10 replies to this topic

[madaboutcherry]

i've taken delivery of a specialist components rotrax crate engine so in the coming weeks or months i'm going to be asking a lot of questions.

firstly, i've already fitted an mpi tank and pump. any recommendations about what fuel hose should i use and do i run then inside or underneath the car?

secondly i'll have to source an intercooler and pipes. the block is an mpi block so there's room for the cooler to go behind the grill.

any tips about the install will be very welcome as i'm a forced induction virgin.

[MrE812]

Sounds like a lot of fun to be had once this is all installed. I too have wrestled with the fuel line issue. 

I decided to run -6 (dash six) solid pipe inside the cabin with small lengths of 5/16" fuel hose each end.

I've fitted an electric fuel pump near the tank and pressure regulator/filter in the engine bay.  

From what I've learned you must not have any joints inside the car, it's been a challenge to route it properly - my car is more rally style than luxury though.

If you want to avoid any doubt (about legality/Inspection) and don't intend to have the car too low / rally it about in the scrub you might find it easier to follow the OEM path under the car.

Check out "Project Binky" on YouTube for some ideas about running lines (not sure which episode number, sorry).

[madaboutcherry]

what does -6 mean?

[DeadSquare]

what does -6 mean?

 Pass Go, and do not collect £2,000-00 ?

Edited by DeadSquare, 05 December 2019 - 11:59 AM.

[mini13]

-6 ferers to  oil/fuel hosing, usually stainless braided.

 

https://www.ebay.co....6 hose&_sacat=0

 

[nicklouse]

-6 ferers to  oil/fuel hosing, usually stainless braided.

 

https://www.ebay.co....6 hose&_sacat=0

mmm it actually refers to the size of the fitting and therefor the hose etc that will be attached.

[mini13]

hes right you know, but I dont want to get into explaining it, basically its expensive pretty fittings and good hoses
 

[MrE812]

what does -6 mean?

Indeed as other have said it's just a indication of the size of the pipes/fittings etc.

Have you come to any conclusions for your own project yet?

[madaboutcherry]

I,m no further along really. I don't really want to run the fuel pipes over the top of the subframes as the car is going to be quite low.

as for the intercooler and tubing i'll have to a lot more research.

[mini13]

If I were doing it ( again)

 

I would stick a couple of Bulkhead connectors like the ones below in the Front and rear firewalls,

 

https://www.ebay.co....gkAAOxyY9VRNiuX

then stick -6 to Barb connectors in the engine bay and boot to connect to to the carb/fuel reg/fuel tank using fuel injection hose ( also its easiest to use the MPI tank with the pump inside it)

 

https://www.ebay.co....boAAOxydlFS7mS-

 

Inside the cabin I would run PTFE lined hose, and hose ends, that will give you a basically a failiure proof  line in the cabin (or as close to as is practical) its a bit tricky to work with, but at that diameter hose is good for 1000psi.

 

https://www.ebay.co....d8AAOxyRhBS7mPF

https://www.ebay.co....uAAAOSwNhNdljMy

 

 

[madaboutcherry]

I like the look of the bulkhead connectors, but doesn't that introduce more places for fuel to leak. I would prefer a single run from tank to engine bay. I've already fitted an mpi tank.