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Any input on the new Aeromotive Gen II Gas Tanks on a 70-72 Olds Cutlass? Good or bad?
The setup looks stout and well engineered. Can pump for carb and EFI fuel pressures (with regulator). Pump is also E85 compatible and submerged to keep it cool and helps with fuel slosh.
Wow. Thats cool.
It’s actually not a bad price either.
Once you buy a tank, buy a sump, have it welded in, but a aeromotive pump and sender unit, then paint it...you’re pretty close to that price.
Good deal!
I had Gen 1 and had nothing but problems as fuel level decreased, tried to retrofit Hydramat but couldn’t make it happen. If I could have bought just the foam “sump” used in their OE tank retrofit I would have gone that route. Bought what I would call Gen 2 but I guess they would go with Gen 1.5, with “clipped front corners” and new baffle system, problems solved. My guess would be this is the latest iteration, that does away with steel baffles ($$$?) and uses the foam sump. Should work nicely.
I used it in my LS swap and I'm very happy with it, no issues. After having countless problems with Tanks inc. FI tank on another car I decided to try it out.
We tested the Stealth 2 with 3 gallons of gas in it. Hard cornering, acceleration from stop, accelerating up steep hill, and never once did it have an issues sucking in air. At the end it was running on fumes, but not one hiccup.
Running 340lph pump through Magnfuel regulator.
Comes pre-assembled and ready to run.
The Stealth Gen 2 is a good setup - it's the Phantom pump bucket in the middle of a stock-ish tank, with an outlet head more or less located where the stock one was. I would have gone with that, but I wanted to change the fuel sender (long story, and ended up not mattering), and that would be a particular PITA on that unit.
The Stealth Gen 1 is OK. It's a tank with a small baffle bucket, then a pump stuck in it. Better than using one of those drop-in electric pumps with the little bathtubs attached to them. I'm 99% certain it's actually the Tanks Inc tank, just with an Aeromotive pump. Given it's the same tank, the price is painful.
The Tanks Inc tank has a bucket, about 10"x7", on the front driver's side. The bucket has two tubes welded to it to let fuel into the bucket. The tubes each wrap 1/2 around the bucket. That lets fuel slosh into the bucket from gravity pretty easily, but the fuel has to wind its way through the tubes under cornering forces, limiting how much flows back out. The bucket is welded onto the bottom of the tank, and the tubes are on the side, so the bottom 1/2" of fuel or so can't get into the bucket.
If you're serious about being able to run below 1/4 tank with EFI, then it seems to me there's only two solutions: the Phantom fuel baffle or the Holley Fuel Mat. I got the Tanks Inc tank and modified it to stuff a Phantom inside. Good idea? No. But it works quite well. I can also add the "Apex" siphon pump to pull the last drop of gas out of the bottom of the tank. Yes, this is dramatically over thinking the problem.
Just came in !
Ordered a Gen 2 in January.
Gen 2 has the return line dumping into the pick up baffle.
Hopefully this helps performance at 1/4 tank range.
My Gen 1 needs to be over 1/2 full for hard pulls. (Good for 500 hp or less)
The jury is still out.
I have a Gen 1 fore sale !
You can run a Factory style fuel tank, use an internal or external lift pump which fills an external surge tank/swirl pot. There is a high pressure pump mounted in or out side the bottom of the external surge tank/swirl pot which pushes high pressure fuel forward to the engine. Fuel is returned from the bypass regulator to the swirl pot and overflow from the swirl pot goes back to the fuel tank.
Complicated? Yes
Works great for cornering or drag racing or street driving? Yes
Full capacity fuel tank? Yes
No limitation on what the single in tank fuel pump can flow? Yes, we run two external lift pumps Facet 480532's and two Bosch 044 genuine motorsport high pressure fuel pumps
E85 capable? Yes, the 044 bosh pumps will work with E85 if you run some of the top end lube with your fuel
Do you need a setup like this for less than 600hp? No, I am just not expecting to go down in power from here forward, and this setup is capable of ~1200+hp with the correctly sized injectors.
just my $.02
Last edited by Battenrunner; May 24th, 2021 at 09:10 PM.
Wait, what? Granted, my car has been through a lot in its 50 years, but I'm pretty sure the bolts are just normal bolts that go up, and there's a U-nut hanging onto a tab sticking out above the tank. Many many years ago I got extremely long bolts to make install easier.
Gen 2 results are in.
The new gen2 tank is not a whole lot better than gen1 for 1/2 tank or under during hard acceleration.( perhaps slightly)
I had a hick up and lost pressure(air bubble) for a blip running a 1/2 tank of fuel in the 1/4 mile.
I did however pull my best ET of 10.24 @ 130.6 MPH, so it was putting out.
Looks like full / 3/4 tank is needed to run hard !
Street car, AC, tunes, full interior and full exhaust, 4100lbs.
Guess a few more lbs wont hurt.
I think fuel would still run out of the bucket during sustained acceleration. It would be very interesting to pull the bucket and install their check valves - see if that changes anything. Even then, the bucket holds maybe a quart of gas?
It's just time to rear sump the tank.
I would install a surge tank/swirl pot with another high flow/high pressure pump inside that your current high pressure fuel pump can feed and fill.
That way you don’t waste what you have with this fuel tank setup already. I would get a 3 liter one made to run the Bosch 044 single pump or pumps, which is roughly more than or equivalent to 3/4 of a gallon.
You can mount it in the engine bay or the trunk.
The radium setups are very nice but big money and they don’t have much capacity in the tank(the largest one is 2.2 liters), which might not be enough if your in-tank pump experiences starvation for more than 3-4 seconds.
In my Gen 1 tank not enough depth to fit hydramat in between pump and tank. I considered making a spacer ring between top of tank and bottom of mounting flange but I also couldn’t clear the sump wall.
I had Gen 1 and had nothing but problems as fuel level decreased, tried to retrofit Hydramat but couldn’t make it happen. If I could have bought just the foam “sump” used in their OE tank retrofit I would have gone that route. Bought what I would call Gen 2 but I guess they would go with Gen 1.5, with “clipped front corners” and new baffle system, problems solved. My guess would be this is the latest iteration, that does away with steel baffles ($$$?) and uses the foam sump. Should work nicely.
Originally Posted by olds_freak
The amount of money they want for that Hydramat is laughable. 3"x15" is $200. Get out of here with that.
In my Gen 1 tank there was not enough depth to fit hydramat in between pump and tank. I considered making a spacer ring between top of tank and bottom of mounting flange but I also couldn’t clear the sump wall.
Just came in !
Ordered a Gen 2 in January.
Gen 2 has the return line dumping into the pick up baffle.
Hopefully this helps performance at 1/4 tank range.
My Gen 1 needs to be over 1/2 full for hard pulls. (Good for 500 hp or less)
The jury is still out.
I have a Gen 1 fore sale !
What kind of gas cap do you run with your Aeromotive tank? Vented or non vented?
How did you route your vent line from the back of the gas tank?
I used it in my LS swap and I'm very happy with it, no issues. After having countless problems with Tanks inc. FI tank on another car I decided to try it out.
We tested the Stealth 2 with 3 gallons of gas in it. Hard cornering, acceleration from stop, accelerating up steep hill, and never once did it have an issues sucking in air. At the end it was running on fumes, but not one hiccup.
Running 340lph pump through Magnfuel regulator.
Comes pre-assembled and ready to run.
What kind of gas cap do you run with your Aeromotive tank? Vented or non vented?
How did you route your vent line from the back of the gas tank?
Ive been running a gen 2 aeromotive tank in my ls swapped 71 for 2 years now. Vent tube just runs up and ziptied to the frame and its been fine ¯\_(ツ)_/¯
Ive been running a gen 2 aeromotive tank in my ls swapped 71 for 2 years now. Vent tube just runs up and ziptied to the frame and its been fine ¯\_(ツ)_/¯
May 15th, 2021, 06:43 PM
