Fuel pump options
 

Inline?

• BOSCH
• Holley
• Edlebrock
• Walbro

In-tank?

• Edlebrock
• Jackson Racing
• Walbro
  • 190
  • 190HP
    • Will the 94 - 97 kit sold HERE Work for me or not?
  • 255
  • 255HP

SO MANY CHOICES WHAT WOULD BE MY BEST BET?

1990 Greddy Base kit with ETD crossover/turbosmart VTA BOV (6psi for now......not planning on going above 10 - 12)

THANKS

the 94-97 should work i would get the 190 high pressure for 5$ more though. the 255 is to much for your stock regulator and inlines are abit more of a pain than dropping a new one in the tank very simple. the price isn't to bad either.

stock regulator? Don't you have a vortech FPR that comes with the kit?

Does anyone know off hand what LPH the Jackson racing pump is???

yep

nope

humm well i would say invest in a BEGi AFPR and a walbro 255lph pump if your goal is 12psi.

Unless you have BEGi's multi-role 2035 AFPR, then you still have your stock FPR to control fuel pressure in vacuum (-14.7 to 0 PSI); the Vortech only adds pressure in boost.

The 255lph pump often overpowers the stock FPR which causes the car to run rich in vacuum.

255 walbro is the way togo. I also work for cartech & can get you guys those AFPR if needed.

I remember hearing somewhere that you had to midify the pump bracket and all on the 90 - 93 to get the 255 to work....is this true?

Again:

The 255lph pump overpowers the stock FPR which causes the car to run rich in vacuum. The 190 HP provides just as much fuel and your baseline pressure is optimal.

Let's do a little math:

190lph flows 190,000cc an hour = 3,166cc per minute

3,166cc per minute divided across 4 injectors is 791cc

Subtract a bit since the 190lph is probably its rating when "dead-headed," meaning it's flow has turned to a trickle at that rate.

So, the pump should be able to supply four, ~700cc injectors with enough flow to maintain 40-50psi in the fuel rail. That's enough for over 400hp at the crank.

So, tell me why anyone here needs a 255lph pump.

After that post i think my decision is made....a walbro 190......now the only question HP or not?

Hp

I like the pierburg on my car, but if I was to go Walbro I'd definitely do the hp.

DO IT!!!!! :)

Yeah, don't even mess with the 190lph unless you get the high pressure model. The 190lph HP sucker is good up to 130psi according to their tech data. It even flows better than the 255lph HP pump after 100psi. The 190lph HP puts out 28gal/hr at 110psi while the 255lph puts out 20 gal/hr. At 120psi the 190lph HP puts out 22 gal/hr versus 11 gal/hr for the 255HP. At 130psi (Yehaaaah!!!!) the 190HP still puts out 18gal/hr while the 255HP has dead headed!

Source: http://www.autoperformanceengineering.com

Yeah....the 90-93 has a funnel opening that the pump outlet sits in. Its really useless actually. The 94 has no funnel. Just cut the funnel off and use the piece of hose that the walbro comes with and 2 hose clamps to connect the pump outlet with your newly cut fuel pickup pipe.

i havent installed any of my parts yet but i have a 255hp pump waiting to go in, it should be fine with my jackson racing afpr right?

Again, Does anyone know off hand what lph the JR pump is?

Walbro's can be had cheap at anywhere else besides Miata-specific dealers from what I've seen. I've seen Subaru/Evo dealers selling the 255lph for $75 shipped with the adapter. I'm sure they can get teh 190's if you ask nicely.

the Jr pump was the 190 hp i believe but i think moss changed to the 255 inline like the pieburg setup a little later. the 190 lph is plenty as brian clearly pointed out and the hp from wich he takes his data from is the only way to go. btw at a bsfc of .6 then you will need a minumum of 20.63 lph(or 5.4 gph or 32.47lbs/h) of fuel flow. you have ot take that into pump configuration ot figure for your own desired hp and pressure gaols the just use this formula
HP=bsfc×lbs/h
Reuger 998 posted a site with a 190lph hp for 80 bucks in his initial post clik on the word here to see it

I have the opportunity to buy a used(for two months) Jackson Racing AFPR......would this supplement my fuel pump enough to run the stock 6 pounds a little safer for a while or would this just be a waste of money for me ($60 shipped)

It's supossed to supply enough fuel for 8psi with thier fuel pump. Should be good for 6psi. You'd probably want to put a fuel gauge on the line and see what it is capable of. Unless you can find out the ratio. But for some reason Supercharger guys seem to know little to nothing about fueling.

:rofl:

bonus points for being the first guy to use bullets on the forum :bowdown:

I've gotten used to reading posts like this:

Inline? BOSCH Holley Edlebrock Walbro In-tank? Edlebrock Jackson Racing Walbro 190 190HP Will the 94 - 97 kit sold HERE Work for me or not? 255 255HP SO MANY CHOICES WHAT WOULD BE MY BEST BET? 1990 Greddy Base kit with ETD crossover/turbosmart VTA BOV (6psi for now......not planning on going above 10 - 12) THANKS

The jrsc fpr is a 12-1 just like the one supplied with your greddy kit. why would you want what you already have.

why thank you, lol......but am i really the FIRST?

even if you have the 190 or 255 walbro pump, does that mean it pumps at a constant level? or can you control it by using a management system?

simon

the pumps go at a designated rate in regard to there mechanical efficinecys look at the charts and this site to see how and why.
http://www.autoperformanceengineerin...l/fpspecs.html

here are some pics that might help
 

:bigtu:

here is part II
 

I hope this helps, let me know if u need additional info!

Believe so.

nice bracelet bro :greddy:

:gay:

hahah:gay: :gay:

thanks! it belongs to the car. she wears it on the shifter. i like to wear it when i m working on her!

hmm... i think im headed in the walbro 255 as well. looking to buy it really soon

simon

Please do some reading and searching on this board and Miataforum.com on why a 255lph pump is incredibly overkill and has the chance of overpowering your stock FPR, making you run overly rich when out of boost. 190lph HP is the pump you want.

He must hang out with the supercharger crowd, who fuel miatas based on hearing knock or not.

Yeah dude, why even bother reading this post if you end up with a 255 anyways?

yeah I know wtf.

hey, whatever helps you sleep at night :gay:

Maybe he needs visual aids:


http://www.autoperformanceengineerin...s/hp190lph.jpg








http://www.autoperformanceengineerin...s/hp255lph.jpg




Look at the graphs carefully. You'll note that the 190lph actually has a better fuel flow at high pressures. Also note that at lower pressures the 255lph delivers a lot more fuel and thusly the overpowering effect.

My donor car has an Mitsu Evo fuel pump. its what Im going to end up using.
http://www.dsmsource.com/forums/show....php?p=1142761

read all about it. pretty sweet.