I have a honda prelude.. and it has a fuel pressure regulator on it.. im just curious as to what it should be running..the previous owner upgraded it a lil bit.. intake and full exaust sys..could someone answer my question please?

 

anywhere between 160-180psi should be sufficient.
jk
try 40psi. then adjust it from there..

 

so it should be reading around 40psi..then? i was googling for this information like a ***** and the only thing i found was some guy saying i should be at like 55-58 if you've upgraded airflow.. but im sure my air fuel guage will tell me how well im running right? .. sorry i've never tampered with the fuel sys of a car before so i juss wanna make sure this kid before me didn f things up...ill tune it to 40 and see what happens if im running too low ill be looking at what kinds of indications?

 

whats a good pressure for a Bmotor?

 

^^^Waaaay too vague.

Need some specifics for both of the engines above. And you should use a wideband to get an actual airfuel reading.

 

b20
b16
b18

 

?

 

Generally speaking, 40psi is usually a good starting point for a stock motor with I/H/E...

I run my fuel pressure at 46psi @ idle

 

oem spec is 45-55psi b series

 

43.5 is what most injectores are rated at.

 

i was at 45psi and iwas runnin lean( i pulled my plugs) now im up at 55psi i will pull my plugs in after in 2weeks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC 91 Civic &raquo;</TD></TR><TR><TD CLASS="quote">Generally speaking, 40psi is usually a good starting point for a stock motor with I/H/E...

I run my fuel pressure at 46psi @ idle</TD></TR></TABLE>

is the 40psi generally speaking for any d-series?
for the basics im running the usual i/h/e. when i bought my fpr and gauge it was pushing 42psi and seemed to be running very rich, i could quite a bit of excess fuel.

i was told to drop it down to 30psi but now it feels under powered.

jdm d15b sohc vtec
crappy toms motorsport CAI with K&N filter
2.5" ss exhaust
crappy obx 4-2-1 header (gota sweet deal so s'all good, upgrading to dc in near future).

just wondering a suggested (safe) fuel pressure.
and if it matters, i have choices of 87,89,91,93,94 octane.

help me out.

 

When u guys are giving these numbers, are u doing it with the hose on or off?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HollywoodEH2 &raquo;</TD></TR><TR><TD CLASS="quote">When u guys are giving these numbers, are u doing it with the hose on or off? </TD></TR></TABLE>
the vacum line has always has to be off my friend.

 

doing it with the vaccum off.
ive read on here tho in a few threads that you should pinch it,