Fuel pump options
#1
Guest
Posts: n/a
Total Cats: 0
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Inline?
In-tank?
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
- 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
Reply
0
#10
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
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.
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.
#11
Guest
Posts: n/a
Total Cats: 0
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Originally Posted by bripab007
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.
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?
Reply
0
#14
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
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
Source: http://www.autoperformanceengineering.com
#15
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Originally Posted by ruger988
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?
#16
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Originally Posted by braineack
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.
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.
#19
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
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
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
Last edited by magnamx-5; 07-29-2006 at 05:15 AM.