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Walbro 450 lph e85 fuel pump diy evo 8/9

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Old Aug 30, 2017, 11:47 PM
  #286  
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Originally Posted by 2winscroll View Post

All those numbers fredthemeathead is throwing out there are totally useless. Why do you care what a pump flows at zero pressure? Unless I see pictures of the test equipment I'm calling total BS.

Lol a 255 pump delivers 400 liters an hour @ 80psi, NFW! You could put 40 volts on that beatch and it wouldn't do tha kinda flow @ 80psi.

This guy is needs to be banned for blatant lies!


It's pretty obvious you're the one coming out with all the bull****, no idea about electronics or constant current power supplies or flow or pressure or tuning or pretty much anything else.



Zero pressure........that's an easy baseline test which is done first. Gives a direct comparison to the official Wally 450 specs here.

http://walbrofuelpumps.com/walbro-f9...-fuel-pump-e85

A pump always flows less volume with an FPR hooked up to it, more volume at zero pressure.
That's also it's minimum current draw which is handy if you want to make a power supply to control it.
A walbro 450 l/h pump at 80 PSI, 381 l/h, 13.5V, 18.6A = 250W
A walbro 255 l/h pump at 80PSI, 400 l/h, 22V , 14A = 310W.

There's always a close correlation between power consumption and fuel movement.
The difference is due to efficiency.



You've never done any pump or injector testing?
You can't do injector testing unless you've done pump and FPR testing first.

Got to have stable pressure and known pump flow.

Then you can move on to things like this


Then bigger and better things.

.

Last edited by RightSaid fred; Aug 31, 2017 at 01:02 AM.
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Old Aug 31, 2017, 04:29 AM
  #287  
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I know nothing about electronics ehh???

I'm an electrical engineer and wisconsin state certified master electrician. I work in one of the most technologically advanced paper mills in the world. My big toe has more knowledge about electrical controls than you will ever have period. I maintain two steam turbines and one hydro electric dam site also five different boilers and two paper machines. Our facilitiy probably uses more electricity than your entire country of New Zealand.

I'm not impressed with your homemade "fire hazard" flow bench, looks like some high school class project gone wrong.

So your telling me a wally 255 will flow 400lph @ 80psi 22v?
That's more than a double pumper (twin 255's) @ 13.5v each.
So adding 8 volts gets you well over double pump output? Wow magical efficiency!





As you can see a Wally 255hp flows under 200lph @80psi, so achieving over double the output with 8 volts is not believable for me.

As for injector testing it's not needed for tuning. All my injectors come as matched sets. As long as you hold your fuel pressure linear with boost/vacuum reference your good. Some guys are running pumps that flow twice as much as they need, not a big deal it just goes back to the tank in the return line.

How do you not understand that a constant current source is much better than straight up resistor?
Im not talking about a voltage booster just a replacement for a resistive circuit.
Oh yea a chunk of wire is the best way.....my azzz.
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Old Aug 31, 2017, 05:03 AM
  #288  
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Steam gen #1



Steam gen #2



High voltage switchgear only electricians can enter this room.





one of the many hydro generation wheels at the dam



Vessel heater electrical project I just completed

There's my resume on electrical but I'm sure yours is far better.

I work on vehicles for fun and it employs my son.
I'm an electrical engineer as my main employment, so your WAY OFF telling me "I know nothing about electronics"

Last edited by 2winscroll; Aug 31, 2017 at 05:23 AM.
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Old Aug 31, 2017, 09:18 AM
  #289  
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Originally Posted by 2winscroll View Post

So your telling me a wally 255 will flow 400lph @ 80psi 22v?
That's more than a double pumper (twin 255's) @ 13.5v each.
So adding 8 volts gets you well over double pump output? Wow magical efficiency!



As you can see a Wally 255hp flows under 200lph @80psi, so achieving over double the output with 8 volts is not believable for me.

You forgot about the law of physics that says you can create something from nothing....oh wait...
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Old Aug 31, 2017, 11:39 AM
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Gents

This has been a good debate, and clearly the discussion is touching on the higher levels of automotive electrical properties

If you guys could argue the points w/out the insults, it would make for a much better thread discussion.

Thread closed but my reopen later on
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Old Jul 11, 2018, 09:38 AM
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few days back did this exact installation according instructions from OP.
It worked like a charm. Spot on!
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