FasTimeSS

iTrader: (47)

i talked to nate he said that 3 walbros are almost exactly even with the 4303. the 4303 WILL do 1400rwhp BOOST

Blown06

iTrader: (32)

It's funny, I only have experience with a friend of mine running the 4303 on a rear mount turbo deal on C16. I think he had 80 something pound injectors. On the dyno, he was making around 800 rwhp when it started dropping fuel pressure. This was with a base of 58 psi and trying to ramp 1:1 at 20 psi boost.

After this, he tried dropping the base to 43 psi, to help the pump out and still had the problem.

This is why I've posted numerous times that the 4303 seems to run out around 800+ rwhp on a boost gas combo. Maybe he had other issues (voltage problems). I thought it was kind of strange that it would only support that much, but figured it to be true since it was happening.

If others are supporting a real 1000+ rwhp with this pump boosted on gas or e85, then it is what it is. I'd like to see some real world testing on a set up that was known 100% to be trouble free.

skinnies

iTrader: (33)

I believe others have fell short of 1000rwhp on e85 with it, that is why I was asking for real world numbers.

NicD

iTrader: (7)

I run the 4303 on my Camaro on E85 and with a base pressure of 40 psi and 18 psi of boost with a referenced regulator I have no pressure drop what so ever making 800 to the tires through a TH400. The car traps ~153 at 3400 lbs for comparison.

MIGHTYMOUSE

iTrader: (59)

which ones of these being compared require voltage controllers and or a larger fuel return line?

are any of them anywhere near as quiet as a walbro?

Blown06

iTrader: (32)

The 4303 requires no voltage regulator and is street friendly.

fuel line size is a function of power produced, not pump size (to an extent)

the walbro is certainly quieter than the 4303.

LS1NOVA

iTrader: (12)

Real world results:

4303, gravity fed by -12, -10 feed, 997rwhp on a Dynojet through an unlocked 4L80E and 9" IRS. That was 21psi, tried higher and went lean. Has FIC 2000's and the tune was good. Pump was done. 45 base and 1 to 1.

Blown06

iTrader: (32)

Excellent post. Thanks for sharing your results.

PRAY HRD

iTrader: (119)

Is that on E85 or something else? That makes a huge difference as well. If it's not on E85 and your results are the true test of this pump, i would be sorely disappointed as it's the 4303 is the pump i opted for. Idk how they think it's quiet operation though! lol

LS1NOVA

iTrader: (12)

E85. 1000rw on E is a crapload of fuel and shows that this pump can deliver the goods for those wanting a street capable electric pump. Id go belt drive over 1000 on E. This is a street car 95% of the time and see extended idling and traffic all the time.

PRAY HRD

iTrader: (119)

ok that sounds better. I forget what magnafuel pump my buddy has but will do 3000hp so should be good for 1300rwhp on E and i'd do that before a belt drive myself but i don't really know much about them. we also drive ours and his is at 900+rw on E85 and will not see a track cuz he doesn't want to turn it into another racecar. Mine see's next to no traffic living out in the country thankfully. I hate stop lights! lol

FasTimeSS

iTrader: (47)

if 3 walbros flow as much as a 4303 then yes you will need the same return size as your feed size.

who care about the noise of the pumps? ur not going to hear it at WOT, race car ****