BURL

I searched the forum and found almost nothing and on the Web I find conflicting info. I'm supercharging full bolt-ons and think a hotter spark would be good. I know some will say the stock LS1 coils are fine but that's not my question.

I understand from reading that some of the truck coils had substantially hotter spark. so far I've found several references to the AC-Delc 585 as being hotter. But, several people made OEM coils for GM so what I really need is a list of donor vehicles with hotter coils and even better a list of the GM part numbers for the hotter coils. I see lots of packs for sale on the Web but they are normally listed by the GM part number so I don't know if they are the better coils or not with out a reference list.

Does anyone in here have the accurate skinny on which coils I should be looking for?

Thanks in advance.

ss4luck

Aren't the round truck could the ones all the "heavy hitters" try to get their hands on?

BURL

Don't know - that's what I'm asking.

Rkreigh

How much HP are you targeting?

the truck coils are probably the best of the stockers.

Stockers should be good to around 1k hp or possibly a bit more.

I have seen some aftermarket companies (dynaspark I believe) that also make hotter coils but they are pretty pricey as I recall over 600 a set

If you would like a set of truck coils to try *work very well* I have a set for 150 shipped.

PM me if interested.

BURL

I appreciate your post but here is what I asked - "I understand from reading that some of the truck coils had substantially hotter spark. so far I've found several references to the AC-Delc 585 as being hotter. But, several people made OEM coils for GM so what I really need is a list of donor vehicles with hotter coils and even better a list of the GM part numbers for the hotter coils. I see lots of packs for sale on the Web but they are normally listed by the GM part number so I don't know if they are the better coils or not with out a reference list.

Does anyone in here have the accurate skinny on which coils I should be looking for?

Thanks

stevieturbo

You should be looking for better coils when your current ones show a problem.

And you already have the D585 number....if you cant find the coils with that, just stick with what you have, because it seems they're working fine.

And asking for "better" is a very relative term. Better than what.....?

I dont see the 585's being any better than the 514, 510 etc etc etc in the real world despite some claims.

And until you're over 4 figures...pretty much any stock coil is more than adequate.

BURL

Stevie, you've replied to other posts I have made and you always seem to be able to muddy the waters. I did not ask about semantics of the word "better". I didn't ask what you see as working better (although hotter spark under pressure = better combustion and enable wider spark gap to ignite better - simple concept that's been around for years and years). And didn't ask for you to "talk down to me" about not being able to find the coils. Not sure of you history but I've got about 40 years of Chevy hot rodding under my belt.

Some people are a " legend in there own mind" and have to try to convince others of that fact. I ask honest questions seeking honest answers not pompous responses.

Not trying to be an a$$ but as I said you've done this in my posts on several occasions. Please reread my post and see if you can ferret out what I'm asking. It's fairly simple. SUMMARY: SOME TRUCKS have hotter coils. I am looking for DONAR TRUCK LIST OF HOT COILS or GM PART numbers for the HOTTER COILS.

If you can't contribute to those specific questions then why bother to post?

TastyBacon

BURL, Stevie is extremely experienced and knowledgeable. He is giving you good advice, even if it's not exactly what you wanted to hear.

In order to save other members from your insults, here's some of the information you're looking for, and here's how I found it. I took the AC Delco part number you already know, D585. I went to RockAuto.com and typed it in the part number search, which gave me a list of every vehicle that part was used on:

As for which OEM coil delivers the most spark energy, as you've found, there's a lot of debate. The hot rodding community is heavy on anecdotal evidence and hearsay and light on guys who sit down with an oscilloscope and test a pile of coils. So in this case, unless you intend to be that guy, pay that guy, or find the guy at GM with all the specs, you may never know exactly what you want to know. If you want to use OEM coils, you can either make the simplest, cheapest, most practical choice and stick with your stock coils, since they work well for a lot of people, or pick up a set of different OEM coils, like D585s, which also work well for a lot of people. If you need something that comes with a datasheet, there are aftermarket coils like the IGN-1A. Unless you are really pushing the envelope, I doubt you'll notice a difference in performance between any of those options.

BURL

I've been on this forum for a couple of years ow and have not replied to anyone the way I did to Stevie. I've spent most of my working life as an engineer with part of that ias an engineer in automotive. I have very valid reasons for wanting hotter coils and don't want to burn a lot of words trying to explain all the details Maybe my post appeared as if I'm an engine newbie. But even at that extremely general/vague comments would not help a newbie.

I wasn't just trying to insult but I've had this happen with Stevie several times. If this had happened just once you would never have heard from me. Please, objectively, re-read what I asked in my post and then read how he replied. How did he help me in any way? I'm going to leave it at that.

Now thank you for your information. That list is exactly the type of info I needed. It would also be nice to have the GM part numbers because sometimes you will be looking at a vehicle for parts and not know the exact model/year. But the list is half the battle and it certainly helps. Thanks

Vetteman Jack

Thread closed at OP's request.