Did the sender float get snagged on anything once you got it shoved in there? Could it have pulled the connector loose, or did you forget to connect it? IIRC, it was a PITA to get the wire connected to the lid before getting everything lined up.

I doubt it's broke, its pretty robust.

I got my PTFE hose from Kozmic, since they are close buy. Any performance shop should have it in stock. Usually comes in fuel pump install kits.

 

So it's been forever. Been traveling a lot for work. How is your setup holding up?? Did you get to do a trackday in the dry?

I got mine working, the fuel level float was stuck on a line. Ended up getting the flexy PTFE stuff to replace all the submersible rubber lines i had since those rubber lines could kink easily. Trying to go through my tuning and everything looks great but i've got a lean spot at 4k rpm. Can't figure out what''s causing it. Do they make any fuel pressure sensors that can tap into the ecu so that i can log with evoscan?

Also, aside from the FPR being slightly off on install, did you notice any lean spots? I don't have an FPR, so i'm not sure if having one would make a difference. My tuner is reccomending a walbro 450 in hopes to overcome any physical limitations or restrictions being present.

 

Sub'd for later. I've been thinking about using a mat, for some time now. Good info here.

 

I'm going to remove the hydramat and put the stock fuel system back in to see if the hydramat is causing my lean spot at 4k rpm

 

Did you go back to stock fuel system, was the hydramat the issue? any chance you can take some photo's of your hydramat setup to see how to best fit one of these?

 

I thought the hydramats were a problem because Holly would not report flow rates, and they would close under high flow events. They are good for vehicles with low flow requirements and crazy fuel tank angles (ie: rock crawlers).
So I am interested in how this all turned out.

 

Went back to the stock fuel pump filter. I still have a lean spot at 4k rpm and my tuner and I have no idea where its coming from, but according to him, its not as bad. My tuner is enriching the area around 4k rpm to compensate. Once we get the fueling sorted out around 4k then i'm going to hook up the hydramat again and see if theres any change.

The hydramat flow issues i've seen in the past have been on 700 whp evo's...... and it is suspected the flow is due to the 3/8 fitting that the mat has, For high flow applications, 1/2 fitting or 5/8 is really needed. No one has been able to confirm the mat itself is the issue. So far we're only using 93 octane on a stock turbo, so i didn't suspect to run into any flow issues. At high RPM's, AFR's are on point. Its just this odd spot at 4k rpm. My fuel system is 100% stock other than ID1k injectors, the hydramat, and the radium siphon kit.

 

I've been reading this thread because I had a problem at NCCAR (counter-clockwise) after the long left-hand sweeper onto the front straight. I'm running my Evo X with the stock boost map, so it probably fits the low flow the Hydramat is made for.

My big hangup is that my mechanic thinks installing it over the hump in the fuel tank will be an amazing hassle, and the "NASCAR" curve could still cause me a problem later.
Related to installation: Are our gas tanks made out of metal, or plastic?

 

Tell me more about your setup. E85?

 

No, it's gasoline. Stock turbo, stock intake & intercooler, downpipe with semi-divorced wastegate, stock catalyst, ECU is tuned with stock boost map. It's tuned for autocross in the STU class.
303hp at the wheels (on a Dynojet). It's a daily driver and I'd like it to last, so I don't plan to turn up the boost, ever.

I went to NCCAR on Hancook RS4 street tires, and the car must have weighed over 4000lbs with me and the instructor in it, so I wasn't getting particularly high grip.

 

USDM evo X has particular problem as its tank doesnt have bowl around the pump as the evo X RS and earlier evos do... even with the bowl the e9 will suffer fuel surge in long left handers with less than 1/2 tank of fuel..

yeah, metal

 

Been years, just posting to say that this hydramat setup works. Running down to 1/4 tank on track with no issues. Scared to run the car till it sputters cause i'm trying not to blow another engine.



Ended up having to use the radium fuel damper cause somethings weird with my oem fuel setup, but that cleared up my random 4k fueling issue. Other than that, just running the siphon kit and 1 mat on the drivers side and zero problems with fueling.

 

Reporting in again, run the tank down to 1/8 on accident on track and the thing still won't sputter. I usually try to keep it 1/2 a tank or above just in case.

My 4k lean spot was an issue of fuel system harmonics, the radium fuel damper solved that quickly, i installed it on the stock rail right at the output. Had to modify the fitting at the end of the rail slightly but it has stayed put.

I've got the radium siphon kit dumping return fuel directly on top of the mat, right next to the fuel pickup fitting to make sure i can run lower fuel levels.

With everything terravista has shared, i honestly see no reason to use a surge tank at this point. Happy driving, my friends

/thread

 

Holley Hydramat now has options for direct fitment to Walbro pumps with 11mm inlets.
I'll be trying this on my Evo 6, i'm getting fuel surge with only 15 litres used.

https://www.holley.com/products/fuel...s/parts/16-124

 

Curious to hear your results. One of my business partners has a Focus ST track car and those commonly fuel starve on track, the stock tank has almost nothing for baffling. He is trying a Hydramat before doing a surge tank. From what I've seen they work very well and are used in a lot of professional racecars so they're definitely an improvement in some capacity.