walbro 190, how much psi?

[boostedbrian99]

I have a question on the walbro 190 fuel pump. I have done research on here about the walbro 190 fuel pump. I see that everyone is saying they are good for about 400hp. My question is what psi is maxing that pump out? My current set-up I have is a 99 gst. It has a BIG16G and a greddy rs Bov. Also a 3in cat back. I am running 16 psi. I would like to run about 20-21 psi on my rebuild. The thing is I dont know if I need a 255 and a FPR or just a 190. I see alot of forms saying the HP they are good to but not the Psi they are good for. Also the fuel injectors. Which should be perfect for 20-21 psi? I am getting a logger soon and I just need some help on the fuel system. Like before my goal is around low 20's. I am just afraid of getting the 190 and its only good for like 19 psi. Any help would be great.

 

[boostedbrian99]

I think I will go with the 255. But is it ok to drive the car for about a week with the 255 fuel pump and no regulator. not boosting just driving real easy. I have to wait about a week for my next pay day. Or is driving period on a 255 with no regulator a big no no?

 

[h8r]

You will prob. wash the cylinders with TOOO MUCH Fuel..I would not do it!

 

[daren_p]

and just to make it clear the 190 does not need a FPR right? Also I hear alot of guys saying I need a install kit for the 190. Is that true? Thank you so much. I would just like to run 13's with this setup at 20 psi. Think that set-up would be fine?

Also daren p. said" Depending on who you talk too you'll need somewhere between 40-44 lb/min of airflow to max that pump out. On a B16g you average setup won't make this kind of airflow at the level of boost you plan on running (B16g's usually max out around 42-44 lb/min but this is running 25+ psi, cams, SMIM, head work etc).".

But this graph shows for 20psi ---Walboro 190lph

10psi = 46.48lbs/min
11psi = 45.89lbs/min
12psi = 45.26lbs/min
13psi = 44.58lbs/min
14psi = 43.86lbs/min
15psi = 43.09lbs/min
16psi = 42.28lbs/min
17psi = 41.43lbs/min
18psi = 40.54lbs/min
19psi = 39.60lbs/min
20psi = 38.62lbs/min
21psi = 37.60lbs/min
22psi = 36.53lbs/min
23psi = 35.42lbs/min
24psi = 34.26lbs/min
25psi = 33.06lbs/min

Says 20psi 38.62lbs/min. So does that mean the pump will or will not work. I am just alittle confused on the graph and how that all works, im sorry.

As Nathan had mentioned, rewire any fuel pump you descide to run & it will even help out with the stock fuel pump. Pump flow is directly related to voltage & like mentioned, the voltage from the factory wiring is pretty low.

While I advise to rewire the pump, the 190 will more then likely still support a B16g @ 20 psi. If your still running a stock SMIC. cams, intake, head etc. expect flow @ 20 psi to be around 30 lb/min.

For the poster who mentioned you need internals for 20 psi, this is incorrect. Sure forged internals are never a bad idea but the stockers have made 400 whp without issues & have been pushed much past that as well without issues. At 20 psi on a B16g you will be much less then this without all the other mods that effect VE. Once you plan on running 20 psi + I'd recommend a set of ARP head studs, just to be on the safe side but it looks like you already have this area covered anyways. As a side note I run 22 psi daily & know others who have run 24-27 psi daily, all with larger turbos on stock 7 bolts.

As for the FPR Aeromotive makes a nice unit & is what most DSM's use. They usually go for around $135 but expect to spend around another $100 for an install kit. If you install the 255 pump without an FPR your issue with over run won't happen during WOT conditions as more fuel is consumed (injected to the motor) so not as much has to be bypassed by the stock regulator & returned to the tank, so the stock FPR will be able to keep up. The issue of over run & rich conditions happens at idle & part throttle.

 

[speedy13]

I would use a AFPR even with a 190, for sure with a 255. Your car will be more tune friendly and you'll get more consistent fuel trims. Although some people can run the 190 without problems, some do run into fuel overrun at idle and part throttle and that can make the car not fun to live with on the street. you've already got a good foundation, why not finish it up right. like forementioned, 550's will do but bigger injectors allow for more growing room. You will of course need to compensate for bigger injectors, and the safc alone will start to fall short on injectors bigger than 650's. If you don't want to mess with tuning you could always get a keydiver chip with a eprom ecu and go that route. His chips get pretty close and will be a good tune for the street. you can get stock evo 560's real cheap from a evo ownwer who has upgraded, you can also buy a bolt on AFPR for about 150 bucks. Not as nice as the aremotive, but it will do. I think if you shop around, you can get a decent fuel setup for about 500 bucks.

I got my eprom ecu already socketed for 250. the AFPR for 150. fic 750'cc for 150,safc for 150, custom chip for 40 bucks(da hookup),and wally world 190 for 100 bucks. thats 840 bucks, damm. I put alot of money in this bi***...seriously though, if you shop around you can get decent deals. people sell used 190's for like 50 bucks, you can buy a set of evo injectors for 100 bucks if you look hard enough. 150 for the AFPR and about the same for a used safc, and whaulla, you've got yourself a fuelsystem. Now you can save up for bigger injectors. good luck with it.

 

[boostedbrian99]

Aeromotive A1000 Fuel Pressure Regulator : -6AN and a install kit is all i need to install the fuel regualtor? or something else to?

 

[boostedbrian99]

While I advise to rewire the pump, the 190 will more then likely still support a B16g @ 20 psi. If your still running a stock SMIC. cams, intake, head etc. expect flow @ 20 psi to be around 30 lb/min.
QUOTE]

My expectations for 20psi will not go higher for a couple of years. ( I HOPE ) but for sure you think the 190 will handle 20psi? just as long as for sure it will handle 20psi ill be happy for now.

 

[speedy13]

yes.rewire it for insurance and it'll be fine.

 

[daren_p]

While I advise to rewire the pump, the 190 will more then likely still support a B16g @ 20 psi. If your still running a stock SMIC. cams, intake, head etc. expect flow @ 20 psi to be around 30 lb/min.
QUOTE]

My expectations for 20psi will not go higher for a couple of years. ( I HOPE ) but for sure you think the 190 will handle 20psi? just as long as for sure it will handle 20psi ill be happy for now.

As mentioned a rewired 190 pump is good for around 400 whp. To see 400 whp on a B16g you will need to run more then 20 psi (~25 psi), cams, fmic, SMIM, etc. so you'll be good for awhile

 

[hopwoodp]

Daren_p

I few years ago, on my old setup (EvoIII16g, 190 - not rewired, 660cc injectors, dsmlink, rre mbc, Apexi catback and a k&n air filter) I ran 28 psi WOT shifting and no fuel cut but, ran a little lean but, not exactly sure of the numbers.

With my setup now, I run the 190 rewire,1000cc injectors and boosted 25 psi without going lean.

 

[boostedbrian99]

Ok guys I am going to order the package from extreme psi. Apexi neo,680cc injectors, walbro 190lph fuel pump. I thank you again for all your help. I will tell you how the car runs when I get them. Thanks -BRIAN-

 

[h8r]

Extreme PSI is a great company to deal with, fast service..and most things are in stock and ready to go! ust spent almost 1000 bucks 2 days ago and the parts arrived next day!

 

[daren_p]

Daren_p

I few years ago, on my old setup (EvoIII16g, 190 - not rewired, 660cc injectors, dsmlink, rre mbc, Apexi catback and a k&n air filter) I ran 28 psi WOT shifting and no fuel cut but, ran a little lean but, not exactly sure of the numbers.

With my setup now, I run the 190 rewire,1000cc injectors and boosted 25 psi without going lean.

Yes, that probably sounds just about right. If you check out the charts linked above a non rewired 190 maxes out around 33 lb/min at 25 psi. As your boost pressure rises, inturn rising your fuel pressure, your pump flow decreases. 28 psi, being 8 psi above his planned 20 psi is the potential difference of about 8 lb/min or 80 hp (though your boost maybe dropped abit less then 28 psi as the rpms went up, as 16g's seem to usually be able to hold around 25-26 psi max). So given the info on that setup, I would say running lean under those conditions would be expected.

 

[hopwoodp]

Yes, that probably sounds just about right. If you check out the charts linked above a non rewired 190 maxes out around 33 lb/min at 25 psi. As your boost pressure rises, inturn rising your fuel pressure, your pump flow decreases. 28 psi, being 8 psi above his planned 20 psi is the potential difference of about 8 lb/min or 80 hp (though your boost maybe dropped abit less then 28 psi as the rpms went up, as 16g's seem to usually be able to hold around 25-26 psi max). So given the info on that setup, I would say running lean under those conditions would be expected.

Well, what happened after that was the part that sucks. I blew most of my intercooler connectors and the engine was on its way out anyway. Thats when I opted for a 6 bolt motor.
After that one wot experience I could only boost 13 psi due to the massive leaks I had. But, thats another subject.

The boost at the time I was using the 16g didn't fall off much at all. Maybe 2 psi. It did pull pretty damn hard though. Also, I didn't intend to boost that much. I later found out that my dumb @ss installed the boost controller hoses backwards.

Another note. Before I had dsmlink or the injectors, I was able to boost 16psi with the 190.

 

[1G90AWDTsi]

Sorry to but in, but what does "MBC" mean and what does "50 Trim" mean? Thanks

 

[spyderturbo007]

MBC stands for Manual Boost Controller. The trim size gives you the squared ratio of the inducer diameter divided by the exducer diameter times 100. For the most part, that larger the number, the bigger the turbo.

 

[boostedbrian99]

I got everything friday ( yesturday ) 1 day shipping. didnt have time yet to really sit down and look through everything but Only thing is they sent me a install kit for the fuel pump and in the instructions it says to put the new harness on the fuel pump. But they didnt send me the plug. do I need that plug or can I just get little connectors to plug into the fuel pump on the pos. and neg.?

 

[Eclipse98_RS]

I just got a rebuild with forged pistons, different head gaskets, and better studs,....my Next question is ( this may sound dumb ) but with the apexi neo and a 255 fuel pump I still need a fuel regulator?

You may not need it right away, but in the future the 255 needs a FPR. I just got schooled on another post for saying you dont need it, when in actuality its a really good idea to have it. You have a good start building this car up, have you gotten a new tranny yet? You might wanna go with that as your next upgrade. Tranny/clutch and then go for the neo and the 255/FPR.

 

[boostedbrian99]

I just got done installing the Apexi neo. Pretty simple hook up. Very nice system. Now I have to figure out the air-map system