LS3 engine swap evap
Thread Starter
Teching In
Joined: Oct 2022
Posts: 2
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LS3 engine swap evap Hi everyone!
New to the group and first engine swap I'm getting into.
I would appreciate all your help and thank you in advance for that. Chevy enthusiast but not very familiar doing this swaps and trying to get it right. I'm learning as I go. I also used to count with some help when I started but now I'm on my own. The engine I'm using is a LS3 crate engine. I have some things figured out but the one is giving me some headaches is how to run properly the evap system (or deleted) and vent the fuel tank. Which lines/hoses I should route from the tank to the engine, ports to plug... I read some info out there but everything at this point seems a little confusing. Due the donor vehicle was originally an old diesel there is not charcoal canister or anything I can use as example. If anyone have a good diagram, knows a shop manual that it would help with the task or could point me in that right direction it would be great.
Thank you again.
Alex.
New to the group and first engine swap I'm getting into.
I would appreciate all your help and thank you in advance for that. Chevy enthusiast but not very familiar doing this swaps and trying to get it right. I'm learning as I go. I also used to count with some help when I started but now I'm on my own. The engine I'm using is a LS3 crate engine. I have some things figured out but the one is giving me some headaches is how to run properly the evap system (or deleted) and vent the fuel tank. Which lines/hoses I should route from the tank to the engine, ports to plug... I read some info out there but everything at this point seems a little confusing. Due the donor vehicle was originally an old diesel there is not charcoal canister or anything I can use as example. If anyone have a good diagram, knows a shop manual that it would help with the task or could point me in that right direction it would be great.
Thank you again.
Alex.
TECH Fanatic
Joined: Sep 2008
Posts: 1,621
Likes: 519
The vent for the fuel tank can be as simple as a vented gas cap. The LS3 will only need one pressure fuel line up to the fuel rail. I like to use -6 SS line. Along with a FFR (fuel pressure regulator) near the tank. I like to use the C5 2004 and earlier FFR. I never used a EVAP system on my LS swaps.
Good luck with your swap.
Good luck with your swap.
Thread Starter
Teching In
Joined: Oct 2022
Posts: 2
Likes: 0
Thank you so much for your help.
I think I use the same fuel line as yours up to the fuel filter regulator (I used this one PF5493 if I'm not mistaken). Then a small section of regular fuel injection hose to the tank. To Vent the fuel tank I was thinking of using this: GM20995472.
I think I use the same fuel line as yours up to the fuel filter regulator (I used this one PF5493 if I'm not mistaken). Then a small section of regular fuel injection hose to the tank. To Vent the fuel tank I was thinking of using this: GM20995472.
