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Discussion Starter · #1 ·
Building a big motor, installing a Fore! triple pump system (which has no bucket) and have read many tales of fuel starvation which means having to keep the tank full all the time.
I have NO desire to endanger this new build by SURPRISE! running lean at the track or elsewhere.
I've read that the Hydramats cure the starvation issue.
What has been your experience with them? Which part number did you use; same on all three pumps?
Did it truly eliminate the issue?
 

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I haven't used myself but I know others who have used them and had great things to say. I still would prefer a proper surge tank or bucket for a big build but hydramat seems like a good cheaper option.
 

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Discussion Starter · #3 ·
I haven't used myself but I know others who have used them and had great things to say. I still would prefer a proper surge tank or bucket for a big build but hydramat seems like a good cheaper option.
I would prefer a bucket (and I'm giving it a LOT of thought) and I'm not at all wild about a surge tank as there's no extra room for it except for the front bumper area(!)
In lieu of a bucket, it sounds like the Hydramat is possibly a FIX for the issue but I need more info, specifically related to the CTS-V tank. The rear portion of the tank ramps up so severely that I would like to know if I need to use THREE of the 15" units or if the 8" will suffice? Five or six HUNDRED bux more on the project is insane, but the peril is significant. Will the smaller hydramats work or will I need the large, or can ONE large one and two smaller...work?
 

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Check with Adam or Jesse. Not sure if they are using one or not.

Couple of thread I found with a quick search.

Start at post 11:
Post #2402

Looks like imthatguy09 did one:
 

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Yup, I have just one in the tank running longitudinally (front to back). Those things are amazing and also double as a fuel filter. Adam112 rigged up a nice setup to use a magnet to keep it in place to feed the auxiliary pump from inside the tank with a custom fuel hat. I have DW300 in tank pumps that run their own filter in the OEM bucket.

I'm 850 rwhp and up, big motor, 2650 blower and upgraded fuel lines.. . no starvation even when down to the 1/16th tank line. I'm not pressing my luck... but I did it once just to see.

I've been thoroughly impressed, but Adam Little is the subject matter expert.

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I edited my post.

Sent from my SM-G991U1 using Tapatalk
 

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Discussion Starter · #9 ·
Interesting approach using the holley matt on the aux along with the 300s in ggg bucket.

With the fore! setup of course, no bucket. I am assuming that using ONE hydramat would not work well as the other two pumps could still suck air.
So… I think I have to buy three of the silly things.
UnLESS…. I can devise a bucket replacement.
 

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Question for @adam112 ,with the three big pumps in there, Which Hydromats would you recommend? Can the 3x8s do the job safely, or is it necessary to use the 15?s
At Mathew Owens recommendation from Dedicated Motorsport, I have the following setup for my Fore System:
Part 16-125 | 3 x 8 HydraMat Rectangular Offset | Quantity (3)
Part 16-203 | HydraMat Install Magnet Kit | Quantity (3)

I have yet to personally test these hydramats out yet, but I will soon as my car is currently getting tuned on the dyno. I still plan to take it easy once my gas level falls a little below a half a tank of gas even with these hydramats. There may be times when I have to run my tank down to 1/4 tank of gas, so these hydramats are just for insurance purposes.
 

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Discussion Starter · #12 ·
At Mathew Owens recommendation from Dedicated Motorsport, I have the following setup for my Fore System:
Part 16-125 | 3 x 8 HydraMat Rectangular Offset | Quantity (3)
Part 16-203 | HydraMat Install Magnet Kit | Quantity (3)

I have yet to personally test these hydramats out yet, but I will soon as my car is currently getting tuned on the dyno. I still plan to take it easy once my gas level falls a little below a half a tank of gas even with these hydramats. There may be times when I have to run my tank down to 1/4 tank of gas, so these hydramats are just for insurance purposes.
I am planning to have Matt Owen tune this build.
That’s good info, I appreciate it.
I’m wondering if using a 15” mat would offer any value or if the 8s take care of it.
I am not giving up on devising a bucket, either. Just what I need… another completely custom component design and fab. Sigh…..
If I can provide the bucket then I shouldn’t need the Hmats…. so there’s some real incentive.
 

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I am planning to have Matt Owen tune this build.
That’s good info, I appreciate it.
I’m wondering if using a 15” mat would offer any value or if the 8s take care of it.
I am not giving up on devising a bucket, either. Just what I need… another completely custom component design and fab. Sigh…..
If I can provide the bucket then I shouldn’t need the Hmats…. so there’s some real incentive.
Ask Matt what he recommends since he is doing the tuning. I am no expert on hydramats and wished the Fore System did not have this design deficiency or limitation.
 

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I am planning to have Matt Owen tune this build.
That’s good info, I appreciate it.
I’m wondering if using a 15” mat would offer any value or if the 8s take care of it.
I am not giving up on devising a bucket, either. Just what I need… another completely custom component design and fab. Sigh…..
If I can provide the bucket then I shouldn’t need the Hmats…. so there’s some real incentive.
So the bucket helps keep fuel near the pickups, basically reducing the amount of "slosh" if you will under velocity changes. The buckets are necessary for traditional fuel pickups, as they have to be submerged at all times. The FORE system is limited in part due to the design (no bucket to keep fuel around the pumps), and due to the heat of the triple pump systems (which fuel dissipates). I suspect FORE chose to go without a bucket almost specifically to force users to maintain higher fuel levels for heat dissipation. IMHO, that's the only consideration, but I'd still rather have Hydramat for low fuel scenarios - because fuel pumps are cheaper than engines!

The Holy Hydramat is amazing shit, and really doesn't need a bucket of any kind in our tanks (due to the narrow surface areas of the two-hump design). Basically, all you need is to design a pickup to your pump(s) either through multiple small mats or one larger mat with dual feeds (which they make). Perhaps squeezing one in under the pumps themselves, but it would be tight for sure. I would suggest the latter, and they sell magnets that bolt on to the eyelets in the hydramat where you can then use another magnet on the outside of the tank to keep everything in place. If you let it hang loose, it will float around and get caught under your fuel sender. :D

Hand Gesture Finger Wrist Thumb


It's seriously cool stuff, and only needs to be even partially submerged to continue pulling fuel.

Gesture Plumbing fixture Vehicle door Window Automotive exterior


The videos are impresive.
 

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It’s almost like you should have bought a system with a bucket…

The 8 inch hydras would be pretty damn short.

My buddy Rob Collins running my triple pump replaced a Fore setup with hydramats (15”) because he was still starving it at the strip. YMMV.
 

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It’s almost like you should have bought a system with a bucket…

The 8 inch hydras would be pretty damn short.

My buddy Rob Collins running my triple pump replaced a Fore setup with hydramats (15”) because he was still starving it at the strip. YMMV.
And to be clear, your setup with the hydramat solved the problem, yes?
 

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Discussion Starter · #17 ·
<snip>I suspect FORE chose to go without a bucket almost specifically to force users to maintain higher fuel levels for heat dissipation. IMHO, that's the only consideration, but I'd still rather have Hydramat for low fuel scenarios - because fuel pumps are cheaper than engines!<snip>
Good points on the heat issue. There is a lot of concern about heat on Fore!s site about it. I'm also looking at a custom (sigh...of course) approach to address fuel heat, as well.

<snip>The Holley Hydramat is amazing shit, and really doesn't need a bucket of any kind in our tanks <snip>
I hope that's true at the track, on every occasion... jury's still out on that... looking for testimonials


<snip>and they sell magnets that bolt on to the eyelets in the hydramat where you can then use another magnet on the outside of the tank to keep everything in place. If you let it hang loose, it will float around and get caught under your fuel sender.<snip>
That's a good point. I hadn't thought about possible sender interference.

It's seriously cool stuff, and only needs to be even partially submerged to continue pulling fuel.
The videos are impressive.
agree
 

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Discussion Starter · #18 ·
It’s almost like you should have bought a system with a bucket…
As perfect as I am, even I can't make every decision perfectly.

My buddy Rob Collins running my triple pump replaced a Fore setup with hydramats (15”) because he was still starving it at the strip. YMMV.
This is interesting. Was he running 15" x three? How low was his fuel level when he would get starvation at launch?

Wonder if he'd sell me his Hydramats?(!)
 

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Surly,

FYI I am running a bigger Aux pump than Dsteck typically provides in his Aux kit. It's an external pump but has a dedicated pickup from the tank via Adam's dual inlet fuel hat. I've done full beans up to 7k RPM with the pump at full tilt on a 1/16 tank of gas with no loss of FP this past summer (I think I posted it in my Build thread). Per Holley, it's an effective 15um pre-filter to boot.

I've been running the same Hydramat since 2019. IMHO, the only reason to not run a hydramat in our cars is because you can't get one to fit.
 

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Discussion Starter · #20 ·
Surly,

FYI I am running a bigger Aux pump than Dsteck typically provides in his Aux kit. It's an external pump but has a dedicated pickup from the tank via Adam's dual inlet fuel hat. I've done full beans up to 7k RPM with the pump at full tilt on a 1/16 tank of gas with no loss of FP this past summer (I think I posted it in my Build thread). Per Holley, it's an effective 15um pre-filter to boot.

I've been running the same Hydramat since 2019. IMHO, the only reason to not run a hydramat in our cars is because you can't get one to fit.
Cool. I'm likely going with them...its just the X3 part that hurts!
 
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