Hey guys, I was wondering what is, and how to determine the limit of the wally 190 fuel pump?

Does injector size play a role in the 190 fp?
Does turbo size?
Amount of boost?
Amount of horsepower?

I am just curious when I will NEED to upgrade to a 255, and how I can tell when.

Thanks guys!

Buy a 255 and be done with it. No reason to buy two fuel pumps and try to sell the 190, as they have little re-sale value. If down the road you decide to run twin in-tank pumps you already have one.

If you plan on anything bigger than a 16g or even pushing the 16g you'll need a 255hp.

Well there is allready a 190 in the car from the p.o.
Im just wondering when I will need a 255 and how I can tell when its needed...

Might as well swap it now before you find out the hard way....

Well, like I said, if your going with anything over a basic mid power 16g setup, you should put a 255 in it.

A rewired 190 at 25PSI it will support 46 lbs/min. More than enough for medium turbos like the 16G and 20G.

A 255 will require an adjustable fuel pressure regulator.

Everything you need to know is here: http://www.dsmtuners.com/forums/tuning-engine-management/244522-injectors-fuel-pumps.html

Artago said:

A rewired 190 at 25PSI it will support 46 lbs/min. More than enough for medium turbos like the 16G and 20G.

A 255 will require an adjustable fuel pressure regulator.

Everything you need to know is here: http://www.dsmtuners.com/forums/tuning-engine-management/244522-injectors-fuel-pumps.html

Click to expand...

So, youre saying that a my rewired 190 should support anything that a bigt28 can flow?

Right now Im just on stock t25 with intake, stock smic with hard piping and bov. Im sure the 190 will be enough for anything the t25 will do, but I plan on going with a bigt28, will the rewire 190 handle anything a t28 can put out?

OR, should I swap pumps when I swap to a turbo larger than a 14b?

94exa2 said:

So, youre saying that a my rewired 190 should support anything that a bigt28 can flow?

Right now Im just on stock t25 with intake, stock smic with hard piping and bov. Im sure the 190 will be enough for anything the t25 will do, but I plan on going with a bigt28, will the rewire 190 handle anything a t28 can put out?

OR, should I swap pumps when I swap to a turbo larger than a 14b?

Click to expand...

190lph pump at stock pressure(43) will be plenty for either big T28 or 14b.

MJcanada said:

190lph pump at stock pressure(43) will be plenty for either big T28 or 14b.

Click to expand...

Yep, much more than that, and I'd be upgrading. the afpr isn't really needed, and you can get away without one. The extra 10psi of overrun won't add the extra fuel.

I run a fp big t28 and a 190 with no problems. I've seen people get 350awhp out of a 190 and hopefully one day I'll be in that ball park

Everyone is sooo quick to say "get a 255". I guess they have money falling out of their pockets. They always forget to mention that you'll also spend $200 for a decent afpr setup.
If it's a 16g level turbo and you plan to stay there for a while, a rewired 190 is fine. Better yet, you can get Evo 8-9 pumps that flow slightly more, 100% direct fitment, and are silent. You can get one from the Evo forums for around $35 all day.
I needed a pump for my auto Talon with a e316g and put up a WTB ad on the Evo forums and had 4 responses the same day. Ended up with one for $30 shipped. No install kit or AFPR needed.

bastarddsm said:

Yep, much more than that, and I'd be upgrading. the afpr isn't really needed, and you can get away without one. The extra 10psi of overrun won't add the extra fuel.

Click to expand...

10 psi over 43 psi will add extra fuel. 50 psi will be adding too much fuel. It will run and boost fine till 4.5k then you will hit a wall. this was a personal experience. without tuning you cannot/should not add that much extra fuel pressure.

Also you don't need to spend 200$ on any afpr to run a 190 or 255. One like, this will work just as good as any with a 255 wally @ 50+psi.

MJcanada said:

10 psi over 43 psi will add extra fuel. 50 psi will be adding too much fuel. It will run and boost fine till 4.5k then you will hit a wall. this was a personal experience. without tuning you cannot/should not add that much extra fuel pressure.

Also you don't need to spend 200$ on any afpr to run a 190 or 255. One like, this will work just as good as any with a 255 wally @ 50+psi.

Click to expand...

Correct me if I'm wrong, but I thought the chop the top off your stock FPR type "adjustable" FPR's only allow you to increase your base fuel pressure.

No that is correct but it easily dealt with. the fps bleeds off the pressure to it just like a stock one.

No fps? To options. 1( make boost controller and T it in with the fpr vacuum line and it well effectively bleed of pressure to your afpr.

2(a[ if you wanna be unique removed stock bcs and mount it where the fps was and extended the plug to plug it in. (b or just run that much vacuum over there and T it in with the fpr line.
That would keep it from seeing anymore more, than stock boost pressure.

Personally I think using a boost controller to bleed off the pressure would be the easiest and best way to adjust your ceiling fuel pressure. And it costs less than 50$.

94exa2 said:

So, youre saying that a my rewired 190 should support anything that a bigt28 can flow?

Right now Im just on stock t25 with intake, stock smic with hard piping and bov. Im sure the 190 will be enough for anything the t25 will do, but I plan on going with a bigt28, will the rewire 190 handle anything a t28 can put out?

OR, should I swap pumps when I swap to a turbo larger than a 14b?

Click to expand...

Does a Big T28 flow more than 46 lbs/min of air at 25 PSI? If it's under 46 lbs/min than a 190 is all you need. I believe a Big T28 is under that for air flow.

There's no point of going to the 255 if you're not going to flow that much air. You have to get an AFPR set up with a 255 which costs more money.

Just install a 190 and rewire it (search this website tech articles for instructions)

Good luck,

Tom

Artago said:

Does a Big T28 flow more than 46 lbs/min of air at 25 PSI? If it's under 46 lbs/min than a 190 is all you need. I believe a Big T28 is under that for air flow.

Click to expand...

big t28 flows around 36 lbs/min

You have to get an AFPR set up with a 255

Click to expand...

Not necessarily

Just install a 190 and rewire it (search this website tech articles for instructions)

Click to expand...

+1 for rewire

So the rewired 190 is enough pump for anything a t28 can flow? How much more do the evo8/9 pumps flow than the 190?

What injectors would you suggest for when I go t28?

94exa2 said:

So the rewired 190 is enough pump for anything a t28 can flow? How much more do the evo8/9 pumps flow than the 190?

What injectors would you suggest for when I go t28?

Click to expand...

I guess you missed the link in this post:
http://www.dsmtuners.com/forums/tuning-engine-management/448038-walbro-190-limits.html#post153101565

Find out how much the t-28 flows, use the link to see what injectors are needed to support that much air flow. The link also has flow rates for common pumps for our car, and rewired.

Injectors are also limited by what tuning solution you are using.

A 190lph rewired fuel pump and some 850cc's


The end.

'97boostinGST said:

A 190lph rewired fuel pump and some 850cc's


The end.

Click to expand...

He has a DSM...it's never the end.

Calan said:

He has a DSM...it's never the end.

Click to expand...

But for that t-28, it will.

So the Evo8/9 fuel pump flows more than a Wally 190, correct?

I guess Ill just look for Evo owners upgrading from their stock fuel pump and stock injectors.

Will the Evo fuel pump and Evo 590cc(I think) be able to supply enough fuel for any amount of boost (read that max was like 21 psi for this t28) the big t28 can flow?

If you plan to run more than 21psi of boost than the Evo 9 pump is the better choice over an Evo 8. The Evo 8 pump will start to bypass (recirculate) fuel around 65psi so with a base feul pressure of 43.5psi + 21psi with the rising rate FPR your at 64.5 already. The Evo 9 does not do this and is around the same price as an Evo 8 pump.
They are both Denso pumps that are a direct fit.
http://www.dsmtuners.com/forums/bolt-tech/335857-lancer-evolution-8-9-10-fuel-pumps.html
http://www.dsmtuners.com/forums/articles-engine-fuel/231405-evo-fuel-pump-install-better-than-walbro-190-2g-awd.html

94exa2 said:

So the Evo8/9 fuel pump flows more than a Wally 190, correct?

I guess Ill just look for Evo owners upgrading from their stock fuel pump and stock injectors.

Will the Evo fuel pump and Evo 590cc(I think) be able to supply enough fuel for any amount of boost (read that max was like 21 psi for this t28) the big t28 can flow?

Click to expand...

I dont get why you keep asking the same questions, unless you want us to spoon feed you all the info and a tell you what to do in the end. If thats what you want, then plenty of the suggestions made will suit you. Get a 255, a arfp, and supporting injectors (which is limited by your tuning solution).

What are you tuning with?

If the t-28 flows at about 35lbs max. So if the fuel pump can support it, you are in the clear.

The numbers are right here, the 190 flows more, rewired and not rewired.

Evos did not come with 590cc injectors, they came with 560cc. Just like in the link we provided the 560cc should flow between:
550cc @ 100% IDC will support 39.48lbs/min
550cc @ 80% IDC will support 31.58lbs/min

580cc @ 100% IDC will support 41.63lbs/min
580cc @ 80% IDC will support 33.31lbs/min

100% duty cycle is never recommended.



Denso US EVO 8 Stock Pump

10psi = 39.96lbs/min
11psi = 39.10lbs/min
12psi = 38.12lbs/min
13psi = 37.31lbs/min
14psi = 36.39lbs/min
15psi = 35.45lbs/min
16psi = 34.48lbs/min
17psi = 33.49lbs/min
18psi = 32.49lbs/min
19psi = 31.47lbs/min
20psi = 31.47lbs/min
21psi = 29.35lbs/min
22psi = 28.26lbs/min
23psi = 27.15lbs/min
24psi = 26.02lbs/min
25psi = 24.87lbs/min

Denso EVO 8 Stock Pump (Rewired)

10psi = 51.23lbs/min
11psi = 50.36lbs/min
12psi = 49.48lbs/min
13psi = 48.60lbs/min
14psi = 47.72lbs/min
15psi = 46.85lbs/min
16psi = 45.97lbs/min
17psi = 45.09lbs/min
18psi = 44.20lbs/min
19psi = 43.32lbs/min
20psi = 43.32lbs/min
21psi = 41.55lbs/min
22psi = 40.67lbs/min
23psi = 39.78lbs/min
24psi = 38.90lbs/min
25psi = 38.01lbs/min

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

Walboro 190lph (Rewired)

10psi = 60.68lbs/min
11psi = 59.85lbs/min
12psi = 59.01lbs/min
13psi = 58.16lbs/min
14psi = 57.29lbs/min
15psi = 56.40lbs/min
16psi = 55.49lbs/min
17psi = 54.57lbs/min
18psi = 53.63lbs/min
19psi = 52.67lbs/min
20psi = 51.70lbs/min
21psi = 50.71lbs/min
22psi = 49.71lbs/min
23psi = 48.68lbs/min
24psi = 47.64lbs/min
25psi = 46.58lbs/min