Petrol Engines
While this page is entitled "Upgrades" which rightly refers to performance, it is equally applicable to the care and attention with which the engines are built. When comparing prices with other suppliers it should be borne in mind that ALL JE engines are built to at least Club Motorsport standards. They are NOT a collection of bog-standard bits thrown together for profit expediency. In addition to the usual "rebore and bearings" as recommended by 'experts'(!) ALL JE engines are based on a thoroughly cleaned and de-burred block, new core (freeze) plugs and bungs, improved oilways and oil returns; all rotating parts fully balanced, all combustion volumes balanced, recut and shaped valve seats, inlet/exhaust tracts smoothed and de-burred AS AN ABSOLUTE MINIMUM. All this and more on a standard rebuilt engine.Thus, it is usually more cost effective to fit a JE rebuilt engine rather than attempt repairs to individual sub-assemblies which will inevitably result in further repairs sooner rather than later.
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AJV8 Engine
Normally Aspirated
JE will shortly offer increased capacity normally aspirated upgrades to 5.1 litres. These will incorporate the usual JE refinements to the customer's choice. We would draw your attention to the fact that, with its surfeit of power for normal use, the AJV8 engine is particularly suited to LPG modification which gives dramatically enhanced economy.
Forced Induction
JE have a total engine performance package which has received rave reviews in the specialist press (see "Press Comments" This upgrade gives nearly 50bhp over the standard unit and lowers the 0-60mph to around 6 seconds. Truly awesome performance for a luxury multi-purpose vehicle. Work advances on larger capacity versions, although this project is receiving less attention due to the imminent announcement of the new 5 litre JLR engine.
Rover V8
Detailed information for engine upgrade and tuning costs for fast-road use, and track day, sprint or class racing applications.
Prices are ex-works, and the value of exchange parts applies when delivered to JE.
Normally Aspirated Rover V8 Fast Road Short engines:
Fast Road Short engines
. Block, 4.6 based (or 4.0), oil flow-ways optimised, oil galleries physically cleaned and re-plugged, for the 96 mm bore versions, new flanged liners are fitted.
. Crank, polished and carefully balanced, for 86.3 mm stroke, cranks are tuftrided.
. Rods, 4.6 rods are selected, crack tested and balanced. 4.8 and 5.0 rods are our own forged 4340 steel, crack tested, stress relieved, shot-peened, and balanced.
. Pistons, 4.6 and 4.8 pistons are selected standard Land Rover 94.0 mm pistons, selected from the largest grade diameter available. Valve cut outs are machined if necessary, balanced.
. 5.0 litre pistons are 96.0 mm diameter, forged, fully floating pin, with Teflon/MoS2 coated skirts.
(N.B. We can also build 4.8 litre engines using the 96 mm bore and 82 mm stroke, effectively the 4.6 crank and rods, with the 5.0 litre piston and block. This is marginally more effective above 5,000 rpm than the normal configuration, but more expensive.)
Engines are all supplied with new cam and lifters. For 4.6 engines in heavier cars it is usually best to retain the standard 4.6 cam. For lighter cars and where engine tuning can allow more than 5,700 and up to 6,300 rpm, the JE '202' cam gives more power above 4,500 rpm. The '202' cam works well with the 5.0 engine, in all applications.
For installations using the older style front engine cover (i.e. having a distributor), cam recommendations include the JE '101' cam for most fast road uses, but again, in lighter cars a more sporty cam can be used. The Crane '218' profile is a good 'track day' cam.
For an additional fee the engine can be built up with customer supplied sump, front pulley, and flywheel, etc., but not manifolds, heads, or any ancillaries. A customer supplied water pump can also be fitted within this price. Balancing of flywheel and/or front pulley, if not supplied with the exchange engine, is also charged.
Retail Prices:
4.0 litre or 4.6 litre £3,490.00
4.8 litre (94 mm bore, 86.3 mm stroke) £4,290.00
4.8 litre (96 mm bore, 82 mm stroke) £4,790.00
5.0 litre (96 mm bore, 86.3 mm stroke) £5,890.00
Additional for build with supplied sump etc. £300.00
Balancing of non-original flywheel and front pulley £80.00
Please note exchange value of old parts credited against above (see below)
Racing Short engines:
Where power in excess of around 360 bhp is required, the engine speed will be likely to regularly exceed 6,500 rpm. Depending on the exact specification required it is likely that steel billet crankshafts and in some cases steel billet connecting rods will be required. This gives some flexibility in terms of achieving precise stroke requirements, and hence the ability to meet class-defined capacity limits.
Retail Prices 'Race' short engines (Examples):
4.0 litre (e.g. 94.4 mm bore, 71.4 mm stroke) £6,950.00
4.5 litre (96 mm bore, 77.7 mm stroke) £7,250.00
4.6 litre (96 mm bore, 79.4 mm stroke) £7,250.00
5.0 litre (96 mm bore, 86.3 mm stroke) £7,250.00
5.1 litre (96 mm bore, 88 mm stroke) £7,550.00
For other parts appropriate to race engines, please enquire.
Roller rocker shaft assembly's Adjustable pushrods
8-Throttle induction systems Rocker covers to clear roller rockers
Injectors Fuel injection throttle bodies
Tubular exhaust systems Air horns and air filters
Aluminium flywheels Lightened steel flywheels
Lightweight starter motors Competition clutches
Coils, wires, and plugs Dry sump systems
Wiring looms Engine ECUs
Exchange value of engine parts:
Provided the parts are reusable within our programme, and of appropriate type, the value to JE of good condition parts delivered to JE is as follows:
Cylinder Heads (Pair) £500.00
Block £700.00
Crank £200.00
Rods (set of 8) £200.00
Older style engines:
Where tuning of earlier engines is required (i.e. 3.5, 3.9 or 4.2 original units), we recommend use of our 4.5 litre conversion.
Cylinder Heads:
. Standard 'JE build', have standard (40 & 34 mm) valves, re-cut seats, with the ports cleaned up and blended.
. 'Sport' heads have larger valves (41.5 & 37 mm), ports as above and enlarged within constraints of manifolds. Manifolds should be checked and may need some minor material removal to work well with sport heads.
. '2A' heads use the same valves as sport heads, but the ports are enlarged further. The inlet manifolds should be fully worked through as well, to take advantage of the larger ports. Special, or tubular fabricated exhaust manifolds should be used with 2A heads.
. 'Big valve' heads use new larger inlet valve seats and valves (43 & 37 mm), with further porting work. This is the largest type that would be recommended with standard inlet manifold casting types (e.g. Twin Throttle plenum manifold). Race type inlet manifolds are also suitable. Bronze valve guides would always be used with this specification.
. 'Race' heads use new larger exhaust valves and seats (43 & 38 mm) and the valve stem is narrower, thus obstructing the port less. The valve guide is obviously of a smaller bore, as well. This is the ultimate set up for the standard casting. We strongly recommend the use of the latest casting type (4.0 and 4.6 style), as there is a little more metal to work with for these ultimate port shapes.
N.B. Rocker Shafts:
Using Land Rover rocker shafts for speeds in excess of 6,000 rpm, up to 6,800 rpm, we would recommend our reinforced billet steel end supports. Full race roller rocker shafts, using needle roller bearings and improved shaft supports, are also available.
Retail Prices (Outright):
Fitted to JE short engine with gaskets= WG
Separate no gaskets=SNG
Std. JE Build- £950.00 WG £750.00 SNG
Sport- £1,400.00 WG £1,200.00 SNG
2A- £1,600.00 WG £1,400.00 SNG
Big Valve- £2,000.00 WG £1,800.00 SNG
Full Race (from . . )- £2,100.00 WG £1,900.00 SNG
N.B. Exchange value of a pair of appropriate heads in good condition is £500.00
Retail Prices Rocker shafts:
Standard type, new, fitted to JE heads (pair) £165.00
Reinforced, steel billet end post type (pair) £400.00
Full race roller rocker shafts, complete (from . . . ) POA.
Inlet Manifolds and Plenum Chambers:
There is considerable benefit to be gained from work on inlet manifolds, but the cost is quite high. The following assumes the manifold is supplied by the customer.
For inlet manifold work on the earlier 'Lucas' (14CUX or GEMS ) inlet manifolds:
. Minor 'blueprinting' work, cleaning and matching, to help air flow with both 'Std. JE' and 'Sport' heads- £180.00
. Fitting larger aluminium intake air horns (41 mm bore) in the plenum, and working through, gas-flowed fully to suit 'Sport' or '2A' heads- £650.00
. As above but even more work and using 45 mm bore aluminium air horns, to suit '2A' or 'Big Valve' heads- £850.00
For work on Bosch/Thor type inlet manifolds:
. Significant material removal in certain keys areas, together with general cleaning up and matching work, to suit 'Sport' heads- £260.00
We also offer enhancements on Plenum Chambers and Throttle Bodies for the above.
For Single Throttle Plenum Chamber (for Lucas 14 CUX or GEMS ).
. Deburr and polish to improve air flow into throttle- £60.00
. Disassemble, bore out and fit 70 mm throttle (standard is 65 mm), deburr, polish, and reassemble- £180.00
Bosch/Thor, separate throttle type:
. Deburr and polish to improve air flow into throttle- £60.00
. Disassemble, bore out and fit 71.5 mm throttle (standard is 68 mm), deburr, polish, and reassemble- £150.00
Twin Throttle Plenum Chamber
We can also supply our own cast aluminium version of the famous Twin Throttle Plenum Chamber (sometimes incorrectly called 'Twin Plenum'), using larger (68 mm) throttle discs, with the throttles balanced and operated from the centre, between the throttles. This comes complete with the base which holds 45 mm bore air horns, and a fully worked inlet manifold, to suit '2A' or 'Big Valve' heads. Using a single one piece casting for the plenum means the throttles are stable and remain well adjusted, alternative designs using carbon fibre for the plenum or 'bolt-on' throttle bodies are less stable. (Customer to supply lower manifold.) Total price- £1,550.00
High Performance Induction Kits:
High efficiency air filter induction kits can be fitted to many vehicles, reducing induction pressure losses compared to standard arrangements. Price depends on application.
As an example a kit which uses a large ITG filter in place of the normal air filter housing, and includes fitted baffles to keep hot air away from the intake, for a 2000 model Range Rover is £295 fitted.
ECU tuning:
We have a system for tuning the Lucas GEMS ECU (Range Rover 38a, 1995 to 1999) which is completely adequate for normal uses, and this system was used on our Supercharged Range Rovers with no problems. Typical cost to fit new chips to the ECU would be £600 per unit. Typical development cost for a particular tune, including Dynamometer running time, would be £1,800.
For some of the more powerful engines (280 bhp or more) it may be necessary to use larger than standard fuel injectors, typical cost is around £80 each.
Prices for the Bosch ECU (Range rover 38a and Discovery 1999 on) are similar, but we have found the ECU adapts very well to 'docile' tunes up to 280 bhp.
Installation in a car:
Where the engine is to be installed in a car without any major changes to the configuration, the basic charge for removing and re-installing the engine is £800. This price includes a new oil filter, oil, and an oil change after running in.
The following may add to the cost of removal/installation, or may be added by the customer, if required:
Air conditioning system, drain and protect.
Distributor reconditioning, or timing curve modification.
Coil or ignition amplifier pack replacement.
Ignition lead replacement.
Coolant hose replacement.
Radiator cleaning or reconditioning.
Throttle cable renewal.
Air filter renewal.
Clutch and clutch mechanism:
Uprated Clutch parts are available, for example:
The price for a cover and driven plate from AP Racing depends on type but prices start around £390.
On most Rover/Land Rover installations improvements to the release bearing carrier and arm are also required to deal with the extra pressure, adding £65 to the cost. Fitting is free with an engine change.
Automatic gearbox reconditioning:
While having the engine rebuilt, it is a sensible time to rebuild the transmission. Typical cost is £1,250, including uprated internal clutches and fitting. Reconditioning of the transfer gearbox (4x4 Land Rover) can also be carried out, from £500.
Power and Torque Output.
With the immense number of options available, even just for road use, it is impossible to give exact figures for all possible combinations of parts. The following gives a brief specification and expected power and torque figures:
Fast Road 4.6:
4.6 litre short engine £3,490.00
Sports heads £1,400.00
Lucas GEMS tune £600.00
Gas flowed inlet manifold (41 mm) £650.00
4.6 Camshaft FOC.
Deburred & polished plenum throttle £60.00
Cleaning and refitting ancillaries £300.00
Installation £800.00
TOTAL £7,300.00 (outright sale)
Exchange value of core engine (£1,600.00)
NET TOTAL FITTED £5,700.00
This specification should give 245 bhp installed, with a flat torque curve peaking at 290 lbf.ft ( 393 Nm) between 3,000 and 3,500 rpm.
Track day / Sprint 4.8:
4.8 litre (94.0 mm bore) short engine £4790.00
'2A' heads £1,600.00
Lucas GEMS tune £600.00
Gas flowed inlet manifold (45 mm) £850.00
'218' Camshaft FOC.
70 mm throttle £150.00
Cleaning and refitting ancillaries £300.00
Installation £800.00
TOTAL £9,090.00
Exchange value of core engine (£1,600.00)
NET TOTAL FITTED £7490.00
This specification should give 285 bhp installed, with a strong torque curve peaking at 312 lbf.ft (423 Nm) between 3,300 and 3,700 rpm.
Fast Road 5.0:
5.0 litre short engine £5,890.00
Sports heads £1,400.00
Gas flowed inlet manifold (Thor type) £260.00
'202' Camshaft FOC.
70 mm throttle £150.00
Cleaning and refitting ancillaries £300.00
Installation £800.00
TOTAL £8,800.00
Exchange value of core engine (£1,600.00)
NET TOTAL FITTED £7200.00
This specification should give 280 bhp installed, with a strong, very flat torque curve peaking at 328 lbf.ft (445 Nm) between 3,000 and 3,500 rpm.
Track day / Sprint 5.0:
5.0 litre short engine £5,890.00
Big Valve Heads £2,000.00
Lucas 14 CUX tune £600.00
Twin throttle plenum £1,550.00
Crane H234 Camshaft FOC.
High rev lifters, add: £30.00
Reinforced rocker shafts £480.00
Cleaning and refitting ancillaries £300.00
Installation £800.00
TOTAL £11,570.00
Exchange value of core engine (£1,600.00)
NET TOTAL FITTED £9,9700.00
This specification should give 355 bhp installed, with a strong torque curve peaking at 320 lbf.ft (434 Nm) between 4,800 and 5,200 rpm.
Bare Race 4.6:
4.6 litre race short engine £7,2500.00
Full race heads £2,100.00
Crane M 266 Camshaft and solid lifters FOC.
Cleaning and refitting ancillaries £300.00
Roller rocker shaft assemblies, JE Rocker covers (to clear rockers),
Induction manifolds, Injectors, Throttle bodies, and air filters,
Dry sump system, Coils, Wiring loom and ECU. All . . . . POA.
With the right induction, injection, ignition and exhaust systems, this specification can give 380 bhp installed, with a torque curve peaking at 330 lbf.ft (447 Nm) between 5,500 and 6,000 rpm.
There would be up to £1600 in value of exchange parts to subtract from the above totals.
4.5 litre JE 'Clubman's' Engine
When replacing a fuel injection 3.5, 3.9, or 4.2 litre engine, JE strongly recommend
the use of our 4.5 litre version, this uses the original 94 mm bore (3.9 or 4.2) with a
specially made 80 mm crankshaft.Including: block, crank, pistons, rods, camshaft and lifters, vernier/roller-chain cam
drive gears, all fully balanced, oilways in the block cleaned and improved, selected
rods, lightened, and race-standard prepared.Ex-works: £3,490.00
Normally supplied with JE ‘101’ camshaft which is a mild fast road cam. JE ‘102’a
more sporty fast road cam can be supplied for the same inclusive price, or
Crane/Piper products at retail.
Preparation/refitting of all ancillallaries £300.00
Balancing flywheel and front pulley: £80.00
Cylinder heads and induction.
Cylinder heads and inlet manifolds can be prepared to either ‘Sport’ or ‘2A’
specification, prices include gaskets and fitting to short engine.
Both use larger valves, at 41.5 mm inlet and 37.0 mm exhaust. With the Sport
specification we fit 41 mm bore trumpets in the plenum chamber base, and gas flow
from that size down through the manifold and heads to the valve throats.
With the 2A type we start with 45 mm bore trumpets, so the amount of gas-flow
work is greater and more difficult, as we work much more closely to the limits
of the castings.
Total price (exchange) for Sport heads and manifolds: £1,550.00
The total price (exchange) for 2A heads and manifolds: £1,950.00
Price does not include new rocker shafts, these can be fitted for £165.00
Surcharge for non-exchange heads : £500.00
For manifolds the surcharge depends on type and availability.
A 4.5 litre engine with 101 cam and 2A induction, will produce a nominal 245 bhp
and a maximum of 340 ibf.ft torque, with over 300 lbf.ft from 1,500 rpm to 4,500 rpm.
With the Sport induction the power is reduced to about 220 bhp and the maximum
torque is 20 lbf.ft lower. Maximum speed is 6,000 rpm. Higher speeds require valve
train improvements and more sporty camshaft profiles.
Assuming the vehicle is a Land Rover product or recognized Rover V8 drive train
such as Bowler, Morgan, TVR, Westfield, etc the basic price for fitting the engine
to the car is £800, with setting up and tuning extra depending on the injection
system type.
The exchange value of the old engine parts depends on whether they are reusable.
All the ancillary parts are assumed to be re-used in the above prices.
3.9 or 4.2 block £700.
Pair of heads £500.
Set of con rods £100.
Stroker kits for Rover V8.
There are 5 kits of parts available to allow a customer to increase the capacity of his engine by increasing the stroke alone. In contrast to other kits on the market, our rods are lighter and less bulky at the big end, so the overall package is nearly 2 kg lighter and does not require any metal removal in the crank-case to fit the parts.
4.8 litre kits.
A balanced set of crank, rods, and pistons, all balancing done in house.
Our 4.8 litre kits are superior to others on the market due to the use of a specially made connecting rod, unique to JE Engineering. It is significantly longer than the old standard 'classic' rod and therefore makes the piston shorter, reducing weight, while also reducing rod angularity as the crank rotates, reducing piston side loads, and making for a smoother running engine. The rods are forged from 4340 steel, stress relieved, shot peened, and crack tested.
The crank is tuftrided and polished, stroke is 86.3 mm.
Pistons for 94.0 mm bore are standard Land Rover high compression pistons, the largest grade are selected, to minimise clearances if the bore requires honing. Maximum allowed skirt clearance is 0.085 mm (3 to 3½ 'thou').
For worn blocks, use our high grade, cast "plus 20" piston.
Valve cut-outs can be machined into the piston crown if anything other than the standard cam and valves are to be used. Standard bearings are included.
Swept volumes:
86.3 x 94.0 : 4,791 cc
86.3 x 94.51 : 4,843 cc
For later style, large main bearing blocks (4.0 & 4.6) £2,750.
For early style, small main bearing blocks (3.9 & 4.2) £2,950.
4.5 litre kit for early style, small main bearing blocks (3.9 & 4.2)
A balanced set of crank, rods, and pistons. The tuftrided and polished crankwith a stroke of 80.0 mm. The rods are the standard Land Rover type fully inspected and prepared. Pistons are modified standard Land Rover items, selected and prepared. Standard bearings included.
Swept volume : 80.0 x 94.0 : 4,441 cc £1,750
Some oversize and heavy duty bearings are available, please enquire.
Please note that all of our major engine conversions can, and normally are, set up and tested using our in-house dynamometer test cell facilities. Few competitors have this facility, another indication of JE's pre-eminent capability.
Prices do not include VAT which UK customers must add at the current rate.