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2002 Z-28 swap to truck coils.

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Old 10-05-2009, 04:53 PM
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Default 2002 Z-28 swap to truck coils.

legitimate gains. Made a pull, swapped coils, made another pull.
Attached Thumbnails 2002 Z-28 swap to truck coils.-truck-coils.jpg  
Old 10-05-2009, 05:06 PM
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wow nice gain! which truck coils did you use?
Old 10-05-2009, 05:16 PM
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also how many miles were on the old coils
Old 10-05-2009, 05:37 PM
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im having a tough time reading that. 381/343 to 398/355.....correct?

if so, very impressive, and i think this would be thread #2 ive seen on this. might have to give her a shot.
Old 10-05-2009, 05:45 PM
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Wow. That is more than a decent gain. You are correct WSsick.

What coils did ya use?
Old 10-05-2009, 06:12 PM
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Originally Posted by RooRnZ28
wow nice gain! which truck coils did you use?
x2!

Other questions:
What is the current combo? Stock w/bolt-ons?
Were the ls1 coils old?
Do they bolt right up/ plug in?
Did you have to change the tune?
Did you see any spark knock after the swap?
Old 10-05-2009, 07:27 PM
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Thats wild that a coil swap (unless the old ones were bad) would make that much difference. Whats the difference in volts between the 2?
Old 10-05-2009, 07:53 PM
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Did you change the dwell on spark or leave it stock? Very interesting! Thanks for posting.
Old 10-05-2009, 08:02 PM
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Answers please lol
Old 10-06-2009, 12:16 AM
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Coils don't "wear out" or get weaker with time and/or use. They may go bad and stop working altogether but they either work or they don’t, there’s no in between. It’s an electrical component with no moving parts, nothing to wear out resulting in reduced performance.

A functioning old coil will perform exactly as it did when it was new.

The gains shown here are similar to what I had in a rough dyno run as well as what others's who've done the swap have said about driveability and performance "feel"
Old 10-06-2009, 03:38 AM
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put some ls1 coils on a truck and lets see some before and after please
Old 10-06-2009, 05:50 AM
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I'm sold... eerrrrr, I was sold, and currently have the truck coils.
Just watch this video:
http://video.google.com/videoplay?do...585+coil&hl=en#

He specifically spells out the difference in power that the truck coils deliver compaired to the ls1 coils. Fact is, when you start to bump up the compression and load on a motor, you will benefit from a stronger spark. Why do you think GM replaced the coils when the ls2 was introduced, and once again when the ls7 and ls9 were introduced. GM doesn't spend money switching things for no reason. Fact is, trucks experience very high loads on their engines when towing, and trying to push around 6,000+ lbs, so they needed a higher energy coil. GM saw the benefit, and integrated similar performing coils on the ls2, ls7, ls9.

This is the second dyno that proves they work.
Old 10-06-2009, 06:37 AM
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1-what years and engines can be used? 5.3 and 6.0? 2000-2006?
2-is it a direct fit and plug and play?
3-retune needed? or it will just give a stronger spark and that`s it?

thanks for sharing and waiting for the info thanks for that too if these questions are answered maybe more people will post results of this swap

{----watching
Old 10-06-2009, 07:10 AM
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Originally Posted by blueflamespl
Did you change the dwell on spark or leave it stock? Very interesting! Thanks for posting.
I would like to know this too cause if this is stock LS1 dwell, I wonder how much more gains could be made with the same dwell setting as the trucks use? THANKS Jeff!
Old 10-06-2009, 07:23 AM
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Originally Posted by blueflamespl
Did you change the dwell on spark or leave it stock? Very interesting! Thanks for posting.

nothing was changed. just swapped the coils.


to answer a few other questions.....

Its basically a plug and play swap. There was some minor drilling needed on the truck coil bracket to make it fit....but very minor.

No retune was needed.

I do not know what year truck coils they were. The customer brought them in with him. We did not provide them.

The car is a stock cube, bolt on car with a cam, long tubes, FAST 90 intake, 90mm TB, 243 heads with mild port work, A4, stall, 9 inch.
Old 10-06-2009, 07:32 AM
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still uses ls1 plug wires right?
Old 10-06-2009, 07:42 AM
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Originally Posted by streetassasin
still uses ls1 plug wires right?

yep. same wires.
Old 10-06-2009, 09:20 AM
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I installed the D585 truck coils on my Procharged '02 Z28 nearly 3 months ago after seeing Megasquirt's comparison and analysis and joining Paul Bell's thread on the subject. That was enough for me to pull the trigger, but this just reinforces it.

Old 10-06-2009, 09:23 AM
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I might ha to give this a shot, I currently have the square truck coils but might be able to find a set of the round ones with the heat sink...then I'll have to finally get fuel rail covers though cause those round coils are ugly as sin in comparison
Old 10-06-2009, 10:00 AM
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thanks for answering MR. Jeff

can anyone help with what years coils that will bolt right up just like the one in the first post? 2000 - 2006 all the same?

Junk Yard Wait For Me


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