Morgan +8 4.0 GEMS upgrade kit including chips, Magnecor leads and Knock Sensors


Morgan 4.0 Gems complete essential fuel management upgrade - Chipping - Magnecor Leads - Knock Sensors.

(Bespoke ECU Chipping required for your Morgan to unlock it's true potential and efficiency - incredible, noticeable gains to be achieved.)

We are able to offer upgrade chips for other Land Rover / Range Rover models with the Hotwire, Gems/Sagem or Bosch/Thor Engine Management, see our other listings for details or contact us.

What is this listing for?

Here we are offering a comprehensive upgrade package for all Morgan 4.0 models fitted with the Range Rover Gems type engine and the same software for a 2 tonne plus car, Its corrective and upgrade issues beyond belief.

To fully explain
Your Morgan is not a range Rover, it does not weigh 2 tonne plus, so when you are putting your foot down gently to cruise speeds or for hard acceleration, the load feedback is not there for the ECU to compute, thus the engine runs critically lean, fuel is wasted, plugs are fouled and the performance is dull, this then leads to engine pinking and detonation.

To prevent severe detonation the knock sensors may most likely have be removed, this puts the ignition advance into to default locked mode, further enhancing dull performance high emission, unstable idle, poor economy and much shortened engine life, This along with other issues is why your Morgan fails to have the punch and sparkle it should possess, there are other issues too but here is where to start

What's included here
  • New Tornado Sagem ECU Chip - 2 Quick fit EPROM Mark Adams chips. Offering a simple DIY installation.
  • A bespoke Set of 8.0mm Magnecor plug leads including the coil lead.
  • Genuine ( ERR5594) Knock Sensors - preventing servere detonation.

What are the gains from a chip install only?

From just installing the ECU chips you can easily expect at least 20-25% increase in torque throughout the entire rev range, bhp and efficiency too. The chip upgrade is also compatible with our piper camshaft upgrades, K&N sir filters, Carbon Fibre Super Flair Trumpets ad our full or partial Stainless Steel exhaust system without modification.

Please Note : It will be necessary on Sagem vehicles to perform a security re-learn once these ECU chips have been fitted to enable the engine to start. This can be done with Test Book, Rovacom Lite, FaultMate or any other 3rd party diagnostics equipment which has the capability of the re-learn security option. If in doubt please contact us.

Will I need any special tools?

Not at all, the only tools required are a screw driver for removing the ECU from the car. A T20 Torque screw driver for removing the ECU lid and then a small flat headed screw driver for removing the original ECU chips.

Could Chipping lower engine temperature?

The fuel maps direct from Land Rover are very weak on the mid range fuel/air ratio. This will be beginning to cause problems with engine internal temperature, and can be the cause of valve guide, or worse still, shifted liner/cracked block problems, commonly found in Range Rovers and heavier 4x4 cars. This however, is normally in countries running very low octane fuels, but the advantages are for all.

I have heard that after chipping I might have problems?

Although we have chipped many hundreds of Morgans we have encountered an occasional issue which has always gone back to the vehicle build which have all been resolved. These issues were simply....

When Morgan build the wiring loom for the dash board they placed the rev counter wire in the same part of the loom to the Alarm signal/Engine check light wire. When the ignition is first turned on the alarm code is sent down the alarm signal wire, however at the same time the rev counter resets its self and this causes a voltage spike to travel down the rev counter wire. As the alarm signal is a very weak but precise the rev counter pulse interferes with the alarm code and causes the ECU to receive an incorrect code. This causes the engine check light to come on and fr the engine to not start that time. Although the engine check light will then remain on until reset the vehicle will start next time the ECU receives a correct code.

Once the chips are fitted a security learn process is required to enable to new ECU chips to learn your 10AS alarm module code (This code is unique to your vehicle so can not be pre programmed) We have found that in some instances the 10AS alarm modules is faulty and will not perform this procedure and no communication to the 10AS can be established. In the couple of instances of this we have replaced the 10AS module with a new unit, then programmed the 10AS with the relevant information. Once this has been done then a security learn can be performed correctly.

The OBDII communication port is wired incorrectly causing communication problems. We have OBDII ports with wiring kits available to re-wire this and rectify the fault.

The ignition switch contacts have been faulty causing the ECU not to shut down correctly, this causes the battery to go flat over a period of time unnecessarily. You could try another ignition barrel here although we have found that a relay can be used to ensure that the ECU receives a direct 12 to 0 volt drop.


Magnecor plug wires 8.0mm Blue Suitable for all Rover V8 Engines 1967-2009.

(Superior 8.0mm Wires, for 'all' Rover V8 Engines and engine variants, just specify what you have and we will supply the ones you need)

Upon purchasing a set of our Magnecor wires, please specify upon payment, the type/model of car you have or indeed the engine's origin, especially if not now in its original vehicle (Kit cars Custom/Retro or other V8 Converted Cars).

Minimum expected benefits.
  • Increased Fuel economy, 10 -20% nominal is to be expected.
  • Increased engine torque, especially through transitional low end and mid range load/Rpm driving.
  • Engine torque smoother & more enthused-enabled through improved combustion
  • Far cleaner & lower emissions creating for far longer engine life.
  • LPG (GPL) Recommended due fuel octane increase to 110 with LPG
  • EnhancedService life of Ten years minimum can be assumed or 100 thousand Miles.This would truly be a lifetime for most vehicles
  • Atthis cost, Magnecor wires will not only be the most costeffective upgrade you ever made but will also considerably enhance thedriving pleasure of your cherished vehicle.
  • Forfurther assurance we can reliably state we have supplied many thousandsof sets of Magnecor wires the past 15 years and 99% are still in usewithout fault or perhaps the engine itself has given up first.

Plug leads exposed.

  • UK Factory hand built (by Humans) and checked for continued maximum manufacture assembly reliability.
  • Spiral wound for full capacitance build up to create shortest, highest possible ignition voltage detonation.
  • StainlessSteel hand built construction at the 'Spark Plug' connection toeliminate normal corrosion otherwise causing all damaging HT. contactdegradation.
  • Cap/plug wire contacts hand fitted rather than by blind machines.
  • Manyboot style and angles both at plug lead and distributor fitment endsvariable in the set to provide perfect fitment and avoidance ofobstacles such as hot exhaust manifolds.
  • Minimum8mm Silicon cover, ( 8.5 Red Also available) Silicon although in itselfis of no value for spark enhancement, but very good as the ultimate RFinsulator wire strengthener, damp inhibitor and durability, all beingonly real purpose of the use of silicone in plug wires here. (if colouris important though we offer 8mm Blue and 8.5MM red)
  • Fitand forget, the lifetime warranty offered with these Magnecor wires canbe truly believed and we will guarantee to replace any faulty ones ofour own back for a ten year period.

Magnecor design Origins.
  • In the beginning. Designed primarily for pure racing engines using racing ignitions, turbo charging and supercharging.
  • The Entire jacket was made from aerospace extreme heat-resistant silicone rubber.
  • Exclusive magnecor 2.5 mm Metallic Inductance Suppressed Conductor will suppress EMI indefinitely, allowing this cable to be used on all road vehicles with any ignition styles and especially essential for LPG gas converted vehicles..
Excellent RFI & EMI suppression, flexible high-strength, high-silicon construction

Please do not confuse Magnecor with cheaper high-street or original equipment leads. Spiral wound leads, hand built by Magnecor, actually boost spark output and plug gaps can safely be increased by 10-20% due substantial higher spark delivery voltage.

Magnecor Road & Race Wires (you don't need to read this)

Are used on most serious race engines such as current engines used in the USA in NASCAR, Winston Cup, Grand National and Super Truck series, SCCA (including successful factory vehicles and other series winners), IMSA, NHRA etc. Magnecor Race Wires are also used on many race engines competing worldwide; Australians would be interested to know most successful Touring Cars, including most cars running at Bathurst, use Magnecor Race Wires. They have been successfully run on many 5,000+HP Top Fuel engines. However, unlike all other performance wires, Magnecor Race Wires can be used to improve ANY street engine ignition performance ­ because they provide EMI suppression!


Brand New Pair Engine Knock Sensor as removed from a P38.

(Genuine Land Rover Part - Part number ERR5594.)

Small but essential we have it all, bid now to avoid disappointment, because when it's gone it's gone and there might not be one available in such good condition.

What is this listing for?

This listing is for a pair of brand new Gems Engine Knock Sensor as suitable for the Range Rover P38. Genuine Land Rover part - part number ERR5594.

  • Brand new Pair Gems Knock Sensor as suitable for Range Rover P38.
  • Also suitable for other Sagem "Gems" engines including Land Rover Defender & most likely Morgan V8.
  • Genuine Land Rover Part number - ERR 5594
  • We have it most / all parts for your Range Rover, if you don't see it listed please contact us.
  • Here you can see a picture of the brand new knock sensor as detailed in the listing.

FAQ Zone

  • Is it possible to Visit Rpi. for collection, further information or for parts to be fitted.
    For sure we have many customers from all over the world, that not only visit us but enjoy our unique hospitality, as well as our in-house workshop facilities that can cater for anything from major rebuilds, restorations, engine fittings, LPG conversions. As well as drop in chipping and ignition system upgrades. Holly our Engine builder (Head Chef maybe) can always find the time to show you around the world of V8 Rover engines and explain all variants and upgrades.
  • Whats more, Now with online 'You-Tube'. videos too.
    To help give you the real feel of all we can offer, what we can achieve and the standards we aspire too we now have a space on 'You-Tube' for your enlightenment. ( to afford you a unique, real time snapshot of what you can expect from us. What's more, to see, feel and genuinely experience the passion we have for what we do and what we can do for your V8.

(See our other eBay items)

If you are paying by Paypal or are located outside of the UK, please refer to payment instructions. Please also remember our prices are inclusive of EEC VAT which can be deducted from your final bid price if you have exemption, or delivery of your item is outside the EEC states.

Summary of My Selling Policies
Payment We accept most payment methods. Paypal is preferred, for purchases under £250.00, and we also accept all major debit/credit cards, bank to bank transfers, cheques (allowing up to 10 working days to clear), bank drafts, plus most other legitimate/reasonable methods of payment.
Fees UK Value Added Tax is included in the final price of the Item(s) purchased; however, if you reside outside the EEC, and your purchase is exported directly outside the EEC, then you will not be liable for EEC VAT at 20%. Thus this excess charge will be deducted from your parts total by dividing your purchase total price by 1.2 to remove the VAT.
Also, if you are within the EEC VAT scheme, and provide your EEC VAT registration number, then the same reduction in purchase total may apply.

Local import duties are not covered in our quotes and we advise that you check such liabilities before you place your bid if you are unsure.
Please contact/inform us if you feel you qualify for EEC VAT exemption, and, if appropriate, we will adjust your invoice to remove the EEC VAT content, plus raise appropriate export documentation if required.
Shipping We ship/post to the UK, Europe & Worldwide (mostly by fastest surface or air mail), and include appropriate packaging - no matter how sophisticated your parcel, within our delivery/postage quotation.
Adequate insurance is always included, unless otherwise specified.
Furthermore, if you purchase multiple items, then the cumulative postage quotes will be adjusted downwards as appropriate.
Delivery Stock items are invariably shipped within 48 hours of cleared funds (normally within 24 hours or same day). All Ebay shop and auction items are assumed as being stock items (unless otherwise stated), and will be posted/shipped within this timeframe, assuming all financial transaction and delivery details have been completed.
All items purchased requiring modifications, upgrades, or for the inclusion of additional stock or non stock parts, may be subject to delay, however, you will be notified accordingly.
Refunds & Returns Consumers in the E.U. who buy at a fixed price (Buy it Now) have the right to cancel. To cancel, please contact us in writing or by e-mail within 7 working days after receiving the goods. You will have to return the goods to us at your own cost and risk; we will refund the purchase price and the original postage charge.
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Our Vat number is 373 2330 72

RPi Engineering International Ltd.
Wayside Garage,
Holt Road,
NR10 3EE

Technical specifications