Fuel Pressure Regulators....what are you using?

[pearlS13]

Hey guys I'm currently running a megan racing FPR and its a piece of junk. I have my base pressure set at 3.4 Bar and a few days of driving i notice my wideband showing a leaner a/f so i check the gauge on the fpr and its down to around 3.0-3.1 Bar. Im looking to get another FPR but I cannot decide on which one to go with.What is everyone here using?

[karmakaze]

Hey guys I'm currently running a megan racing FPR and its a piece of junk. I have my base pressure set at 3.4 Bar and a few days of driving i notice my wideband showing a leaner a/f so i check the gauge on the fpr and its down to around 3.0-3.1 Bar. Im looking to get another FPR but I cannot decide on which one to go with.What is everyone here using?

I have a SARD

[teddy]

I have a SARD

Same here. Aeromotive makes nice stuff as well.

[vutony]

Nismo over here

[lestat2369]

Nismo as well

[pearlS13]

Thanks for the input guys. I was looking at the nismo type A, the one that bolts directly to the rail but that fpr doesn't have a fuel gauge. How would I be able to hook up a fuel pressure gauge using the nismo type A fpr?

[vutony]

Thanks for the input guys. I was looking at the nismo type A, the one that bolts directly to the rail but that fpr doesn't have a fuel gauge. How would I be able to hook up a fuel pressure gauge using the nismo type A fpr?

yup

[wildacexxx]

i think u have to put the gauge on the line that comes from the fuel filter onto the fpr

[pearlS13]

you mean the line coming out of the fuel filter going into the rail?

[95lstegman]

stock. no reason to pump up fuel pressure vs. new injectors. they'll last longer, possibly flow more evenly across the cylinders anyways, and will support a lot more power. either way you have to tune; why not get the most reliable solution? and if you chip or get an expensive chipped ECU (enthalpy, JWT), you can have the injector latency adjusted to idle perfectly.

[da40]

stock. no reason to pump up fuel pressure vs. new injectors. they'll last longer, possibly flow more evenly across the cylinders anyways, and will support a lot more power. either way you have to tune; why not get the most reliable solution? and if you chip or get an expensive chipped ECU (enthalpy, JWT), you can have the injector latency adjusted to idle perfectly.

i was thinking about buying ant tuneing my s14 witha safc and fpr(already have the ethalpy)so i dont have to get a fpr and just make it work with the safc by itself??just need to fine tune

[ILikeMy240sx]

stock. no reason to pump up fuel pressure vs. new injectors. they'll last longer, possibly flow more evenly across the cylinders anyways, and will support a lot more power. either way you have to tune; why not get the most reliable solution? and if you chip or get an expensive chipped ECU (enthalpy, JWT), you can have the injector latency adjusted to idle perfectly.

If you get a chipped ECU, it is most likely that you will need an adj FPR to move the entire fuel curve up and down due to the sensitivity of the MAF. You would do this on the dyno for the best result. You will also need it if you have a walbro fuel pump which will effectively bump up the fuel pressure.

In summary, even with a chipped ECU, it is nice to have an adj FPR to be able to adjust the entire fuel curve up and down.

[DrifterProdigy85]

Walbro and stock FPR sucks. Stock FPR is made for the flow of the stock fuel pump. When the Walbro pump is added, the stock FPR is limiting some of what the walbro puts out causing really high fuel pressure from what cant be limited. I had this problem when my car started missing and found i was running 55psi fuel pressure with the stock FPR. Upgraded to a Nismo and its all good now.

[wildacexxx]

wat is the stock fpr pressure again? i think i have the problem as u with my stock fpr

[DrifterProdigy85]

Stock pressure should be 43.5psi vacuum disconnected or 36-37psi vacuum connected. When i had the stock FPR, my pressure was 50psi with vacuum connected, which is insanely high.

[wildacexxx]

Stock pressure should be 43.5psi vacuum disconnected or 36-37psi vacuum connected. When i had the stock FPR, my pressure was 50psi with vacuum connected, which is insanely high.

how did ur car run? i think my stock fpr is messed up. when i start it in the morning it runs really rich and stalls a couple of times im thinking of getting a adjustable fpr to fix the prob

[DrifterProdigy85]

car ran fine at idle and cruising but once i would boost, it would hesitate and buck almost like bad plugs.

[seishidrft]

i have a stock SR with a wablro 255 pump. and lately its been hesitating and sometimes i cant even rev, and the rpms just drop and car dies. the stock FPR is crimped a little. my shop told me to try getting one that isnt crimped. or should i just get an aftermarket one.

[wildacexxx]

get aftermarket. something that can hold the pressure of the walbro. thats wat im going to do

[aleph1]

I am boosting 17-18lbs and i run the walbro with 550cc injectors on a stock FPR and SAFC2...runs great. i see no reason to get an adjustable FPR.

[SR20DETGUY08]

ive got a mines ecu and ill be running a walbro with stock injectors...i was thinking just to avoid any problem I might as well just go ahead and buy the adj. fpr. Most likely a Nismo one or something of good quality. But I guess I will find out exactly how it owrks when the motor goes in after I put it back together!

[pearlS13]

Well i got fed up with my megan fpr and i took it off today and out hte stock one back on. Now here comes the weird part....Im running wayyy richer with the stock fpr than i was with the megan one set at 3.2 Bar. At idle its the same, only under boost its too rich, like 10.5 :1 on the wideband! I also notice a slight hesitation when i first rev it, like if i blip the throttle its kinda stuters a little bit and i notce a little puff of black smoke when i initially rev it but once the revs get up no smoke. It almost seems like a IC leak somewhere but im getting perfect vacuum and my boost hasnt changed/dropped at all.

[bardabe]

I got a SARD at 38Psi. Walbro Fuel pump. and love it. I only get crazy backfire decelerating from the freeway (getting off down shifting instead of brake) think if I up the fuel pressure to like 45 I'll be shooting flames??? or more importantly hurt my motor???

[oneslow240se]

im running a upgraded t25 with stock fpr stock injectors boosting only 10psi, fmic.. runs great good gas mileage no hesitation idles fine... at what point do you need to upgrade the fpr?