Who logs fuel pressure?
#22
Wow. Thanks for the detailed response! The gauge I have is a cheap Amazon unit so it doesn't specify what type of sensor it uses. I'll need to dig a big deeper.
#23
I've run this because I like to live dangerously:
https://www.ebay.com/itm/Pressure-Tr...frcectupt=true
I learned that a walbro 255 was too much for the stock NB FPR and would rock up to 75 psi at idle and drop as PW increased. Walbro 190 didn't have this bad habit, and supported 650cc injectors just fine to 80% duty cycle.
https://www.ebay.com/itm/Pressure-Tr...frcectupt=true
I learned that a walbro 255 was too much for the stock NB FPR and would rock up to 75 psi at idle and drop as PW increased. Walbro 190 didn't have this bad habit, and supported 650cc injectors just fine to 80% duty cycle.
#30
Tweaking Enginerd
iTrader: (2)
Join Date: Mar 2013
Location: Boulder, CO
Posts: 1,809
Total Cats: 366
The ebay transducers come with pigtails, but I have found them to be unsuitable for automotive use. I have logging for many different pressures on my car, almost every one of the pigtails that came with the transducers has failed.
There are decent options available, search for 904-222, get a pigtail with at least 20AWG wire.
There are decent options available, search for 904-222, get a pigtail with at least 20AWG wire.
#31
https://express.google.com/u/0/produ...BoCkFEQAvD_BwE
this should work for fuel also. Do you have ability for logging oil pressure ?
this should work for fuel also. Do you have ability for logging oil pressure ?
#32
Tweaking Enginerd
iTrader: (2)
Join Date: Mar 2013
Location: Boulder, CO
Posts: 1,809
Total Cats: 366
I log everything. I log oil pressure in 3 locations. Fuel pressure in 2. I log air pressure in 7 locations and EGP. The AEM sensors are nice, but I have had 2 of them fail on me over the years.
#35
(I'm gonna loan this thread)
Can anyone help me? I'm having strange fuel pressure drops at track but only after 10min of hard driving. If I do one cooldown lap, pressure is back to normal.
Things I tested so far:
-New AN6 teflon fuel lines
-three (3) different fuel pumps (currently using AEM 400lph)
-three different fuel pump "intake filter socks" (currently using awesome Holley Hydramat)
-two different engines+turbos. No difference If I have 400whp or 500whp setup
-Temps looks ok. (fuel temp, coolant temp and oil temp)
-didn't find any leaks in FPR vacuum hoses
Only parts left that I haven't change is OEM fuel filter(its new) and oldschool Begi Fuel pressure reg. (UFO looking big thing). With 26psi boost pressure that I run, my fuel pressure stays around 600kpa (87psi) at the begin and after 10min in track I lost half of that pressure.....And nothing in temps change that much....
Can anyone help me? I'm having strange fuel pressure drops at track but only after 10min of hard driving. If I do one cooldown lap, pressure is back to normal.
Things I tested so far:
-New AN6 teflon fuel lines
-three (3) different fuel pumps (currently using AEM 400lph)
-three different fuel pump "intake filter socks" (currently using awesome Holley Hydramat)
-two different engines+turbos. No difference If I have 400whp or 500whp setup
-Temps looks ok. (fuel temp, coolant temp and oil temp)
-didn't find any leaks in FPR vacuum hoses
Only parts left that I haven't change is OEM fuel filter(its new) and oldschool Begi Fuel pressure reg. (UFO looking big thing). With 26psi boost pressure that I run, my fuel pressure stays around 600kpa (87psi) at the begin and after 10min in track I lost half of that pressure.....And nothing in temps change that much....
#36
Why are you using sky high fuel pressures? Set base pressure to 43.5 psi and use properly sized injectors. With 26 pounds of boost you should see about 69.5 psi at the rail at full boost with a proper rising rate FPR. If you've already done everything else and your fuel temp is not getting out of control then replace the FPR and see what happens.