Bigger Fuel Tank?
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 23
Likes: 0
From: Edmonton, Alberta, Canada
Car: 88 iroc-z
Engine: Year one 383 Extreme Tork
Transmission: Tremec TKO 500
Axle/Gears: Moser 12 bolt
Bigger Fuel Tank?
Is there anyway of putting in a bigger tank while having not too much custom work?
Joined: Aug 2006
Posts: 12,812
Likes: 110
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Bigger Fuel Tank?
no, it would all be custom. the area and design of the tank/floor doesn't lend well to addition capacity.
may i ask why you feel you need for capacity, and how much more?
may i ask why you feel you need for capacity, and how much more?
Supreme Member
iTrader: (1)
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Re: Bigger Fuel Tank?
What, do you really get that bad of gas mileage? 
I get a lousy 200-220 miles/tank .
I get a lousy 200-220 miles/tank .
Supreme Member
iTrader: (8)
Joined: Jul 2001
Posts: 3,204
Likes: 7
From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: Bigger Fuel Tank?
Also remember additional fuel = more weight. More weight means more fuel burnt in stop and go traffic.
Joined: Jan 2001
Posts: 3,188
Likes: 59
From: Conroe, TX
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Re: Bigger Fuel Tank?
The 4th gen LS1 tank is supposedly a gallon larger and fits well. You'll have to figure out how to tie it in with your fuel lines and most likely swap fuel pumps as well.
Senior Member
Joined: Mar 2010
Posts: 567
Likes: 2
From: middle of nowhere between farms in New York
Car: 1987 pontiac firebird
Engine: 6.5 turbo diesel
Transmission: t56
Axle/Gears: Ws6 axle
Re: Bigger Fuel Tank?
i have thought about building a custom fuel cell and putting it in the well behind the rear axle.
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