Converting gas tank for lt1

[ingersoll113]

Was wondering if I can use an in line fuel pump on the supply side and use the vent (the one that goes to charcoal cannister) on the return side in an LT1 conversion. I realize I would need a vent, but I will be pulling out more than I will be returning. Any thoughts would be appreciated. I know this might get me flamed, but just throwing it out for discussion. Thanks in advance.

 

[JERMzSS]

I used my vent for a return for a few weeks and some where (cant remember where) I read that it was a bad idea. You need your return line submerged in the tank.

I managed to find a GN sump at rockauto.com and used it with my factory non-baffled tank until I could find a baffled EFI tank.

 

[JERMzSS]

ok I just check Rockauto.com and they still show to have some of these and trust me. Unless your the luckiest person on the planet you wont find a used one this cheap.

SPECTRA PREMIUM Part # FG156A Includes Fuel Sender, Float and Strainer (Fuel Pump Not Included)

$94.79


^^ you can modify that to run a inline pump or mount a pump to it.

 

[DRIVEN]

The answer to your question is - yes. But you would be better off to use a late Monte Carlo tank for a TBI application and swap out the low pressure TBI pump for an appropriate TPI/LT1 unit. This should be a direct bolt in using OE parts...no hacking.

 

[FE3X CLONE]

The answer to your question is - yes. But you would be better off to use a late Monte Carlo tank for a TBI application and swap out the low pressure TBI pump for an appropriate TPI/LT1 unit. This should be a direct bolt in using OE parts...no hacking.

I agree. Either a Monte's TBI tank or a GN's tank will bolt right in and give you a factory in-tank electric pump. Super simple. 8)

 

[anakputa]

Swap the hoses for the line's by the rear axle. Vent is now fuel and fuel is now vent. I did this until I bought dedicated tubing for the fuel line for the car.

 

[ingersoll113]

The answer to your question is - yes. But you would be better off to use a late Monte Carlo tank for a TBI application and swap out the low pressure TBI pump for an appropriate TPI/LT1 unit. This should be a direct bolt in using OE parts...no hacking.

I agree. Either a Monte's TBI tank or a GN's tank will bolt right in and give you a factory in-tank electric pump. Super simple. 8)

Ok, but all the cars in my local yards have had the tanks pulled before they are placed in the line up. Where do I find one of these tanks?

 

[ingersoll113]

ok I just check Rockauto.com and they still show to have some of these and trust me. Unless your the luckiest person on the planet you wont find a used one this cheap.

SPECTRA PREMIUM Part # FG156A Includes Fuel Sender, Float and Strainer (Fuel Pump Not Included)

$94.79


^^ you can modify that to run a inline pump or mount a pump to it.

Checkin it out now, Thanks...

 

[ingersoll113]

ok I just check Rockauto.com and they still show to have some of these and trust me. Unless your the luckiest person on the planet you wont find a used one this cheap.

SPECTRA PREMIUM Part # FG156A Includes Fuel Sender, Float and Strainer (Fuel Pump Not Included)

$94.79


^^ you can modify that to run a inline pump or mount a pump to it.

Checkin it out now, Thanks...

So if I use this part, I could use an inline pump and have a return and a vent. As long as I don't run low on gas, why is it so important to have baffles? I notice on rockauto that the 1986 4.3 monte and the 1980 malibu have the same GM3C tank, please un confuse me.

 

[Randy_W]

My 1967 Impala SS has been running an inline pump and using the vent for the return since Decemeber 2000 when I did the LT1/4L60E swap with no problems. I've done 3 other swaps since and all are the same way, if I don't have a third line for a vent, I just use a vented cap. :wink: