R34 Gtr Fuel Sock Position For A Holley Hydramat

[burn4005]

Hi Guys,

I'm currently planning a fuel system upgrade to my BNR34 and want to keep things looking stock so i'm putting a Walbro 460 in tank. Holley have finally released their Hydromat products in sizes other than the nascar ones, and I need some help on the positioning of the OEM sock in the fuel tank so I know which one to get. I'm away from my car at the moment and can't pull it apart to check, so if anyone can help i'd really appreciate it.

what does the fuel sock positioning in the tank look like, green, red or other, and which of the hydramat products would suit better?

Option 1: 38x20cm cross

Option 2: 38x20cm cross

there are others here: https://www.holley.com/products/fuel_systems/hydramat/

EDIT: i found this image that would suggest Option 1 is the better one:

and here's a video to see what i'm on about if you haven't seen them in action.

Edited March 8, 2015 by burn4005

[GTSBoy]

I'd go with option 1. The beauty of the product is that even if you made the wrong choice it'd probably be just as good.

[burn4005]

hmm, true. also saw the 11" square. that would cover the entire base of the tank, and I could just run a longer fuel hose to it so it sits in the correct centered location, with a metal rod as an extension from the end of the stock bracket holding the central fitting in the right place. that may be a better option.

also, does anyone know if the walbro 460 primes itself OK if it is placed in the stock location? or does it need to be located right at the bottom of the tank?

Edited March 8, 2015 by burn4005

[scotty nm35]

Only the pierburg pumps like to prime like that, not sure how the Walbro will go. A large external will do the job nicely it seems...

I wonder if the magic part is ethanol tolerant?

[The Mafia]

This looks really cool

[burn4005]

Incredibly, I've made zero progress on this.. my car has been at a workshop for months and months having the engine built for track work/quaife front.

I have a bunch of stuff that i need to do once I get it back, but this is still on the list. I'll get some photos of inside my empty tank and work out how to progress with this.

I have a few things to test, namely the flow performance of the oem jet pump at various rail return rates, I have a high flow Sard jet pump that I can swap in if it works better. The pumping over from the other saddle straight onto the hydramat will increase its effectiveness greatly.

If its inadequate I may look into a lift pump actively pumping from the other saddle onto the hydramat.

Edited September 9, 2015 by burn4005

[bigboss59400]

I'm bringing back this thread as I would like some feedback regarding installation and use (on a r34 gtr preferably)

Thanks

[The Mafia]

I'm running a R33 GTR circuit car. It's on Slicks, E85, 800hp. All the good stuff. Sequential Holinger etc. 

I have Frenchies earlier dual pump hanger - It seats two Walbro 460lph pumps on the bottom of the tank next to each other. 

I've run that tank as low as a quarter while racing and have not had any issues with fuel pickup at all. Radium rail and end mount reg. 

Always logging the fuel pressure. 

Hydramat might be good, but you might be overthinking it too mate. 

 

Edited November 16, 2022 by The Mafia

[bigboss59400]

That's really good feedback as I'm not going to push any further than you do.

I will go your way then

[burn4005]

other option is radium do an in-tank surge setup for the R34 tank.

hides it all away and very neat. not a huge surge capacity but you can't use that much fuel around corners anyway.

Edited December 8, 2022 by burn4005