STAR

iTrader: (1)

Hey guys, how much power can the MP-4303 support on its own? Here's the scenario:

80 lbs injectors
billet fuel rails
return system
boost referenced regulator
-6 an feed and return

Can this support 900rwhp in a boosted application?

dan03mach

iTrader: (1)

I seen one suppor over 1100rwhp and still have plenty of fuel to go. I'm about to buy the same pump and magnafuel told me it will support about 1300hp in a FI application.

Nasty N8

iTrader: (33)

The pump can without a sweat. You need to use -10 feed and -8 return with it to keep temps down. There 4301 will support 900rwhp. Give me a call I can help you setup the system for your application.

Nate

RAACCR

The -8 inlet size on that pump has always freaked me out, especially when Magnafuel claims 2000+ hp. Certainly, you'd want a -10, if not -12, feed up to the inlet, and then step it down to -8 at the fitting. Anybody have a flow chart on the 4303 at different pressures / voltages?

Nasty N8

iTrader: (33)

Our kits feed the pump with -12 for the volume so the pump does not such the line dry. Then feed out with -10 as to not heat up the fuel for street use. That pump can pump alot of volume out its little -8 fittings.

Nate

STAR

iTrader: (1)

This pump will run off a hobbs switch and only come on under boost. I already have everything plumbed and working as descibed in my first post. I'm currently using a bosch pump and its not keeping up, hence the reason to switch over to the magnafuel. Will it be a problem staying with the -6 line I already have?

C5Fire

I would also love to see a flow chart on any Magnafuel pump. Never could figure out why a fuel system company would never publish flow charts to better help their customer make a "informed" decision. The only information they give you is the numbers are based off of a N/A. Ok, what BSFC are they using for those #'s?

Nasty N8

iTrader: (33)

How are you feeding the pump? What are you using for a primary pump? They are both using the -6 feed line? I would up you line just because of the sheer volume this pump can provide.

Nate

Nasty N8

iTrader: (33)

I have posted flow #'s at specific pressures several times. Besides the many systems we have out there running making big power with these pumps.

C5Fire

I didn't say why doesn't nasty N8 publish flow numbers, I said MagnaFuel. Not everyone looking to buy a Magnafuel finds your flow charts. Go to Magnafuels website www.magnafuel.com and tell me how much power a 4303 will support at 75psi @ 13.5 volts for a FI vehicle.

Don't bother looking because it's not there.

If you do have flow charts for the 4301, 4302 and 4303 it should be made a sticky so the information can be shared.

STAR

iTrader: (1)

The fuel system is a modified ECS kit for C5 vettes. Stock in tank pump and stock feed for normal operation and cruising. The external pump has its own -6 line to the passenger rail.

Nasty N8

iTrader: (33)

You will need a much bigger feed line from the tank than the ECS kit has in it. Feeding one rail with a completely different pump is absolutely not a good idea you never know the pressure differential you could get with separate pumps???? That make no sense to me. Give me a call I will help you figure out you issues and I may have some better options for you.

Nate

RAACCR

Nate,
I searched your 4303 flow #'s from some of your other posts. Hope you don't mind me copying/pasting your findings here so others who have inquired in this thread can find them easily.

Thanks


From Nasty N8...

MP-4303 flows 2.7GPM. I have done systems with 2 4301-3 for high Hp motors second one kicking on under boost.

Nate


and...

They provide it.The 4303 at
60psi flows 2.3 gallons per min.
65psi flows 2.2 gpm
70psi 2.1 gpm
75psi 2.0 gpm

The MagnaFuel has been a great product with zero issues so far. The 4303 is a great street pump and should get you to 1500 hp.

Nate

C5Fire

RAACCR thanks for the info! That helped me out a lot!

Here is a quick comparison between the Magnafuel 4303 and Aeromotive's 11104:

4303
60psi 2.3gpm
65psi 2.2 gpm
70psi 2.1 gpm
75psi 2.0 gpm

11104
60psi 3.0gpm
65psi 2.9gpm
70psi 2.8gpm
75psi 2.7gpm

This thread has become very helpful and brought out some useful information. One thing to also take into consideration is cost. These prices are from Summitracing.com

Magnafuels 4303
$529.99

Aeromotive's 11104
$439.95

Jim Craig

What are the amp draws at those pressures? Doesn't that also need to be taken into consideration?

C5Fire

I don't know current draw on the magnafuel stuff but the Aeromotive unit I do have current draw on.

All this was at 13.5V (11104)

60psi - 17Amps
65psi - 17.8Amps
70psi - 18.6Amps
75psi - 19.6Amps

RAACCR

Amen Jim! Apparently, Magnaflow does not publish their flow information to the consumer public. I wish all the fuel pump companies would publish flow at pressures and various voltages like Weldon does, to help their customers and dealers make informed decisions about selecting the correct components for their needs. If it weren't for a few dealers like Nate, who try to help out where they can, Magnaflow's customers would be totally in the dark. I would never put myself in a position to simply order such a critical fuel system component off the net, or through a catalog, blindly hoping the manufacture's vague claim that "this pump can make XXX horsepower" works out okay for the motor in which I've invested so much of my valuable time and money. BTW...I'm the guy with the 16 year old Weldon (that still works perfectly fine, but is a little too small for my new combo) who you provided some information to last week...thanks, I'll be buying another bigger Weldon to get me by for the next 16+ years

C5Fire

RAACCR is right, Weldon does an excellent job informing their customers of what their product does!

98Z28CobraKiller

iTrader: (17)

I'm curious as to whether or not we are talking apples to apples here (same voltage, advertised vs actual,etc). Seems like a huge disparity between numbers from pump to pump that are rated at the same horsepower.

Casey2323

iTrader: (14)

I have talked to magnafuel 2-3 times in the last few weeks.. I now installed the "race pump" on my truck that they told me flows a 1.2 gallons a min more at 60psi.... They are also all rated at 13.7V... but under WOT I can see only high 12V .. I had my injectors maxed and swaping pumps i was able to net 30more hp.. Another truck guy runs the Aeromotive with 96s and is able to make 85psi.... Magnafuel guys direct are REALLY cool and helpfull... but didnt seem happy about setting a base pressure of 60psi.. then stack 20psi on top of the reg.. They ask me "WHY so much"