LPG reducer Tartarini RP/77 instructions anyone?
Discussion
Yeap you can use the Tartarini on your Sammie.
Basically if it was previously fitted to a 3.5litre then so long as you use the right mixer that will regulate the gas going into the engine. It is usually (within reason of course) better to have a regulator of a bigger capacity than the vehicle needs as it is easier to turn it down (via the idle and response adjusters) than have one under capacity and try to turn it up. Often if the reg is too small for the engine the draw off the engine will pull the diaphram to its full flow position all the time so flooding the engine.
(I am presuming you are going for the open loop type system. Tank with multi valve with lock off solenoid, lpg lock off solenoid, regulator , manual flow adjuster, mixer on carb or in air intake to carb.
You will also need a petrol lock off solenoid to cut the petrol off when running on lpg.
The dashboard switch will be a three way switch (lpg, no fuel, petrol).
The usual way to run the system is start on petrol once on the move and the engine has got a bit of temperature (average 3 to 5 minutes) put switch in centre position (no fuel) then when the engine starts backing off switch to the lpg setting. (If you go straight over from petrol to lpg the vehicle dual fuels and may run rough as it is over rich).
Alternatively (as Martin does with Geoffrey) you can start and run straight off on lpg by just having the switch in the lpg position. Depending on how tolerant the engine is it may either idle roughly to start with or cut out on idle as the gas will be "fogging" as it will not be warm enough (due to the engines coolant being cold so not warming up the regulator) to turn fully into a vapour.
The system can be made more advanced (again as per Geoffreys current system) by adding a lambda sensor in the exhaust and using a lambda controlled unit to operate a stepper motor that goes in place of the manual flow control.
Basically if it was previously fitted to a 3.5litre then so long as you use the right mixer that will regulate the gas going into the engine. It is usually (within reason of course) better to have a regulator of a bigger capacity than the vehicle needs as it is easier to turn it down (via the idle and response adjusters) than have one under capacity and try to turn it up. Often if the reg is too small for the engine the draw off the engine will pull the diaphram to its full flow position all the time so flooding the engine.
(I am presuming you are going for the open loop type system. Tank with multi valve with lock off solenoid, lpg lock off solenoid, regulator , manual flow adjuster, mixer on carb or in air intake to carb.
You will also need a petrol lock off solenoid to cut the petrol off when running on lpg.
The dashboard switch will be a three way switch (lpg, no fuel, petrol).
The usual way to run the system is start on petrol once on the move and the engine has got a bit of temperature (average 3 to 5 minutes) put switch in centre position (no fuel) then when the engine starts backing off switch to the lpg setting. (If you go straight over from petrol to lpg the vehicle dual fuels and may run rough as it is over rich).
Alternatively (as Martin does with Geoffrey) you can start and run straight off on lpg by just having the switch in the lpg position. Depending on how tolerant the engine is it may either idle roughly to start with or cut out on idle as the gas will be "fogging" as it will not be warm enough (due to the engines coolant being cold so not warming up the regulator) to turn fully into a vapour.
The system can be made more advanced (again as per Geoffreys current system) by adding a lambda sensor in the exhaust and using a lambda controlled unit to operate a stepper motor that goes in place of the manual flow control.
Thanks Techsec,
the RP/77 was in with a load of new LPG bits that I bought via ebay. I have a brand new Lovato reducer, but thought that the Tartarini might be better as it is a newer design.
Any instructions for setting up the RP/77, Techsec?
The reducer on my Land Rover (Stargas) has only an idle screw, but I notice that there are a few more knobs to twiddle and fiddle with on the Tartarini!
The mixer in with the bits won't fit my Weber 32-DFM, apparently it's for a 2.0 litre Honda. Thought about trying to fabricate a new one or playing about with the Honda mixer, but Richard Tinley of TinleyTech LPG says he can get the right Weber mixer for £80, so I might as well do the job properly.
Thanks again Techsec
the RP/77 was in with a load of new LPG bits that I bought via ebay. I have a brand new Lovato reducer, but thought that the Tartarini might be better as it is a newer design.
Any instructions for setting up the RP/77, Techsec?
The reducer on my Land Rover (Stargas) has only an idle screw, but I notice that there are a few more knobs to twiddle and fiddle with on the Tartarini!
The mixer in with the bits won't fit my Weber 32-DFM, apparently it's for a 2.0 litre Honda. Thought about trying to fabricate a new one or playing about with the Honda mixer, but Richard Tinley of TinleyTech LPG says he can get the right Weber mixer for £80, so I might as well do the job properly.
Thanks again Techsec
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