Holley's Hydramat is now shipping - fuel starve solution?

Robert Yuras

https://www.holley.com/products/fuel_systems/hydramat/

I'm thinking that using the 15"x8" cross mat, positioned so that the mat lays over the driveshaft hump and into both sides of the fuel sump, hooked to an additional intank pump which will pump a feed line back to the stock unit and dump fuel into the plastic "pickup can" may be the trick. The whole goal is just to keep that can full of fuel.

If it works it will be huge. I plan on testing this. I'd love any insight you have.

phunk

Let us know how it works after you build it

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AntiVenom

interested in the results... sub'd

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dP3NGU1N

Any updates on this? Very interested in a solution

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Perkuleez

sub'd

bobburk

If this thing works the way they are showing why the second pump? It seems that if you get the longer mat that goes over the hump the fuel starvation problem should be solved.

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Felix 808

I've been researching this for a while myself. I'm looking at possibly "T"ing 2 of the 8X3's together on the outer sides of the tank (they're held by magnets). Jegs has them at a pretty good prices. Anyone know off hand what size the pick up hose used in our cars is?

Thoughts ?

Thanks

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Felix 808

Man I keep looking at the fuel pump pic in the manual (not having pulled it to look at it) but am I missing something? It does not look like you can attach an external pick up to the stock unit. The manual says "Never disassemble fuel filter and fuel pump assembly." which looks to be the only way to connect the Hydromat as you need a way to feed the pump from outside of the bucket.

Any insight phunk, guys???

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AntiVenom

i seem to remember phunk saying something about that exact thing. that it is difficult/impossible to simply tap in to the stock pickup line.

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Felix 808

Yeah I hit up Rusty for some thoughts & he said pretty much the same. Looks like Phunk will be getting some more business before too long.

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dP3NGU1N

What if you replaced the stock pump with an aftermarket unit like an aem or something? Do you need to use the stock pickup then?

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DOOMMONKEY777

Well i can tell u now the only one that will work is the 30x15 or maybe the 24x14 one, in any case, now u need a pump pickup to be different, or different setup completely. Still insanely expensive.



Edit: took a second look, and it seems like they just use the fuel filter and made a pad out to f it, the good thing about fuel filters is they saturate in fuel verry well.

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phunk

Some food for thought on this.

-You are looking at about 30-32" of span to reach from the bottom of the fuel pump to the floor of the drivers side of the tank.

-the factory fuel pump resides in a "module". It is surrounded by the fuel filter, and then a canister that is *supposed* to act as surge protection. Obviously the canister doesnt do its job - probably because the majority of its displacement is spent on the pump, filter, regulator, etc etc... and its pathetically shallow at only 4" deep when the tank is more like 10" deep. At any rate, quite bit of modification woudl be required to make the factory fuel pump module accept a fuel pickup that isnt a compact little unit that attaches directly to the bottom of the pump and never leaves the confines of the canister.

-The fuel pump, and anything you would easily replace it with (AEM, Walbro, Aeromotive, DW) uses a standard in-tank fuel pump inlet attachment style that the Hydramat does not conform to. some sort of adapter fitting would need to be manufactured to attach anything other than a standard in-tank pump pickup to the bottom of the pump.

My predictions are that nobody is going to successfully implement a Hydramat to a 370z without building a custom fuel pump module/hanger that holds the pump higher up and gets rid of all the complexities of the factory fuel pump module. This would also entail running an external filter and regulator (custom return fuel system). Anyone is welcome to take this prediction as a challenge and motivation to prove me wrong! But if anyone wants to try and build a custom fuel pump hanger for their car, I sell and have in stock universal billet fuel tank flanges with electrical bulkhead connectors and threaded bosses just waiting for whatever custom bracketry someone wants to build and bolt up to it.

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Felix 808

Phunk,
Thank you shedding some light on the situation &

Jk

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cv129

Thread revival...

I thought to PM OP, but last time he logged in was Nov 2015.

I was browsing Z1's website and came across this Z1 kit, sounds a lot like what OP said?

Literature from Z1's site:

"The Z1 Motorsports Fuel Anti-Starvation Kit solves this issue by utilizing a secondary fuel pump which transfers fuel from the left-hand sump of the fuel tank directly into the OEM fuel pump basket. Thoroughly track tested at Road Atlanta, this kit eliminates the fuel starvation problem on a clockwise track particularly prone to cause fuel starvation problems on later model Nissan Z models."

Attached Images

Z1FuelStarveKit.jpg (532.6 KB, 94 views)

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