LTX and LSXPutting LT1's, LS1's, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects, including repairs, swap info, and performance upgrades.
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I'll post some photos from under the car and engine bay soon, i used the stock line and filter assembly, other photos will make more sense. Once i figure out how to change the signal from the ls1 fuel level sender to the factory range i'll post it up as well.
If anyone has some comments or things for me to add let me know. This forum has been very helpful to me, and i want to put info out there to contribute as well.
Thanks,
James
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very nicely done! one quesiton though, you said it needed custom lines made, is that needed because its hard to splice metal lines together or our stock lines not work period?
The LS1 tanks come with plastic lines, which i don't believe you can splice with metal. You may be able to use the plastic lines and the ls1 fuel filter etc - but i did not have these (they were cut when i bought it).
wow wasnt aware of the plastic lines. also what is the weight difference between the two? and if you have the tank installed in the car, does it look factory? someone mentioned that it doesnt fit right and i was curious as to what fit differently.
Good info. I'm currently in the middle of getting my plastic tank ready to go in, and this info will make it a little easier. With my tank they cut all 3 plastic lines that connect to the sending unit, so i think i'll have to see if gm will sell just the vent line.
I'm not sure if the wieght is much different, maybe a little lighter. It fit great, used the factory hangers on the 3rd gen, heat shield went in around it fine. I had to get some fuel hose to make a filler neck. The fuel inlet is metal and you can drill a hole in the wheel well to hold it in place with a bolt - very sturdy, looks factory.
I did a lot of searches, and there is some good info out there - just thought that i would add some.
Are all the ls1 tanks the same?I can get an 00 tank with the lines.Should I get the plastic lines and use them or use the stock 3G lines attached to the lines from the ls1 tank?
98 had metal, maybe 99 too. 00-02 definitely had plastic. Get the plastic lines and the metal fuel T and fuel filter. These will swap right in and your stock metal line will thread right in. Then all you need is some hose and clamps for EVAP.
I just went to gm a few days ago and ordered the small vent line that comes out of the sending unit, and that little plastic hose cost $26. I'm sure the other plastic lines will be even more.
Z28evans where did you get your t-block from. I tried pricing one out at gm and to get one they said its one of a set of like 15 parts that you need to buy. I think it comes with the metal lines, but not sure.
Cut the original line above the frame and attached the braided line there ( the extra fittings at the bottom are for the sender for an electric fuel pressure gauge). I like this settup better than coming out front like the factory tpi did and running the new braided line back to the ls1. Also there is no fuel pressure regulator also making it cleaner looking in my opinion.
parts you can get at any local autoparts place for cheap:
Used stock line and 89 camaro filter and bracket. Cut and added a T after the filter on the stock line. Ran a new 3/8 fuel line to the tank for the return.
joining lines from the tank to the fuel filter (used the stock fuel feed line to the filter, and made a 3/8 line to go to the T after the filter.
Looking good james....Looks like its going to work. I wasnt to sure of how you were going to do it but now it makes more sense this way. Do you have any more pics?
More pics of what
That pretty much sums up the fuel system for me. I removed the unused (in my case) evap and return lines, the other line going to the front is the brake line.
***Beautiful day, 69F, really want to be working on it right now but i'm stuck at work
does anyone know if the LS1 tank and fuel pump will work for a '93 LT1? my buddy totaled his last night...so, fortunately and unfortunately, i can get one for cheap.
what did you use to connect your steel fuel line to the plastic lines on the pump, looks like a very clean connection there.
I used some of the push on connectors that most autoparts places carry (often in the 'help' isle). They come with barbed ends, i cut the barb off and used a compression union to attach the push connector to the 3/8 tube. There are some places that sell push connectors that have AN threads so you can use some russell or other companies braided lines. That would be the preferred way, but they were on backorder when i needed them.
Quote:
does anyone know if the LS1 tank and fuel pump will work for a '93 LT1
They have the same physical size i think, but i'm not sure about the fuel pressures or fuel level senders.
I used some of the push on connectors that most autoparts places carry (often in the 'help' isle). They come with barbed ends, i cut the barb off and used a compression union to attach the push connector to the 3/8 tube. There are some places that sell push connectors that have AN threads so you can use some russell or other companies braided lines. That would be the preferred way, but they were on backorder when i needed them.
Very nice work we have 'help' products at my work just dont stock any of those, tomorrow i'll look it up and get them on order, thanks for the help no pun intended
MJ
__________________ 1988 Camaro IROC-Z
99' LS1/T56 swap.. now rumbling..
I used some of the push on connectors that most autoparts places carry (often in the 'help' isle). They come with barbed ends, i cut the barb off and used a compression union to attach the push connector to the 3/8 tube.
Can you snap a picture of that junction of the plastic/metal lines when you're under the car next?
Quote:
Originally Posted by z28evans
There are some places that sell push connectors that have AN threads so you can use some russell or other companies braided lines. That would be the preferred way, but they were on backorder when i needed them.
Braided lines all the way to the front of the car? That doesn't sound too safe to me.
I've wired it up on my '84 T/A but have not completed the wiring so I do not yet know if it works or not.
BTW- for an earlier post- the 4th gen fuel lines are a combination of plastic and metal. They're only plastic on the last foot or so at the back of the car by the tank. I grabbed the fuel lines from the 4th gen donor car and installed them onto my '84 T/A. I had to shorten them up near the front and bend them to work, but the underside/ rear of the car worked perfectly.
I used those compression fittings from Pep Boys to seal the lines back together.
I haven't messed with mine, i know where empty is (half tank on gauge) and fill when i need to. Some day if i get bored i'll tackle the gauge issue. Having too much fun driving it
Two months since the last post... but, I'm curious:
I see that there you have no plug or wires on the charcoal canister box deal to the lower right side on the new plastic ls1 tank. Did you plug this black piece in? Has anyone hooked this up?
I didnt even realize it was there until today when I looked closer at it.
Is this a necissary thing to wire up?
The EVAP box helps remove fuel vapor. You don't have to hook it up... it depends on if you want to be smog legal or not, or if you don't want to directly vent to atmo. If you want to wire it up, here are the wires from the fuel tank to a 2002 PCM:
EVAP Solenoid:
0.5 Pink (20 awg) - Connect to Eng Ctrl Fuse (15A)
0.35 White (22 awg) - Connect to PCM C2 pin 45 (EVAP Canister Vent Solenoid Control)
Fuel Tank Pressure Sensor:
0.5 Orange/Black - Connect to PCM C1 pin 23 (Low Reference)
0.5 Gray/Black - Connect to PCM C1 pin 46 (5V Reference)
0.5 Dark Green - Connect to PCM C2 pin 64 (Fuel Tank Pressure Sensor Signal)
I bought this tank too and have done the 0-90 ohm modification. I have yet to put it in the car but I thought I would add the way I am plumbing the tank into the car. I found this at Summit so you can use a 6 AN line directly from the tank. So if you didnt get or dont want to use the factory stuff you dont have to. I have to order a few more fittings to get everything the way I want it but once I get it all I will post up some pictures. Despite what the description says on the Summit site the adapters are 6AN, I called Edelbrock to verify this and have them in hand now so I know a 6 will fit.
Anyone have any idea about how to wire up the regulator?
What are you referring to here? The pump? The regulator doesnt have wires on it. it looks like a miniture version of an LT1 regulator but it is in the pump can.
Like I said look through posts with my name and do some reading click here (How-To: Modify LS1 Fuel Sender for 0-90 Ohm Use). There were a few other places where the wiring was posted.
Going to the fuel pump plumbing, if you have the tank out or can see the top if the filler neck is on your right hand side then the hose on the right out of the tank is the feed and the one on the left is the return. I think the one in the middle is the vapor line
I guess the link button doesnt work properly in IE7, looks liek IE7 and vista sucks, stupid computers
Could i just go to the dealer and get one along with the plastic fuel lines? 
no pun intended
