"Crushing" A Fuel Pressure Regulator

[b5a4erik]

Hey all,

Can someone please tell me how I would "crush" a FPR?

looking to get more pressure out my stock.

[Nollywood]

It's a pretty common, cheap mod. You carefully put a dimple in the top centre, of the FPR.

The purpose is to increase the preload on the internal spring, pretty much like screwing in the top of older, external turbo waste gates.

[redline380]

I can tell you how to buy a new one. Just pony up the cash for doing it right.

[Nollywood]

I can tell you how to buy a new one. Just pony up the cash for doing it right.

Lol!

[b5a4erik]

Haha is this procedure easy to do accurately? Or does it make more sense to drop $ on it?

I am on a budget.

[redline380]

$31 after shipping- http://www.ebay.com/itm/like/1719678...&ul_noapp=true

Note- Your argument against buying such an important piece on Ebay because it could lead to destruction of your engine is moot considering the fact you are wiling to "modify" your stock one, which could potentially lead to the same ill effects as a questionable Ebay product could.

[b5a4erik]

Yo man,

I hear your point and partially agree with it, but I trust myself to make a better meal then any fast food joint. Similar to modifying my car compared to eBay.

If I were to get one it'd likely be: https://store.034motorsport.com/drop...ted-5-bar.html

[MetalMan]

I can't help but wonder why you're trying to get more fuel pressure?
Are you custom tuning and you're looking to reduce injector duty cycle without buying new injectors?

The ECU expects a certain fuel pressure. Messing with that without altering the tune is a "bad" thing especially on a car with a narrowband O2 sensor (like the AEB). It will cause the engine to run richer.

[b5a4erik]

k03 to k04.

And I must say: I did get a GodSpeed turbo, which is certainly not a name brand / five star dining experience. So although I would rather cook myself a meal, there are times where fast food is the way to go.

I am running a ko3 tune, but with the k04 I figured I'd need more Fuel Pressure.

[Wet0willy01]

...

[DoesntCare]

k03 to k04.

And I must say: I did get a GodSpeed turbo, which is certainly not a name brand / five star dining experience. So although I would rather cook myself a meal, there are times where fast food is the way to go.

I am running a ko3 tune, but with the k04 I figured I'd need more Fuel Pressure.

As MetalMan said, your tune and ECU will expect a specific pressure in the rail, and altering that without modifying the tune can cause serious issues.

Yes a K04 can benefit from the extra fuel over stock, but only when you are running the software that calls for it.

[GrapeBandit]

crush fpr in hydraulic press, reinstall.

install mbc.

turn up the boost.

report back

[M-Hood]

increasing the fuel pressure means your injectors are spraying more fuel while they are open, even at idle. Your fuel trim is going to get richer which means the ECU is going to need to pull pull more fuel out. Same thing as if you were to install slightly larger injectors.

[b5a4erik]

I know ideally I'd have a k04 tune.

However, with my k03 tune, the k04 turbo would still be looking for a but more fuel, yeah?

[redline380]

I know ideally I'd have a k04 tune.

However, with my k03 tune, the k04 turbo would still be looking for a but more fuel, yeah?

You are going about this nearly the worst way possible.

[M-Hood]

I know ideally I'd have a k04 tune.

However, with my k03 tune, the k04 turbo would still be looking for a but more fuel, yeah?

K03 or K04 with K03 tune is still going to get you K03 power.

[Turbo_B5]

did you rebuild this "godspeed" turbo with upgraded bearings?

[Davdraco1]

Your turbo doesn't want more fuel. It's a turbo that just blows air. Your ECU might want more fuel but that problem is only solved with a tune. Do it right. You say you on a budget but you'll waste money doing this mod in the long run.

[b5a4erik]

I appreciate all the regards.

Your turbo doesn't want more fuel. It's a turbo that just blows air. Your ECU might want more fuel but that problem is only solved with a tune. Do it right. You say you on a budget but you'll waste money doing this mod in the long run.

The reason I got the k04 was because it was the same price as the k03, and I figured I'd rather get k04 now and set myself for a tune in the future. p.s lol I know the turbo itself doesn't need fuel, just air, I was talking about it's connection with all the other parts of the car that would need fuel.

did you rebuild this "godspeed" turbo with upgraded bearings?

Nope, didn't rebuild the GodSpeed. Plan on rebuilding (actually, getting rebuilt) my old k03 that I took out of the car.

K03 or K04 with K03 tune is still going to get you K03 power.

Yeah, I figured the k04 would essentially be just an over-qualified k03 ~ pretty much what I was intending this setup to be.

You are going about this nearly the worst way possible.

You're a smart dude, but saying that doesn't help me. Sure I may be, but if I am advise me on how to do it right. What's good brotha' man?

[Seerlah]

What you do is cap off the return line after the FPR. Should provide all the fuel pressure you need.























In all seriousness, don't touch anything. Swap in the ko4 and run it on your current tune. When you get a tune, just use hardware that the tune calls for. If anything, you will most likely end up needing "less" fuel pressure (happens a lot with tunes for a ko4). At that point you pick up an adjustable FPR, place a gauge on the feed line before the rail (5/16" barb), and dial it to get your ideal A/F ratio.

[b5a4erik]

hehe,

So then I'll run it as is for a bit and see how that goes. I need to get Vagcom so that I can decipher my car much better.

[Seerlah]

Car is soon to reach its 20th year anniversary. Car is old and questions you have most likely have been answered for any aspect of it, including yours. Don't overthink it and just follow advice of those who can grant it credibly. No need to do anything at your current juncture with your setup.

If anything, make sure the wategate actuator has proper tension on the wg flapper prior to installing your turbo. Because it is much easier to adjust out the car than in. You want the rod to have an extra 2-3mm extra tension. That means the flapper completely closed, then you compressing the spring inside the actuator by pulling on the rod for that extr 2-3mm rod extension tension. This will ensure the wg stays closed before it is supposed to open vs having exhaust gas squeeze past a not fully closed flapper. The exhaust will still push against the flapper, which is why you need that extra tension to combat it and keep it closed till it is supposed to open. This is the reason many experience boost pressure loss and/or increased lag after installing or swapping a turbo.

Swap the turbo in and leave it alone. Then when you have the opportunity to get a tune with fueling for it, we'll then help you at that point. All you need to do is ask. Because at that point, tune will most likely mess wih you with reason and remedy posted in my initial reply. Dont overthink it, because there isn't really much to think about. It isn't as complicated when it comes to modding this car (no matter the aspect), though many can easily create that situation themselves (I too am guilty of this in the past, and learned from my own mistakes). So from words of advise I follow myself and at times can be too hard headed to take heed to, don't overthink it (and do yourself a favor). We would not lead you in the wrong direction.

[Turbo_B5]

Its probably gonna blow unless you get some upgraded internals into it. Why would you waste money on rebuilding the k03?

It's easy to rebuild the chinese turbo.


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[b5a4erik]

Thanks, Seerlah.

King_, well, it seemed pretty difficult from my perspective, lacking proper tools, blowtorch, bench grip, etc. So I just put it in there, took out the k03 to rebuild as a backup... incase the GS does blow, although I am hopeful that it doesn't.

[Turbo_B5]

King_, well, it seemed pretty difficult from my perspective, lacking proper tools, blowtorch, bench grip, etc. So I just put it in there, took out the k03 to rebuild as a backup... incase the GS did blow, although I am hopeful that it doesn't.

you dont need torches or fuck all to rebuild the k04. Just a 10mm wrench. it just falls apart cause its chinese. worth the 40mins to do the work and have the thing have more oil flow and less ware.

did you even watch reno's video?

[walky_talky20]

Crushing the FPR can be a pretty accurate procedure. My father does this on his Race Camry's and Race Corolla's (aka RaceRolla's). He does it at idle with the FPR vacuum line disconnected and fuel pressure gauge on the rail. Crush down and watch the pressure come up. When it gets to where you want, stop. Pretty simple.

Sidenote: "RaceRolla" seems like a decent forum handle.

[Avant Nate]

Serious question, has anyone actually ever damaged their car running a K04 on a K03 tune? It flows like what, 2lbs more air than a K03? It has to be within safety margins of any oTS tune out there.

[Bordom]

Serious question, has anyone actually ever damaged their car running a K04 on a K03 tune? It flows like what, 2lbs more air than a K03? It has to be within safety margins of any oTS tune out there.

A lot of the S4 guys run the stock programs on the stage 3 setups for break in, then go for tuning

Everything graciously mispelled by Android

[M-Hood]

Serious question, has anyone actually ever damaged their car running a K04 on a K03 tune? It flows like what, 2lbs more air than a K03? It has to be within safety margins of any oTS tune out there.

Not that I have seen, but then your really not getting all that much gain in hp/tq when running the K04-15 on a K03 tune.

If that is the amount of air the K04-15 flows over a stock K03 then I wonder how much the Billet wheel K03 from Turbo Directs would make seeing they say it flows 20% more air then a stock K03. lol

[b5a4erik]

you dont need torches or fuck all to rebuild the k04. Just a 10mm wrench. it just falls apart cause its chinese. worth the 40mins to do the work and have the thing have more oil flow and less ware.

did you even watch reno's video?

Well, no. I have limited wifi data I can use, so loading a video isn't so much a preferable option (usually). Looked @ DIY writtens instead and saw what seemed to be a complicated process... Know I now

Crushing the FPR can be a pretty accurate procedure. My father does this on his Race Camry's and Race Corolla's (aka RaceRolla's). He does it at idle with the FPR vacuum line disconnected and fuel pressure gauge on the rail. Crush down and watch the pressure come up. When it gets to where you want, stop. Pretty simple.

Sidenote: "RaceRolla" seems like a decent forum handle.

Simple enough process. Also, kind of dope; RaceRolla's... Haha I currently work @ a Toyota dealership, seems like something I'd like to see.

A lot of the S4 guys run the stock programs on the stage 3 setups for break in, then go for tuning

Everything graciously mispelled by Android

Good to know. Car's acting preeeeeeeety weird though.

[andyrew]

Just run your K04 on slightly less boost than your ko3 file. Your tune will adjust the small difference. Then when you have saved the money for injectors and a tune then go that route.


Or get something like an apexi fuel controller and adjust the tune yourself..

[b5a4erik]

Just run your K04 on slightly less boost than your ko3 file. Your tune will adjust the small difference. Then when you have saved the money for injectors and a tune then go that route.


Or get something like an apexi fuel controller and adjust the tune yourself..

Word.