Henko Racing fuel pumps

[RA Dunk]

anybody got one of these are they any better or worse than a walbro??

[RA Dunk]

anyone??

[the squiggle]

Never heard of them but that does not mean they are poor

I would stick with what the masses regard as a reliable uprated pump such as FSE, Bosch or Walbro

Grant

[RA Dunk]

ok cheers squirrel m8..was just needing some info on em before i paid

for it but too late now lol..comes with a 12 month guarentee though so

hopefully its a decent enough bit of equiptment

[RA Dunk]

for anybody that may be intrested (or understand more then me lol)

For Info

Henko Racing/Walbro Fuel Pump and general fuel system information

We

are commonly asked "what is the difference between the Henko

Racing/Walbro pumps? I thought they only had a 190lph and a 255lph

pump...?" Well, there are actually quite a few different pumps that

they offer. First, we have the 190lph, the 190lph-HP, the 255lph, and

the 255lph-HP. Then we have the "flipped" versions of the 190lph, the

255lph, and the 255lph-HP (no 190lph-HP). SEE PIC BELOW.

These pumps have the inlet rotated 180 degrees from the inlet. The

reason is to allow for a greater number of fitments. With these 7

pumps, Henko Racing/Walbro can fit numerous vehicle applications. Other

than that, each "series" of pumps is the same in terms of fuel flow

characteristics.

Fuel Pump Matrix

190lph

190lph-HP

255lph

255lph-HP

GSS250

F20000141

GSS317

GSS342

GSS278 (flipped)

N/A

GSS315 (flipped)

GSS341 (flipped)

Another

question we are asked is "what pump do I need and what is that HP

about?" That questions is simple but technical at the same time.....to

be continued

Regarding

the HP question, that is fairly simple. If we take the two 255lph pumps

and look at the pressure curves we see that they are very similar until

about 60psi. After that point, the standard 255 pump starts to die off

whereas the HP keeps going.

To

use an example to illustrate pump choice, we will look at a

turbocharged Acura application. On these vehicles, the OEM fuel

pressure regulator is referred to as a 1:1 regulator. What this means

is that for every pound of manifold pressure (boost) there will be a

corresponding 1 pound increase in fuel pressure. If the base fuel

pressure is set at 40lbs and we introduce 10lbs. of boost, the total

fuel system pressure at boost will be 50lbs. That sounds good and will

work fine with a standard 255 pump but there is one small problem.

The

problem is that we still need more fuel than the 1:1 regulator can

effectively deliver. One way would be to add a larger set of fuel

injectors and use an aftermarket engine management system to control

them. The other, more commonly used method of fuel enrichment is the

rising rate fuel pressure regulator or FMU. This device functions in a

4:1 (or more) ratio and will increase the fuel pressure 4 pounds for

every 1 pound of boost. If we once again set our base fuel pressure at

40 lbs. and add 10 lbs. of boost we will now see 40 additional pounds

of pressure for a total of 80lbs. of fuel rail pressure. This goes

beyond the capabilities of the standard 255 pump and mandates the use

of the 255HP pump. From this we can see that given two different

engines, both with a hypothetical 400hp, the one with the larger

pressure requirements will need the HP pump, the one with the smaller

requirements will not.