Fuel pump size more than injector size is what determines if you really need an AFPR. With a 190LPH fuel pump I'm sure you'll be fine. I've been running a 190 pump for over 5 years now without any problems.

 

190lph you should def. be fine, anything larger then you'll need to look into a FPR.

i ran a evo8 fuel pump in my 2G no issues at all.

 

Yeah, you usually don't have to upgrade until you get to a wally255 or similar. Injector size doesn't really determine if you'll need an upgrade, as they don't really determine how much fuel is being pushed to the rail. The fuel FPR just returns the unneeded fuel pressure to the tank, so you can kinda see how your injectors don't matter as much, just fuel pumps that throw more fuel and higher fuel pressures.

 

Doesn't the aeromotive FPR that is very popular just bolt up also?!

 

Doesn't the aeromotive FPR that is very popular just bolt up also?!

Where did this come from? We go from suggesting that he doesn't need one, to suggesting one that bolts up? :dunno:

 

It seems the only bolt on regulator is Buschur racings

In his post.

 

^sorry, bad eyes, I didn't see that.

Still, he doesn't need it.

 

Ok, thanks guys.

 

This wouldn't be a bad thought, though, if you do plan on upgrading. I would suggest, especially if you DO plan on going bigger/better, on keeping your eyes open now, start looking for one, you know? The longer you give yourself to look, the better chane you will have of getting a good deal on one...

 

^

Still, he doesn't need it.

And how do you know? You don't know he doesn't need one unless you have a fuel pressure gauge installed on his car and are watching what the base pressure is.

 

Originally I bought a wb190 trying to avoid buying an afpr. Well, at idle the stock fpr was being over run. This made tuning the lower fuel trims difficult, the fp at idle was around 50psi. That was with a walbro 190. Everybody seems to have their own experience with it. The car ran, but tuning it as a d.d. with LTFT and STFT always drifting made it impossible without an afpr.

This unpredictable fuel curve causes big problems when the car was transitioning through Rpms.

This is a non debatable issue. If you upgrade your pump you add an AFPR. It is the RIGHT way to do it

You don't know he doesn't need one unless you have a fuel pressure gauge installed on his car and are watching what the base pressure is.

Burnett03 This statement is 100% true.

 

And how do you know? You don't know he doesn't need one unless you have a fuel pressure gauge installed on his car and are watching what the base pressure is.

How do I know? The same way the moderator knows, nummie.:chair:

Its not rocket science. A 190LPH won't be able to outflow the stock FPR.

I really think its funny you quoted me as opposed to the moderator. Why didn't you jump his shit, especially since he was the first one to say he should be fine?:chair:

 

How do I know? The same way the moderator knows, nummie.:chair:

Its not rocket science. A 190LPH won't be able to outflow the stock FPR.

I really think its funny you quoted me as opposed to the moderator. Why didn't you jump his shit, especially since he was the first one to say he should be fine?:chair:

Sorry, how do either of you know? Just because i call you out on something doesn't mean you need to get defensive and act like an ass.. But seriously you didn't answer, how do you know he doesn't need a regulator? Because someone told you a 190 wont overflow a stock regulator? A 190 can overflow a stock regulator. The only way to know is if you hook up a fuel pressure gauge and see what the base pressure is. If it is not what it should be, 38 on a 1g and 43 on a 2g then you are overflowing the stock regulator and you need a better regulator. Thanks for all the :chair: 's.. I guess that's cool?

 

Fuel pump size more than injector size is what determines if you really need an AFPR. With a 190LPH fuel pump I'm sure you'll be fine. I've been running a 190 pump for over 5 years now without any problems.

How do you know you don't need one? Are you running a fuel pressure gauge, if so what's the base pressure?

 

How do you know you don't need one? Are you running a fuel pressure gauge, if so what's the base pressure?

First off, you two need to knock it off.

Now on with my statement. Just because I've been running a 190 with no problems doesn't mean someone else won't. I'm also running a NT FPR which is a little higher in pressure which should help in overrunning it. Now remember technically a FPR IS overrun, that's why it bleeds it back to the tank. What it should do is maintain a certain pressure and bleed the rest back to the tank. It's possible when you have a fuel pump of a much larger volume in which the FPR tries to hold pressure but can't bleed enough of the supply back to the tank, thus fuel pressure goes higher than it's setting should be.

I didn't say he WOULD be fine. I said I'm sure he will be fine since typically the 190 won't over pressurize the stock FPR. Now with our cars being +teen years old, the condition of the FPR begins to come into question. As stated, the only way to really KNOW is to test it with a fuel pressure tester. That goes for just about EVERYTHING. In order to know correct timing a device is needed, same for electrical issues.

I was giving him a general answer to if he REALLY needs an AFPR. The general answer for running a 190lph pump is NO. Some guys even run a 255 without overrunning the FPR, although it IS more common.

Has that unwound everyone's panties?

 

^^sorry *puts head down*

 

Just because i call you out on something doesn't mean you need to get defensive and act like an ass.. Thanks for all the :chair: 's.. I guess that's cool?

Don't try and call me an ass, then act like a d-bag yourself. If I feel like throwing around a chair for fun, who are you to tell me otherwise?

I guess its also cool to avoid calling out a MOD, too, then right? Just when someone else brings that up?

Alright, I'm off my soapbox.....

 

^^sorry *puts head down*

LOL, thanks 93. We should all be friends on this site since it's a common shared hobby. Sometimes things can seem a bit snippy. I'm just keeping it down to a dull roar.

The Intarswebs is serious business you know.

EDIT: I will state that, the name calling will cease! PERIOD!!:chair:

 

Don't try and call me an ass, then act like a d-bag yourself. If I feel like throwing around a chair for fun, who are you to tell me otherwise?

I guess its also cool to avoid calling out a MOD, too, then right? Just when someone else brings that up?

Alright, I'm off my soapbox.....

O boy.. I wont even touch some of the things you've said. It's not about "calling people out." I didn't see steve's post until you brought it up. Why does something little always turn into a pissy, name calling fest on this forum? I'm trying to get better information out and you feel the need to turn this thread to crap. I was trying to state that all cars are different and the best way to see if you need a regulator is to see what your base pressure is, and then decide if you need or want one. So i'll do the same thing i do to my girlfriend.. "Yes you are right, i am wrong, you are wlays right, and i will always be wrong." Feel better?

 

First off, you two need to knock it off.

I wasn't being rude towards you with my posts. i was being serious, what is your base pressure at?

 

O boy.. I wont even touch some of the things you've said. It's not about "calling people out." I didn't see steve's post until you brought it up. Why does something little always turn into a pissy, name calling fest on this forum? I'm trying to get better information out and you feel the need to turn this thread to crap. I was trying to state that all cars are different and the best way to see if you need a regulator is to see what your base pressure is, and then decide if you need or want one. So i'll do the same thing i do to my girlfriend.. "Yes you are right, i am wrong, you are wlays right, and i will always be wrong." Feel better?

Yes I do!

You're right Burnett, every car IS different. Same everything but not everything will BE the same.

I think we're done here with the debate, ass this and d-bag that...

Burnette, I appreciate the de-escalation.

EDIT: My fuel pressure is right around 43psi with a 1:1 raise base upon the boost/vac pressure.

 

We should all be friends on this site since it's a common shared hobby. Sometimes things can seem a bit snippy. I'm just keeping it down to a dull roar.

EDIT: I will state that, the name calling will cease! PERIOD!!:chair:

Agreed, and 10-4

 

EDIT: My fuel pressure is right around 43psi with a 1:1 raise base upon the boost/vac pressure.

That's a bit higher than what a 1g is "supposed" to be but i don't consider that overrun. Considering you said it's a N/t regulator that's about right. Being that it's a n/t regulator they still rise 1:1?

 

Man, it really sucks to bite the bullet and be the bigger person. I apologise, and stop throwing daggers, yet they are still being tossed...wtf?

 

That's a bit higher than what a 1g is "supposed" to be but i don't consider that overrun. Considering you said it's a N/t regulator that's about right. Being that it's a n/t regulator they still rise 1:1?

Yep! And I believe that is about the correct pressure. I wanted it a little higher because I'm still running 450 injectors.

 

Yep! And I believe that is about the correct pressure. I wanted it a little higher because I'm still running 450 injectors.

I hear ya.. A bit higher pressure will push those 450's a bit further.. It's odd because once you get into the 1600cc range like me you want lower fuel pressure to keep the walbro single pump happy.