littleman
|
| posted on 23/7/10 at 07:21 AM |
|
|
How do you set fuel pressure?
I recently bought a fuel pressure guage to go with my regulator. I have been told that i must set the maximum fuel pressure to 2.3psi, the car is a
ZX9R engined Tiger B6.
I set the pressure to 2.3 psi at idle, is this correct? Just when the car is running and i blip the throttle the pressure guage goes down to zero.
This further shows when driving it because when i go full throttle or over 8k rpm it stutters a lot and wont go any faster.
Am i right to think that the fuel pressure is set too low? And if it is how do i set it properly?
|
|
|
|
|
BenB
|
| posted on 23/7/10 at 07:25 AM |
|
|
That doesn't sound right! It shouldn't matter what RPM you set the fuel pressure at the regulator should maintain it..... Infact even if
you set the regulator with the engine off (but the fuel pump running) it should still work.
|
|
|
littleman
|
| posted on 23/7/10 at 07:34 AM |
|
|
quote:
Originally posted by BenB
That doesn't sound right! It shouldn't matter what RPM you set the fuel pressure at the regulator should maintain it..... Infact even if
you set the regulator with the engine off (but the fuel pump running) it should still work.
Yeah i thought so, i guess thats the whole point of having tha damn regulator there in the first place!
Its stable with just the pump running and also at idle and with a little throttle but once the throttle is opened a lot it drops. Could be that the
regulator is faulty i suppose.
|
|
|
BenB
|
| posted on 23/7/10 at 07:42 AM |
|
|
Could be the pump isn't able to keep up / restriction in line flowing to regulator etc etc.
|
|
|
l0rd
|
| posted on 23/7/10 at 07:53 AM |
|
|
Did it start stuttering after the pressure regulator installation?
Work backwards to find the problem.
|
|
|
omega0684
|
| posted on 23/7/10 at 08:02 AM |
|
|
is it running carbs or injection?
I love Pinto's, even if i did get mine from P&O!
|
|
|
tonym
|
| posted on 23/7/10 at 08:07 AM |
|
|
2.3 psi is hardly the pressure you would find in an injection system.
|
|
|
minitici
|
| posted on 23/7/10 at 08:17 AM |
|
|
Is your fuel pipe from tank to pump collapsing?
|
|
|
littleman
|
| posted on 23/7/10 at 08:19 AM |
|
|
quote:
Originally posted by BenB
Could be the pump isn't able to keep up / restriction in line flowing to regulator etc etc.
What do you think is the best way to test for this? I'm thinking to take the pressure regulator out and see what readings i get without that
in, then i can eliminate that. But as for seeing if the fuel pump is up to the job i'm not sure how i would find this out.
|
|
|
littleman
|
| posted on 23/7/10 at 08:22 AM |
|
|
quote:
Originally posted by l0rd
Did it start stuttering after the pressure regulator installation?
Work backwards to find the problem.
I havnt had the car very long and it was fitted when i got it so i cant say.
quote:
Originally posted by omega0684
is it running carbs or injection?
Its on carbs mate
quote:
Originally posted by minitici
Is your fuel pipe from tank to pump collapsing?
I'll check, it will only be a small pipe though as the pump is fitted next to the tank.
|
|
|
daviep
|
| posted on 23/7/10 at 08:28 AM |
|
|
What type of pump are you using?
The bike pump is the easiest option and doesn't require a regulator.
Davie
“A truly great library contains something in it to offend everyone.”
|
|
|
littleman
|
| posted on 23/7/10 at 08:56 AM |
|
|
quote:
Originally posted by daviep
What type of pump are you using?
The bike pump is the easiest option and doesn't require a regulator.
Davie
Its a facet pump, not sure of the max pressure of it but i think its about 7psi.
Would the bike pump be up to the job do you think? just thinking about the extra distance its required to pump over.
|
|
|
daviep
|
| posted on 23/7/10 at 09:28 AM |
|
|
The bike pump should work perfectly, I've got mine mounted on the scuttle "sucking" from the tank but it is preferable to have them
mounted at the tank and "pushing".
We used to run a Facet pump and Filter King regulator on a race car and changed to the bike pump after a lot of problems.
Davie
“A truly great library contains something in it to offend everyone.”
|
|
|
littleman
|
| posted on 23/7/10 at 09:39 AM |
|
|
quote:
Originally posted by daviep
The bike pump should work perfectly, I've got mine mounted on the scuttle "sucking" from the tank but it is preferable to have them
mounted at the tank and "pushing".
We used to run a Facet pump and Filter King regulator on a race car and changed to the bike pump after a lot of problems.
Davie
Thats the same setup as i have currently, facet pump with filter king regulator.
|
|
|
Dingz
|
| posted on 23/7/10 at 12:54 PM |
|
|
It sounds like a flow problem, nothing to do with the pressure. Check the fuel lines are clear and not kinked, is there a blocked filter in the system
somewhere?
Phoned the local ramblers club today, but the bloke who answered just
went on and on.
|
|
|
britishtrident
|
| posted on 23/7/10 at 01:07 PM |
|
|
Pressure regulators that fit into the fuel line between the fuel pump and the carb restrict flow are a liability.
On injection systems it works differently the regulator reduces the pressure by bleeding off fuel from the fuel rail back to the tank.
Better to use a lower pressure pump either a bike pump or Facet road solid state pump (2.5 to 3psi 12 GPH) or an SU style pump with solid state
switching.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
