Baffled Fuel Tank - How Important?
02-19-2008, 09:42 PM
#1
Baffled Fuel Tank - How Important? I am swapping an LS1/4L60E into an 86 monte carlo. Ideally, I would use a baffled fuel tank from a Grand National/T-Type or 4.3 TBI monte, but in my area they are not any available. I can get a GN sending unit with Walbro pump for reasonable. Would there be much risk in using this with my current tank? If I go this route I would be sure to keep the level above 1/4 tank at all time.
02-19-2008, 09:56 PM
#2
You would probably have to keep the tank at least half full, which is easier said than done, seems to never work out that way! If you have no baffle and run low on fuel, when you take off hard all the gas will run to the rear of the tank and the car will literally fall on its face INSTANTLY! Its a very strange feeling the first time it happens!!! I would try to find a 4.3 tank, you would be much happier in the long run.
02-19-2008, 10:43 PM
#3
I would look for a baffled tank. I swapped to a baffled tank when I did my swap and even those baffles are not really enough. When I have a 1/4 tank the fuel runs away on expressway cloverleafs if I get spirited. I had a big problem with it when the fuel strainer sock was turned the wrong way, it was bent upward on the one corner and at anything under a half tank it would suck air on a hard corner or launch.
02-20-2008, 03:16 PM
#5
TECH Resident
My fuel tank has a stainless "tray" surrounding the pickup, I think that's the least you should have. I can run mine down pretty low and still not starve it under hard accelleration.
02-20-2008, 08:11 PM
#7
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You can get a new one easily. Type in Spectra GM307C into Google. That is the part # for a '87 Buick Grand National. Its the same one I used a few years ago for the LT1 swap in my '86 Cutlass. It already has the baffling you need, and yes, you do need the baffling!
