PUMP IT UP!
Birgitta at Autoshop emailed me the dimensions of the new fuel pump before she
sent it so I could make
a cardboard dummy to start working on the location planning. Turned out later
to be pretty close!
I'm really proud of this
construction made with small rubber vibration absorbers all around the pump.
I found the rubbers at TeknikProdukter
and they're there to keep the pump noise down.
The brackets were welded
directly onto the inside of the trailer hitch bar. With this bracket
I don't need to worry about the pump - it doesn't go anywhere!
The 100 micron Aeromotive
# 12302 fuel filter sits betwen fuel cell and pump and
is real easy to open up and service. This trailer hitch bar really is useful!
After losing pressure at
full throttle from the starting line (dangerous
We eventually had to change to the
pump #11102 because I suffered a
couple of drops in fuel pressure during
testing the #11104!
However, the new pump is for racing
only - no street use - which is no big
problem since I use the stock tank
with a Walbro pump on the street/road.
And usually not the supercharger connected.
indeed, see Santa Pod and Winter
Nationals in 2006) I had to take
apart my fine #11102 Aeromotive EFI fuel pump just to make sure.
And yes, the problem was obvious! Mechanical fatigue. Aeromotive
says "drag racing only" for this pump and they're so right about that!
Two times this pump has been used for longer durations - on tuning
and when Karl Ellwein and I were closing in on Santa Pod when
running the stock street fuel tank dry and "had to" switch to race
fuel cell for the last miles... Boomerang in your neck and you learn!
Too long running - overheating
- steel boys eats through sophisticated
surface on aluminium plate.
Other side was just as bad! Now two
1. Is there a repair kit to
2. Where is all the aluminium, in the regulator or in
(Fuel filter was then installed BEFORE the pump...but
this incident I added a filter AFTER the pump as well, which you
can view at the FUEL_SYSTEMS page)
September 12 - 2011
Worn out! Again!?
six steel rollers (background) which are building pressure and
while rotating in this electrical motor, have worn
out the specially aluminium alloy surface! The 0.011" (0.28 mm)
separation have of course lowered the pressure
due to the passage
of gasoline, besides sending aluminium particles to the filter...
Aeromotive #11102 will go to service (since the manufacturer
refuses to send separate parts due to their liability insurance).
For a couple of reasons it was time to step up to this EFI fuel pump.
Birgitta "The Queen" Bergqvist of Autoshop recommended this one
which is the same that Kent Edin uses in his Gentle Giant SS.
MagnaFuel MP4103 has a kinky color scheme but in their ad
promise that this EFI fuel pump will support 2.500+
However, when you
read the small print it says: "Power ratings are for
aspirated engines running gasoline." Anyway, it's
almost double what Aeromotive promises and lies about ;-)
The most important reason for the change of pumps was that the
Aeromotive was on the edge for what the Jeezus engine needs
to deliver 1100 + horsepower!
Now...we can just hope for quick shippings so that I will get it all
together before Night Of Fire at Tierp Arena...?
Fuel Pump Voltage Booster
in case the fuel pressure drops again at the start...?
If the wear in my Aeromotive fuel pump wasn't the whole explanation, a general
voltage drop under WOT
can be? Then this will come in handy, mounted by VW-Micke and ready to go! A
Voltage Booster for the
fuel pump. It is guided by the engine boost via a Festo-line going from the
intake through the frame.
It's really an easy install but it can be hard to access some areas with cables
and stuff. I'm glad that
VW-Micke did most of this, his hands can go anywhere. Box stands on protective
An idea is to replace the
stock fuel pump with a Walbro pump #GSS340M which performs 67.5 Gallons
Per Minute (255 Litres) and pushes the fuel pressure meter to just below 40
psi. It is very
good for my
street cruises, with or without the ProCharger, but it's just not enough for
power outputs above 700 hp.