 \ 1 scan0079 | |
| List of eight modifications and checks for carburettor and throttle systems. | 9th May 1932 | Box 102 \ 1 scan0080 | |
| Continuous trouble with carburetter throttles sticking during slow running due to distortion and thermal expansion. | 13th May 1932 | Box 102 \ 1 scan0081 | |
| List of modifications and fixes relating to throttle, carburettor, and induction system issues. | 9th May 1932 | Box 102 \ 1 scan0082 | |
| Cover note for an attached list of modifications to LeC.2924 carburetters. | 20th May 1932 | Box 102 \ 1 scan0083 | |
| List of modifications for LeC. 2924 carburettors. | 20th May 1932 | Box 102 \ 1 scan0084 | |
| Performance of fixed throat carburetters and proposing future developments for continental models. | 30th May 1932 | Box 102 \ 1 scan0085 | |
| Continued memorandum outlining objections to the SU carburetter compared to fixed adjustment alternatives. | 30th May 1932 | Box 102 \ 1 scan0086 | |
| Decision to abandon the use of double carburetters on the J.I. model. | 17th Jun 1932 | Box 102 \ 1 scan0087 | |
| The design and fitment alteration for a J.3. Semi-Expanding Carburetter. | 30th Jun 1932 | Box 102 \ 1 scan0088 | |
| The design and part interchangeability of the expanding carburettor for the J.III chassis, comparing it with the Phantom II model. | 6th Jul 1932 | Box 102 \ 1 scan0089 | |
| Loss of effective mixture control with the semi-automatic carburetter. | 16th Jul 1932 | Box 102 \ 1 scan0090 | |
| Fuel consumption and the mixture strength control for the J.3. & Peregrine carburetter. | 31th Aug 1932 | Box 102 \ 1 scan0091 | |
| Modifications to a mixture lever and its quadrant markings following the deletion of a carburetter governor. | 3rd Oct 1932 | Box 102 \ 1 scan0092 | |
| Instruction to build a 25 HP Tank Carburetter for test bed purposes. | 1st Nov 1932 | Box 102 \ 1 scan0093 | |
| General report on the development and testing of carburettor intake silencers. | 28th Nov 1932 | Box 102 \ 1 scan0094 | |
| The design of an A.C. Silencer for a 5-litre engine, including a diagram and notes on tuning methods. | 28th Nov 1932 | Box 102 \ 1 scan0095 | |
| Tests for a carburetter air intake silencer, comparing alternatives to eliminate induction roar. | 28th Nov 1932 | Box 102 \ 1 scan0096 | |
| Test report comparing the performance of different intake silencer designs and configurations. | 28th Nov 1932 | Box 102 \ 1 scan0097 | |
| Recommending an intermediate size of silencer for the induction pipe, with an attached photograph. | 28th Nov 1932 | Box 102 \ 1 scan0098 | |
| Blueprint detailing designs and performance data for PII Resonance Silencers for a Semi Expanding Carburetter. | 28th Nov 1932 | Box 102 \ 1 scan0099 | |
| Blueprint detailing two designs for Phantom II intake resonance silencers for a semi-expanding carburetter. | 28th Nov 1932 | Box 102 \ 1 scan0100 | |
| Blueprint showing diagrams and specifications for two types of American intake silencers for Chrysler and Nash vehicles. | 28th Nov 1932 | Box 102 \ 1 scan0101 | |
| Blueprint showing the design of a typical A.C. silencer for a 5-litre car. | 2nd Jan 1933 | Box 102 \ 1 scan0102 | |
| Tests conducted on an air intake silencer for a 25 HP car. | 2nd Jan 1933 | Box 102 \ 1 scan0103 | |
| The development and testing of an adjustable air silencer, including a dimensioned sketch. | 3rd Jan 1933 | Box 102 \ 1 scan0104 | |
| Modifying the air silencer on the 20/25 HP model to regain lost power. | 3rd Jan 1933 | Box 102 \ 1 scan0105 | |
| Performance curves for a 20/25 HP engine with various tank carburetter configurations and timing diagram. | 14th Dec 1932 | Box 102 \ 1 scan0106 | |
| Request to put in hand two further sets of J.III carburettors and associated pipes. | 3rd Jan 1933 | Box 102 \ 1 scan0107 | |
| Additional feature for the J.2 and Phantom II semi-expanding carburetters to prevent air leakage. | 3rd Jan 1933 | Box 102 \ 1 scan0108 | |
| The testing, modification, and standardization of a 25 HP carburetter with an air silencer. | 4th Jan 1933 | Box 102 \ 1 scan0109 | |
| Re-designed throttle edge adjustment for semi-expanding carburetters on Phantom II and J.2 models. | 16th Jan 1933 | Box 102 \ 1 scan0110 | |
| Carburetor testing and troubleshooting for a J.II engine unit. | 30th Jan 1933 | Box 102 \ 1 scan0111 | |
| Line and scatter plot graph comparing 'Ideal' and 'Actual' results, with a condition noted as 'Passage Blocked'. | 13th Feb 1933 | Box 102 \ 1 scan0112 | |
| Request to build and fit an air silencer and cleaner for a 25 HP carburetter. | 13th Feb 1933 | Box 102 \ 1 scan0113 | |
| Testing of an air silencer on a 25 HP car, noting an issue with excessive oil consumption. | 16th Mar 1933 | Box 102 \ 1 scan0114 | |
| Performance graph of Horsepower vs R.P.M. comparing a standard silencer with an experimental silencer. | 15th Mar 1933 | Box 102 \ 1 scan0115 | |
| Modified crankcase breather and flame trap gauze for the 20-HP Resonance Air Silencer. | 25th Mar 1933 | Box 102 \ 1 scan0116 | |
| Two new designs of copper gauze air cleaners for 20-HP and Phantom II models. | 28th Mar 1933 | Box 102 \ 1 scan0117 | |
| Tests on air silencers for 25 HP & Phantom II cars to investigate and resolve excessive oil consumption. | 30th Mar 1933 | Box 102 \ 1 scan0118 | |
| Oil consumption issues and breather pipe modifications on Phantom II cars. | 30th Mar 1933 | Box 102 \ 1 scan0119 | |
| Blueprint showing a modification to the breather connection on a Phantom II crankcase. | 30th Mar 1933 | Box 102 \ 1 scan0120 | |
| With a blueprint showing modifications to a silencer for a test to increase power output. | 4th Apr 1933 | Box 102 \ 1 scan0121 | |
| Request for parts and modifications for a J.III No.2 test unit carburettor. | 31th May 1933 | Box 102 \ 1 scan0122 | |
| Design for a clean air supply to a 20/25 HP tank carburetter to prevent grit ingress. | 2nd Aug 1933 | Box 102 \ 1 scan0123 | |
| Customer complaint of 'spitting in exhaust' on the 20/25 chassis on retard. | 26th Aug 1933 | Box 102 \ 1 scan0124 | |
| Carburettor performance and a spitting exhaust issue on a 25 HP chassis. | 31th Aug 1933 | Box 102 \ 1 scan0125 | |
| Modification to the 20/25 Chassis Carburetter Air Valve to prevent dust ingress. | 11th Sep 1933 | Box 102 \ 1 scan0126 | |
| Proposed modification to the carburetter air valve on a 20/25 HP chassis. | 12th Sep 1933 | Box 102 \ 1 scan0127 | |
| Requesting a modification to the 20/25 HP carburetter. | 13th Sep 1933 | Box 102 \ 1 scan0128 | |
| Reporting on the road test results of a modified carburetter air valve for a 20/25 HP chassis. | 29th Sep 1933 | Box 102 \ 1 scan0129 | |
| The performance of a 1 5/8 S.U. carburetter on a 20/25 HP engine. | 8th Oct 1935 | Box 102 \ 1 scan0130 | |
| Standardisation report for a modified carburetter and air silencer to reduce noise. | 4th Jan 1933 | Box 102 \ 1 scan0131 | |
| Implementation specifications and costs for a new chassis part. | 13th May 1933 | Box 102 \ 1 scan0132 | |
| Confirming the dispatch of a blueprint for a 20/25 HP 1-5/8' Horizontal Carburetter. | 4th Nov 1933 | Box 102 \ 1 scan0133 | |
| Comparative tests for an improved carburetter on a 25 HP car to increase performance and fix banging in the silencer. | 7th Nov 1933 | Box 102 \ 1 scan0134 | |
| Arranging a meeting at Bignall's Corner to test a 25 HP Demonstration car. | 8th Nov 1933 | Box 102 \ 1 scan0135 | |
| Arranging a meeting for carburetter tests on a 25 HP vehicle. | 9th Nov 1933 | Box 102 \ 1 scan0136 | |
| Request to prepare a test bed for a new carburetter designed for the 20/25 HP engine. | 9th Nov 1933 | Box 102 \ 1 scan0137 | |
| New 20/25 HP carburetter, focusing on petrol consumption, production status, and the need for comparative tests. | 11th Nov 1933 | Box 102 \ 1 scan0138 | |
| Drawing LeC.3694, showing the air intake silencer for a 1-5/8' horizontal carburetter on a 20/25 HP model. | 15th Nov 1933 | Box 102 \ 1 scan0139 | |
| The dispatch of a horizontal carburetter for a 20/25 HP vehicle. | 15th Nov 1933 | Box 102 \ 1 scan0140 | |
| New 20/25 HP Horizontal Carburetter, referencing associated drawings for controls. | 15th Nov 1933 | Box 102 \ 1 scan0141 | |
| Carburettor tests for the 20/25 HP model, comparing an experimental LU carburettor with the standard one. | 28th Nov 1933 | Box 102 \ 1 scan0142 | |
| Experiments on the 20/25 carburetter air valve and proposing a modification to prevent it from sticking. | 7th Dec 1933 | Box 102 \ 1 scan0143 | |
| Modified 20/25 HP carburetter designed to prevent the air valve from sticking and arranging its fitment to chassis 20-G-IV. | 15th Jan 1934 | Box 102 \ 1 scan0144 | |
| Request for a modification to fit a 20/25 Horizontal Carburetter LEC.3688 to a standard engine. | 17th Jan 1934 | Box 102 \ 1 scan0145 | |
| Arranging to fit a modified carburettor to car 20-G4 to prevent a sticking air valve. | 16th Jan 1934 | Box 102 \ 1 scan0146 | |
| Instruction to prepare a second 25 HP Air Valve Piston for use on chassis 19-G-IV. | 8th Feb 1934 | Box 102 \ 1 scan0147 | |
| The demonstration and usefulness of a Cambridge Exhaust Gas Analyser for engine testing. | 1st Jan 1934 | Box 102 \ 1 scan0148 | |
| Reprint from 'The Automobile Engineer' on the Cambridge Exhaust-Gas Analyser for determining mixture strengths. | 1st Jan 1934 | Box 102 \ 1 scan0149 | |
| The principles of operation and features of the Cambridge exhaust-gas tester. | 18th Jan 1934 | Box 102 \ 1 scan0150 | |
| Performance and acceleration figures comparing two different carburettor types. | 13th Feb 1934 | Box 102 \ 1 scan0151 | |
| Issues of sticking air valves and exhaust explosions on the 20/25 HP model. | 15th Feb 1934 | Box 102 \ 1 scan0152 | |
| Two proposed schemes to fix sticking air valves on the 20/25 HP car. | 15th Feb 1934 | Box 102 \ 1 scan0153 | |
| Modifications required for the 20/25 Horizontal Carburetter. | 28th Feb 1934 | Box 102 \ 1 scan0154 | |
| Request to borrow a complete 20/25 petrol system to carry out tests on a new horizontal carburettor. | 10th Mar 1934 | Box 102 \ 1 scan0155 | |
| Tests of the 20/25 Autovac petrol supply system with a new horizontal carburetter. | 13th Mar 1934 | Box 102 \ 1 scan0156 | |
| Graph of Autovac fuel supply tests, plotting delivery vs. consumption and time to empty against engine RPM. | 15th Mar 1934 | Box 102 \ 1 scan0157 | |
| Modifications to a new horizontal carburettor for the 20/25 model. | 15th Mar 1934 | Box 102 \ 1 scan0158 | |
| Request for the production of a modified suction piston for a 20/25 horizontal carburettor. | 26th Mar 1934 | Box 102 \ 1 scan0159 | |
| The 1 1/2' Horizontal Carburetter for the 20/25 model and its modifications. | 29th Mar 1934 | Box 102 \ 1 scan0160 | |
| Urgent memo regarding a 1½' Horizontal Carburetter for a 20/25 HP test car. | 4th Apr 1934 | Box 102 \ 1 scan0161 | |
| The testing and implementation of new 20/25 HP carburetter air valves. | 7th Apr 1934 | Box 102 \ 1 scan0162 | |
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