recommended fuel pressure
31 January 2009, 09:36 PM
#3
Former Sponsor
iTrader: (4)
Join Date: Jan 2001
Location: ECU Mapping - www.JollyGreenMonster.co.uk
Posts: 16,548
Likes: 0
Received 2 Likes
on
2 Posts
if it is not adjusting I would suggest you have plumbed it wrong..
if the bottom most fuel pipe connected to the return on the bulk head?
What make fpr?
Simon
if the bottom most fuel pipe connected to the return on the bulk head?
What make fpr?
Simon
01 February 2009, 10:16 AM
#5
it was supposed 2 b a sard, but some guy on here tried a fast one, and its a crappy ebay one. but as i had it i thought id try it. as i just finished my rebuild and only added exhaust, n air filter with parallel fuel mod.
i got the return from fuel mod to bk of fpr, and then from bottom of fpr bk to tank?
i got the return from fuel mod to bk of fpr, and then from bottom of fpr bk to tank?
01 February 2009, 11:04 AM
#7
Scooby Senior
iTrader: (3)
Join Date: Jun 2006
Location: Slowly rebuilding the kit of bits into a car...
Posts: 14,333
Likes: 0
Received 0 Likes
on
0 Posts
See manufacturers web-site, I think most come in "ranges" to suit different applications, A massive drag V8 obviously needs vast amount more fuel than a Scooby street car.
imho
dunx
imho
dunx
Trending Topics
01 February 2009, 11:12 AM
#8
dunx, as we know, std' pressure is 3bar with vac off.
So presumably for any given injector size at that pressure, it'll flow the rated cc of the injectore.g. 440s will flow 440cc of fuel at 3bar at 100% IDC.
What, therefore, would 3.5bar of pressure make the 440s flow at 100% IDC?... Seeing as the pressure has been incresed by 16.67%, would it effectively 'turn the injectors into' 513cc ones, then?
So presumably for any given injector size at that pressure, it'll flow the rated cc of the injectore.g. 440s will flow 440cc of fuel at 3bar at 100% IDC.
What, therefore, would 3.5bar of pressure make the 440s flow at 100% IDC?... Seeing as the pressure has been incresed by 16.67%, would it effectively 'turn the injectors into' 513cc ones, then?
01 February 2009, 11:58 AM
#9
Scooby Senior
iTrader: (3)
Join Date: Jun 2006
Location: Slowly rebuilding the kit of bits into a car...
Posts: 14,333
Likes: 0
Received 0 Likes
on
0 Posts
That's why I fitted a Fuellab.... saves swapping injectors that are close to their limit, mine 505cc @ 400 bhp, so 16% is a decent margin for safety !
HTH
dunx
HTH
dunx
01 February 2009, 12:10 PM
#10
Yeah 16% is more than enough as modern day injecotr will vary their delivery well within only about 2% - that's why JGM will typically set the IDC to 98% whan mapping for max bhp potential, but still perfectly safe i.e. injectors should never max out. 
Just a quick one... When an injector is spec'd, I take it it's spec'd at a rate of cc/min? e.g. 440s at 100% IDC are capable of flowing 440cc of fuel per minute?
Just a quick one... When an injector is spec'd, I take it it's spec'd at a rate of cc/min? e.g. 440s at 100% IDC are capable of flowing 440cc of fuel per minute?
01 February 2009, 02:30 PM
#16
Scooby Senior
iTrader: (3)
Join Date: Jun 2006
Location: Slowly rebuilding the kit of bits into a car...
Posts: 14,333
Likes: 0
Received 0 Likes
on
0 Posts
A pal had a Cavalier.... Dave Bogg used a crow-bar to support the std reg. whilst his lad twatted it with a lump hammer !
Those were the days !
LOL
dunx
Those were the days !
LOL
dunx
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM