#61  
Old 10-17-2019, 10:48 PM
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Originally Posted by Scott65 View Post
It "may" have up to 10%. I bought this from Holley, surely they're not holding old inventory at this point?
SORRY, BUT i HAD A CHUCKLE FROM THE ABOVE

Really how many Pontiac Specific Fuel Tank Systems do you think Holley sells in a year. I would bet not many.

Tanks, inc and Aeromotive, I would bet get the vast majority of the Pontiac sales of EFI Fuel Tanks.

Tom V.

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  #62  
Old 10-17-2019, 10:57 PM
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Understood, but the pump and screen I don't believe are Pontiac specific.

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  #63  
Old 10-17-2019, 10:58 PM
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And the Holley IS a tanks unit anyway.

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  #64  
Old 10-18-2019, 06:42 AM
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Late to the party here, but i think hyperfuel offers the correct tank and pump combo: https://hyperfuelsystems.com/product...tank-pump-kit/
As i understand it, hyperfuel is a collaberation between fitech and tanks inc, i got the 70-73 pontiac F-body tank with 340 liter pump, and it looks just like the one posted earlier in the thread


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  #65  
Old 10-18-2019, 07:06 AM
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Walbro 400 LPH Fuel Pump (gasoline only) & ScienceofSpeed Installation Kit - NSX, 1991-99 No ethanol use.

The 450 liter per hour (LPH) E85 compliant fuel pump is compatible with either gasoline or E85 and offers a slight flow increase.

https://www.scienceofspeed.com/index...ation-kit.html

Like I posted earlier, need to do more investigation.

Tom V.

Tanks inc has its own unique system for FITECH applications. Not apples to apples.

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  #66  
Old 10-18-2019, 07:56 PM
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I modified my original tank. Sumped, baffled, trap doors, a late model GM E85 fuel module centrally located, and second E85 450 pump located in the back of the sump, staged to come on under boost. The module keeps its bucket full via a built in venturi pump. (04 flex fuel Tahoe, ~255lph I think). All return fuel from the rails returns to the module bucket first, then overflows into the sump. I did a WOT test run with the tank so low that the fuel gage needle was just above the empty mark. No hiccups felt or seen in the datalog.
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  #67  
Old 10-18-2019, 08:29 PM
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I may be looking at that as an option^

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  #68  
Old 10-21-2019, 01:24 PM
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I may be looking at that as an option^
VaporWorx website used to have a lot of good info on this stuff. Been a few years since I looked at it though. The corner pickups are interesting.

https://www.vaporworx.com/documentation/

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Old 10-21-2019, 01:29 PM
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Thanks for the info. I didn't get a chance to do any testing yet. But I may send you a PM to discuss your mods if I don't have success with this.

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  #70  
Old 10-21-2019, 01:52 PM
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I ordered my Tanks Inc tank and 400 lph pump this morning. Going with the same setup that's proven for us to work well in our street/strip applications.

  #71  
Old 10-21-2019, 02:04 PM
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Originally Posted by Formulajones View Post
I ordered my Tanks Inc tank and 400 lph pump this morning. Going with the same setup that's proven for us to work well in our street/strip applications.
That's great , wish they had the trap door when I did mine lol.

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Old 10-21-2019, 03:04 PM
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Thanks for the info. I didn't get a chance to do any testing yet. But I may send you a PM to discuss your mods if I don't have success with this.
Sure, no problem. I tried to save most of my build info in a spreadsheet. I'll answer whatever I can.

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Old 12-15-2019, 11:39 AM
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Had a little time yesterday, so I checked to see if my problem could be caused by insufficient venting. Ran it with the cap off and a rag loosely stuffed in the neck for slosh. No help. Seems to be pump related, even though its brand new stuff. Not impressed...

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  #74  
Old 12-15-2019, 03:22 PM
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I was looking at a picture of the Holley tank vs the Tanks Inc tank and they aren't the same on the outside. The picture I found of the Holley tank still uses a ring retainer on the sending unit, where as Tanks Inc has a bolt in style.

Has me wondering Scott if the baffling may not be quite the same either. Wish I could find an inside picture of the Holley tank.

Edit: I'm seeing them both ways as I do more searching. Which one did you get Scott?

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Old 12-15-2019, 03:26 PM
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My Holley is a Tanks... Has the bolt in hanger assembly, even has the tanks part number on it if I remember correctly. I'm gonna have to take it all back apart so I'll try to remember to take a picture of the sump area. Looks the same as pics I've seen.

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  #76  
Old 12-15-2019, 04:23 PM
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Man that sucks Scott. Definitely feel for you! As you know I had similar issues with needing to run half a tank on my runs and with e85 the old fuel assembly couldn't even keep up and would drain the bucket dry because it was located up the front of the tank where my new cell has both E85 pumps at the back now with baffling around them and I know for a fact this exact tank works as the 2x Aussies (the "Ben's") at drag week continually went 8s with the same one. I know you don't want to go the cell route though. I think it was said earlier but relocating the pump near the filler neck would be the fix, but lots of fab work to a good dollar tank which would suck. Definitely keen to hear what Holley come back with for you if they do.

Let me know if you want to bounce around any ideas.

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  #77  
Old 12-15-2019, 05:32 PM
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My Holley is a Tanks... Has the bolt in hanger assembly, even has the tanks part number on it if I remember correctly. I'm gonna have to take it all back apart so I'll try to remember to take a picture of the sump area. Looks the same as pics I've seen.
Okay sounds like the same ones I've been using then. I have a new one sitting here waiting for me to install. Guess it doesn't help much now to take a pic of the sump.

  #78  
Old 12-15-2019, 05:37 PM
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I think it was said earlier but relocating the pump near the filler neck would be the fix, but lots of fab work to a good dollar tank which would suck. Let me know if you want to bounce around any ideas.
Can't relocate the pump to the rear of the tank on these factory style tanks. The fuel tanks sit at a slight angle when installed, with the bias more towards the front of the car. So when the tank is at it's lowest fuel level, the fuel is in the front half of the tank. Having the pump at the rear would have it uncovered before the tank is empty of fuel.

I've noticed the fix that Tanks Inc has employed is to make these tanks deeper on the 2nd gen F-bodies. I just installed one. They hold an extra 3 gallons of fuel more towards the front of the tank, in an effort to keep more fuel over the pump.
Unfortunately they don't have this offering for the 1st gen F-bodies or the A-bodies.........as of yet.

  #79  
Old 12-15-2019, 05:47 PM
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Quote:
Originally Posted by Formulajones View Post
Can't relocate the pump to the rear of the tank on these factory style tanks. The fuel tanks sit at a slight angle when installed, with the bias more towards the front of the car. So when the tank is at it's lowest fuel level, the fuel is in the front half of the tank. Having the pump at the rear would have it uncovered before the tank is empty of fuel.

I've noticed the fix that Tanks Inc has employed is to make these tanks deeper on the 2nd gen F-bodies. I just installed one. They hold an extra 3 gallons of fuel more towards the front of the tank, in an effort to keep more fuel over the pump.
Unfortunately they don't have this offering for the 1st gen F-bodies or the A-bodies.........as of yet.
Ahhh damn, that sucks! One way to fix it potentially would be to try a hydramat at the rear of the tank whilst the pump is still up the front. Might take a bit of arm dislocation to get it in there or putting in an access panel towards the top/rear of the tank, but could be a viable fix. I thought of doing this, but ultimate my problem was the intank fuel module (circa '14 Camaro)

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  #80  
Old 12-15-2019, 06:37 PM
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In my case, the tank is FULL. There's no possibility of slosh. Its something to do with the pump. Bad pump, cracked line, who knows. I'll figure it out eventually. Of note, it puts up good pressure under light load. Put your foot in it and it drops pressure by 50%...

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