I see on lt1swap that you run a 4 fuse setup with 3 ign hot and 1 constant hot for the orange wires on the computer.


Now in my truck harness I have coils, injectors, maf, heated 02s, and pcm ign hot.

Which circuits should I combine for each of the 3 fused circuits, and are the 15amp fuses more than enough for this?

 

Clip another block on. You really dont want to gang power wires together

 

this is one of the last things i've got left for wiring, love the layout. saving this diagram for spring

 

Is 18 Gauge wire sufficient for all connections in this fuse block?

 

I was going to extend the wires and use 14 gauge, only because I have a large bulk spool of it. Guess I'll end up using my entire 6 circuit fuse panel on it

 

The indiv fuses can be 18ga

Fuel in/out needs to be 16ga minimum. IGN relay in/out 12ga and the block jumper needs to be 12ga. AC relay 18ga all of it. Fans need 12ga in/out. Grouping the feed wire as in the diagram it needs to be 10ga

 

Builders need to vertify the relay pin assignment as they differ per each relay Mfg. There are very few high current relays that have pins 85 and 86 placed vertically on the right side. Gm relays have them diagonal as well as Bosche.

 

The shape of the relays makes no difference, only that the proper terminal is used. Thats why the key to the diagram was given

 

Understood, that's why I said "Builders need to vertify the relay pin assignment"

 

Thanks for the diagram and clarification on wire sizes Pocket.

 

so this is the fuse block you made to get yours to run? I have a t56, do I need the trans fuse or is that just for auto trans?

 

Basic stand alone fuseblock layout for LTx/LSx engines used by carbed 3rd gens and other non EFI cars. Original EFI cars like my 92 have ample fuses/relays in place from the factory so they get reused

T56 still has a reverse lockout solenoid which has a fused wire. Yoou can group it with another one like fans or HO2s, but why bother. Not like you're hurting for fuseblock slots

 

Is there a nice, neat way to mount relay sockets? I'm looking at something like this ( http://bluesea.com/category/5/21/productline/126 ) for the fuses, but I've not found anything near as nice looking as the relays. My car orginally had a carb, so I don't have the exsisting fuses...

 

http://www.lt1swap.com/fuseblock_obd2port.html

I use those. They nest nicely for a tight assembly. You need two fuseblocks and 2-5 relays for a 3rd gen conversion

 

same here, exact same parts for mine. now i just need to finish wiring it all up and get it in the engine bay

 

Can one of you post pics of how you have it mounted? Right now I have a rats nest, I'd like it to look clean when its done. Where did you mount it?

 

mine's still in the works, but at least it will give you an idea of what it *could* look like

 

Frame rail between the battery and radiator as far forward as possible. Out of sight, easy to access

 

Thanks guys! Now I just need to figure out how I want to run this to keep it clean!