87 MCSS LS1 swap-gas tank
#1
Teching In
Thread Starter
Join Date: Nov 2008
Location: NJ
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Hey I'm a fuel injection NEWWWB. Haha. Can anyone give me some advice/info or forward me to a different thread (couldn't find one) on how to modify the stock gas tank on my 87 Monte Carlo SS for EFI (just bought an LS1 and am in the process of swapping out the stock carbureted 305). I found a company that makes in-tank pump tanks that are really nice but they're $1200 and if can use my stock tank (which is only 2 yrs old) and save some cash that'd be great. What do I need to get to modify the tank for EFI? I'd rather have an in-tank fuel pump than an external one but is that going to require crazy amounts of fabrication? We are re-doing fuel lines and I'm going to high pressure lines and have most of the other plumbing figured out. Will I need to get a sending unit, and what's the deal with return lines and do I need one? Thanks for any help! Is there anything specific to swapping to EFI with an LS1 to think about or any specific parts that would be best to go with?
-Jen
-Jen
#2
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Is it a steel tank? If so it would be easy to just add two bulkhead fittings to the bottom. One for an external fuel pump, the other for the return. You will also have to install a fuel pressure regulator on the return line to maintain 58 psi.
#3
LS1TECH Sponsor
iTrader: (16)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'm currently putting a dual in-tank setup together for one of these. Once I have this scienced out, I'm sure the single will be much easier to accomplish.
Depending on your needs for lines, rails, regulator etc., I can put together a system for you with all components required.
Let me know if I can be of assistance.
Depending on your needs for lines, rails, regulator etc., I can put together a system for you with all components required.
Let me know if I can be of assistance.
#5
TECH Fanatic
iTrader: (38)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Hey I'm a fuel injection NEWWWB. Haha. Can anyone give me some advice/info or forward me to a different thread (couldn't find one) on how to modify the stock gas tank on my 87 Monte Carlo SS for EFI (just bought an LS1 and am in the process of swapping out the stock carbureted 305). I found a company that makes in-tank pump tanks that are really nice but they're $1200 and if can use my stock tank (which is only 2 yrs old) and save some cash that'd be great. What do I need to get to modify the tank for EFI? I'd rather have an in-tank fuel pump than an external one but is that going to require crazy amounts of fabrication? We are re-doing fuel lines and I'm going to high pressure lines and have most of the other plumbing figured out. Will I need to get a sending unit, and what's the deal with return lines and do I need one? Thanks for any help! Is there anything specific to swapping to EFI with an LS1 to think about or any specific parts that would be best to go with?
-Jen
-Jen
http://www.gbodyparts.com/product_in...0a98dfdfcc4b47
http://www.gbodyparts.com/product_in...0a98dfdfcc4b47
If your tank doesn't have baffles, you should be able to find a tank for a tbi monte carlo or for a grand national (something that had fi) and use it with one of the senders above.
You can either do the fuel setup with or without a return line, depending on how the fuel rail is setup on the motor you bought. If the pressure regulator is located on the fuel rail, you'll have to run a return line back to the tank. If not you can either run a pressure regulator near the tank and return line back to the tank (which will be shorter) or run a corvette fuel filter which I believe has the pressure regulator built in.
I would suggest searching through some threads in the “conversions and hybrids” section here and would check out JohnB ‘s swap on his Monte Carlo.
https://ls1tech.com/forums/member.php?u=1099
Here’s some other links that might be helpful:
http://www.maliburacing.com/forum/index.php
http://www.maliburacing.com/forum/vi...ed665be96566bb
http://www.maliburacing.com/forum/vi...ed665be96566bb
Hope this helps