RONIN LSX

iTrader: (44)

I have a 98 and I remember reading about fuel tank swaps with 98s.

What's the point?
What are the Pros and Cons?

LS1Formulation

iTrader: (13)

I think it's because it's a one year only tank, and years ago there weren't companies making fuel systems for it. However, Racetronix makes drop in set ups for '98s, I have one in my Formula. The steel tank has a bit more capacity, but otherwise I don't see much difference between the two tanks besides construction. It's kind of a "if it's not broke, don't fix it" type of thing.

RONIN LSX

iTrader: (44)

Cool deal, thanks for the reply bro 👍

RPM WS6

iTrader: (3)

It's actually the other way around; steel tank is 15.5 gallon (1993-98) and plastic is 16.8 gallon (1999-02).

I would suppose that the plastic tank would be a bit lighter, but I've never weighed them so I don't have specific numbers. The plastic tank would also be immune to rust, but that doesn't really matter if you're using the car regularly.

Overall, I don't personally see any compelling reason to go through the hassle of switching from one to the other.

LS1Formulation

iTrader: (13)

Weird, I always thought it was the opposite. Shows what I know, lol.

RONIN LSX

iTrader: (44)

Thank for the reply bro 👍

RONIN LSX

iTrader: (44)

I just thought of something. I half *** remember hearing that one of the tanks had sump, or something that read true on the gauge when under 1/2 a tank. Something to the point, before a 1/2 tank, the gauge is correct, but after, because of the internal design, like a slope, the gauge, so that why the gauge drops more rapidly after the 1/2 way mark. So one of the tanks have a sump / baffle to properly regulate the amount of fuel in the tank with the gauge... something like that.


I know that I'm explaining it badly, but I hope it gets my point across lol...

the_merv

iTrader: (88)

I get what you are talking about, it's the triangular shape of that Fbody steel tank.

RONIN LSX

iTrader: (44)

Glad someone was able to make sense of my incoherent babble 🤣

So it's the 98 steel tanks, that are the issue with the gauge fuel reading thing?

I don't remember my CETA ever doing it or my post 98s, but I rarely ever get
under 1/2 a tank, before hitting the pumps.

the_merv

iTrader: (88)

Yup my 95 Z28 and 98 SS if you were below half tank you were actually at like 1/3. I never let mine get to half, filled it up at like 5/8, which was a true 1/2.

RPM WS6

iTrader: (3)

Because of how I use my '98 (show car, mostly sits in the garage, very low mileage), I always make it a point to run the tank down pretty low each year before winter storage - that I way I can fill the tank full with fresh fuel (treated with Stabil + Red Line SI-1) prior to it sitting all winter. I rarely put more than one tank of gas through this car each year, so I have to let it run low to get all of last year's fuel out. I can't speak for the accuracy of the gauge in the range of 1/4-1/2 (I don't really ever fill up in this range), but I always try to run it down to about ~1/8 tank (or at least below 1/4), at which point it always needs 12-14 gallons (which is reasonably accurate for a 15.5 gallon tank).

Overall, I don't recall much difference in fuel gauge operation between my '99/'00/'02 cars vs. my '98.

RONIN LSX

iTrader: (44)

Thank for the reply bro 👍