The s1 was launched in october 1975 at the paris auto show, and went into production in june 1976, replacing the europa in the lotus model lineup. The 900 series was designed by lotus as their first self developed engine, and due to similarities in dimensions and layout, vauxhall 4cylinder iron blocks were used as testbeds for the lotus dohc 16 valve cylinder head. The following articles have been sent to me by members of the jensen healey community. Jul 16, 2010 gglc lotus 907 engine part interchange cross reference. Mixing and matching will result in very bad things when you try to set the timing. The 900 series engine first appeared in production form as the lotus 907 with the. It was originally designed by harry munday in 1961. It is a great myth that rebuilding the lotus 907 engine found in the jensen healey is unduly and excessively expensive. It was lighter than the triumph tr6 and had 40 more horsepower. The early and late lotus 907 engines have different crank pulleys and timing markers. First produced by lotus in 1976 it has had many revisions and model changes right up to 2004. Lotus engines lotus 900 series engine history home. Lotus no doubt will look to boost the s2s power to weight ratio ofa 218 bhpton past the 230 bhpton 242 bhpton.
Gearbox upgrade tackling the esprits achilles heel. The lotus 900 series is a family of internal combustion engines designed and built by lotus cars of hethel in the united kingdom. Gglc lotus 907 engine part interchange cross reference. Lotus tuning guide for more power and torque on track. Tcb 203 short jackshaft two bolt machined from a new iron blank, full diameter oiling. An overview it is a great myth that rebuilding the lotus 907 engine found in the jensen healey is unduly and excessively expensive. Early elite, esprit turbo, lotus racers, accessories. I have seen dozens of s1s and s2s in person, and only a handf.
This is a bit of a rehash of a post i just made in another thread. Please visit us in person, email or call one of our knowledgeable specialists. Over the past twenty years we have accumulated a vast knowledge of the lotus twin cam engine. Lotus timing belt tensioner bearing suitable for this engine was built by a historic lotus specialist for use in a series one lotus seven competition car some years ago, but has not been run. 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. Lotus the hole in the garage where you throw money. The spare lotus elite engine and transmission i picked up at the junkyard, however, had a pretty consistent bunch of big bolts lessons learned on the early engines, i imagine. The car gained fame through its appearance in the 1977 film, the spy who loved me, where it was featured in a long chase sequence. First, the mounting was a weird mix of big bolts, little bolts, studs, and one flathead screw. The lotus esprit s1 or series 1 is a sports car that was built by lotus in the united kingdom between 1976 and 1978.
Successor to the lotus ford twin cam, the 900 was the first complete engine developed by lotus. The lotus 907 was the first production variant of the lotus 900 series engine. I want to use these parts to build an engine but first i need to find out what i have. It is a personal favourite of mine and probably the first car i ever really noticed. Tcb 202 front cover assembly, as above but taller for 711m and alloy block.
The owner moved out west to a rural ranch and the elite is not readily convertible to 4 wheel drive. It becomes tax exempt as of 1st april 2014 its a complete car that was parked up. A brief history of the lotus esprit everything you need to know. I assume this is for carb engine as fuel injection has different timing, which i cannot find, except on jenson healy forum sorry basil. The best jensen healey lotus 907 engine modifications. A rallytuned lotus engine and fivespeed zf gearbox were engineered into a prototype sunbeam which, after some tuning and testing, went on to gain second place in. The lotus 900 series is a family of internal combustion engines designed and built by lotus. In the event that we inadvertently add something that is coyrighted, please let me know and ill remove it. Products lotus engine parts kemp high performance ltd. Hi, i am starting to rebuild my 907 so i have a couple of questions for you. It displaced 1973 cc and developed approximately 144 bhp 107 kw with dual sidedraft dellorto carburetors or horizontal zenith stromberg carburetors for us cars. Seems to run fine but for that problem and a bad miss when cold, due to oil fouled plugs. Oct 10, 20 built by john toovey and soon to be fitted to my viva gt mk1.
Chamber volumes can be adjusted to suit from 32cc to 42cc. It is said that when vauxhall unveiled its new slantfour engine at the 1967 earls court motor show its bore centers were exactly the same as those proposed by lotus. Jay leno has the first look at the 2020 chevrolet corvette stingray jay lenos garage duration. A brief history of the lotus esprit everything you need. Jensen healey engine parts lotus excel parts, lotus. Lotus twin cam, 907, 910 and 912 engine rebuilds etc lotus transaxles and transmissions. Mar 19, 2020 this new lotus esprit mark 1 was an interesting mix of parts and technology. Ngk has become the brand leader in the uk spark plug market and the number one choice of the professional as a result of its quality, technical excellence and total commitment to research and development.
Has any one every thought of putting a lotus 907 engine into a locost. I plan on stripping it down, rebuilding it over the next couple. Successor to the lotusford twin cam, the 900 was the first complete engine developed by lotus. Following our tuning tips you will avoid many of the common mistakes and actually achieve the car setup you. Im hosting them here so that they are easily and universally accessible to all. Books and research for the jensen healey restoration project.
It is an allalloy inline4 engine with dual overhead camshafts. On paper, the jensenhealey should have been wildly successful. Shop from the worlds largest selection and best deals for lotus 907 engine. Lotus technical data for turbo 910, and 920 motors pdf. The lotus 907 was an engine designed and manufactured for automotive applications by lotus cars. Identifying lotus 907 engine castings jensen h i got these parts from a friend who is cleaning out his shed and wanted to get rid of the parts. 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. Vaqua blasted, skimmed, matched manifold, supplied ready to fit.
It is a common misconception that the lotus 900 series engines were modified vauxhall engines. Blackwatch racing is the leader in racing and performance parts and accessories for lotus elise and exige sportscars. Golden gate lotus club lotus 907 engine parts cross. Lotus 907 engine parts cross reference golden gate lotus club. However lotus has retuned the 2zzge for use in elise, smoothing out the torque dip at the 6000 rpm cam changeover point and strengthening the torque in the other rpm ranges. Lotus 910 dohc 2174cc 210 bhp was put out from 1973cc. I thought id start a new topic on oil pressure in the 907. Initially use the lotus parts bin to upgrade to the lotus 912 hc spec 180bhp. The engine came out of a 78 elite, which it was going back in to. Visit our online store for the best prices and speedy shipping or call.
As far as the longevity of the engine itself, this seems to be the key issue, at least in the s1 and s2 cars. Set the belt on a hot engine to the book spec and it will be too loose. It needed to build a new motor for its new, upmarket cars. Im getting ready to rebuild a 907, the one in my jensen healey, not the lotus, and am wondering if anyone knows of a shop that does these and knows them well.
A rallytuned lotus engine and fivespeed zf gearbox were engineered into a prototype sunbeam which, after some tuning and testing, went on to gain second place in that years mille piste rally with tony pond at the wheel. Lotus 900 series performance cylinder heads and lotus 900. The gglc can not promise that this information is correct and the user should use this information as a possible alternative. Jensen healey engine parts lotus excel parts, lotus esprit. Barry spencer won the 2000 scca solo national championship in his lotus europa. We have a wide range of tuning articles covering all models of lotus from small classic lotus to trackday setup race spec models. Tcb 203 short jackshaft two bolt machined from a new iron blank, full diameter oiling tcb. This document provides all the necessary technical data for the naturally aspirated lotus 907, 911, and 912 engines. It was powered by the 145hp, 16valve, 2liter lotus 907 twincam engine that was fitted to the elite, and it had a 7,000 rpm redline.
Torque loading specifications for lotus 907 and 912 series. Lotus esprit tuning guide, general care and restoration. 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. Currently we are working on a mk2 series 2 1969 ford cortina that started out life as a gt. Lotus elise, engine tuning, king k the sands mechanical. The lotusford twin cam is an inlinefour petrol engine developed by lotus for the. Lotus 907 zero time since completely rebuilt by peter marcovicci of mwe balanced and blueprinted overbore. Gas flowed and cnc machined, new valve guides, valve seats cut to match lotusbits designed waisted valves. Nov 24, 2012 torque loading specifications for lotus 907 and 912 series engines saturday, 24 november 2012 17. With the lotus up and running, its time to add up the cost hagerty. Lotus esprit tuning a free spirit the lotus esprit is an iconic supercar. 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. A must for when youre ready to rebuild that old motor. The 907 engine has had an unusually long life span of nearly thirty years with power output going from 120bhp to 300hp in the esprit sport 300, but not only that.
As standard i am told that they have about 160bhp, and that they match up to a ford box fairly easily. Useful info technical info lotus esprit torque loading specifications for lotus 907 and 912 series engines. The iconic 1976 lotus esprit can be traced to the lightweight, midengine europa an inconvenient road car, with cramped interior and negligible rear visibility. Marcel chichak has some info on tuning the mechanical advance of lucas 2325 or 4345 distributors here. This is the story of the 16valve engine that would go on to produce recordbreaking specific power output. 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 alloy block, head and sump, with cast iron wet liners. This new lotus esprit mark 1 was an interesting mix of parts and technology.
Built by john toovey and soon to be fitted to my viva gt mk1. Jun 14, 2015 uppstart efter renovering av lotus 910 motorn. The jensenhealey was the first production car to receive the 907. Lotus engine for sale jensen healey 1974 lotus engined brake servo and pedal box. Since the inception of the golden gate lotus club, members and friends have shared their technical knowledge and experience with other lotus enthusiasts. I bought it and immediately yanked the seized engine, but when i found.
Lotus 900 series performance cylinder heads and lotus 900 series engine upgrades. The lotus 907 was the first production variant of the lotus 900 series engine and the jensenhealey was the first production car to receive the lotus 907. A derivative of 4 valve engine the lotus 907 engine was dropped into a chyrsler omni sunbeam chassis and became an instant rallye winner type 82 esprit turbo 1981 to present in 1981 lotus added a turbocharger to an production gt uprated 907 engine, dubbed the 910. Remember to tick get notifications if you want to be notified of the latest news from lotus marques. In the early 70s, founder colin chapman was determined to dispel lotuss kit car reputation, and the esprit was the first indication that he might. Lotus tuning tips and modifications maximise your lotuss driving pleasure.
Ive recently acquired a jensenhealey with a very smokey lotus 907 engine in it. My resurrection of the lotus had a unique rhythm to it. Jensen healey lotus 907 engine tax exempt 2 owners low. As an independent engineer, i have worked for a major lotus tuner in germany, designing many of the performance parts they sell. The lotus 907 is an engine designed and manufactured for automotive applications by lotus cars. I have read that lotus used several versions of the 2. Find all the lotus 907, 910, 911, 912 components you need for your engine. It was an original design, dual overhead cam, 16 valve all alloy powerplant.