rxmiles

iTrader: (11)

I've been searching for a few days now with no clear resolution, so I'm finally posting with hopes that some one will chime in.
I have a stock 93 Touring that I have down for service until I can finish all the reliability mods. So far so good, but I want to delete the FPD in favor of a FPR.

I can't find info on people doing this to a stock car. All I need is to get rid of the stock failure prone fuel pulsation damper and add some nice AN fittings, braided fuel lines and a compact FPR, which I am looking at the Aeromotive 13129 http://www.ebay.com/itm/Aeromotive-13129-EFI-Adjustable-Fuel-Pressure-Bypass-Regulator-30-70-PSI-/301540294358?hash=item463533bed6&vxp=mtr
I am seeing it raises fuel pressure on a 1:1 ration... this is what I don't know to be wanted in a stock car. I don't mind running a bit rich but I can't tune and a standalone is not in the books for now.

The reason I want to go this rout rather that simply eliminating the FPD is due to the dampening part. The FPR has a built in damper.

Scrub

iTrader: (25)

So you're going to remove the FPD as well as the OEM pressure regulator in favor of some fittings, extra fuel line and an adjustable aftermarket pressure regulator? Seems like a lot of extra complexity for a stock car. The Stock pressure regulator and pulsation dampener are two separate things, the PFD is located on the primary rail and the OEM pressure regulator is on the secondary. Why not just install a recall kit, which includes a new FPD?

If you're set on removing the pulsation dampener all together Banzai created a how-to for eliminating the FPD, while retaining the stock pressure regulator....

FD3s Pulsation Damper Elimination

-Dan

GoodfellaFD3S

iTrader: (213)

You can't find info on people doing this to a stock car, because it makes no sense to do it to a stock car

ptrhahn

iTrader: (9)

The car has a FPR and a FPD, and the two aren't interchangeable in function or location.

I would leave the stock FPR alone, unless you've upgraded to a fuel system that requires an aftermarket one.

With the FPD, you can delete it, though the cars are 20 years old—simply replacing it with a brand new stock one would probably hold you in good stead for a long time.

evo_koa

iTrader: (2)

correct

TomU

iTrader: (11)

Cost could be one reason. Replacing the stock FPD and FPR is like $250, however any savings from an aftermarket FPR will probably get eaten up by hardware connecting it to the stock rails and fuel lines.

The stock FPD needs to be replaced or deleted, but what about the FPR. Is that usually GTG? If it is, there certainly is no cost savings, esp if you delete the FPR.

IRPerformance

iTrader: (41)

Leave it alone. I've actually never had a stock regulator fail. If anything buy a used low mileage one off someone that upgraded. The fuel pulsation damper however, should be replaced with a new oem piece or eliminated entirely.

Sgtblue

iTrader: (16)

This was my logic a few years ago.
Not sure, but I think just a new FPD will run a little over $100. Not that bad for piece of mind IMO.

BTW rxmiles, some chance I may trailer the car out your way this year for some mountain driving. Love that area.

TomU

iTrader: (11)

FPD from Malloy is $135 (think that may incl shipping). FPR is about the same, so both together > $250, but sounds like the FPR is GTG.

ZE Power MX6

iTrader: (157)

I actually did this couple years ago, deleted the stock FPR and FPD using Garfinkle adapters. I ran the feed line to the secondary by the firewall with a 90deg fitting, and a 120deg out the primary to a Aeromotive FPR that is mounted on the front of the UIM. I did that so I can run on stock ECU and secondary till the next available tuning session, then I upgraded to FFE rail with 2000cc secondary and PFC, with the FFE rail an easy direct drop in.

rxmiles

iTrader: (11)

All good, but the there's two reasons I want to replace the stock FPD, one is cost and the other is reliability, the rest is just a bonus. Peace of mind is important as well. We've all seen the cost of neglecting the stock FPD and replacing it with a new unit is great but there's the cost factor. I might just replacing the fuel pulsation damper with a new unit as most of you suggest.

I'm taking it a step at a time and thought I might upgrade since I'm replacing the injectors, vacuum job, water pump and fixing the wiring harness. Cost isn't a huge issue and I'd rather not eliminate what seems to be a rather important part of the fuel system.

Sgtblue that would be great, the mountains are fun. Not only can you go to pikes peak, but you could visit Boulder, Colorado it has the flatirons and some great twisty mountain roads Just watch for bicycles.

Sgtblue

iTrader: (16)

Yep...a lot of fun. From a few years ago...I think somewhere on Hwy 7. Not seen there is the Boxster S that was pacing me for about 20 miles.

rxmiles

iTrader: (11)

I like giving Porches and Subarus a hard time.... All you see here haha

Any ways for now I'm replacing the FPD and researching a bit more to later on upgrade to aftermarket FPR

JTurtonRX_7

I have had a stock FPR fail at like 140k miles. Started spraying fuel out the vacuum line. Replace with new for a stock car if you are worried.

ptrhahn

iTrader: (9)

Aftermarket FPRs are probably going to fail sooner than an OEM one. On some things it's the case of course, but don't always assume OEM = ****.

Monkman33

iTrader: (28)

Recommended FPR for stock car? Stock.

Just make sure you have all the updated parts (ie fuel system recall components)

Done. Think about it again in 100k miles or more.

SA3R

FPR = Fuel Pressure REGULATOR.

FPD = Fuel PULSATION DAMPENER

They work differently and are not interchangeable in function.

The second issue is you already have a rising rate REGULATOR in your stock car- it is an electrical device that increases voltage to the fuel pump as boost/revs increase. This increases fuel pressure to cope with boost.

You should not add a second (mechanical) regulator to a stock car that already has the stock (electric) regulator in place and functioning because that could result in all sorts of mishaps and potentially a blown engine. And a stock car does not need any extra enrichment- a stock car runs damned rich as it is anyway, assuming you're using the stock ECU. A functioning stock system should be left alone and not tinkered with for the sake of people's perception of "adding reliability".

The best course of action for a stock car, if you're worried about the stock FPD is to replace it with a new one and then schedule a replacement for that one on 40-80K time if you're worried.
Second option is delete the FPD altogether, although I personally am not a huge fan of that but people say it works...

rxmiles

iTrader: (11)

I understand that

I might have explained my self better...That could have helped. The car is mostly stock with reliability mods/upgrades. The FPR and the FPD work great for stock purposes when maintained and replaced it time. An aftermarket unit integrates both systems in a compact and affordable package. We know the stock system raises the fuel pressure under boost. I mostly thought a simpler way could be made.

I do have a friend locally that has the same setup I have (stock car with reliability upgrades) but he is using an Aeromotive regulator to take charge of the fueling needs. I guess I will wait until his is done and see the results and if his works I will follow in his steps and share with you guys.

Simply removing the FPD seems rather lazy and not proper

Phu5ion

rxmiles, what did you end up doing? I'm in pretty much the same boat at the moment and while Banzai Racing and others have said there is no negative effect of eliminating the FPD, Banzai's website makes it sound like it's ok to eliminate the FPD once you've upgraded the FPR to an Aeromotive, which I haven't done.

Granted, I haven't smelled fuel, but the chassis has 105k miles on it and 30k on the engine, but I can't tell by the engine rebuild invoice if they put in a new FPD. As far as I know it's the original FPD and that scares the **** out of me.

rxmiles

iTrader: (11)

I ended up replacing it with a new one. I could have gotten an Aeromotive one for the same price w/ built in fpd but the stock one works. It's a stock car. I know banzai is a reputable company and others that say that there's no I'll effects are as well. Thing is Mazda hired highly paid intelligent people to put the car together and made compromises whenever possible to cut production costs such as "low quality" plastics etc. If they saw it necessary to add a part that is "seemingly useless" at a large expense (figure, costs after thousands of cars) and I believe they used it until production ceased in the early 00"'s. I'd keep the fpd whether stock or after market.

j9fd3s

iTrader: (3)

most EFI cars run a pulsation damper.