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The original NG cars were designed around the MGB running gear and that remains the case today. The B series 1800 engine as used in the MGB is a fine engine, with good low speed torque. It is an excellent engine in Findhorn cars, being sufficiently modern to be reliable but with enough character to be entirely apt in our traditionally styled cars. If super-charged, it is given a wonderful new lease of life.
As MGBs began to feel their age with the weighty strength of their bodies holding them back, the Rover V8 was fitted to a limited production run sadly cut short by oil shortage. This engine was adopted into NGs and remains standard specification in the Findhorn TC. It is a remarkable engine with a standard 3.5 litre aluminium block weighing much less than that of the cast iron 1.8 B series engine. Over the years it has seen much development, and is available in many different forms depending on what is desired.
Believe you me, I know just how much heavier the cast iron 1800 block is, because I picked up the V8 block for this photograph with no problem and then nearly dropped the great iron block on my toes!! |
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B Series 1800 Engine
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Findhorn cars offer an exciting range of engines to suit your individual requirements. First there is the classic sports car engine, the MGB Engine.
No English sports car engine was produced in such volume as the 1800cc B series engine. It is a simple straightforward engine, which we use as standard in our four cylinder cars, because it is simply evocative of sports cars of a certain period, it is reliable and parts are easily available.
The strong, well engineered B series engine was in production for 30 years longer if one counts its immediate forebears and successors powering both the MGA and the MGB. As tuned for the MGB, this twin-carb version produces 90 BHP, with its characteristic throaty exhaust note. It will pull happily and strongly from low revs to the 6,000rpm red line. The only modification we recommend as a matter of course is electronic ignition, which helps to ensure reliable starting and never a missed beat.
Even the standard MGB engine gives the relatively lightweight Findhorn TF impressive acceleration through the gears and enthusiastic top speed. If you are looking for more performance, the B series engine is a perfect basis for a wide range of tuning options. The normal tuning route is a gas flowed head, with larger valves and carburettors. This allows the engine to suck in more fuel air mixture and away you go. The pre-war traditional sports car route was a super-charger, which we would recommend, before you think about fancy cam shafts. These cams can give lots more top end power but at the expense of lower speed torque. |
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Supercharged 1800 Engine
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Our recommended route to a quicker 1800 engine is super-charging, the traditional route for English sports cars.
Super-charging or blowing uses a blower to blow the air/fuel mixture into the engine, as opposed to relying on the engine to suck it in. The modern equivalent to a supercharger is turbo charging, an exhaust driven turbine impelling air into the engine; but we think it is a bit too modern!!
The great thing about a supercharger is that it is blowing all the time, so it is particularly effective at boosting low speed torque. Suddenly your car has become much more responsive and at the same time is not asking to be revved so hard. In the TF it is a much more relaxed experience; but that is not to say that you cannot put your foot down and surprise the drivers of modern boxes on wheels at this seemingly ancient machine appearing in the mirror and actually coming past.
The super-charger is available as a bolt on kit just as simple as that. Off with the inlet manifold and a few pulleys and things and on with a purpose designed unit including replacement carburettor, blower and new manifold complete backfire valve (perish the thought) and a bypass for re-circulating the mixture through the blower on light throttle. New pulleys on the front and that is about it job done!! She should fire first time.
To get a bit more technical, your engine may benefit from a rebuild before blowing. You can think about the compression ratio. The blower kit was designed for the US market where a lot of engines are 8:1 compression ratio. This is great because the blower warms the air a little and then the compression does not push the temperature up as the compression stroke ends too close to the detonation point. You can still fit the supercharger to your 9:1 engine; but what you can do with the 8:1 engine is to try a bit more boost with a faster pulley. By the way, you can change the pistons for lower compression with a simple head and sump off exercise.
If you are attracted to a traditional English sports car, you are sure to be attracted to a super charged one!! |
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3.5 Rover V8 Engine
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The second engine powering Findhorn cars at differing specification levels is the Rover V8, usually in 3.5 or 3.9 form.
As with the B series 1800 engine, the Rover V8 has a long and interesting history, really because it is such a good engine. It started life in Buicks, but was judged too small in the 1960s. Here in England, it powered generation after generation of Rovers, including the Range Rover, where most were fitted.
It is very light. Its block is far lighter than the B series block, being aluminium against cast iron. When built up the engines are comparable in weight, resulting in the engines being interchangeable without major suspension changes. The V8 has always had hydraulic tappets, making it an inherently quiet engine.
In Findhorn cars, as indeed in MGBs, the more powerful B series engines and the less powerful V8s are not dissimilar in power output, but the V8 has bags more low speed torque. I am always struck by how many more gear changes people not familiar with the V8 make than I would. Open the throttle and a V8 surges what ever the revs. Naturally, as the state of tune increases, the V8 far outstrips the B series. It does have twice the cubic capacity!
It is the flexibility, the torque, the power and that V8 burble that make it such a great sports car engine, whether following the traffic, powering past as the opportunity arises or settling down for a long fast run, the engine just delivers whatever is asked of it and that includes truly astonishing acceleration in the gears.
We recommend carburettors on the 3.5 V8. These can be the original SUs, if your engine has them, with an MGB type inlet manifold and the SUs arranged at the back of the engine. Alternatively four barrel Webbers are great carburettors, well suited to the Rover V8. Both these engines start easily and dont get flooded by electric chokes or generally have hysterics around the garage!
You can opt for a bigger V8, in which case we recommend the 3.9 EFI. |
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3.9 EFi Rover V8
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This is the last of the Classic Range Rover engines. It is a turn the key and go engine and go and Go and GO!!
In many ways it is the easiest V8 to install despite a load of wiring, a bit of attention needed to the inlet casting and a new plenum chamber. As with the other V8's a rebuild is advisable but like the MGB B series all the parts are readily available, including the camshaft which is as well since the original is quite likely to have politely delivered its peakier parts into the sump!!
Once the 3.9 is installed you will have a simply wonderful engine for your Findhorn. All the virtues of the 3.5 are there but more so. She will burble one second and roar the next at your beck and call. She is well mannered and happy at very low revs, exactly as one would expect of an engine tuned for a two ton Range Rover, except that the Findhorn is half the weight.
There is only so much I can say in extolling the virtues of this engine in a Findhorn car. You need to come and have a test drive!!
Oh and yes it is possible to have more power, in much the same way that if you have a Bentley, it is possible to have a Rolls!! |
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Other Engines
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Within reason any engine can be fitted to a Findhorn Car. A consideration in fitting another engine is what gearbox can be matched to the engine. Again given careful engineering, there are many possibilities, but practicalities do restrict scope.
The 6 cylinder Rover engines as fitted in the SD1 car, are an option, although scarce now. They use the same gearbox as is often used with the V8. The Triumph 6 cylinder engines were fine engines in their day, but they require the Triumph box. We have experience of such a combination. It is a fine installation, but does involve adapting the bodywork. So whilst the idea of straight sixes is great, the options are limited at least in the context of Findhorn Cars being essentially English. The notable exception (in case you think it has been forgotten) is the Jaguar engine, which is a little on the large side.
The other engine that we have experience of is the K series engine; this is a very different engine from the others we use. When introduced, it was truly innovative and it has been very successful in many forms. Being a modern higher revving engine, we feel that it is not so much in character for a traditional sports car, but it is capable of meeting tighter emission regulations of some continental European countries. It has the merit of course of lots of electronics and reliability. It is available with varying cubic capacity. |
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