| Description | Date | Identifier | |
| Graph comparing engine performance (B.M.E.P vs R.P.M) for different inlet and exhaust valve durations. | 12th Jun 1931 | Box 13 \ 2 02-page096 | |
| Blueprint graph comparing engine performance (B.HP vs R.P.M.) with associated valve timing diagrams. | 12th Jun 1931 | Box 13 \ 2 02-page097 | |
| Performance graph for a Phantom II engine with a twin carburettor, 110° camshaft, 4.9 compression ratio and open exhaust. | 12th Jun 1930 | Box 13 \ 2 02-page098 | |
| Performance graph comparing a large valve cast iron head with a standard aluminum head on a PI unit. | 12th Jun 1930 | Box 13 \ 2 02-page099 | |
| Performance graph of a PI unit comparing a large valve cast iron head with a standard valve aluminium head. | 12th Jun 1931 | Box 13 \ 2 02-page100 | |
| Comparative table of engine valve specifications for various car models. | 17th Jun 1931 | Box 13 \ 2 02-page101 | |
| Tests on 40/50 camshafts, valve timing, and large diameter inlet valves. | 17th Jun 1931 | Box 13 \ 2 02-page102 | |
| Engine valve timing, lift, and camshaft modifications. | 17th Jun 1931 | Box 13 \ 2 02-page103 | |
| Blueprint graph comparing different engine timing configurations found by experiment. | 17th Jun 1931 | Box 13 \ 2 02-page104 | |
| Blueprint graph comparing the performance of large versus small valves. | 17th Jun 1931 | Box 13 \ 2 02-page105 | |
| Blueprint showing desirable camshaft timing diagrams for the 40/50 model. | 18th Jun 1931 | Box 13 \ 2 02-page106 | |
| Modifications to the rockers to increase the valve lift for a 40/50 model. | 18th Jun 1931 | Box 13 \ 2 02-page107 | |
| Timing and camshaft modifications on the Phantom II and 25 HP models, detailing power curve increases. | 22th Jun 1931 | Box 13 \ 2 02-page108 | |
| Desire to produce a new higher lift camshaft for the P.2 engine. | 23th May 1931 | Box 13 \ 2 02-page109 | |
| Technical memorandum discussing tests and comparisons of engine timing and camshaft performance, with timing diagrams. | 24th Jun 1931 | Box 13 \ 2 02-page110 | |
| Camshaft design alterations to improve engine performance and valve timing. | 24th Jun 1931 | Box 13 \ 2 02-page111 | |
| Performance comparison graph of 110° and 114° camshaft timings, showing B.H.P and B.M.E.P against R.P.M. | 24th Jun 1931 | Box 13 \ 2 02-page112 | |
| Performance graph showing Brake Horse Power and Brake Mean Effective Pressure against RPM for specific engine timings and configurations. | 6th Jul 1931 | Box 13 \ 2 02-page113 | |
| Progress and fitting of a new camshaft for a Phantom II engine. | 6th Jul 1931 | Box 13 \ 2 02-page114 | |
| Data tables comparing valve train component specifications and performance characteristics for the 25HP.JAPAN engine. | 27th Sep 1931 | Box 13 \ 2 02-page115 | |
| Technical memo discussing the effects of a long duration camshaft on engine performance. | 21th Jul 1931 | Box 13 \ 2 02-page116 | |
| Request to manufacture two modified camshafts to test increased power output. | 21th Jul 1931 | Box 13 \ 2 02-page117 | |
| Diagram showing the arrangement and profiles for a PII left-hand inlet and exhaust camshaft. | 30th Jul 1931 | Box 13 \ 2 02-page118 | |
| Technical drawing of a masked inlet seat component for the PII model. | 21th Jul 1931 | Box 13 \ 2 02-page119 | |
| Test report on the High Power Camshaft P.II, comparing its performance against a 25 HP engine. | 5th Aug 1931 | Box 13 \ 2 02-page120 | |
| Engine performance improvements via tests on valve lift ratios, cam angles, and camshaft designs. | 5th Aug 1931 | Box 13 \ 2 02-page121 | |
| Tabulated list comparing valve opening specifications across various engine types. | 5th Aug 1931 | Box 13 \ 2 02-page122 | |
| Performance graph showing engine power output and induction pipe depression against RPM for a long duration camshaft test. | 5th Aug 1931 | Box 13 \ 2 02-page123 | |
| Performance graph showing the effect of increasing valve lift on a China engine. | 5th Aug 1931 | Box 13 \ 2 02-page124 | |
| Performance graph showing the effect of increased valve lift on the 'Japan Engine'. | 5th Aug 1931 | Box 13 \ 2 02-page125 | |
| Performance and silencing of the West Wittering 120° camshaft for the P.2 engine. | 5th Aug 1931 | Box 13 \ 2 02-page126 | |
| Power curves and valve timing diagrams for a Phantom II engine, comparing three different camshaft specifications. | 6th Aug 1931 | Box 13 \ 2 02-page127 | |
| Instruction to experimentally test a 5 1/4 - 1 compression ratio on the P.2 engine with a long duration camshaft. | 6th Aug 1931 | Box 13 \ 2 02-page128 | |
| The results of tests on 114° camshafts and valve timing. | 26th Aug 1931 | Box 13 \ 2 02-page129 | |
| Blueprint graph comparing performance characteristics for various camshaft timings. | 21th Aug 1931 | Box 13 \ 2 02-page130 | |
| Performance comparison graph for 120° and 114° camshafts. | 21th Aug 1931 | Box 13 \ 2 02-page131 | |
| Record of a telephone conversation regarding camshaft specifications for 20/25 HP, Phantom II, and Continental Phantom II models. | 4th Sep 1931 | Box 13 \ 2 02-page132 | |
| Power output tests for the Phantom II engine, analysing the effects of camshaft and inlet valve modifications. | 18th Sep 1931 | Box 13 \ 2 02-page133 | |
| Technical memorandum discussing the effect of different valve sizes, camshafts, and carburetter settings on engine power. | 1st Sep 1931 | Box 13 \ 2 02-page134 | |
| Summary of conclusions on car engine performance, focusing on valve timing, cam design, and valve specifications. | 28th Sep 1931 | Box 13 \ 2 02-page135 | |
| Performance graph comparing a twin carburettor induction system with a standard A1 carburettor system. | 20th Jan 1931 | Box 13 \ 2 02-page136 | |
| Performance graph comparing large and small valves. | 26th Aug 1931 | Box 13 \ 2 02-page137 | |
| Performance graph comparing different valve lift timings and settings against engine RPM. | 9th Aug 1931 | Box 13 \ 2 02-page138 | |
| Graph comparing engine performance using high lift rockers with different valve lifts and carburettors. | 9th Aug 1931 | Box 13 \ 2 02-page139 | |
| Graph showing the effect of increased valve lift on engine performance at various RPMs. | 9th Aug 1931 | Box 13 \ 2 02-page140 | |
| Graph comparing engine performance based on various inlet valve durations and lift profiles. | 9th Aug 1931 | Box 13 \ 2 02-page141 | |
| Performance graph comparing valve sizes and carburetor setups for a Phantom II engine unit with an open exhaust. | 31th Oct 1931 | Box 13 \ 2 02-page142 | |
| Interpretation of performance curves for masked inlet valves based on different timings. | 31th Oct 1931 | Box 13 \ 2 02-page143 | |
| Use of long-toed cams to manage tappet clearance for engine silencing. | 19th Nov 1931 | Box 13 \ 2 02-page144 | |
| Tests on engine tappet clearance and the resulting noise levels. | 24th Nov 1931 | Box 13 \ 2 02-page145 | |
| Graph showing the effect of increased valve lift on a standard camshaft and cylinder head. | 24th Nov 1931 | Box 13 \ 2 02-page146 | |
| Blueprint drawing for an inlet valve with dimensional tolerances. | 5th Oct 1931 | Box 13 \ 2 02-page147 | |
| Proposed Brooklands test to compare camshaft and compression ratio improvements on the Continental P.2. car. | 5th Oct 1931 | Box 13 \ 2 02-page148 | |
| Power output difference between balanced and unbalanced twin carburettors. | 2nd Oct 1931 | Box 13 \ 2 02-page149 | |
| Graph comparing the power output of balanced versus unbalanced twin carburettors. | 29th Oct 1931 | Box 13 \ 2 02-page150 | |
| The results of tests conducted on masked inlet valves. | 29th Oct 1931 | Box 13 \ 2 02-page151 | |
| Report page discussing the results of engine testing related to valve lift, clearance, and horsepower. | 29th Oct 1931 | Box 13 \ 2 02-page152 | |
| Performance comparison chart of masked versus unmasked camshafts with different lift rockers. | 29th Oct 1931 | Box 13 \ 2 02-page153 | |
| Performance comparison graph of a 112° masked camshaft and a 114° unmasked camshaft, plotting B.M.E.P. against R.P.M. | 2nd Dec 1931 | Box 13 \ 2 02-page154 | |
| Results of exhaust system loss tests conducted using a 114° camshaft. | 2nd Dec 1931 | Box 13 \ 2 02-page155 | |
| Performance graph comparing manifold only, cut-out open, and full exhaust systems. | 30th Nov 1931 | Box 13 \ 2 02-page156 | |
| Analysis of a short type exhaust system, comparing performance with different components. | 30th Nov 1931 | Box 13 \ 2 02-page157 | |
| Summary of two development tests carried out on a 114° camshaft. | 7th Jan 1941 | Box 13 \ 2 02-page158 | |
| Performance graph comparing a 114° camshaft with a twin inlet cam and camshaft configuration. | 27th Nov 1931 | Box 13 \ 2 02-page159 | |
| Performance graph comparing high and low lift rockers on a 114° Camshaft E 82448. | 28th Nov 1931 | Box 13 \ 2 02-page160 | |
| Engine power development, focusing on valve timing, lift, and supercharger application. | 9th Jan 1932 | Box 13 \ 2 02-page161 | |
| Technical memorandum discussing cam forms and valve timing for J.III and Peregrine engines, comparing theoretical values with test results and Alfa Romeo designs. | 18th Apr 1932 | Box 13 \ 2 02-page162 | |
| Summary of existing camshafts for various engine models showing their timing and duration. | 18th Apr 1932 | Box 13 \ 2 02-page163 | |
| Blueprint comparing three cam forms and four alternative engine valve timings. | 18th Apr 1932 | Box 13 \ 2 02-page164 | |
| Standardisation of a 114º long duration camshaft with stronger tappet springs. | 6th Sep 1932 | Box 13 \ 2 02-page165 | |
| Standardisation of chassis parts form. | 26th Nov 1932 | Box 13 \ 2 02-page166 | |
| Optimal timing specifications for a new camshaft, part number E.82448 1140, including a timing diagram. | 13th Dec 1932 | Box 13 \ 2 02-page167 | |
| Request to manufacture two types of camshafts for the 40/50 model. | 17th Mar 1933 | Box 13 \ 2 02-page168 | |
| Blueprint detailing the cam lift specifications and dimensions for an 8 Litre Phantom camshaft. | 17th Mar 1933 | Box 13 \ 2 02-page169 | |
| Cause and proposed solution for a camshaft squawk on the Phantom II engine. | 9th Oct 1933 | Box 13 \ 2 02-page170 | |
| Modification to a tappet fork to address camshaft squawks, re-issuing a related document and referencing a previous memo. | 8th Dec 1933 | Box 13 \ 2 02-page171 | |
| Cause and potential solution for knocks in Phantom II engines. | 16th Dec 1933 | Box 13 \ 2 02-page172 | |
| Technical memo proposing a reduction in the camshaft end clearance for the Phantom II and other chassis. | 18th Dec 1933 | Box 13 \ 2 02-page173 | |
| Feasibility and testing of a balancing cam for the Phantom II car. | 5th Jan 1934 | Box 13 \ 2 02-page174 | |
| Accuracy of camshaft manufacture, suggesting the measurement of a specific cam form to check for inaccuracies. | 20th Jun 1934 | Box 13 \ 2 02-page175 | |
| Issues with a No. 4 inlet valve and requesting a new camshaft for a Ph.II engine. | 25th Jun 1934 | Box 13 \ 2 02-page176 | |
| Requesting a new camshaft with corrected forms for two cams following tests on hydraulic tappets. | 5th Sep 1934 | Box 13 \ 2 02-page177 | |
| Standardisation of parts for the old camshaft to E.80070 to increase valve gear silence. | 26th Sep 1934 | Box 13 \ 2 02-page178 | |
| Nil estimated cost of extra jigs, tools, and equipment for a specific instruction. | 26th Sep 1934 | Box 13 \ 2 02-page179 | |
| Graph of Brake Mean Effective Pressure curves comparing various Cadillac and Rolls-Royce products. | 26th Sep 1934 | Box 13 \ 2 02-page180 | |
| Scheme for carburettor mixture control and related ignition control revisions. | 6th Jul 1926 | Box 13 \ 3 03-page001 | |
| On the successful road and bed testing of new carburetter jets, designed to reduce manufacturing scrap. | 31th Mar 1927 | Box 13 \ 3 03-page002 | |
| Experimental induction pipe manifold arrangements for the revised Phantom engine. | 7th Jun 1927 | Box 13 \ 3 03-page003 | |
| Hand-drawn diagram illustrating two alternative connection schemes for a component. | 29th Dec 1927 | Box 13 \ 3 03-page004 | |
| Engine detonation using french petrol, pre-ignition and misfires. | 29th Dec 1927 | Box 13 \ 3 03-page005 | |
| Design and fitment of a Weir induction pipe for models EAC.14 and EAC.10. | 3rd Jan 1928 | Box 13 \ 3 03-page006 | |
| Proposed alterations and improvements to the EAC.7 model, including radiator design, engine suspension, and body mounting. | 9th Jan 1928 | Box 13 \ 3 03-page007 | |
| Technical memorandum discussing vehicle improvements related to throttle, suspension, carburettor, brakes, and bodywork. | 13th Jan 1928 | Box 13 \ 3 03-page008 | |
| Weir induction pipe and petrol head considerations for chassis EAC.14 and EAC.10. | 13th Jan 1928 | Box 13 \ 3 03-page009 | |
| The design of induction pipes and cylinder heads, discussing siamesed ports and comparing 4-port and 6-port arrangements. | 17th Jan 1928 | Box 13 \ 3 03-page010 | |
| Page discussing the application of an undertype slot for induction pipes, referencing a blueprint. | 7th Jan 1928 | Box 13 \ 3 03-page011 | |
| Design of weir vs. slot type induction pipes for the EAC.14 engine. | 7th Jan 1928 | Box 13 \ 3 03-page012 | |
| Alternative underfed slotted induction pipe for EAC.14 and testing considerations. | 21th Jan 1928 | Box 13 \ 3 03-page013 | |
| Relocation of the Autovac position. | 21th Jan 1928 | Box 13 \ 3 03-page014 | |
| Committing to a 6-port induction scheme over a 4-port arrangement. | 21th Jan 1928 | Box 13 \ 3 03-page015 | |
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