WillRyan

Been on the forum for a while but just made an account. My dad and I are putting a LQ4 with a PT-8847 turbo in our S15 Jimmy! The motor will be all stock for now, but later down the road we will do heads/cam, fully forged and what not.
I've been looking up Electric Fuel pumps this morning for the past couple hours and have made the decision on a MagnaFuel MP-4301 it says its rated for 1500 hp and street use.

I like the pump, I like the price, but whats yalls opinion on it? Is there anything better?
This is what we will be putting it in!

Blackpanther99

iTrader: (8)

I know a guy in the Houston area that had one of those fuel pumps on his 441LSX build with a PT106 turbo and it held up very nice. Never heard him complain about it.

Sick *** ride btw! Looks tame!

WillRyan

That's what I like to hear!!

And thank you man, can't wait to get it running!

stevieturbo

That 1500hp is probably at low carb pressures. Not turbo/efi.

It will probably barely support half that figure at any sensible working pressure.

samdogmx

iTrader: (14)

I love my holley 1800 dominator pump but it wont support 1500. That is belt drive territory IMO

stevieturbo

For a legit 1500hp and some headroom, 2 big pumps like those would probably do it.

3 x 044's would do it

3 Walbro's might do it...although that would depend who's HP you're using.

Blown06

iTrader: (32)

yea a 4301 might support 1500 hp at 6 psi n/a.......but nowhere near that at 43.5 psi base efi with boost on top of it.

Hell, I don't think a single 4303 would do it.

Don't get me wrong, the 4303 is an awesome pump and fully capable of being street driven. But for a real 1500 hp and reliablilty........I'm seeing a push towards belt drive pumps.

WillRyan

Forgot about this post!! :/

Went ahead and ordered the MP-4301! It's a beautiful piece, and hopefully it will do the job! Thanks for the replies guys!

Blown06

iTrader: (32)

As I said, the 4301 is not gonna support anywhere near 1500 hp on a fuel injected forced induction setup.

stevieturbo

Not a hope in hell of it supporting that power. Unless its a fairytale dyno, or you're buying two pumps

I think its almost false advertising when they make these power claims for pumps.

HexenLord

Twin walbro 450s will do it, as long as you have 160 lb/hr injectors to keep the pressure down.

Blown06

iTrader: (32)

huh?

What does having a 160lb injector have to do with keeping pressures down?

93Z2871805

iTrader: (5)

I believe he means running a 160lb injector on 43.5 psi vs running a 130lb injector at 58 psi to meet the fuel requirements for the power, thus keeping the pressure lower and letting the pump flow a higher gph to support more power.

HexenLord

Right. Pumps flow less at higher pressure. Bigger injectors will still let you get the fuel you need at a lower pressure than small ones.

I-H8-RICE

"¹ Power ratings are for naturally aspirated engines running gasoline. "

But i dont recall seeing that he actually wanted to make 1500+ HP
the way they advertise this is kindof bull crap though, im sure it should be able to hold up safely to 900-1000 with boost & efi youd think which is still pretty damn good.

Edit, i guess the title does say 1500 HP pump lol

WillRyan

I guess the title is misleading.

With the PT8847 on the LQ4 we have high hopes of somewhere near 1000 RWHP.

So say there's a 20% drivetrain loss, I'd only need 1250 hp to get to my goal.

Yes that would be in a perfect world, and I don't wanna jump into a argument.

I will be running this pump with FIC 1000cc 95lb injectors on 93 octane.

Shownomercy

iTrader: (1)

Its gonna be loud, my 625 is louder than my motor at idle for sure.

But so far its held rail pressure at 60psi base and 1:1, just 10psi for now though.

WillRyan

Good to hear! Thank you!

Blown06

iTrader: (32)

Wrong injectors too. But you don't wanna argue so........

WillRyan

What injectors do you recommend and why?