after market FPR question

[BuLLeTdrift]

Was a fun xmas this year. Outta now where my girlfriend got me a megan racing fuel pressure reg. My brother and I were talkin about a friend of ours and he said he never paid attention to his fuel pressure and his **** was always running bad. so her being very cool and cool about me and drifting, she didn't want my engine to run bad, so she surprised me and got me the fpr. how cool is that?!?

any who, my set up is completely stock. Just did a small freshen up of the top end and my exhaust side of things will be done soon (new mani, elbow, dp, exhaust), but that is the only mods i have. I'm not going to be shooting for super high numbers, but more reliable engine than anything is desired.

Question finally: Would running an adjustable aftermarket fpr on just a simple set up really benefit me? I know running good fuel pressure is good for the engine, but since its so low should i just stay with the stock one?

Kinda in a weird spot cuz she got it for me, and I deff wanna keep the car gifts coming, but if i dont use it, then she'll feel like its not worth it to get me stuff.

Another note, i dont drive this car on the street, track only now.

[lhoy12]

Its fine to run, thats the nice thing about adj. fpr's just hook it up. If you don't want to spend a lot of money for a Fuel Pressure gauge just buy basic fuel pressure gauge and a little bit of extra fuel line and a "T" that will hook up to your FPR (I can show you a pic, I dno't know how to explain very well) and set it at 43.5 psi and you're good to go. If you have a High pressure fuel pump occasionally they blow out the stock regulators anyway.

[BuLLeTdrift]

well i got a 255 walbro. since it is a MR one, it has a gauge on it, but i wont be able to keep an eye on it inside the cabin.

thanx for the reply.

still need some more help tho.

[idahotuner]

well it seems to me that running a adjustable one would be helpful. to adjust if you are running rich or lean.

[Hijacker]

FPRs are really a fine tuning feature. They really won't FIX a lean out condition. They can reduce richness a bit, but it's done in kind of a backwards way of what it shoudl be done as.

Since you have it, there's no reason not to put it on. And it doesn't really matter if the gauge is on the unit or not. You're not doing hardcore racing with the car on a setup that requires monitoring of the pressure.

But I would do what was suggested before. Set it at 43.5 psi idle and leave it be.

[idahotuner]

sweet i was wondering where to set mine at when i install it.

[BuLLeTdrift]

thank you very much guys. a lotta stupid useless stress off my back. 43.5 PSI it is.

[codyace]

But I would do what was suggested before. Set it at 43.5 psi idle and leave it be.

43.5 at idle with the vacuum source disconnected you mean

AND MEGAN RACING FPR'S ARE TRASH.

[otterman]

AND MEGAN RACING FPR'S ARE TRASH.

+50

[Hijacker]

43.5 at idle with the vacuum source disconnected you mean

Heh. Yeah. Thanks for that. I always forget to mention that

[wzntha]

.

[Hijacker]

Yes. What other vacuum source could there be?

[idahotuner]

so you diconect it to set the presuure and then you conect it once you have that number

[wzntha]

.

[Hijacker]

so you diconect it to set the presuure and then you conect it once you have that number

Well, you check it disconnected to make sure the diaphragm isn't seized up. With the vac line connected, it should read 36 psi. If the diaphragm had seized up on you, the pressure wouldn't rise. You can also look at it in reverse. If the pressure is still sitting high with the vac line connected, you can bet that your regulator has decided to stay shut or you have a leaky vac hose.

[idahotuner]

ok thanks

[Hijacker]

Also, the more I think about it, I'm starting to bite into the theory of higher volume fuel pumps causing higher idle fuel pressure situations. Thankfully I have a stock SR with stock 240 fuel pump I can test that theory out on.

[idahotuner]

yea i got the walbro 255 fuel pump. MR fpr. stock fuel rail andi am gettign detsch werk 740 cc injectors

[BuLLeTdrift]

why do people say the MR fpr sucks? looks good to me. haven't put it on yet tho.

[idahotuner]

i actually have quit a bit of mr stuff on my car.

[otterman]

Their gauges suck, their fpr tend to leak and/or lose pressure over time. It seems to be hit or miss on the fpr.

[Emperor_Tha]

why do people say the MR fpr sucks? looks good to me. haven't put it on yet tho.

I had the mr fpr Ran good for 1300 miles. The gauge stop working and the car starting running fat rich.

[BuLLeTdrift]

I run their gauges myself, they aren't that bad. I guess they are a bit hard to see in the sun, but they do a really good job on telling me whats going on under the hood.

Back to the subject, people "hear" MR stuff goes bad, but so far i haven't talked to any1 with actual experience.

[idahotuner]

i will probly end up changing my fpr but for nor i will use it until i notice it messing up.

[otterman]

Back to the subject, people "hear" MR stuff goes bad, but so far i haven't talked to any1 with actual experience.

I've SEEN mr fpr go to ****. It seems to be hit or miss.

I have friends who say their mr gauges compared to higher end gauges (defi, etc), the mr is off.

I wouldn't try their coilovers or manifold because of it. I ran their dump tubes/o2housing on my T25 though, its a single slightly bent pipe. I don't see spending out the *** for a slightly bent pipe.

[CMG]

I run their gauges myself, they aren't that bad. I guess they are a bit hard to see in the sun, but they do a really good job on telling me whats going on under the hood.

Back to the subject, people "hear" MR stuff goes bad, but so far i haven't talked to any1 with actual experience.

How's that for irony...someone posted with personal experience at the same time you were questioning it.

[idahotuner]

i think it is liek most products today, there will allways be a deffective one. but in the use of automotive parts you cant really prove that because simple things like how you installed it could affect its life rate dirrectly.

[codyace]

i will probly end up changing my fpr but for nor i will use it until i notice it messing up.

90 dollars versus 1500 for a new engine? Didn't we go over this before. Sell it to some sucker on another forum....

I run their gauges myself, they aren't that bad. I guess they are a bit hard to see in the sun, but they do a really good job on telling me whats going on under the hood.

So do AdvancedAuto gauges, but that doesn't mean they are precise. I guess if you're looking for a 'general' whereabouts on a stockish car, they would be fine.

Back to the subject, people "hear" MR stuff goes bad, but so far i haven't talked to any1 with actual experience.

Had a local kid near me with a fairly stock sr in a s14. Had an MR FPR. JWT ecu, etc etc, the normal t28 stuff. Car ran like dogcrap....got my wideband in it, and it was in the 10ish AFR wot. We thought it may have been a vacuum leak, changed all, still same issue. I said, well letslook at fueling....so we ran second gauge in line, and watched it from the car....the MR FPR wouldn't hold a price fuel pressure for it's life. It was supposedly a 1:1, but it was doing almost 70psi fuel pressure at times at WOT.

Absolutly trash.

i think it is liek most products today, there will allways be a deffective one. but in the use of automotive parts you cant really prove that because simple things like how you installed it could affect its life rate dirrectly.

MR stuff is cheap, and easily affordable for a reason: Lack of real product development and quality control. When you neglect in those areas, 'lesser good' (inferior) products find their way out into the marketplace.

Some MR stuff will last guys forever....yet there are also many threads on different forums, across different makes about 'issues' and or problems wih them. Compared to name brand stuff, the ratio of problems is staggering.

Again, I know where you're going with this, but I'm from the school of having 10 nice parts, versus 20 off brand ones. Maybe it's a pride issue or something in me :/

[idahotuner]

yea. i think i will hold on to it for now. and use it until it "flakess out". and then replace it.

[Emperor_Tha]

Megan racing product are the same as ebay product. fpr and short shifter Both broke about 1300 miles. Unless they have the megan logo on then its reliable like seat, strut bar, sometimes coilover.