Indice
Engine Conversions
Honda K20 and Audi 20V turbo engine conversions into Lotus models are a very popular option for achieving large power increases, over what’s available by tuning the original K-Series and Toyota engines. Over the years we’ve gained extensive experience of both Honda and Audi-powered cars. Through that experience we’ve gained the knowledge required to keep your Honda or Audi converted car in peak condition.
JSRacing Audi 20V turbo Conversions
Developed and perfected on our own race-winning Exige, where it competed in Class C of the Elise Trophy between 2007-2009 (before the class was ‘out-lawed’), the JSRacing Audi engine conversion has proved to be a powerful, reliable, and very user-friendly option.
We have concentrated on engine placement, for both weight distribution and drive train reliability, achieving better driveshaft angles than with the original engine. Our gear change mechanism is another key feature, with many customers commenting it provides the best gear change of any Lotus they have driven.
Entry-level conversions start at 270bhp, with high-end builds producing in excess of 500bhp.
Prices depend on many factors as everybody has unique requirements and no two of these high end cars are ever the same. Some example packages and prices are detailed below.
Prices vary according to several factors including condition of receiving vehicle (brakes, wheel bearings etc.) and whether you want to use the original parts (engine, gearbox etc.) to offset the cost of the conversion parts.
Honda-Powered vehicles
While we don’t carry out our own Honda engine conversions, we have extensive knowledge of tuning, servicing and maintaining Honda powered road and race vehicles, including naturally aspirated (NA) and super charged (SC) examples. Please call us with your requirements and we’ll be happy to help.
Audi conversion examples for S2 Toyota engined cars
Its common knowledge that any increase above standard output with the Toyota power train is expensive and can be unreliable, especially in the transmission department.
If you are looking for more power and increased reliability from your Series 2 (Toyota engine) Lotus, then look no further than an Audi 20 valve Turbo conversion from JSR. Our conversions offer a huge performance increase over the standard Toyota unit, with the scope to increase the power further at a later date. This coupled with the great resale value of your second hand Toyota engine, gearbox, driveshafts, supercharger kit and ECU etc. make these conversions excellent value for money. Please see example second hand parts prices at the bottom of this page.
The car following conversion has the same docile driving manners in traffic and at low speeds as the standard car, returning acceptable fuel economy and levels of comfort. But when on the open road, or on track, the additional performance takes the car to another level.
Stage 1 Engine Conversion – Approx. 270BHP
Our Stage 1 conversion uses a BAM spec base engine from a late model donor vehicle with its 6 speed gearbox. Cooling is taken care of by using the highest quality air-to-water Charge Cooler system from our partner ProAlloy along with a new aluminium engine coolant radiator. Another highlight of this kit is that you get to keep your standard car’s air conditioning. Other notable features of this conversion are:
Traction control
Launch control
Replacement ECU
New uprated drive shafts
New clutch
Uprated fuel system including swirl pot
Uprated radiator
Future proof air-to-water Charge Cooler system
£9,405.00 + VAT (Drive in, drive out)
Stage 2 Engine Conversion – Approx. 340BHP
This conversion takes everything from Stage 1 plus several key enhancements. These include a fully rebuilt 1.9ltr engine with uprated internals, new uprated turbocharger and new exhaust manifold. Notable features of this upgrade include:
Everything listed in Stage 1
Forged pistons
Forged con rods
Inconel exhaust valves
Stainless steel inlet valves
ARP head bolt kit
Fully balanced crank assembly
New exhaust manifold
IHI roller bearing turbo
High flow exhaust downpipe
Modified inlet pipework
New oil and water lines
£13,599.43 + VAT (Drive in, drive out)
Stage 3 Engine Conversion – Approx. 420BHP
This conversion really does need to be driven to be believed. It is docile in traffic and can be used on an everyday basis, just like our Stage 1 and Stage 2 conversions, with good economy and driving manners. Then on the open road or track, with over double the power of the NA standard car, the performance is truly electric. Power delivery is instant and relentless! Our own car has returned performance figures of 0-60 in 3.3 seconds with a 0-100 time of 7.0 seconds. The conversion includes everything in the stage 1 and stage 2 conversions along with many additional performance and track focused enhancements. Notable features of this conversion are:
Everything listed in Stage 1 & 2
Race spec aluminium oil separator and breather kit
Aluminium baffled sump
Lightweight flywheel
Uprated clutch cover and friction plate
Uprated steel clutch slave cylinder
Torsen type LSD
ARP cross bolt kit
JSR spec roller bearing turbo
Uprated engine mounts
£16,506.63 + VAT (Drive in, drive out)
Optional Upgrades
Big Port Head
A big port head will further increase the amount of air the engine can flow. Increased power and torque across the rev range is the result. This upgrade is available for Stage 1, 2 & 3 conversions. Expected power increase will be between 15 and 30bhp depending on which conversion it is applied to. Notable features of this upgrade include:
Crack & pressure tested large port head
New valve guides
Inconel exhaust valves
Stainless steel inlet valves
ARP head bolt kit
£1,266.00 + VAT (As part of Stage 1 engine conversion)
£357.00 + VAT (As part of Stage 2 & 3 engine conversion)
Oil Cooler Kits
Depending on the base model of the car to be converted, you may have two, one or indeed no oil coolers. We recommend at least one air to oil, cooler on the Stage 1 conversion and two oil coolers on Stages 2 & 3. Our recommended solution is as per Lotus fitted to the twin oil cooler cars.
Upgrade from no oil coolers to twin front mounted oil coolers, to include all pipes, brackets, ducts, fittings and pipework, when done as part of an engine conversion.
£705.00 + VAT (As part of any engine conversion)
Upgrade from one oil cooler to twin front mounted oil coolers, to include all pipes, brackets, ducts, fittings and pipework, when done as part of an engine conversion.
£212.00 + VAT (As part of any engine conversion)
Drive by wire (DBW) conversion for non DBW cars
Depending on the base model of the car to be converted you may have a cable throttle rather than the latter Drive by Wire (DBW) throttle system. All of our conversions use the latest DBW technology and so non DBW cars need to be converted to this newer spec.
£502.00 + VAT (As part of any engine conversion)
Uprated Engine internals and capacity increase to 1.9ltr for Stage 1
This upgrade really does future proof the engine and will allow power in excess of 500BHP without any further internal upgrades (Note this is already included in Stage 2 & 3). Notable features of this upgrade include:
Forged pistons
Forged con rods
New valve guides
Inconel exhaust valves
Stainless steel inlet valves
ARP head bolt kit
Fully balanced crank assembly
£2,951.05 + VAT (Drive in, drive out)
£2,591.05 + VAT (If done as part of Stage 1 engine conversion)
Race Spec Engine Breather kit
This breather kit has been proven on our race car. It bolts to the block, very low down and allows breathing from the cam cover and the crank case. Any breathed oil is returned to the sump, while any excess pressure is vented to atmosphere (Note this is already included in Stage 3). Notable features of this upgrade include:
Baffled Aluminium oil separator
Sump modified for oil return
Oil and Filter change
£732.60 + VAT (Drive in, drive out)
£328.60 + VAT (If done as part of Stage 1 or 2 engine conversion)
Baffled Sump kit
This fully gated and baffled sump has been proven at track days and in race conditions to completely eliminate any oil surge issues. This product is sold on an exchange basis (Note this is already included in Stage 3). Notable features of this upgrade include:
Aluminium sump baffle
Oil and filter change
£384.70 + VAT (Drive in, drive out)
£160.70 + VAT (If done as part of Stage 1 or 2 engine conversion)
Light Weight Flywheel & Uprated Clutch kit
This flywheel will dramatically change the characteristics of how your engine picks up on the throttle. The engine will accelerate quicker and harder and will not labour under deceleration. The clutch is an uprated item that will handle in excess of 400BHP while retaining a light pedal and good in traffic driving manners (Note this is already included in Stage 3). Notable features of this upgrade include:
Lightweight flywheel
Uprated clutch cover and friction plate
Uprated steel slave cylinder
£1,418.00 + VAT (Drive in, drive out)
£1,018.00 + VAT (If done as part of Stage 1 or 2 engine conversion)
Limited Slip Differential
As you increase the power of your vehicle a limited slip differential (LSD) becomes an essential part of being able to transmit this power to the road. We have been using torsen type LSDs in our track and race cars to very good effect for many years. Our kit also includes an uprated cross bolt kit to ensure long term reliability (Note this is already included in Stage 3). Notable features of this kit include:
Torsen type LSD
ARP cross bolt kit
High quality synthetic gear oil
£1,414.00 + VAT (Drive in, drive out)
£859.00 + VAT (If done as part of Stage 1 or 2 engine conversion)
Uprated Turbo kit (will give a reliable 420BHP only when used with other engine upgrades)
This turbo kit has proven itself on the road and track and will give your Lotus the power you have always craved. The conversion includes a cast exhaust manifold for reliability, a JSR spec roller bearing turbo that will give awesome power, while keeping turbo lag to an absolute minimum. You will still be able to balance your car on the throttle through fast corners without the all or nothing characteristics that sometimes go with big BHP turbo conversions (Note this is already included in Stage 3). Notable features of this kit are:
Cast exhaust manifold
JSR spec roller bearing turbo
High flow exhaust downpipe
Modified inlet pipework
New oil and water lines
£2,634.70 + VAT (Drive in, drive out)
£2,144.00 + VAT (If done as part of Stage 1 engine conversion)
TOYOTA Exige drivetrain resale price examples
If you would like to get maximum return from the sale of your standard parts, below are some guide prices of what you can expect to achieve:
Good useable bare second hand engine - £2,250 - £2,450
Good serviceable gearbox - £800 - £1,000
Good useable super charger kit including ECU, injectors and all hardware- £2,250 - £2,750
A pair of good condition Toyota driveshaft’s - £200 - £300
If you would rather part exchange your standard parts against a new JSR engine conversion, we will discount the conversion prices as follows:
Normally aspirated donor vehicle: £2,000 discount
Super charged donor vehicle: £3,500 discount
Look at our prices and do the maths for yourself, the extra power and reliability you have always wanted is more affordable than you ever imagined!
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Contro non credo ce ne siano sia con Audi che con Honda se non per il prezzo se decidi di farti fare il lavoro avendo già la macchina. Io sicuramente comprerò l'auto già pronta in UK,risparmi un mucchio di soldi, ti devi solo abituare alla guida a dx ma da quello che ho potuto vedere è abbastanza semplice.
