Over the past twenty years we have accumulated a vast knowledge of the lotus twin cam engine. While a 104 cam really needs higher compression to perform at its best, the 107 cam is at home with 8. Lotus the hole in the garage where you throw money. The exhaust pipe is full of soot and hard acceleration leaves a cloud worthy of james bond making a getaway i also got a later engine from an elite. The lotus ford twin cam is an inlinefour petrol engine developed by lotus for the 1962 lotus elan. Lotus esprit tuning guide, general care and restoration. Genuine and own brand, car spares, parts and accessories for lotus.
Lotus esprit tuning guide, general care and restoration torquecars. Torque loading specifications for lotus 907 and 912 series. If you do not know the part number, use the search boxes below. It was an original design, dual overhead cam, 16 valve all alloy powerplant. Visit our online store for the best prices and speedy shipping or call. Lotus engines lotus 900 series engine motor car history. Lotus 907 zero time since completely rebuilt by peter marcovicci of mwe balanced and blueprinted overbore. Ive recently acquired a jensenhealey with a very smokey lotus 907 engine in it. The gglc can not promise that this information is correct and the user should use this information as a possible alternative. Lotus genuine parts and spares lotus car spares, parts. Gearbox upgrade tackling the esprits achilles heel. The golden gate lotus club parts interchange is an compilation of information developed by gglc members and others to assist all lotus owners and enthusiasts.
To search the entire lotus part number database, do not select a model. The twin cam was used in a variety of vehicles until lotus stopped production in 1973. Since the inception of the golden gate lotus club, members and friends have shared their technical knowledge and experience with other lotus enthusiasts. I plan on stripping it down, rebuilding it over the next couple. Weve collected hundreds of articles from past chapman report gglc newsletter articles and links that can assist nearly every lotus owner with a vast bank of technical knowledge that will. Its beneficial for a commuter 907, just dont get your expectations out of proportion. Section tda technical data, a covers the naturally aspirated 907 912 engines, and tdb covers the carbturbo 910s. Lotus 907 carb recomendation page 1 esprit pistonheads. These first cars became known as series 1 or s1 esprits. The wedgeshaped fibreglass body was mounted on a steel backbone chassis. Im whipping the motor out of my s2 this christmas with the intention of replacing the exhaust manifold, cam belt and clutch and with the engine having covered 90k with no apparent work being carried out and a slight drop in compression on one cylinder, my thoughts have turned to. Lotus esprit tuning guide, general care and restoration more.
Engine rebuild with stromberg 175 cd sync and mixture adjustment. Gearshift improvement kit bring your gearshift back to life. Lotus tuning guide for more power and torque on track torquecars. It includes the carb data for those years plus all years prior for lotus carb9xx engines 1974 onward lotus, but not jh. It displaced 1973 cc and developed approximately 144 bhp 107 kw with dual sidedraft dellorto carburetors in most markets and zenith stromberg carburetors for us cars. The lotus 907 is an engine designed and manufactured for automotive applications by lotus. Find all the lotus 907, 910, 911, 912 components you need for your engine. Qed motorsport lotus twin cam, vauxhall c20xe, rover k. The type 907 was the first version of the 900 series to go into full production when it appeared in the jensenhealey in 1972. Identifying lotus 907 engine castings jensen h i got a complete jensen healey engine transmission plus, heads, cam boxes, block, crank, intake manifold, aluminum flywheel, cam covers, a transmission, a bell housing, a gear box casting no gears, and three oil pans.
Seems to run fine but for that problem and a bad miss when cold, due to oil fouled plugs. Modern engine computers ecus take over many of the controls of all aspects of engine. It is a great myth that rebuilding the lotus 907 engine found in the jensen healey is unduly and excessively expensive. An overview it is a great myth that rebuilding the lotus 907 engine found in the jensen healey is unduly and excessively expensive. The engine came out of a 78 elite, which it was going back in to. The lotus 907 engine, the first production version, was 2.
I have the jensen healey workshop manual as well as the dellorto specs for all the jh and lotus 907 912 configurations. Gas flowed and cnc machined, new valve guides, valve seats cut to match lotusbits designed waisted valves. The lotus 907 is an engine designed and manufactured for automotive applications by lotus cars. The esprit was launched in october 1975 at the paris motor show and entered production in june 1976, replacing the europa in the lotus model lineup. It is an allalloy inline4 engine with dual overhead camshafts dohc and 16 valves. It used a ford 116e iron cylinder block and a new aluminium cylinder head with dual overhead camshafts.
The jensenhealeys 907 evolved over the years and there were significant changes. Gglc lotus 907 engine part interchange cross reference. The best engines for the esprit tuner would arguably be the turbo editions but these are more prone to problems due to the extra stress the engine is under. The owner moved out west to a rural ranch and the elite is not readily convertible to 4 wheel drive. Remember to tick get notifications if you want to be notified of the latest news from lotus marques. From just supplying the parts to completing a full engine build and rolling road tuning, we can work with you to define the best package that suits your requirements and budget, so please give us a call and lets work together to give your lotus the performance it has always been crying out for. It began to appear in lotus cars in 1975 in the lotus elite and was later used in the lotus eclat and lotus esprit. Tcb 203 short jackshaft two bolt machined from a new iron blank, full diameter oiling tcb. Steel brothers limited attempted to make a wider, modernised version of the series 4, the lotus super 907, using the twin cam lotus 907 engine. Lotus 900 series performance cylinder heads and lotus 900 series engine upgrades. Good lotus elite 907 engine, tested lotus dhla carburretors and inlet manifold lotus elite full stainless steel exhaust system elite alternator elite starter motor elite 912 engine block. F2k kit the f2k kit consists of the essentials to install an f20c or f22c engine, paired with a kseries transmission f2k into the extremely popular 9401 integra, or a 9295 civic. There is only one way to make a good lotus engine and that is to build it properly, machine it properly and use good quality components and that is not always easy.
With that fixed, i finally tightened down the tie rod ends and set the alignment with a caster camber gauge and toe adapter. What books or printed sources are there for rebuilding these engines. Mixing and matching will result in very bad things when you try to set the timing. Refurbing translator a how to do guide nonlew website. We have been given the task of rebuilding this engine, it has been neglected for some te by the look of its general condition. Here at qed motorsport, we have over 40 years of experience developing, manufacturing and supplying race and performance engine tuning parts. Meticulous attention to detail and hours of hard work is the only way to make these engines a. Chamber volumes can be adjusted to suit from 32cc to 42cc. Tcb 202 front cover assembly, as above but taller for 711m and alloy block. Fseries swaps just got a whole lot easier honda tuning. The early and late lotus 907 engines have different crank pulleys and timing markers. It displaced 1973 cc and developed approximately 144 bhp 107 kw with dual sidedraft dellorto carburetors or horizontal zenith stromberg carburetors for us cars. Lotus decision to go ahead and produce its own engine thereby freeing. Unfollow lotus engine 907 to stop getting updates on your ebay feed.
During that 1972 thru 1980 time frame there were lots of running changes made to even the 2. We cater specifically to the lotus ford twin cam, lotus 900series, rover kseries, opel vauxhall xe c20xe and opel vauxhall ecotec x20xev, focusing on various forms of clubman motorsport. Now this guide isnt to show you how to rebuild an esprit engine, it would be too long and to detailed, and you really need a specialist to get it done right, unless you have lots of experience yourself. Start lotus 907 engine full rebuild jenssen healey youtube. The lotus 907 was an engine designed and manufactured for automotive applications by lotus cars. Engine removal 6 hrs, engine rebuild 42 hrs, refitting engine 6 hrs.
This will be part 1 of a series of videos for this job. The lotus 907 engine as it has come to be known has been used in many lotus s as well as other vehicle, its was developed at the beginning of the 70s based around the dimensions of a vauxhall engine but with an. The 907 motor was first released in 1972 1973 and was made through approximately 1980 when lotus first released the 2. I got these parts from a friend who is cleaning out his shed and wanted to.
The best jensen healey lotus 907 engine modifications. Find all the rover kseries components you need for your engine. One advantage the 107s milder timing gives it is that its compatible with the stock 907 engines lower compression remember the three cs. Especially when it comes to nonstandard performance tuning. For a full history and insight into the lotus twin cam engine read miles wilkins book the lotus twin cam engine if you can find a copy.
In the spring of 1978 it was announced that this was to be sold in the united states 11 but the american importer had. This is the most comprehensive efi tuning and calibration book available and that is why it has sold in 36 countries worldwide and is used as the efi tuning text book by technical schools such as school of automotive machinists and studied by students at lincoln tech and. Lotus elite engine spares lotus excel parts, lotus. It was originally designed by harry munday in 1961. Useful info technical info lotus esprit torque loading specifications for lotus 907 and 912 series engines. Below are the pictures swlc took while carrying out the work.
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