allngn_c5

iTrader: (3)

I'd like to know this too. I enquired about doing this on my car to eek out a few more rw hp/tq and was told its more trouble then its worth and sometimes even after tuning for the new duell times the gains just don't materialize.

Thanks for the back to back comparison man. GOod job !

NateLS1

iTrader: (4)

I got mine today for $125. so if I get 10rwhp, thats $12.50 / hp. not bad. junk yard is the way to go

99'CajunFirehawk157

iTrader: (57)

More LSX coil info here http://www.megamanual.com/seq/coils.htm

sixpack_2_go

iTrader: (1)

this is interesting. how come there aren't more threads on this???

The Alchemist

iTrader: (19)

I'm not sure I agree with the "it's more trouble than it's worth" attitude, considering it took me about 10 minutes and $130 to do the swap. I guess it was more trouble than an intake lid swap, but certainly not troublesome. Sounds to me like someone just wanted to get you out the door Doug.

Let's face it guys, to make combustion, you need three things, oxygen, fuel and spark. We increase the oxygen supply by changing cams, heads, headers, intake manifolds, and even spraying nitrous oxide. We then bump up the amount of fuel through tuning, even going to bigger injectors, or in extreme cases, upgrading the entire fuel supply. But what about spark?

You don't think there is a gain to be made by increasing the spark?

Let me ask you this, what lights a grill quicker, a little bic lighter, or a blow torch? I'm no expert, but if you increase the intake charge of fuel and air, you've now packed the cylinder with a lot more fuel and air, so you need a stronger, better spark to light it off. You have to remember that at WOT, the timing of combustion is incredibly quick, so the difference in milliseconds of a weaker vs stronger ignition source most certainly could acheive more power. If not, why do we change plugs? Why don't we just leave the factory platinums in till 100,000 miles?

green28

iTrader: (8)

I've checked on the Delphi website and tried searching AC Delco's site with some part numbers for the coils but can't seem to find anything on their sites. Just wanted to see what they were listed for on there, since I have a connection at Delphi I was going to see if he could get a discount on them.

bballr4567

iTrader: (5)

Exactly. Why cant more/better/powerful spark give you more power? If you think about it the truck engines are constantly being worked harder than the LS1 just because it has to pull around 2X the weight. Add in a trailer and payload and you are really working that engine.

Makes total sense to me that this makes power.

john563

iTrader: (17)

how much for a set of these new? I may try it

synner

if a JY doesent have any available do you think the same gains would be acheived with the MSD coils

Paul Bell

iTrader: (9)

NO. The MSD coils have shown no improvement over stock coils and go bad often and are expensive. It's been chatted to death here...

7camaro7

iTrader: (15)

why not? their mA is even higher than the d585s.

Paul Bell

iTrader: (9)

Why do they not show any improvement? Nobody has been able to determine this. Regardless, they go bad often so it's not really a wise investment.

7camaro7

iTrader: (15)

no one has improvements?

The Alchemist

iTrader: (19)

I remember reading that the problem with the MSD's is that they can handle the stock dwell time in the ls cars, so by being overcharged constantly, the msd's actually burn out and fail. The benefit here with the D585 coils is that they can handle more dwell time, and release more current than the stock ls1s.

Paul Bell

iTrader: (9)

I would be willing to bet my left, err, hand that GM engineering spent considerably more time and money on their coils than MSD did.

7camaro7

iTrader: (15)

I'll take you're word on it, I almost pulled the trigger on some msds. I have to say i only know of 1 person using them. And his cammed 6.0 runs like *** lol not that much faster than my car with the stock 5.7.

check this out on corvetteforum.com

http://forums.corvetteforum.com/1571749649-post27.html

The Alchemist

iTrader: (19)

Well, again, back to back dyno, with solid gains, and both posters have nothing to gain from doing the test. What more do you want?

bballr4567

iTrader: (5)

I dont get why people keep saying its impossible to have this happen. A far better spark will help make more power. Same reason we change the spark plugs when they get miles, they loose the ability to make that spark.

JFM-jr

iTrader: (23)

It's official i'm sold on this mod. Let the phone calls begin . . . . . Paul Thanks for sharing this in the other thread i'm the 1st to admit I had my doubts but it's obvious the results are SOLID.

jmilz28

iTrader: (13)

Anyone know how these compare to LS3 coils? I am doing an LS3 swap soon and would like to get the truck coils if they are different. Thanks!

BTW, to doubters: This is a NO BRAINER. If changing plugs, helps, this is obvious. If you improve what the spark passes through, you'll get even more benefit from an improvement in the part that actually generates the spark!