Thread: Ls1 coils onto your sr20

i did this for my rwd sr20, but im sure its still helpful for people with an ems.

this was too easy. i almost gave up on it because i couldnt find the right wiring diagrams for it. i found what i needed after 2 days of web searching just about every google link i could with the words, "ls1" "coilpacks" and "sr20det" in it. lol.

if anyone wants to do this conversion, its stupid easy.
get a 2nd big gray plug (the sr coil pack harness plug)



and using this diagram




wire the wires to the gm coils using this color code/wiring code for the ls1 coils



A, Black, Ground
B, Brown, Reference Low
C, Ignition Control, 1/Ppl 3/LtBlu 5/DkGrn 7/Red 2/RedWht 4/DkGrnWht 6/LtBluWht 8/PpplWht
D, Pink, Hot in run and start, Inj 2 15 amp

the wire colors in bold are the negative triggers you need for the big gray plug wires to go to.

dont forget to make a nice solid ground wire



once you have that done, go to your ignitor, and using the corresponding "e" and "i" pins - just wire the wires across the ignitor and delete the ignitor altogether.

i soldered and heat shrunk all wires, installed the coils (loosely for now, making the brackets for each individual coil tomorrow) and it fired right up. it idles silky smooth and throttle response is crisp and rolling into boost is just as smooth. cant wait to see how well they work on a hard pull.

if i missed anything, just ask and ill answer. its super easy to do and as far as i know, this is about as complete a thread youll need to get it done. without pics but oh well, its still easy to explain.

Thanks for the post! That should be helpful for whoever needs it next!

Can you post a couple pics and maybe we can make this a bit of a write up?

Brent

will do! ill take pics the first chance i get.

got them on my b14 with aem ems very straight forward install. love them i run bkr7e at the regular gap (.032 it seems) no blow out at any psi i have tried yet

Any chance you can share the aem ems ignition settings you used to make these work? We can couple that with the diagram and the pics that are coming and do a write up.

Sent from my SCH-I510 using Tapatalk 2

just took pics, but the wires that are actually soldered are heat shrunk and covered up - i did however get pics of the plugs and harness overall. im sorting through them and ill add them to the original post.

How did you mount them in the engine bay, and what spark plug wires are you using? (part num. or custom made)

Very cool, gotta get this sorted out for the masses.

Brent

right now, because im waiting on wires, im using the stock 8"ish gm wires and the coils are secured loosely to the top of the valve cover. i have them zip tied so they dont move, but theyre not permanently mounted.
i bought some 18 gauge steel from home depot that im going to mount the stock coil bracket to and then that will be mounted to the front of the valve cover. i am going this route to keep the coils out of the way and still be able to cool them with radiator air flow. i went looking for wires to custom make but its almost impossible the guy said at the parts store to get wires that have the lsx ends on them. so im going to take cody ace's suggestion and use custom made magnacor wires.