he owns the junk yards that have the coils or he owns shares in company that makes them or ??????????

 

The coils seem to be more advanced and able to process more primary current than the base LS1 coils. Being more advanced, they are more efficient than LS1 coils and produce a better spark than the LS1 coil using the same operating characteristics. The same LS1 stock coil voltage and dwell probably results in more spark quality.

The

 

I can grab a few next week from the boneyard if someone wants to dyno them.

 

Interesting read. Wonder how you can mount them so the FRC's still fit.

 

Chicago1

Im interested. My 02 ZO6 is down hard BUT,,,,,I just had my 06 Z51 coupe tuned and I want to get it re dyno tested.

I installed headers and a VARARAM a while back and it was running very rich. It only dynoed at 365 RWHP & 365 TQ. It was pig rich and had some serious engine knock.

Its tuned now and this will be a good opportunity to do a couple of runs with the stock LS2 coils and then back to back couple runs with the D585 coils. That will give me the opportunity to see if the D585 coils effect the tune.

How much do you think that they will cost? Can you get the mounting brackets and harnesses so that the swap will only take a few minutes?

Let me know.

Bill Curlee

 

In that case bone stock is the way to go.... NOTTTTTTTTT

 

I dont know if this matters to anyone else or not but i talked with Kevin over at LPE today and asked him if he had ever heard of this before. He said that they tried this before on the engine dyno back in like 2003. He said there was absolutely no gain.

Then i asked if they tuned the dwell once they installed the D585 "Truck coils" and he said they didnt but said that he would chime in with some later input on this topic. But he thought the 9 rwhp and 12 rwtq gain was pretty near impossible. Maybe 2-3 Rwhp/rwtq after tuning.

 

complete and total

 

im still gonna wait and see what Lingenfelter finds out but im leaning towards the B.S.

 

hmmmm... you never know. It seems too new to work so well. I was a believer till now lol. btw everybody if you ever see msd coils run the opposite way. I've been all over this coil thing for the last few days.

Also, closely pay attention to the fast cars in gmhightechperformance. They've got 8 and 9 sec 1/4 mile cars running on stock coils. I was thinking that the coils would be better and give a little more kick, but it is looking like a couple people happened to swap coils that were on their death bed anyway.

The bigger engines have bigger demands of electrical parts so it makes sense for them to use more powerful parts. More air and more fuel need more spark. Makes sense now.

But then you've got to consider head/cam packages. They get more air and fuel into the cylinders, but why not extra spark? or does the computer automatically compensate for it?

I'm confused now lol

I'll just spend my money on stuff that I know works lol thats safe

 

well heres what i had explained to me

say u have a stock coil capable of 25,000 volts. You change it out for a Accel unit for instatce that is 50,000 volts and is TWICE the size of your stock coil. You probly wont gain anything more than weight due to the rest of your ignition system being STOCK!
Even tho the Accel Unit has a Higher rating the coil is still only going to give the spark plug the same amount of spark as the stock unit. Until u upgrade the rest of the Ignition System via "Ignition Module, MSD-6AL, etc" (for those that dont know most drag racers run a MSD-6A ignition controler due to the capability of the control Making Multiple SPARK!!! which a bigger coil would be a great benefit"

 

The truck coils apparently are just wound a bit stouter, and/or are designed to saturate faster, providing more power output given an equal dwell time.
Without knowing the actual differences in secondary voltages, it's tough to say how else that is accomplished.


Comparing the stock dwell tables between the two vehicles, the truck runs slightly more dwell in the normally used 12-14v cells, but they're reasonably close, and radically modifying dwell time is not the answer.


2001 C5 LS1 dwell table:




2004 Silverado 5.3 dwell table:


(I did check a 6.0 LQ9 tune as well, it's dwell table is identical as this one).


Again, for a stock(ish) car, I too would skeptical of any substantial gains, unless the coils just compensated for another ignition weakness, like junk plugs/wires..
But on a tougher-to-fire FI or high compression setup, the truck coils could prove to be of benefit.


I should try this swap, as I happen to own both. Doubt my (all stock) truck would mind running on the LS1 coils.

 

[QUOTE=06x6spdGTO;1571749791]well heres what i had explained to me

say u have a stock coil capable of 25,000 volts. You change it out for a Accel unit for instatce that is 50,000 volts and is TWICE the size of your stock coil. You probly wont gain anything more than weight due to the rest of your ignition system being STOCK! The physical size of the coil means nothing when discussing the key ingredient in a coil: energy storage. The 25kV and 50kV ratings are just the insulation breakdown voltages between points inside the coil and on its terminals. It has nothing to do with the engine or the spark plugs. If you make the distance between terminals or wires twice as far, then the shortout/breakdown voltage will double.Even tho the Accel Unit has a Higher rating the coil is still only going to give the spark plug the same amount of spark as the stock unit. Unless you know the inductance,resistance, and dwell times, you're only guessing which system (stock or aftermarket) will give you more energy. Until u upgrade the rest of the Ignition System via "Ignition Module, MSD-6AL, etc" (for those that dont know most drag racers run a MSD-6A ignition controler due to the capability of the control Making Multiple SPARK!!! which a bigger coil would be a great benefit" As far as the sparkplug is concerned, a bigger coil doesn't mean anything.[/QUOTE]

You can get more energy just by swapping the coil. But, you could also get less if you choose wrong. Without knowing the coil specs (or having lab bench data available), it's just a guess.

 

Interesting.

 

My compliments and appreciation to Y2K for supplying actual data to this thread. It helps keep the discussion focused on facts, rather than old wives tales.
Again, my compliments.

 

the coil produces the minimum spark required to fire the cylinder


there is nothing wrong with LSX coil

 

The coil unloads whatever potential it has stored within it.

It does not know, nor care, what is in the cylinder.

 

cylinder pressure determines how much spark is needed

it's been 20 years since I graduated from auto-tech , but I'm sure that has not changed

short version , cylinder pressure changes the resistance of the gap

 

That basic premise is still correct today too. And you did word that correctly....how much spark is needed...not how much spark is delivered.


Take a 1" combination wrench, and lay it across your car's battery terminals briefly. It'll make a neat spark, and slowly get hot if you leave it there long enough.

Now find a 10000 amp 480v busbar feeder in a substation supplying power to a large building, and try the same thing.

Not only will the wrench no longer exist, but you will land far away from where you were originally standing, and likely burnt to a crisp too.

That is the difference between power required, and power delivered.

 

no more than required will be delivered
if you want more spark ,add an MSD or other multiple- spark box