new Brosol fuel pump, pump rod, and high pressure

BarryL · Last edited by BarryL on Fri Jun 27, 2008 8:42 am; edited 1 time in total

I decided to put on a new fuel pump so I went and bought the latest Brosol that is being offered along with the corresponding rod with a length of 107.5 mm or 4.31 inches. The top outlet is dumb because it's aimed right at the throttle, but whatever.

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I test ran it for leaks and it started right up. When I got back from a cruise I checked for leaks again and found fuel dripping big time out of the throttle. I pulled the gas cap off and no whooshing and it's a real VW one also. Leaving the cap off I pulled the hose off at the carb and fuel shot out like a hydrant spraying everywhere. There's a lot more to say but the upshot was I bought another one thinking I'd gotten a lemon plus I didn't like the "up" outlet. The new one said to use the 107.5 mm rod so I did and it has the pipes in a more copacetic arrangement.

Same problem: sky high pressure. I changed 3 different new needle/seats, 2 different floats, extra gasket on the needle but to no avail. It still runs down the carb while running and after shutoff. I've measured all the ways the Bentley says to but the short or long rods are all different than the OG VW rod. I've written down all the measurements. I went and bought a new fuel pressure gauge and the pumps are putting out 14 psi while cranking the engine.

I really need some help.

my65vert · Posted: Tue Jun 24, 2008 7:24 pm Post subject:

Going through the exact same thing right now. Same pump as your first pic and one of the old style rebuildable pumps.

I think a holley fuel pressure regulator will be the trick.
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sloans265 · Posted: Tue Jun 24, 2008 7:27 pm Post subject:

I have found that not only are the aftermarket rods sometimes longer than og VW rods. But also the aftermarket fuelpump stands can be "shorter" than the og one which makes the rod push up even farther. I remedied the problem by installing an od rod and stand to get my pressure back down to a "manageable" range before shimming it with gaskets.
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Glenn · Posted: Tue Jun 24, 2008 7:29 pm Post subject:

Try adding a few gaskets under the pump base to lower the fuel pressure. You could also grind down the pushrod a little.

Personally, I hate those pumps. They look like crap.
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BarryL · Posted: Tue Jun 24, 2008 7:41 pm Post subject:

The lever is .3200 up inside the case. The rod sticks up at it's lowest .4218 which means the pump is already engaged upon boltdown. If I put in my middle length one that starts to protrude at .2500 and rises to .3906 the pump only lifts .7000 but has a gap of .7000 before the rod hits. This configuration yields 4 psi; still too high. What is going on? I've researched the rod length vs pump for 4 days and they all say to use the 107.5 mm length.

Glenn · Posted: Tue Jun 24, 2008 7:46 pm Post subject:

The rod should be 108mm according to the VW micro fiche. does the pushrod looks like it was made with a pencil sharpener?

The new aftermarket rods look like crap.
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Culito · Posted: Tue Jun 24, 2008 9:33 pm Post subject:

I put one of those pumps on my engine...I think they have way more pressure than the stock pump out of the box.
I had to put a thick-ass gasket underneath mine, otherwise it would shoot fuel out of the top of the carb and flood the engine immediately.
That and the outlet points directly into the carb base flange of the manifold, and the fuel line rubs there.

Yeah, they blow (too much).
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bill may · Posted: Wed Jun 25, 2008 7:02 am Post subject:

need an original german fuel pump that you can get a wolfsburg west rebuild kit for Barry? i have some (pierberg from 67 beetles)
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mynameismud · Posted: Wed Jun 25, 2008 7:12 am Post subject:

pyrOman · Posted: Wed Jun 25, 2008 7:16 am Post subject:

bill may · Posted: Wed Jun 25, 2008 8:00 am Post subject:

BarryL · Posted: Thu Jun 26, 2008 8:40 am Post subject:

BarryL · Posted: Thu Jun 26, 2008 7:23 pm Post subject:

Ok my local auto parts house had this. It is all new and not rebuilt and looks very husky in the casting, pin, and other materials.

It did not come with a rod however. This pump is recessed .3000" and my German original was .3100" but it could have been worn down. The 108 mm rod rises from .4375" up to .5781" : obviously way too high. Does anyone have the specs for how high the 108mm is supposed to be or is mine normal? How long is the rod that rises from .3100" up to .5100" supposed to be?

hsosa1 · Posted: Thu Jun 26, 2008 7:43 pm Post subject:

that fuel pump looks like the old bocar brasilia pumps. the new bocars are crap. I ended up going with a german fuel pump rebuilt it .
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Culito · Posted: Thu Jun 26, 2008 7:50 pm Post subject:

Glenn · Posted: Thu Jun 26, 2008 7:53 pm Post subject:

Here's another twist... the aftermarket Bakelite base are lower than the original ones. This will also raise your fuel pressure.
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type241 · Posted: Fri Jun 27, 2008 5:57 am Post subject:

Fuel pump creates oil pressure?

pyrOman · Posted: Fri Jun 27, 2008 6:07 am Post subject:

Glenn · Posted: Fri Jun 27, 2008 6:11 am Post subject:

pyrOman · Posted: Fri Jun 27, 2008 6:15 am Post subject:

'So'right! Cool

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new Brosol fuel pump, pump rod, and high pressure
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