Another successful LS1 coil swap

Post by **240z4u** » Fri Jul 03, 2009 5:16 am

Piece of cake, rb25det S2 motor so I didn't have to play with ignitor wiring. I cut up an old coil harness that I had so this deal is plug n' play. I used the coil diagrams from whatsadsm and darius warned me to reset the timing when I was done.

Car fired right off. I am pleased.

No, I won't provide you with wiring diagrams. I am too lazy and didn't take notes. Whatsadsm pretty much covers it anyway. Just note which wire color goes to which injector clip.

Evan

BTW, I have been told they are actually LS6 coils FWIW.
Modified by 240z4u at 1:09 PM 7/3/2009

Post by **Neejay** » Fri Jul 03, 2009 5:47 am

Clean swap/job!

Did you encounter ANY problems?

Post by **240z4u** » Fri Jul 03, 2009 5:56 am

Thanks, quite honestly dealing with the mounting and construction of the coils was the most time intensive part.

Post by **HxC_Nismo** » Fri Jul 03, 2009 8:48 am

very nice, does the ls2 coils hold up pretty good on the rb? since they originally came from a naturally aspirated engine.

Post by **240z4u** » Fri Jul 03, 2009 8:58 am

From what I have read, the LS2 coils are easily some of the best coils you can get. People put them on damn near everything, including turbo cars. Spark energy is VERY high.

Whatsadasm did a much better writeup that can be seen here; zerothread?id=353832

Evan

Post by **HxC_Nismo** » Fri Jul 03, 2009 9:09 am

cool man, i would do the swap but i already upgraded my coils to the splitfire coils.

Post by **maryjane** » Fri Jul 03, 2009 10:05 am

nice!

Post by **rb25drag** » Fri Jul 03, 2009 6:07 pm

Clean Swap, Yeah your coils are a different style than mine. I have the ls2 truck coils. They have an aluminum heat shield on them. Those are some of the best coils on the market.

The Nascar tech from Roush Racing is who set mine up. He has a rx-7 with a turbo 2300 series mustang motor in it and he pushes over 25psi with the same ls2 coils and never has any ignition problems. They will fire damn near anything lol Plus the idle on my car has never been smoother. Its nice knowing your ignition system is strong. I believe Darius also has recently went with a ls coil swap.

Post by **240z4u** » Sat Jul 04, 2009 6:20 am

Yeah you have the LS2 coils , mine are the LS1/LS6 coils. I tried to edit the title but no dice.

Thanks.

Post by **robbie2883** » Sat Jul 04, 2009 8:50 am

i have a set of ls1 coils sitting around i was thinking about doing this with. i have splitfires but i am having issues getting them to work with my j&s safeguard. i know it'll work with the lsx coils. anyway nice setup bro. looks good, only thing from keeping me doing it is the looks! lol

Post by **Yellow4g63** » Sat Jul 04, 2009 9:25 am

240z4u wrote:No, I won't provide you with wiring diagrams. I am too lazy and didn't take notes. Whatsadsm pretty much covers it anyway. Just note which wire color goes to which injector clip.

Evan Modified by 240z4u at 1:09 PM 7/3/2009

LoL so mean.

Post by **PorkChopExpress** » Sat Jul 04, 2009 9:53 am

i like how this bypasses the ignitor. one less thing to go wrong .

Post by **Darius** » Sat Jul 04, 2009 5:38 pm

FYI there is no ignitor to bypass on the S2. The LS coils have the ignitors built in too. I should just post up a couple of extra pics in whatsadsm's thread to clarify the wiring since it seems like there are a lot of guys posting up coil pack issues lately...I suppose the reasonable life expectancy of those things is only 15-17 years

Post by **WhatsADSM** » Sat Jul 04, 2009 6:36 pm

Wow, that is clean, makes my swap look like fisher price! Great to hear that you got everything up and running. Did you make sure to set the dwell degrees in the PFC?

Post by **240z4u** » Sat Jul 04, 2009 7:56 pm

Thanks guys, playing with the dwell is next on the list. I haven't even driven my car since I got it all hooked up. Just went around the block to make sure all was well.

Whatsadsm, your whole swap makes mine look like fisher price LOL.

Evan

Mods, thanks for fixing the title.

Post by **mattblancarte** » Sun Jul 05, 2009 12:44 pm

240z4u wrote:I haven't even driven my car since I got it all hooked up. Just went around the block to make sure all was well.

Gotta love it. I haven't had a chance to drive mine either since all my latest mods have been done.

The swap looks super clean Well done.

Post by **l0nestar** » Sun Jul 05, 2009 12:56 pm

So I was right about the timing? Cool!

Swap looks clean man. I think it's on the list..

Post by **240z4u** » Sun Jul 05, 2009 1:53 pm

l0nestar wrote:So I was right about the timing? Cool!

Swap looks clean man. I think it's on the list..

$HIT list?

Website · Post by **meet07** » Mon Jul 06, 2009 11:35 am

So what happens if you dont turn down the dwell??? Im assuming you get to much spark but what are the side effects??

Post by **240z4u** » Mon Jul 06, 2009 11:36 am

What do you mean by turn down the dwell? It is going to get turned up!

Post by **Carl H** » Mon Jul 06, 2009 11:48 am

yay lightning bolts in your engine...do post impressions from driving and increased dwell time.curious to find out if the car will get better gas mileage now.

Post by **240z4u** » Mon Jul 06, 2009 11:50 am

Carl, my tune is totally trashed because I did a bunch of modifications at once. I have decided to "start over"..

I can tell you though, my tune right now is fat and even before increasing dwell it is running smoother. I had forgotten I did the swap last week and on the way to work I actually wondered why it was running so much better.

Looks like 5-6ms of dwell is the max you really want to use. I am going to stick a new set of plugs in as well I think.

Evan

Post by **WhatsADSM** » Mon Jul 06, 2009 11:59 am

meet07 wrote:So what happens if you dont turn down the dwell??? Im assuming you get to much spark but what are the side effects??

240z4u wrote:What do you mean by turn down the dwell? It is going to get turned up!

Yup, 240z4u has it right. The LSx coils are pretty big and strong and work best with a lot of dwell. So if you don't have a way to increase the dwell versus the stock dwell then they aren't running near their full potential.

BTW there was some question as to the strength of the spark, and what I will say is that I had working R33 RB26 coils before and had to have my gap down to like .020-.025 on 18psi to guarantee no spark blow out. Once I did my conversion to LS2 coils I was curious to see so I actually put in my plugs at .040 gap and still never had any blowout at 22psi that I ran all last year... Hell I don't even have the dwell all the way up and I didn't even change the plugs for a full year and didn't get any blow out until I experienced some minor blowout this year when I turned it up to 24psi on an E85 mix! All I did was put in new plugs and left the .35 gap they came with and good as new... So they are WAY stronger than the stockers/splitfires.

The LS2s are stronger than the LS1s so I am not sure how they will hold up, but I would guess even the LS1s are also stronger than the stock stuff by a considerable margin.

As for gas mileage... I'll be honest I didn't see anything measureable... As for power the car felt smoother and maybe a *little* more powerful, but I never did any before/after dynoing so I am not sure. Nothing more than a "butt dyno". I did it primarily to ensure that I could turn up the boost without worries of spark blowout and having to run crazy low gap.
Modified by WhatsADSM at 10:45 PM 7/6/2009

Post by **Darius** » Mon Jul 06, 2009 12:13 pm

I calculated the dwell in mS of the stock PFC settings and the peak was 2.7mS at 1000 rpms and down to about 1mS at peak rpms. Weak sauce!

I am going to creep mine up 50% to 4.0mS down low and about 1.5mS up top, while maintaining the same relative difference that came with the PFC.

Carl - No joke about the lightning bolts. When I was testing spark on mine, it was literally shooting 1/2" long bolts across the valve covers. Scared the crap out of me because I was so used to seeing little sparks in the plugs themselves.

Post by **Carl H** » Mon Jul 06, 2009 1:39 pm

how are you calculating dwell time thru the pfc...i'd love to tweak mine on the stock ems but not sure how to go about it...rather how much to increase it.

Post by **stevespeed** » Mon Jul 06, 2009 1:58 pm

Awesome Job Evan!

Post by **240z4u** » Mon Jul 06, 2009 2:08 pm

Matt, how are you figuring out what the dwell actually is? I am in my car right now looking at the dwell numbers and they just seem like arbitrary numbers. I have no idea what the scenario is.

These coils work much better, I was so rich I had black smoke POURING out the tail pipe and the engine still felt smooth.

Evan

Post by **robbie2883** » Mon Jul 06, 2009 2:15 pm

stevespeed wrote:Awesome Job Evan!

+1, from my understanding the pfc calculates dwell in angle instead of time?
Modified by robbie2883 at 5:44 PM 7/6/2009

Post by **rb25det250sx** » Mon Jul 06, 2009 2:19 pm

what in the hell is dwell?

Post by **robbie2883** » Mon Jul 06, 2009 2:25 pm

rb25det250sx wrote:what in the hell is dwell?

dwell is the time the ecu allows the coil to charge before it is fired

Another successful LS1 coil swap

Another successful LS coil swap

Re: Another successful LS2 coil swap (240z4u)

Re: Another successful LS2 coil swap (Neejay)

Re: Another successful LS2 coil swap (240z4u)

Re: Another successful LS2 coil swap (HxC_Nismo)

Re: Another successful LS2 coil swap (240z4u)

Re: Another successful LS2 coil swap (HxC_Nismo)

Re: Another successful LS2 coil swap (maryjane)

Re: Another successful LS2 coil swap (rb25drag)

Re: Another successful LS2 coil swap (240z4u)

Re: Another successful LS coil swap (240z4u)

Re: Another successful LS coil swap (Yellow4g63)

Re: Another successful LS coil swap (PorkChopExpress)

Re: (WhatsADSM)

Re: (240z4u)

Re: (l0nestar)

Re: (meet07)

Re: (Carl H)

Re: (240z4u)

Re: (WhatsADSM)

Re: (stevespeed)

Re: (stevespeed)

Re: (240z4u)

Re: (rb25det250sx)

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