Waldi Posted March 1, 2019 Report Share Posted March 1, 2019 Hi Ian, That is the first time I hear this, fwiw. I cannot see why it would be different for another pump make. The PRV reduces the pressure of the fuel that is going to the MU. The MU is at 105 psi (sorry, it is psi, not bar, as I posted earlier) Do you know why TRGB recommends this lower set-pressure, I would be interested to understand. Waldi Quote Link to post Share on other sites
iani Posted March 1, 2019 Author Report Share Posted March 1, 2019 4 minutes ago, Waldi said: Hi Ian, That is the first time I hear this, fwiw. I cannot see why it would be different for another pump make. The PRV reduces the pressure of the fuel that is going to the MU. The MU is at 105 psi (sorry, it is psi, not bar, as I posted earlier) Do you know why TRGB recommends this lower set-pressure, I would be interested to understand. Waldi Gary told me that this style of pump cannot cope with the higher pressure, here are the spec's of the pump: HI OTP019 Out-Tank Fuel Injection Pump Fittings In:- 15 Fittings Out:- 12x1.5 Banjo Stub Pump:- P3019.1 Voltage:- 12v Flow Ltr/Hr (Max):- 270 Flow Ltr/Hr @ 3 Bar (44psi):-210 Flow Ltr/Hr @ 5 Bar (73psi):- 186 Location To Tank (Mtrs) 0.6 Length (mm):- 195 Diameter (mm):- 58 The low rate would seem to be reducing at higher pressure from these. Ian Quote Link to post Share on other sites
Waldi Posted March 1, 2019 Report Share Posted March 1, 2019 Hi Ian, the flow rate of every rotating type pump will drop with increased pressure, that is normal. If a pump is operating at a too high pressure ( higher than what it is designed for) it can fail, yes. Not sure of which make the pump is you have. Several Bosch pumps also cannot operate at 105 psi, others can, and the flow reduces with pressure increase for all off them. Mine runs very sweet at 105 bar, but has not seen hot summer days, so too soon for me to tell if it is really ok. I would ask TRGB if the MU and/or injectors require calibration, I would think so. I’m sure more wise people (Neil?) will respond soon, I’m sure. Regards, Waldi Quote Link to post Share on other sites
iani Posted March 1, 2019 Author Report Share Posted March 1, 2019 I'm shortly going to be changing the head & cam Waldi, I intend putting the car on a rolling road afterwards to have the fuelling set correctly, the place I am going to is familiar with injected Triumph's and is used by Jigsaw Racing routinely. Quote Link to post Share on other sites
Rogcastle Posted March 1, 2019 Report Share Posted March 1, 2019 Hi Ian Waldi I think you meant lbf/in2. Just checked the Lucas manual and pressure at the MU should be between 100-110 so +1 to Waldi. Ian if you still have a problem I would check your wiring as your pump draws a lot more current than the old Lucas one. I had similar symptoms and it turned out to be the wiring. Roger Quote Link to post Share on other sites
iani Posted March 1, 2019 Author Report Share Posted March 1, 2019 7 minutes ago, Rogcastle said: Hi Ian Waldi I think you meant lbf/in2. Just checked the Lucas manual and pressure at the MU should be between 100-110 so +1 to Waldi. Ian if you still have a problem I would check your wiring as your pump draws a lot more current than the old Lucas one. I had similar symptoms and it turned out to be the wiring. Roger I don't seem to have a problem now Roger, the car is driving fine, I have set the PRV to the pressure given by the company selling the conversion kit. I show 12.8v at the pump with the lights & fan on, I don't have a radio to turn on, that power is supplied by a direct feed, not the original wiring. Quote Link to post Share on other sites
Rogcastle Posted March 1, 2019 Report Share Posted March 1, 2019 Hi Ian You should be ok then. Enjoy the sunshine wherever it is! Roger Quote Link to post Share on other sites
johnw Posted March 1, 2019 Report Share Posted March 1, 2019 Hi iani, there is some debate as to whether copper plug leads should be used with these electronic ignitions. I changed to copper in 2017 and have had 2 electronic units fail, may be coincidence, but have gone back to points and kept the copper leads. Worth checking before you damage your other ignition system. Regards John Quote Link to post Share on other sites
iani Posted March 1, 2019 Author Report Share Posted March 1, 2019 (edited) 1 hour ago, johnw said: Hi iani, there is some debate as to whether copper plug leads should be used with these electronic ignitions. I changed to copper in 2017 and have had 2 electronic units fail, may be coincidence, but have gone back to points and kept the copper leads. Worth checking before you damage your other ignition system. Regards John Thanks John, I am using Magnecor KV85 leads, I’m fairly sure they aren’t copper. Edited March 1, 2019 by iani Quote Link to post Share on other sites
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