[Scott65]

I looked at the Aeromotive stealth tank, which comes with a 340lph pump and their rubber wrapped foam enclosure/sump. Looked like it might be an option til I read down to the disclaimer that said it wasn't suitable for drag/road race applications under half a tank... Guess my expectations are unrealistic.

[Tom Vaught]

They assume that the wrapped foam will keep the fuel close to the in-tank pump.
Bad Assumption. There are ways to make the tanks better but you need some fabrication skill and some equipment. Plasma Cutter or Wire EDM being the preferred tools to remove the roof of the tank where the efi pump and tank sender are located.
Then you install your new roof after the fuel trap doors are installed.

The fuel trap doors work the same way as the oil pan trap doors do.

Tom V.

[Scott65]

Yeah, was hoping to avoid all that.(wishful thinking) I can do it, just not sure I'm up for it anymore. My welding skills have diminished with my aging eyesight... I'll probably run with what I have for awhile and give the project some thought. I may conclude that the best overall scenario is the tanks inc tank and proper pump, keeping the level up where recommended. Or trial and error to find how it works at lower levels and where the real minimum will be. Thanks to all for the discussion/input.

[Formulajones]

We pretty much drag race with nothing less than a half tank anyway. Not that we are worried about uncovering the pump, but because on a small 275 tire in a 4,000 lbs car cutting 1.5 60 foot times, traction is at a premium. Especially when track prep sucks.

So we find that the extra weight in the rear helps the 60 foot be more consistent, and better ET's as a result, despite carrying an extra 50 lbs. down track.

I find this especially true when running my bird with stock tires, where it runs it's best times with a near full tank of gas. And the old trick of putting water in the spare tire for extra weight also helps.

I went through this with a couple of our 4th gens too, running stock tires, they were quicker with near a full tank because I could knock a tenth off the 60.

[Scott65]

As an update, I did get the Holley 19-432 tank assembly. It uses the 400lph pump. So far, at around 1/2 tank, I can uncover the sump on the street, with a rolling hard stab of the throttle. NOT impressed... I will work to see if it can be made better. But if it takes more than about 4 to 5 more gallons, I will consider this an expensive, utter failure. I will update again to try to save the next guy...

[Formulajones]

Geez hate to hear that Scott.

I'm getting ready to order another Tanks Inc setup with a 400 lph pump and plumb another car.

[JLMounce]

Well that certainly sucks.

I'm just throwing out ideas here, but what about stuffing some fuel cell foam in the sump can to try and control slosh on that initial hit?

I'm scratching my head on this one, but another idea would be to run a secondary drag race cell in the trunk. Something small, but have it either gravity feed, or pump fuel into the return. This doesn't solve the slosh issue, but the added return volume may overcome it.

[Formulajones]

Moon tank up front mounted on the grill

[Tom Vaught]

Originally Posted by Scott65

As an update, I did get the Holley 19-432 tank assembly. It uses the 400lph pump. So far, at around 1/2 tank, I can uncover the sump on the street, with a rolling hard stab of the throttle. NOT impressed... I will work to see if it can be made better. But if it takes more than about 4 to 5 more gallons, I will consider this an expensive, utter failure. I will update again to try to save the next guy...

I would get in touch with Holley on the 19-432 tank as the information says:
"EFI style tank baffling includes a large 4.3 liter internal fuel tray to prevent fuel pump starvation." AND YOU HAVE FUEL PUMP STARVATION.

They should send you the purchase price of the tank (your money) back.

Tom V.

Question, Are you using the Holley Hydramat inlet filter or the Walbro stock inlet filter?

ps Use words like False Advertising.

[Scott65]

Using the inlet screen that came with the pump. I can always go back to the original tank, but I wanted to get away from an externally mounted pump for safety reasons. (Leaks when pump/motor seals leak) My sumped tank and Pro tuner efi pump didn't have starvation issues though...

[Firebob]

I was talking with some manufacture reps( wish I could remember the brand) at Reno this last year and they were touting their tank and pumps with a fuel containment foam arrangement that surrounded the pump/pickup area. I just had to wonder how long that fuel would last without being refreshed. Also I can't imagine it was designed as one way material. I'm sure the fuel has as hard of a time entering the containment as it does leaving.

[Scott65]

I'm probably gonna try 5-6 more gallons of fuel tonight and if that doesn't help(fix it) then I'll call Holley tomorrow. The hell of it is I was planning a trip to the dragstrip for the first time in almost ten years for tomorrow evening. Will be my first time with the roller and SD cnc ported heads... Was hoping to dial in the efi fuel curve, and prove its 10 second capable, as it should be...

[64speed]

The pickup sock popped off the end of the pump when I was installing my pump. If how hard it was to get the sock out is any indication of how good the baffle is I’d say it’s great!

[Scott65]

It's only great if it works in all the conditions in which you use the car...

[Formulajones]

Originally Posted by Scott65

I'm probably gonna try 5-6 more gallons of fuel tonight and if that doesn't help(fix it) then I'll call Holley tomorrow. The hell of it is I was planning a trip to the dragstrip for the first time in almost ten years for tomorrow evening. Will be my first time with the roller and SD cnc ported heads... Was hoping to dial in the efi fuel curve, and prove its 10 second capable, as it should be...

Yep, just fill it up and you'll make your drag race date.

We've run our tanks Inc setups around half a tank without issue depending on how long the race day is, but we prefer to fill them anyway and generally don't like to start with less than 3/4 tank or so. Prefer the extra weight over the tires, especially since the track doesn't feel they need to do any prep for us street car guys.

[Tom Vaught]

Are you adding any "additives" to your fuel?

I had a batch of fuel kill a inlet sock in a couple of days.
Race fuel left me stranded in Nebraska until I jacked the car up, pulled the sender/ fuel pick-up, threw the sock away, and drove another 1500 miles without an issue.

Melted that sucker to where there was only a couple of points were fuel was getting to the engine.

Tom V.

[Scott65]

Tom, just pump premium fuel. No additives.

[Tom Vaught]

Some of the earlier Walbro EFI 400 liter/hr pumps were NOT Ethanol compatible.

Does your Premium Fuel have any ethanol in it?

Tom V.

[Scott65]

It "may" have up to 10%. I bought this from Holley, surely they're not holding old inventory at this point?

[Scott65]

I haven't installed the content sensor yet. When I do, I will be able to know exactly. It's on the list...