EFI fuel tank for the G body Olds on a budget

There are lots of ways to do EFI fuel tanks on 78-88 G bodies. I am thrifty and put this method together a few years back before all the aftermarket options were available. It's still the best bang for the buck in my opinion so here's what I do!

[@PaulLioio-bl1hc]

Thanks for making this video. I’ve been chasing fuel starvation issues with the Holley Sniper EFI in my 88 Monte for over 2 years now. I originally thought the shop who did the install had the fuel pump sitting too high, but after dropping the tank, I saw the pump was at the right height. I was not aware that the fuel tank needs to be changed to an EFI one (apparently the shop wasn’t either). I am confident this will fix my issues.

[@PrydeWater901]

#Holley part number 12-329 will go in a stock Cutlass fuel tank with no problem. Just add relay and wires.

[@gbody_juice4016]

Just now tuning in keep that camera rolling 💪🏾🫡

[@theevolution1519]

Nice Cutlass keep it going

[@MrXerxes415]

Thank you very much for testing gravity again I was thinking it was no longer around however, you proved it

[@powers6963]

Great video! Thank you. Question - is it bad to run too large of a pump using a return-style fuel system?

[@PaulLioio-bl1hc]

Couple questions. Regarding the pass through/ bulkhead you used from Racetronix, is that part number RCS-028 or RCS-027? Also you mentioned something about the AN fittings being 37 degrees and through me off. Did you flare the ends of the hardline on the fuel sending unit side ? I thought the AN compression fittings didn’t need to have flared ends.

[@TheValiant2289]

How much was the cost of everything. I am currently looking at the Aeromotive efi tank setup for under 700.

[@demetriuslynch5785]

Nice job... I have a question my 86 Monte Carlo I replace the gas tank with the EFI but the fuel neck does not allow me to put gas in it feels out everywhere.. Where can I purchase the factory fuel neck replacement SO gas will go in the tank easier?

[@hackjobhotrodshop5075]

You can't buy replacement OEM fuel necks, that's kinda the point to save the factory one like me and put it on a new tank. Many people report issues with the aftermarket filter necks. Some people have added additional/external vents.

[@02168226]

@@hackjobhotrodshop5075so how did you get the factory fuel neck to fit in the new tank

[@corneliushall1800]

Did you upgrade the wires on top of the sending unit.?? purple - grey - black wires.??

[@hackjobhotrodshop5075]

I reused the black grey and purple wires from the spectra sending unit. I only added the red additional power feed

[@MrGoobieracing]

Where did you get the plug to feed the wires into the sender to the pump? Great video btw!!!

[@hackjobhotrodshop5075]

Racetronix is where I got the bulkhead. I got my weather pack connectors and pins from Waytek wire

[@MrGoobieracing]

@@hackjobhotrodshop5075 thank you!

[@papergatorzfedducca7998]

Did you have to solder the filler neck on new tank?

[@hackjobhotrodshop5075]

Yes I did!

[@papergatorzfedducca7998]

@@hackjobhotrodshop5075 ok thank you!!

[@fogstain]

Nice work! Do you have a part number for the sending unit you used?

[@hackjobhotrodshop5075]

It's whatever rock auto has for a 87 GN

[@danieldimitri6133]

Option A. Buy a sending unit for a 4.3l tbi Monte Carlo and swap the pump to a 255 or 340 pump and damn the baffle. Option b buy a fuel tank for a tbi v6 Monte or an efi cutlass. They're not actually that expensive and although most modern stampings are thin a few companies like liland powder coat them. Option c get a stainless sending unit from a company called quantum. It's not very expensive. Option d. Drill a hole in your stock sending unit and solder another tube into it, cut the pickup tube just below the sender arm and use the stock pickup as a return, the new tube will hook to the pump and the vent will still be a vent. There are differences in the fill tube from car model to car model, there are 3 that I know of. This doesn't always matter but I happen to have a full tube for an f150 that I could hypothetically make work with a silicone coupler a hacksaw and some kind of home made bracket behind the license plate. It happens to have about the right length and bend. It also has a provision for a vent tube so a scrap yard random fill tube is a possibility. If you're using normal injectors and not a factory tbi then you can use a gm fuel filter with a return they still them on trucks as far as I can tell. That'll give you a 58psi built in regulator and less fuel line. You may want to run 1/2" or -8 or -10 line forward of the filter so you don't lose pressure in a high hp application. The pump can theoretically use -6 to a fairly high power level but the pressure at the pump is a gonna be measurably higher than at the rail. That's fine with a rail mounted regulator and it could theoretically be tuned around but if you have the regulator in the back of the car via the fuel filter it's just a messy detail where a bigger line could save some trouble.

[@toon_on_24s]

Keep that car running

[@Super_Sport_Marc]

Why not just buy a national tank with the kneck already on it?

[@hackjobhotrodshop5075]

The Buick tank neck isn't a good fit for an Oldsmobile and aftermarket tanks have widely reported issues that they splash fuel out of them during filling due to poor venting design