imported_marky

Anyone know:
1) If a fuel pressure regulator will boost the performance of the car?
2) if its legal?
3) where one can be found?

chris_si98

lol...

1)no
2)every car has one, yes
3)on your fuel rail

DumbasSi

In an otherwise stock car, it probably won't do anything. If you had a higher flowing fuel pump and bigger injectors, you might see some gains.

imported_marky

oh ok thanks.. someone told me it was a good way to get 5-10 extra hp. AEM or some performance regulator

chris_si98

stickers are cheaper to make your car faster, I personally like the TEIN stickers.

DumbasSi

With the mods I mentioned, plus a few others maybe.

Your best bet would be starting with the basics. I/H/E. Intake, header and exhaust. Personally, I like doing the suspension first, but thats me. My new car is fast enough for me.

imported_plzbeleiveit

say we have cams, cam gears, intake manfold, headers. would u even see 1hp lol?

chris_si98

if you have cams, cam gears, intake maniod and headers... and you aren't tuned yet for you

imported_plzbeleiveit

if you tuned with chorome, than maybe .5 hp for like 100 bucks. lol.

chris_si98

huh

zeeman

iTrader: (1)

chorome?!?!?!
Is this something splitfire made you buy for $100?

imported_plzbeleiveit

the program chrome, used to tune p28s or obd1

chris_si98

chrome like your 22" rims?

zeeman

iTrader: (1)

if you had cams, cam gears, intake manifold and header tuned with crome you would get more than .5whp.....with the right tuner at least.

But an adjustable fuel pressure regulator is useless without a fuel pressure guage, even then, their benefit is debateable. Honda injectors work good at the stock fuel pressure, and if you need more fuel, upping the fuel pressure is a real half a$$ed method of delivering more fuel. A custom program made with crome would be best.
As far as being legal, i don't know why it wouldn't be.
You can buy one at any performance shop, if you do buy one MAKE SURE to buy a fuel pressure guage and set it back to 45psi.

imported_plzbeleiveit

i mean say your already tuned. and u slap one on a stock fuel steup and play with settings while tuning with chrome. youd dick hp. m i right?

imported_SaYjAiBaO

how would you explain this then?




"DNR's wideband is not functioning so we had to do tuning with out it. We started to raise the fuel pressure, and each time the low end gain is very obvious. We went from 42, 44, 46, 50, to 53 psi. There's huge gains down low (about 15% gain on average!) but the top end (7000-7800) was getting a little rich and loses a bit of power. We compromised and settle on 51 psi."

this is off www.akmee.com their sohc setup is pretty good for NA.

zeeman

iTrader: (1)

wow, so you tuned without a wideband?!?!?!?!...safe.
Like i was saying, a FPR is a crude way of tuning the fuel. With a custom program, you can give it more fuel down low (to see those gains you did) and just a little more up top, instead of just raising the fuel pressure and being stuck with what you get.

So the added strain on your fuel pump (caused by upping the fuel pressure, but only an issue with a stock fuel pump) was worth the .7 ft/lbs you gained by jacking up the fuel pressure? Looks to me like you actually lost power by raising the fuel pressure.
Sure you gained a little power down low, but u actually lost power up top (where it actually matters b/c honda engines mostly make power up top). So you got a taste of the gains you can see by tuning the fuel a little bit, now get it tuned properly (with crome/hondata/etc etc) and see how much you can really gain throughout the whole powerband.

DefconDave

LOL this is Jokes,

Generally a FPR is a good mod if used properly. Tuning without a wideband? is very questionable.

Anytime you get an FPR you need to get a gauge aswell. Otherwise you don't know what fuel pressure you're running. Right?

But as far as fuel goes, it's all about getting the right amount. More is not always better and less is not always bad. Using Chrome to tune works great (to a certain level) but it doesn't mean that you can run a stock reg.

Expecting 5-10whp by just adding an FPR with no other mods or tunning is wishful. I would start with the basics first I/H/E.

Good Luck

imported_plzbeleiveit

i think paying 100+ bucks on a FPR to get .7 Ftp is just stupid. pay an extra 100 and get cam gears and make an extra 10hp and 10ftp.

zeeman

iTrader: (1)

why not?
With stock injectors, i see no need for an adjustable FPR. You can control the injector duration in crome, which is more than sufficient. To my understanding, raising the fuel pressure decreases the efficiency of the (stock) fuel pump. And will only yeild an overall increase/decrease in fuel delivery, not controlled like with crome/hondata/AEM/motec. What SaYjAiBaO posted is a perfect example of this.
Now, if you are running different injectors (DSMs, RC, Precision, Seimens) it may be necessary to run a lower/higher fuel pressure. I like to run what the manufacturer recommends (IMO they would know best). And hondas have their fpr's set to a certain psi for a reason....right?
I've used stock FPRs on many cars (tuning with crome, with stock or other honda injectors) with absolutely no problem, quite good success actually. I'm using a stock fpr/injectors/pump on my car (and have been for years), but that will change soon b/c i'll soon be running larger injectors/pump and don't know how well these injectors will work with the stock fuel pressure (550cc precision low-impedance).

$100 on a FPR?!?!?! You can get those B&M ones (where you mod the stock FPR) and a guage for $100.