LS3 into an LS1 Fbody questions
04-24-2015, 08:22 PM
#1
LS3 into an LS1 Fbody questions I've read through the sticky on this I can see I'll have to order a list of stuff from Katech & a lot of the stuff has to do with using the LS3 intake, which I will be going with.
KAT-4750 Cam & Knock sensor adapter harness. Seen some pics online that the knock sensors to be relocated under the headers/manifolds by drilling & tapping the block in a certain spot?
KAT-A4674 Fuel Rail Spacer. Allows the LS1 injectors or EV1 style to be used in LS3 intake. How does this look the rails higher than normal? Would it be better to go with the shorter LS3 style injectors? Stock 40#ers will not be enough for a 416 w/ projected 520 whp but supposedly my Ford 42s will be using the flow calculator?
Also does anyone make the short LS3 injectors w/ EV1 style plugs? I want it to look stock.
KAT-4751 MAP sensor harness, need that.
KAT-5185 MAP adapter harness,Delphi to Bosch. Must use LS3 MAP sensor?
90mm TB, ebay unit of course!
Thanks!
KAT-4750 Cam & Knock sensor adapter harness. Seen some pics online that the knock sensors to be relocated under the headers/manifolds by drilling & tapping the block in a certain spot?
KAT-A4674 Fuel Rail Spacer. Allows the LS1 injectors or EV1 style to be used in LS3 intake. How does this look the rails higher than normal? Would it be better to go with the shorter LS3 style injectors? Stock 40#ers will not be enough for a 416 w/ projected 520 whp but supposedly my Ford 42s will be using the flow calculator?
Also does anyone make the short LS3 injectors w/ EV1 style plugs? I want it to look stock.
KAT-4751 MAP sensor harness, need that.
KAT-5185 MAP adapter harness,Delphi to Bosch. Must use LS3 MAP sensor?
90mm TB, ebay unit of course!
Thanks!
04-26-2015, 10:46 AM
#2
Not sure if they make short ls3 style with the EV1 connector and I haven't used the spacers before. When I did my swap I cut off the old fuel injector connectors and switched it to the LS3 style like this. http://www.lingenfelter.com/mm5/merc...egory_Code=C77 I also used the stock LS3 injectors. On my stock starter I had to cut the stud hanging off the end so it would clear the knock sensor. Don't forget the throttle cable bracket too. Also I used my stock LS1 map make sure when you order your adapter harness that it has the right plug end for the map sensor your using.
04-26-2015, 08:15 PM
#3
Not sure if they make short ls3 style with the EV1 connector and I haven't used the spacers before. When I did my swap I cut off the old fuel injector connectors and switched it to the LS3 style like this. http://www.lingenfelter.com/mm5/merc...egory_Code=C77 I also used the stock LS3 injectors. On my stock starter I had to cut the stud hanging off the end so it would clear the knock sensor. Don't forget the throttle cable bracket too. Also I used my stock LS1 map make sure when you order your adapter harness that it has the right plug end for the map sensor your using.
04-30-2015, 09:13 PM
#4
I actually did find short EV1 style injectors. Stock LS3 injectors will work for stock stroke, not quite enough for a 416. Think I'll order the rail spacers for my 42s to get it running. Know about the throttle cable bracket. So the LS1 MAP plugs right in to the intake? Thanks for the tips!
04-30-2015, 09:28 PM
#5
I know the LS3 injectors won't be enough for your setup. To use the LS1 map sensor you'll have to remove the Orange grommet and install a small section of rubber hose on the map sensor. I used exhaust silicone to seal it to the manifold and haven't had any issues (that silicone works awesome btw). Maybe someday I'll re-do it and make a bracket to hold the sensor in.
