172 fuel pump / pressure query

[Hollister]

You may be aware im putting the F7R based engine from my current car into a Mk2 shell.

As it was on a Mk1 it had a high pressure motorsport fuel pump, a fuel rail with return to the tank and a PRV set to keep 3bar fuel pressure in the rail.

Now when it goes into the Mk2 the stock pump doesnt have a return, which is where I have a problem.

Now, my question is: Does the standard 172 pump incorporate a PRV to keep the correct pressure in the fuel rail, as there is no return to the pump?

And if so, what pressure does the standard pump supply to the rail?


As far as I can see it I have 2 options:

Fit a pump with a return, or fit a non-return fuel rail; but that will only work if the stock pump can supply and keep the required 3 bar pressure...

 

[Fred@BTM]

3.5bar off the top of my head, i've never had to modify the fuel system, and thats on a 240bhp engine

 

[ben_p]

i am having to fit a swirl pot, race pump, filter, return, fuel presure reg and using the 172 pump as a lifter pump

 

[Fred@BTM]

^you're running 400bhp though

 

[Hollister]

i am having to fit a swirl pot, race pump, filter, return, fuel presure reg and using the 172 pump as a lifter pump

Wheres that all going? In the spare wheel well?

What do you think will be easiest, converting the existing system to a return type or the engine to a non return rail?

 

[ben_p]

you will want a FPR though?

doesn't the carbon canister return to the tank?

 

[Hollister]

Ill have to take my 182 road car apart to see how it is plumbed in

 

[Daz Clio Cup]

you will want a FPR though?

doesn't the carbon canister return to the tank?

I think it goes to near the top of the filler pipe, or mine is when i was investigating the canister pipework when i went to ITB's