I am going to get a fuel pressure regulator but I was curious which one every one would prefer. b@m or aem I want the aem but I dont know if I am just paying for the name or quality. need some input or should I get a presure regulator with a vfac that is my plan. the vfac I can adjust my fuel pressure on cant I or no well I need some setup here thanks.

 

Jake, your grammar sucks ***.

B&M PR =
No, you can't change fuel pressure from a "vfac," or from a vafc either.

 

sorry ed I am dumass when it comes to gramer and spelling.

 

I believe the AEM will let you lower pressure as the B&M can only raise pressure.

 

the AEM comes with three interchangable jets that alow you to go
all the way up to 110 psi or something like that, i have it on my car
and i can check the jets to see exactly what the max is

 

Not true... You have a fairly large range of adjustment with the B&M unit. I have one I know! It may be true that the range on the AEM is bigger but I cannot comment on that.

The B&M unit does require you to get your hands a little dirtier (you have to modify your stock reg) but I have no functional complaints about it.

If I had to choose again I would still get the B&M reg over the AEM.


[Modified by BABY NSX, 12:05 PM 5/29/2002]

 

B&M works.... I'm sticking with it.

 

i have a B&M that i was gonna use on my old 89 , but never installed it...was there any performance gains with it guys...?

 

Yes, that is fine. But you missed my point. You cant lower the pressure with the B&M unit. Your lowest pressure is close to stock.

I have the B&M also, and have little to complain about and if I was out to get another FPR, I would get this one over the AEM(Its just ugly to me) but the fact is, the AEM can lower the pressure beyond stock and raise it way beyond stock(But remeber higher pressures will kill your fuel pump faster) I have heard my stock pump whine and groan with my B&M crank up to about 70-75psi.

 

Umm, I did not know that. I was going to lower my stock fuel pressure the other day on the dyno but I didn't.

 

I have the AEM and I like it......works well.....plus its that cool *bling,Bling* anodized red....

 

Incorrect. you can lower the pressure below stock, but thats primarily dependant
on the fuel pump you have. Larger pumps will cause the pressure to rise.

 

aem has different orifices to allow more fuel to flow thru it, something which
you can only control on the stock FPR by drilling extra holes

 

Sgt- you also missed my point, or I am explaining it wrong.

I will use my own B&M regulator as an example.
I needed to lower my fuel pressure and I turn the regulator all the way loose to the physical limitation of the regulator (So that I cant lower the pressure anymore) Fuel pressure is at where my stock (unmodified regulator) was.
Makes sense if you think about how this regulator works-All it does is use a spring to push down on the diapragm, twisting the screw compressess the spring and in turn the spring pushes harder onto the diaphragm. Loosen the screw and the spring does not push as hard on the diaphragm. But I was still running to much fuel pressure with the spring at the loosest(lowest pressure) position.

Now I drill a hole into the regulator(B&M) to allow more fuel to return to the tank and I successfully dropped my fuel pressure lower than stock.

With the AEM you dont need to modify the regulator to lower the pressure as with the B&M. As what Sakai said, there comes to a point where the fuel pump will determine your pressure and you cant lower it anymore, at least with the AEM it will let you get to that point, the B&M regulator will stop at around stock pressure (or just a little bit less).

 

Correct, by drilling holes more fuel is able to flow through the regulator lowering the pressure. With an AEM you dont need to drill holes to lower pressure. B&M fuel regulator was designed to raise the stock pressure not lower it.

 

get AEM
direct bolt on
no fuss, no mess
easy to adjust

 

t,

Not to disagree with you but with my B&M I can set the FP well below the stock setting. Perhaps they gave you a stiffer spring then me, or you cut the stock FPR differently (I can see how this might change the minimum FP).

I'm not defending the B&M over the AEM, as I suspect the AEM is actually a more versatile piece. But the price difference is significant and the B&M works for me Maybe one day when my set up is a little more radical I will have to change but for my mild set up I think I’ll be fine, as would others.

 

You didnt explain it wrong.
let me put it this way, yours is the first I have ever heard of that did that.
But its rare when you have to go lower, and when you do, you usually need
something bigger than stock to regulate pressure anyway.

 

i got injectors.

 

[Incorrect. you can lower the pressure below stock, but thats primarily dependant
on the fuel pump you have. Larger pumps will cause the pressure to rise.[/QUOTE]


I think this is the problem with my setup, I have a walbro intank and when i try to lower my B&M to idle my 370's it wont go below 45......Is there any way to remedy this??? I need my fuel pressure set at around 30-35 to be able to idle and drive good with the 370s.. Any Suggestions???

 

AEM

 

My JR FMU wont go below like 50... at least thats what my B&M fuel guage says. I know this isnt the case with other JR FMU's, so its a unique situation with my car... or my guage must not be correctly calibrated.

Anyways, B&M gets the job done, but if you want to get more in depth with tuning with a piggyback, then by all means go AEM. IMO, its the best you can get as far as FMU's go.

 

The JR FMUs have a preset of 50 psi at 0 vac to help prevent tip in detonation since they produce boost at idle. I have the b&m and can set my pressure as low an 26 psi with vacuum about 34 at 0. If you have an upgraded fuel pump such as the walbro, it's my experience, that you can't get your pressure lower than 48 psi with vacuum.

 

None of the above..

SX regulator

 

You dont want to set the pressure below 40psi or else there will not be enough
pressure to properly atomize the fuel. you need to remove some of those
hacks on your fuel system.