Wirings LS1 / LS2 coils
Posted: Fri Jul 03, 2009 12:51 pm
Hi. Since usage of LS1/LS2 type coils probably isn't specific to any one EMS product I'll go with General section.
Information on http*//www.megamanual.com/seq/coils.htm says adding two capacitors for each of these coils to provide "brief energy storage" and to "eliminate back-fed noise" is recommended. I assume caps should be close to coils itself and not just placed where they're easiest to install? This would probably mean soldering them to wires near coil connectors and covering caps with heatshrink tube. Mounting capacitors with wiring straight to connectors would be closest, but after passing extra pins thru same water seals as wiring it wouldn't be properly sealed anymore. They would also be vulnerable to mechanical stress when connectors are removed from coils.
My setup is going to be wasted spark V8 at this time, but I'd still prefer running separate signal wires for each cylinder to avoid rewiring needs in future. Above page says signal ground should be wired to EMS. Can I combine these grounds on engine side and then bring to EMS or do I really need to have separate signal+ground run for each coil? Installing 16 separate wires from engine compartment to computer just for coils is something I'd like to avoid.
I'm also, perhaps incorrectly, assuming that it's ok to split signal wires near coils because this engine has dual sparkplugs per cylinder so I have 16 of these coils. If splitting is not ok then in worst case it would mean 32 wires to computer and that would be quite challenging to route nicely and require some huge bulkhead connectors on firewall.
My final question at this time is about providing power and related ground to coils. Assuming wire used is not too thin can I combine these to fewer wires to avoid running 16 separate power and 16 ground wires?
Information on http*//www.megamanual.com/seq/coils.htm says adding two capacitors for each of these coils to provide "brief energy storage" and to "eliminate back-fed noise" is recommended. I assume caps should be close to coils itself and not just placed where they're easiest to install? This would probably mean soldering them to wires near coil connectors and covering caps with heatshrink tube. Mounting capacitors with wiring straight to connectors would be closest, but after passing extra pins thru same water seals as wiring it wouldn't be properly sealed anymore. They would also be vulnerable to mechanical stress when connectors are removed from coils.
My setup is going to be wasted spark V8 at this time, but I'd still prefer running separate signal wires for each cylinder to avoid rewiring needs in future. Above page says signal ground should be wired to EMS. Can I combine these grounds on engine side and then bring to EMS or do I really need to have separate signal+ground run for each coil? Installing 16 separate wires from engine compartment to computer just for coils is something I'd like to avoid.
I'm also, perhaps incorrectly, assuming that it's ok to split signal wires near coils because this engine has dual sparkplugs per cylinder so I have 16 of these coils. If splitting is not ok then in worst case it would mean 32 wires to computer and that would be quite challenging to route nicely and require some huge bulkhead connectors on firewall.
My final question at this time is about providing power and related ground to coils. Assuming wire used is not too thin can I combine these to fewer wires to avoid running 16 separate power and 16 ground wires?