All cars are different but for what you got you should be fine. Don't turn the boost up till you get bigger injecters.

Also I wouldnt turn the boost up untill you get a logger so you can monitor your motor. Like he said all motors are different. You could be ok at 14psi but I was having all kinds of knock at just 13psi. I only run 10psi since I cant control my fuel.

so would 10-12 psi be good?, I heard that the stock setting is like 12psi though?

Basically will a fuel pump upgrade even be needed with these parts? If I even turn the boost up it will only be up by 1 or 2 psi or I'll leave it at stock boost. I just want to make sure I'll be safe and not run lean or rich.

It will be needed if you ever plan on turning up the boost or upgrading the turbo in the future. Running rich isn't going to do much to your engine, so long as its not way rich. But I agree that you should get a logger before significantly changing the boost so that you can tell what your engine is doing. I would say that 12-13 is safe.

o ya, I'm probably not upgrading the turbo either or at least for a LONG time, this is going to be a daily driver and I just wanted to upgrade a little. I got a second car to worry about. BTW: 14 PSI would be my max boost. I don't think I'll be getting the logger if 12-13 will be safe because I'll be running that daily. Does anyone have anymore comments?

Since you have a t25 even if you could turn the boost up to your hearts desire, that turbo wont be effecient too much past 16lbs of boost once you get into the high rpm range it will get tired and just blow hot air... I wouldnt go past 14 or 15 lbs on that turbo in my opinion.
Im going to have a 190lph hp fuel pump on mines, and a 1g n/t regulator thats going to add 10 more psi of fuel and run stock injectors and I was told Id probably be safe at like 15 pounds... Im getting a logger though, i want to run like 17 pounds on my 14b as daily driver and stay at those levels... You definitly should be ok with upping the boost by 1 or 2 pounds though even though everyone wil tell you to get a logger... We have 93 octane were i live, I dont know about where you live.

Oh and yea a fuel pump upgrade is needed I mean why not have it back there,
unless you dont plan on ever turning boost up... And from my knowledge full
pumps wont make you run rich or change gas milage, it just is capabable of exceeding the amount of fuel flow of the oem pump when you get on it..
Injectors and fuel rail, and fpr upgrades will affect gas milage though.
I would get it, I just bought a high pressure 190lph from lightningmotorsports.com
for 96 bucks...(and yea i didnt know they made high pressure 190s either! )

nightspeed87 said:

full (fuel?)
pumps wont make you run rich or change gas milage, it just is capabable of exceeding the amount of fuel flow of the oem pump when you get on it..

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Yes, its very possible to run rich with only a Walbro 190. I've done it. Its called fuel pressure regulator overrun. And its real and CAN happen. Believe it.

not on a 190, you wont get over run unless its a 255.. Its possible the pump richens you up a little but it generally doesnt make you run rich. Your car mustve had something else going on making it run rich.

Nope you're wrong. Simply put fuel pressure overrun CAN occur with only a 190 pump. I'm not the only person to have this happen. PM "Oldman" and ask him if you don't think its possible.

You think I'll be safe with my mods?

This is really bothering me, I don't know if I should order it or not. The teach guide even has it as a later on step but I want to turn my boost up to 12 or 13psi safely, but then I don't want to run to rich and risk fuel pressure overrun. Will I be safe with my mods? what you think, yes or no?

do you know how many ppl on this site run performance fuel pumps with stock regulators, if over run is happening from a 190 then somethings not right there, because ive had a wiseman tell me himself that 190 wont cause overrun. If you had overrun maybe your fpr wasnt operating correctly but it shouldnt cause over run I have a high powered 190 and its just fine, you should not see over run unless you get a 255 or bigger, then yea youd def need a afpr... I dont everyone has their own opinions , but I think a fuel pump mod is always the best thing to do before cranking boost even if your not cranking it that much, its one of those things that it doesnt hurt to have . ( Unless its bigger than 190)

rb97GSX said:

This is really bothering me, I don't know if I should order it or not. The teach guide even has it as a later on step but I want to turn my boost up to 12 or 13psi safely, but then I don't want to run to rich and risk fuel pressure overrun. Will I be safe with my mods? what you think, yes or no?

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12-13 psi is not gonna hurt you. Ours stock is usually closer to 14. (2g's that is)
You'll be fine. Dont get the pump unless you plan on getting a bigger turbo later on. Before that I think you should get a logger and see whats goin on with your car. Once you decide to upgrade to a bigger turbo, if you do, you can go get bigger injectors, fuel, pump, and tuning such as SAFCII or Dsmlink. If you are really worried about it go spend 70 bucks and get a used logger setup. Good luck!

so I'll get the 190, probably a data logger along the way. With it what can I do? Will it just record data or can I actually make changes with it?

A datalogger will just record. You will need an SAFC or DSMlink or another Piggyback ECU to control it.

Will an afc really be worth it an benefit me with these mods?

because this is basically as far as I'm going with mods, I just want to know if an afc will benefit me with what I got, I don't want to waste money like said above.

rb97GSX said:

because this is basically as far as I'm going with mods, I just want to know if an afc will benefit me with what I got, I don't want to waste money like said above.

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Spending the money on the fuel pump would be a waste. If you get the safc you can lean out if you are running rich. With this and the datalogger youll be set for tuning unless you get into heavy modding. If you dont plan on ever upgrading your turbo i probably would just save my money (imo).

nightspeed87 said:

do you know how many ppl on this site run performance fuel pumps with stock regulators, if over run is happening from a 190 then somethings not right there, because ive had a wiseman tell me himself that 190 wont cause overrun. If you had overrun maybe your fpr wasnt operating correctly but it shouldnt cause over run I have a high powered 190 and its just fine, you should not see over run unless you get a 255 or bigger, then yea youd def need a afpr... I dont everyone has their own opinions , but I think a fuel pump mod is always the best thing to do before cranking boost even if your not cranking it that much, its one of those things that it doesnt hurt to have . ( Unless its bigger than 190)

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And how many of thoses people have a fuel gauge installed with their 190?

Since the stock FPR is a non-adjustable unit, technically speaking, any pump that flows more volume than the stock pump will overrun the stock FPR. Alot of people are running the 190 and claiming no overrun for several reasons.

1. They do not have a fuel gauge.

2. The degree of overrun on the particular car is insignificant enough to be ignored.

3. Most people only care about WOT and FPR overrun is only a idle and part throttle thing, just go back and read threads from a year and a half ago and see how many users were claiming they're running the 255 and "they don't feel any problems.

I do agree that most can get away or live with a 190 without an afpr but that is different than "190 will not overrun the stock fpr".

Im going to have a 190lph hp fuel pump on mines, and a 1g n/t regulator thats going to add 10 more psi of fuel and run stock injectors and I was told Id probably be safe at like 15 pounds

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I'll not comment on the effects of using the NT fpr because I don't know but if what you're claiming is true that it will increase the FP by 10 psi across the board, explain how will you not run rich without tunning capability, you might as well throw in 550s without a safc.

jibberishballr said:

Spending the money on the fuel pump would be a waste. If you get the safc you can lean out if you are running rich. With this and the datalogger youll be set for tuning unless you get into heavy modding. If you dont plan on ever upgrading your turbo i probably would just save my money (imo).

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So what you mean here, don't get the logger, or afc?

oldman said:

And how many of thoses people have a fuel gauge installed with their 190?

Since the stock FPR is a non-adjustable unit, technically speaking, any pump that flows more volume than the stock pump will overrun the stock FPR. Alot of people are running the 190 and claiming no overrun for several reasons.

1. They do not have a fuel gauge.

2. The degree of overrun on the particular car is insignificant enough to be ignored.

3. Most people only care about WOT and FPR overrun is only a idle and part throttle thing, just go back and read threads from a year and a half ago and see how many users were claiming they're running the 255 and "they don't feel any problems.

I do agree that most can get away or live with a 190 without an afpr but that is different than "190 will not overrun the stock fpr".


I'll not comment on the effects of using the NT fpr because I don't know but if what you're claiming is true that it will increase the FP by 10 psi across the board, explain how will you not run rich without tunning capability, you might as well throw in 550s without a safc.

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well another wiseman told me with the 190 i will not have to worry about fuel over run, and if it is insignificant overrun then its insignificant enough to not even be conscerned about. on a 190... I do believe 255 would cause over run to the point itd be significant but i dont know because i dont own a 255.
Now My car is in a full engine build stage and its going to be down untill the build up is done, so yea i dont have a safc2 yet but i will be def getting one, and i never said i wouldnt run rich, it would probably run pig rich without a safc, but since im not driving my car yet then im not worried about it, and by the time my cars done ill probably have one and a logger. And the n/t regulator actually makes the 450s flow a rate of 505 exactly not 550s. To compensate for this I also contemplated on a hacked mass. But at any rate I am def getting safc and a logger before i do to much driving on it when its done.

rb97GSX said:

So what you mean here, don't get the logger, or afc?

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the afc you can do without if your not raising boost too much or adding bigger injectors or anything, but a afc could still help you because tuning is still tuning no matter what boost your running, and you may still get a little out of a afc. The logger I think you should get, more so than the fuel pump because since your not really going to raise boost too much, but I still think you should get a fuel pump because in my opinion wont hurt to have a 190. Just dont go any bigger than that. But def get a logger so you know whats going on.

so basically get the 190 and the logger. Then get the afc it starts running bad? because I was going to say why not skip the 190 and just raise it by like 1 psi but I guess I need it. So like I said. Get the 190 + logger and then worry about the afc is things go bad?