2 stupid questions!
23 May 2013, 10:45 PM
#1
2 stupid questions!
Evening all, I have 2 very stupid questions:
No. 1 how you cut braided fuel lines without running the braided bit?
No. 2 I trying to work out how to fit my fpr, now I know it goes return side but I can't work out which is the inlet port and which is the outlet port on the fpr, also there is small connection which looks like a connection for a vac line, any ideas what this for?
Cheers for any advice in advance Wigs
No. 1 how you cut braided fuel lines without running the braided bit?
No. 2 I trying to work out how to fit my fpr, now I know it goes return side but I can't work out which is the inlet port and which is the outlet port on the fpr, also there is small connection which looks like a connection for a vac line, any ideas what this for?
Cheers for any advice in advance Wigs
Last edited by wiggy1; 23 May 2013 at 10:50 PM.
23 May 2013, 11:03 PM
#3
Scooby Regular
iTrader: (2)
Join Date: Feb 2013
Location: Belgium
Posts: 53
Likes: 0
Received 0 Likes
on
0 Posts
Evening all, I have 2 very stupid questions:
No. 1 how you cut braided fuel lines without running the braided bit?
No. 2 I trying to work out how to fit my fpr, now I know it goes return side but I can't work out which is the inlet port and which is the outlet port on the fpr, also there is small connection which looks like a connection for a vac line, any ideas what this for?
Cheers for any advice in advance Wigs
No. 1 how you cut braided fuel lines without running the braided bit?
No. 2 I trying to work out how to fit my fpr, now I know it goes return side but I can't work out which is the inlet port and which is the outlet port on the fpr, also there is small connection which looks like a connection for a vac line, any ideas what this for?
Cheers for any advice in advance Wigs
1. Put some electrical tape on the hose where you wanna cut. put it on real thight, then cut right thru the tape. You can leave the tape to put on the fitting.
23 May 2013, 11:25 PM
#7
An adjustable FPR allows you to adjust the static fuel pressure up or down. So you can run 3.5 bar (say) rather than the stock 3 bar and so push more fuel through the injectors (assuming the pump is up to it, and will also need mapping for etc).
But it MUST have a vacuum connection otherwise the fuel pressure varies hugely with boost/vacuum. If you are on 1 bar boost, fuel pressure will *drop* by 1 bar as the boost pressure will literally force the fuel back up the injector.
The vacuum connection maintains a constant pressure regardless of boost - but the adjustable bit allows you to choose what the actual pressure is.
But it MUST have a vacuum connection otherwise the fuel pressure varies hugely with boost/vacuum. If you are on 1 bar boost, fuel pressure will *drop* by 1 bar as the boost pressure will literally force the fuel back up the injector.
The vacuum connection maintains a constant pressure regardless of boost - but the adjustable bit allows you to choose what the actual pressure is.
Trending Topics
23 May 2013, 11:29 PM
#8
Brilliant cheers for that seems I was having a slight blonde moment! Mine will need to mapped and played with anyway as I'm fitting high flow billit fuel rails in parallel as well as putting bigger injectors in at the same time as well, cheers for answering my stupidity 
An adjustable FPR allows you to adjust the static fuel pressure up or down. So you can run 3.5 bar (say) rather than the stock 3 bar and so push more fuel through the injectors (assuming the pump is up to it, and will also need mapping for etc).
But it MUST have a vacuum connection otherwise the fuel pressure varies hugely with boost/vacuum. If you are on 1 bar boost, fuel pressure will *drop* by 1 bar as the boost pressure will literally force the fuel back up the injector.
The vacuum connection maintains a constant pressure regardless of boost - but the adjustable bit allows you to choose what the actual pressure is.
But it MUST have a vacuum connection otherwise the fuel pressure varies hugely with boost/vacuum. If you are on 1 bar boost, fuel pressure will *drop* by 1 bar as the boost pressure will literally force the fuel back up the injector.
The vacuum connection maintains a constant pressure regardless of boost - but the adjustable bit allows you to choose what the actual pressure is.
Thread
Thread Starter
Forum
Replies
Last Post
Brzoza
Engine Management and ECU Remapping
1
02 October 2015 05:26 PM