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On a 98 Camaro that has 853's with centerbolt valve covers, ls1 coils and brand new MSD wires on it now. If I put the taller valve covers and truck coils on it will the plug wires work and what harness will I have to change, the main white plug? If so how will I do that?
I've never seen a 100% answer on whether the vette fuel rail covers can be made to fit over the truck coils or not. I actually have an LM7 with the coils in question going into my 54 Belair but want to tuck them under the vette covers. Doable or no way?
This is how, I put ls2 coils on my LS1 engine.. Using ls2, lsx Speedmaster aluminum coil brackets.. I like Ls2 coils better, than the truck, because I was picking up knock with the truck coils...
I know, you are supposed to tune them, 5ms dwell... But those coils scared the hell out of me, my knock gauge went crazy..
BTW, I just took the car out tonight with these new coils, my air inlets were 72 degrees, and I tell you what, my car never felt faster... No issues what so ever. Except sounded better, more responsive,and no knock issues.
These coils are 100 millamps, the truck coils are like 120 millamps. The stock ones, I took off, are 40 or so milla amps.. So...
I am very happy with the ls2 coils. And I am going to stick with them. And they look good too... The truck coils are ugly... Ha ha..
Paul, this is awesome. I was looking at doing the D585 upgrade for my car, but the D585 won't fit with the new Proform Cast Aluminum valve covers I'm doing.
BUT the D581s will fit, and I understand they are just as good.
So, if you want to run that setup, it's something like this:
GM D581 Ignition Coil #12558693
GM LS2 Ignition Coil Wire #12601824
Proform LS Ignition Coil Brackets #69521 for D581 Coils
13" Long Spark Plugs... MSD 39849 or FireCore50 PF-3007 both work
Just an FYI for all interested... I was trying to figure out what coils came on my 1999 LM7 so looked it up on a few different sites, and everything I found gives p/n #10457730 which are the D585s. The ones that came on it (stock) are most definitely not those, but my 2004 LM4 did come with them. Then I came across this on a site running a slightly different version of the catalog:
(DELPHI, ROUND COIL)(COIL STAMPED 19005218, FOR 1ST DES SEE 12558693) : CK1,2 5.3T(LM7),(2ND DES)
The image even shows the D585 style coil.
Here's what the same site shows when searching for 12558693:
I'm wondering if GM decided to supercede all applications running the "older"/1st design truck coils to the D585s?
Last edited by stmotorsports; 07-24-2015 at 01:05 PM.
Perhaps. When I was looking up the D581, I saw the superceded coil Part Number. But the D581 is the Mitsubishi coil and is almost as powerful as the D585. I believe the LS2 coils are internally the same but repackaged 1st Gen Truck coils? Either way, I need to make sure I get the actual D581 body to fit the Proform valve covers. Plus my stock coils have 145k miles on them. So I've been looking at swapping for about a year now.
Btw, when I looked up those two part numbers on GM Direct, the "D585" equivalent was $73 and the "D581" was $39...
a little confused, is the point of the truck coil harness for mounting purposes or is the ls1 harness not correct?
reason I ask is I have a stand alone harness and the coils are mounted elses where and there isnt a bulk harness, just individual connectors for each coil.
The factory ignition coil harnesses for the LS1/6 coils had their own plug and pin configuration.
All other engines had a different plug and pin configuration commonly called "LS2" although it was used on many engines. All vehicles that do NOT have an LS1 or LS6 engine have this LS2 style plug.
The engine harness has large plugs that the coil harnesses are plugged into, one on each side of the engine. Any coil harness, LS1/6 OR the later LS2 style will plug into these engine harness plugs.
If you have an aftermarket fuel injection harness, it may have hard wired coil plugs. IOW, they don't come from a large plug in the engine harness. If this is your case, whatever the coil plugs are for is what you're stuck using. The harness's instructions should tell you which coils are compatible.
I think I'll keep my boring stock brackets and 585 coils.
Is that mounted backwards? Notice how the plugs and the coils are not both facing the same direction? They should be. Then your plug wire won't be making an "S" shape.
I suppose if the coil plug was turned a bit counter-clockwise, it would look better. As these are LS1 ignition wires, they become a little long when the coils are moved down (outwards?) on the valve covers as was done here, to better clear the fuel stuff above it.
09-12-2014, 08:58 AM
