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Fuel and braking systems

PETROL INJECTION COMPLETE PUMP KITS TR5-6

TR5-6 Mechanical Petrol Injection with a modern fuel delivery pump systems.

We are often asked why it is necessary to change so much of the fuel system in the rear of the car to get it right, it is not just a case of changing the pump kit, there are other parts around the pump that need to be compatible. Almost exclusively, the type of pump found in these conversions is of the axial type and are generically referred to as 'Bosch type'. We see many homemade pump conversion and some commercially available that at best are poor performers, and at their worst, downright dangerous. These axial pumps, of which Bosch is one manufacturer, operate by the roller pump drawing the fuel over the electrical motor and require a 'flood feed' meaning that the pump must have a constant head of fuel above it. By contrast the Lucas pump can suck fuel up.
RevingtonTR introduced their Bosch fuel pump system in 1987 with the help of Bosch UK engineers who assisted by ensuring we had the correct specification for the whole fuel system of which the pump is an integral part. Whilst most modern (even in 1987) fuel injection systems work at 3-4 bar, the Lucas mechanical Petrol Injection system runs at 7bar. The Bosch engineers were able to advise us that there was only one pump in their range that could work at that pressure; a 6 bar pump with sufficient safety margin to run at 7 bar. We used this pump with excellent results for 30 years even though it runs at near to its top limit. More recently we have sourced a motorsport pump that runs at 10 bar which ensures we are operating well withing the operational range of the pump. Having been the supplier of the most sophisticated and reliable pump system on the market for over 30 years it is reasonable to assume that we have a considerably in depth knowledge of how the Lucas PI system operates and how best to integrate an axial high pressure pump within the existing parts of the Lucas system for best results. I hope the following helps. J. N. Revington.
 

Over the years we have seen innumerable variations on the theme of a 'Bosch type pump' installation, some good, some OK and some positively dangerous. At the onset it should be remembered that the fuel pressure is over 7bar (100psi) which will seriously spoil your day if there is a leak. Often, we find that the fuel delivery system contains a cheap Bosch pump (there are over 300 to choose from) cobbled in with as many original parts as can be used. This is far from ideal as these axial pumps work in a completely different way to the original Lucas pump as described in the introduction.

The first part of the petrol's journey is the tank and this must have an anti surge reservoir to work correctly. Many tanks don't; if it looks original it is over 40 years old and made of steel. There is likely to be corrosion inside it which even at a minimum will create particles which the filters will need to deal with. No fuel system should be expected to work with dirty fuel but an injection system is particularly sensitive as the fuel is flowing around the system all the time rather than delivering just the fuel that is being consumed, which is the case with a Carburettor system. Part number 312359XALK is a suitable aluminium replacement petrol tank.

The pump kit itself needs to be a 7 bar pump; almost all axial pumps are intended for fuel systems working in the 3.0 to 4.0 bar range, these are plentiful and they are cheap. No surprise therefore that we come across these very often. We use a motorsport  high pressure pump in our P.I fuel pump kits that is capable of running at 10bar; more than adequate for the 7 bar needed by the Lucas Petrol Injection system. There are other knock on effects too. The wiring should be modified with a relay as the original pump drew 3.5 amps whereas the modern pump takes 13 amps. Kit RTR4017K provides all the necessary electrical parts to install a suitable relayed feed.

The Pressure Relief Valve (PRV) will work but can only run with rubber hose otherwise it screams if the pressure is set correctly (we have seen customers instalations where the pressure has been set so low below limits to stop this that the engines' performance has been severely limited). A much longer hose will in most cased stop this but with the pressure set correctly the fuel can permeate through the rubber hose and cause petrol smells in the boot.

If the PRV is changed to a diaphragm type (RTR4456K) and a Teflon lined feed hose used (RTR4048-1), there will be no screaming (resonance actually) and the petrol smell can be greatly minimized and at best eradicated. Using our latest pump kit, RTR4050-1K featuring all Teflon lined hoses ensures there can be no petrol vapor smells permeating from the hoses, which is the case with rubber hoses, even those with a stainless steel braided outer covering.

After 1972 Triumph introduced an inertia switch to cut the fuel pump electrical feed in the event of a hard collision. This may have been retro fitted; worth checking and if there isn't one- fit one. RTR8346K is the part number of the modern reliable part. If you have an existing inertia switch it is worth checking that it actually works. Many have been fitted in the feed to the modern pump, can't take the load and have melted inside and are therefore useless.

A shield part number RTR7259 in front of the pump set under the boot floor is a good idea to minimise the amount of mud that can collect around the pump accelerating corrosion, reducing the life of the parts and making servicing more difficult. Also to make fitting the wiring easier and a good idea for all future electrical needs is an auxiliary fuse box kit RTR8270K that couples directly to the alternator and makes adding additional equipment (in this case the pump and inertia switch) easy.

Summary

1: Modern axial pumps must have a good electrical supply capable of passing 13 amps. The original car wiring is not adequate, as the Lucas pump only requires 3.5 amps. We supply a relay kit part number RTR4017K. See below.

2: TR5 and early TR6 cars did not have an anti-surge reservoir in the petrol tank. Cars fitted with this type of tank will experience fuel starvation on tight left hand corners with less than a quarter of a tank of fuel. Our replacement tanks, fitted with the correct anti surge reservoir, part number 312359XALK should be fitted to remove this annoying symptom. See Fuel Tank Section where other tanks are listed including an alternative economy tank.

3: Fitting Pump Kits RTR4050KRTR4050XK and RTR4050-1K should take about three hours.

4: We have found that stainless braided hose cannot be used between the pump and the original PRV as the hard nature of the outer sheath gives rise to intolerable resonance. Unfortunately modern fuel will permeate through rubber hose, however fitting Pressure Relief Valve kit RTR4456K is a complete solution which will remove resonance and allow a fuel tight Teflon lined feed hose to be used. See the section titled 'FUEL FILTERS, REGULATORS, VALVES AND TAPS' where kit RTR4456K  can be found and is fully explained along with other relevant kits.

11 results found.
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  Part No. Description and Comments Price Add to Cart
RTR4050XK

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RTR Upgrade

Axial PUMP KIT PI cars, for fitment outside, with tap.

Revington TR information: This High pressure Fuel Pump kit for TR5-6 Petrol Injection cars includes a motorsport grade axial pump, pre-filter and pressurised filter. Developed by RevingtonTR, externally mounted, this kit replaces the Lucas fuel pump and filter system... READ MORE

£598.24

Ex VAT @ 20%
£498.53


RTR4014C

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RTR Upgrade

PI PUMP KIT OUTSIDE SUPPORT BKT

Revington TR information: This stainless steel cradle is used in conjunction with RTR4050XK P.I. pump kit for outside use only (hanging under the boot floor) and allows the screws holding the pump kit in place to be in the... READ MORE

£29.16

Ex VAT @ 20%
£24.30


RTR4050K

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RTR Upgrade

Axial PUMP KIT, PI. Fitment in spare wheel well, with tap

Revington TR information: Revington TR developed this high pressure pump kit based on a Bosch style axial flow pump and pressurised filter in the late 1980's. An on/off tap connected between the petrol tank and the first feed hose,... READ MORE

£598.24

Ex VAT @ 20%
£498.53


312359XALK

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ALLY TANK KIT TR4-6 LARGE CAPACITY

Revington TR information: TR4, 4A, 5, 250, carburettor TR6 and Petrol Injection (PI) TR6 aluminium, extra capacity Fuel Tank. This tank includes all the correct internals for use with petrol injection (PI) fueling systems both mechanical and electronic and... READ MORE

£688.04

Ex VAT @ 20%
£573.37


RTR4017K

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RTR Upgrade

RELAY KIT. Axial flow PUMP kits TR5-6PI

Revington TR information: Relay kit for axial flow (Bosch type) pumps when fitted to TR5-6PI. The pump wiring on these cars is intended to run the original Lucas pump, which only draws about 3 amps. The original wiring is... READ MORE

£50.60

Ex VAT @ 20%
£42.17


RTR4456K

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RTR Upgrade

FUEL PRESSURE REGULATOR

Revington TR information: This Pressure Relief Valve (PRV) kit replaces the original PRV found in TR5's and TR6's and as it is of a modern diaphragm design, cures many problems inherent in the Lucas Mechanical Fuel Injection system. Key... READ MORE

£143.38

Ex VAT @ 20%
£119.48


RTR8346K

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RTR Upgrade

KIT INERTIA SWITCH + CONNECTOR

Revington TR information: Modern Inertia switch kit, including a much more reliable modern version of the original TR6 item. A must on safety grounds for all Electrically Pumped fuel systems, petrol injection or carburettor electric fuel pump. This modern... READ MORE

£50.60

Ex VAT @ 20%
£42.17


RTR7259

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RTR Upgrade

SHIELD PUMP FUEL TR5-6PI OUTSIDE

Revington TR information: TR5 and 6PI under wing petrol pump shield. This aluminium shield is designed to protect a Bosch pump kit from mud and water thrown up by the rear wheel, when the pump is mounted outside under... READ MORE

£59.72

Ex VAT @ 20%
£49.77


RTR4048

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RTR Upgrade

HOSE RUBBER PUMP - PRV 648mm (25")

Revington TR information: High pressure Rubber Hose 648mm (25") long with a straight union at one end and a 90 degree union at the other; suitable for use with RTR axial flow (Bosch style) Pump Kits. N.B. See note... READ MORE

£44.77

Ex VAT @ 20%
£37.31


RTR4048-1

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RTR Upgrade

HOSE TEFLON LINED SS BRIADED.

Revington TR information: Teflon lined, stainless steel braided high pressure Hose 648mm (25") long with a straight union at one end and a 90 degree union at the other; suitable for use with RevingtonTR axial flow (Bosch type) Pump... READ MORE

£52.74

Ex VAT @ 20%
£43.95


RTR8270K

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RTR Upgrade

AUXILIARY LOOM & FUSE BOX KIT TR2-8

Revington TR information: TR2-8 (or any car of any age for that matter) Auxiliary Fuse Box and Loom kit. This kit provides 8 extra fuses; 4 supplied directly from the battery and 4 ignition controlled via a relay, to... READ MORE

£112.81

Ex VAT @ 20%
£94.01


11 results found.

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