PI Conversion -- Fuel Lines etc.

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osholt
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PI Conversion -- Fuel Lines etc.

#1 Post by osholt » Sun Mar 29, 2020 4:04 pm

I took my 2000 saloon off the road in September after I moved house to start a PhD; it is now in my parents garage with the longer term aim of converting it to PI. It was running fine when it went in, I just did not have anywhere to park undercover which is becoming essential due to the increase in rust bubbles around the car.

Now that I am home with my parents for obvious reasons, I thought it would be a good time to start moving forward. I have a PI tank, newly reconditioned 2.5 PI engine and gearbox and all the injection gear is waiting to be sent off for exchange/recon. The car already has a PI-ratio diff because of a mishap at a garage a few decades ago involving the diff and axles falling off during a test drive and the garage doing an "upgrade" in repayment for the disaster. I digress...

I have a few questions to which I hope there are answers. I do not plan to keep this conversion fully factory, mostly for practical reasons. It is my understanding that the original PI fuel lines were made of a mishmash of plastic pipes going under the car. I have not been able to find these for sale and I would personally be happier using hard line. Does anyone have drawings or photos of the supply and return line routing? How much hardline is required. Did you opt to place the pump in the boot or in the wheel arch? Any other tips are welcome too!

Thanks for your help,

Oliver
Register Member No. 7822-01/17

Triumph 2000 Mk2 Sapphire Blue (1972) - Currently being upgraded to 2.5 EFI
Triumph TR7 Convertible Persian Aqua Blue (1980) - Press car, nearly on the road!
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Re: PI Conversion -- Fuel Lines etc.

#2 Post by Tinsmith_Skippy » Tue Mar 31, 2020 8:29 am

Hello Oliver Chris Witor Sell the pipes to the metering unit https://www.chriswitor.com/products.php?cat=317&pg=2 The Mk1 Pi is hard line but not all the way through joined with plastic to the return tank because its probably impossible bend hard line to the tank, Plastic to the metering unit because your engine moves when running. The early Mk2 had plastic all the way through but then I guess movement of the engine the pipe would chaff against the bodywork and fail so they changed it to metal in the gearbox area and then run in plastic. I've made up the hard line pipes for the Mk1 Pi but drawing it would be impossible, it was hard enough with the pipe in front of me. It runs down the prop / gearbox tunnel, it has join to turn to enter for the pump assembly.

Later fuel line run with metal pipes at the gear box tunnel.
Image

You can just about see the metal pipes in this photo.

Image

I haven't got any of the mk1 I'm afraid.

hopefully this helps.
Ross Taylor & Paul Taylor
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Re: PI Conversion -- Fuel Lines etc.

#3 Post by BP2500Estate » Sat May 02, 2020 9:04 pm

I am trying to return my 73 2500 Estate back to PI. It is difficult to fine how the lines run from the boot area to the metering pump. I have the hard lines from Chris Witor, I thought they mounted to the Metering Pump and then connected to the plastic nylon lines in the transmission tunnel? Your comments greatly appreciated.
I am also looking for 2 fittings:
1- The Fitting that connects the Plastic nylon line to the Tee in the boot.
2- The Fitting from the Plastic nylon fuel line to the steel line that connects to the metering pump.
I will try to attach a picture
PI Fittings Needed.jpeg
https://triumph2000register.co.uk/phpBB ... &id=2298re.
Brian P
1973 250 PI MK2 Estate Wagon Sapphire Blue
1968 TR 250 Royal Blue

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Re: PI Conversion -- Fuel Lines etc.

#4 Post by Alec » Sun May 03, 2020 12:39 pm

Hello BP,

the picture you have posted looks wrong, there is no need for the plastic piece, the steel line would be better connected with a flared end to the steel pipe, rather than the olive you have in the picture. However I have never owned an estate P.I. and my parts book only shows saloon P.I. parts, for some reason, not estate. On the saloon the main line from that Tee connects directly to it, but is a plastic pipe from memory? The part number for that pipe is 217843 or 217848 if an automatic.
If lines are hard to find, the fuel system uses normal BSP pipe fittings whihc are available from industrial hydraulics suppliers or companies like RS components on line. On my MK 1 saloon which I converted to P.I. I used copper lines, which can easily be flared to suit.

Alec
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Jaguar MK 2 (Long term restoration.)
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Re: PI Conversion -- Fuel Lines etc.

#5 Post by BP2500Estate » Sun May 03, 2020 5:23 pm

Thank you Alec,
It is a big help knowing that the fittings are BSP. I will start to look for a supplier of BSP here in the States. We use a NPT here, only adds to confusion when working with the auto parts stores. Would you know a reference size for the Tee connection? Yes, I might have to switch to a hard line vs plastic. These two connecting points are what is holding me up from installing the PI system.
Thanks for the Part numbers, the lines are hard to find and the parts book does not show the metal lines by the Metering Pump.
I am sorry to Oliver for tagging on to his posting, but seamed to be close to the same subject.
Thank you
Brian
Brian P
1973 250 PI MK2 Estate Wagon Sapphire Blue
1968 TR 250 Royal Blue

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Re: PI Conversion -- Fuel Lines etc.

#6 Post by johnnydog » Sun May 03, 2020 11:58 pm

Alec wrote:
Sun May 03, 2020 12:39 pm
Hello BP,

However I have never owned an estate P.I. and my parts book only shows saloon P.I. parts, for some reason, not estate.

Alec
Alec,
The parts book for the Mk1 estate was a 'supplement' (part no 513836/S1) which could be added to the original parts book or kept seperately, which is probably why you don't have any reference to it in your particular book.
15885502340791177636936.jpg
I also think there were later parts supplements that covered the introduction of the Mk1 PI estate.....
Register Member no. 1596

1967 Mk1 2000 in Gunmetal Grey
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1970 Mk2 2000 in Valencia Blue
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1973 Mk2 2.5 PI in Sienna Brown
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Re: PI Conversion -- Fuel Lines etc.

#7 Post by Alec » Mon May 04, 2020 8:27 am

Hello John,

thanks for that, I was a little puzzled as it shows the carburettor fuel lines.

Alec
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MK1.5 2.5 P.I.
Jaguar MK 2 (Long term restoration.)
Hymer 564 Motorhome.

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Re: PI Conversion -- Fuel Lines etc.

#8 Post by Tinsmith_Skippy » Mon May 04, 2020 11:19 am

This is the part your missing on the PRV Valve and its 1/2 Inch UNF
You need 2 x cone dish type hosetail (60 degree) fittings which might be more on the pneumatic side

Image

Image

I've Bought this pipe from witor and the nut is also 1/2 unf but you need to flare the end.

Image

But you need to buy this part also which is 1/2 UNF: https://www.chriswitor.com/proddetail.php?prod=149767B

Image

Hope this helps.
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Re: PI Conversion -- Fuel Lines etc.

#9 Post by BP2500Estate » Mon May 04, 2020 8:43 pm

that is a big help, that hosetail is a challenge to find or make. Thank you for the pictures and info. I have been dealing with Chris, a very big help for these components, but hard to find.
Hopping somebody has the hosetail and fitting setting in the garage or storage ares :)
The process continues, but getting closer with everybody's help.
Best Regards.
Brian
Brian P
1973 250 PI MK2 Estate Wagon Sapphire Blue
1968 TR 250 Royal Blue

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Re: PI Conversion -- Fuel Lines etc.

#10 Post by Mike Stevens » Mon May 04, 2020 9:35 pm

The same fittings ought to be available from TR5 or TR6 specialists. Note, not the TR250 or TR6C as they were carb cars not injection. I don't know how many, if any, injection cars were exported to the US but it might be a way forward.

Good luck!

Cheers,
Mike.
(South Oxfordshire)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)

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