1997b4c

why can you not use a factory ls car harness or can you ?????

95mysticta

iTrader: (4)

If that was the case everybody would be doing this swap and it wouldnt cost $850 for a custom harness. Its a completely different motor with different sensors and connectors. You only utilize the cam and coil pack harness from a LS harness and thats it. Do some researching and you will find out quickly why that is.

flame

iTrader: (13)

You would need to modify the harness anyway so why not use the one you already have as opposed to buying one.

LS1
MAP sensor at rear of intake
Crank sensor by starter
Cam sensor back of intake
Knock sensors under intake plug at rear

LT1
MAP sensor side front of intake
Crank sensor front cover
Cam sensor front cover
Knock sensor by starter

Plus changing the pinouts to mate with body harness, moving coil/injector wires for different firing order

1997b4c

ive been doing the research thats the issue. i cant find anyone that states the issues you run into. yea the injectors are diff and map and such but if you run a single plane you can run an ls 90mm tb and change the injector harness. so then what do you run into. knock sensors etc this is my question....

95mysticta

iTrader: (4)

They are two completely different harness's with different ended connectors. Thats why they use the stock lt1 harness and retrofit it with the cam position sensor from an LS and the coil pack harness's. An lt1 harness can be had for a 1/3 of the cost of an LS Fbody harness. 355Z28 has done a cheap 24x swap by using a truck harness and taking out the pcm blocks, cam sensor, and coil pack harness's and fitting them into his lt1 harness. Thats about the only way you can go about if you are on the budget side and want the extra work of taking another harness apart.

1997b4c

so if you re pin for the correct firing order(which you have to pin the lt1 harness anyway) use an ls map sensor basically only thing left is to figure the knock sensor and re pin the inside. i have mutiple harnesses laying around for both cars i just cant figure how its easier to convert the lt than it is the ls harness.

1997b4c

you have these sensors correct on an ls?
tps-on 90mm tb
iac-on 90mm tb
Map-will be remote mounted due to singleplane and ls sensor
inj-can repin and change ends if necessary
knock- to be determined
cam-efi connection
crank-efi connection
ect-run ls sensor
ait-run ls sensor
oilpres-repin/change connector and use lt sensor

is this correct or am i way off on this being possible.

95mysticta

iTrader: (4)

It can be made to work just depends how much work you want to do. If you have multiple harness's giver hell and let us know how it works out for you.

1997b4c

that was my plan just figured id open it for other input. ill be sure to let any info i find out.

flame

iTrader: (13)

tps-on 90mm tb stock would be the same
iac-on 90mm tb stock would be the same
Map-will be remote mounted due to singleplane and ls sensor
inj-can repin and change ends if necessary car will be the same LS truck is different
knock- to be determined lengthen the wire and use the LT1 end
cam-efi connection
crank-efi connection
ect-run ls sensor LS sensor is metric thread, could use thread adaptor and 98 three wire sensor and add extra wire for gauge
ait-run ls sensor same
oilpres-repin/change connector and use lt sensor same

1997b4c

thanks for the input are the ls knock sensor and 96-97 compatible with each other.

flame

iTrader: (13)

They are the same internally but threads are different. Just use a 96-97 and be done.

BigBadWhitey

iTrader: (3)

Noob question. What all parts would you pull from an LS1 car if you found a wreck
and what would you be left to buy?

flame

iTrader: (13)

If you bought the whole thing then unbolt the kmember and swap the whole motor in trust me you'll like it!!!

BigBadWhitey

iTrader: (3)

My car is already supercharged, and i dont want to go through the troubles of a full motor swap with it!

95mysticta

iTrader: (4)

When you do this conversion there will be no need to want to do the ls engine swap!