Johns00Z28

iTrader: (6)

Anyone using a bigger amp alternator in conjunction w/ the coil swap?

MikeG

iTrader: (33)

Got my swap all done a couple days ago. The driver's side is spaced down using the washer trick that was shown earlier in this thread. The passenger side is mounted in the normal fashion. Not a fan of how it looks, but I'll live with it until I can make up some spacers like TWS used. As far as performance goes, the car definitely accelerates more smoothly now. I also changed out my 10k mile old TR55's gapped at .050 for some TR5's gapped at .040 at the same time, so that may have helped some. I'll see how it does at the track now before I sell my old coils.

sinful7

iTrader: (1)

sorry to raise this from the dead.. but are you able to keep the corvette fuel rail covers when you install the truck coils anyone know? or are the coils too tall?

TWS

iTrader: (63)

I just dyno'd my 2002 Z28. The pewter one pictured earlier in this thread. Can't say what gain if any the coils gave me as I did several mods resulting in the need to go back to the dyno and retune. HOWEVER, the car put down strong numbers. 542 RWHP/488 RWTQ SAE corrected. Observed (STD) was 556 RWHP and 501 RWTQ.

Can't say how much the coils helped, but I certainly don't think they hurt in the slightest. These numbers were achieved with a bone stock LS1 with a D1SC @ 10psi. Twin 4.5" intercoolers, FLP longtubes/ORY and magnaflow w/Spintech muffler. Oh... and I have a BBK TB FWIW haha. Car is an M6 with Moser 12 bolt out back. Ran out of injector at 5300 RPM. The 42# green tops couldn't keep up. Buying some Siemens Deka 60# injectors and going back.

Previous dyno was 479 RWHP. Same head unit but 8 psi and the smaller 3.5" procharger intercoolers. I upgraded the intercoolers, the pullies, larger K&N cone filter and better bypass valve (if that matters) and installed the D585 truck coils since that dyno years ago.

Paul Bell

iTrader: (9)

WOOF! 542 RWHP! I'm glad you're far, far away.

jimmyducati

iTrader: (3)

can these coils be relocated in the same fashion that is common with the LS1 coils? Wouldn't that take care of any clearance issues that came about?

Paul Bell

iTrader: (9)

Long story short, no. They mount differently to the brackets therefore the brackets are different.

I'm certain that you could re-locate the coils to the fenders or cowel just like regular LS1 coils. There's kits to do it.

99blancoSS

iTrader: (115)

Yes they can I offer a kit to do it

http://estore.websitepros.com/212053...s+and+brackets

Monte4ever

iTrader: (2)

I just read this whole thead and did not see any comparisons between the LS2 heat sink coils and the LS2 coils without the sinks. Do yal think it would be much of a difference between the two?

Paul Bell

iTrader: (9)

A comparison was done on the Megasquirt site. The heat sinked coils did better.

Yes, there is a differance.

some_punk

so does GM still make this part with the heat sink or is it discontinued?

DrededSS

iTrader: (4)

P/N 10457730

But if you're in the junkyard, you'll be looking for P/N 19005218

I would search the junkyards first, it will be much cheaper. Picked up my set from the junkyard today. Had to spend some time cleaning them up, but I got 8 coils, 3 brackets and 3 harnesses all for $72. I'll be installing them soon with NastyPerformance billet valve covers. We'll see if the coils plus my airbox mods can get me up over my previous 509 rwhp.

tdevil55

iTrader: (23)

I finally did this swap just the other day. I used the stock mounting points to get the coils on, just had to move the air and wires out of the way to get to everything. Didn't choose to bend the fuel connect, decided to move that one coil itself down on the bracket instead. Self drilling screws ftw. Still have stock wires on, they are tight between the coils and plugs, but worked fine. Ill look for better wires soon.

I have a dyno planned for this weekend that will give me 3 pulls, but not too sure if they will allow me to swap the coils. Weather is threatening to postpone the dyno(snow), but they will offer makeup days. I will do my best to convince them to let me do the swap and take down the numbers. As far as my "feel" of the swap, can't really tell if I am feeling the difference. With any change to a small hp setup on your car, your brain will tell you that there is a change, and the anticipation will make you "feel" the difference. Take descreening your maf or cutting the intake box for the free air mod, can you feel a difference to doing that, some say yes, others say no. So, I cannot say I feel a actual difference, but the want to feel a difference may make me feel something. Either way, the scientific results have been posted in this thread, but the dyno numbers have been slim, so I am hoping I can add to those.

99'CajunFirehawk157

iTrader: (57)

Along the same lines, I have a set of 8ea ACCEL p/n 140040 coils I bought, installed and ran for about an hour in my garage just to test and then found out the truck coils won't work with standard fuel rail covers unless you relocate the coils else where, like new, all 8 for $200 plus usps shipping.
Cheapest price on eBay was $52 EACH!
More info direct from Accel's webiste:
"LS1 TRUCK SUPER COIL

• 10-15% more energy than the OEM coils
• 140040 is a Delco style replacement unit for the Delphi System

These coils feature advanced bobbin technology, highly specialized silicone magnetic steel cores, along with optimized winding, resistance and turns ratios to deliver 10-15% more energy than the OEM coils. Specialized high temperature epoxy resists shock and vibration, while increasing thermal conductivity. These are direct plug-in replacement coils for LS1 based engines in GM truck applications. They feature bodies, brackets and towers molded in ACCEL yellow, as well as brass secondary contacts. Fits: 2006-1999 1/2 and 1 ton GM chassis with 6.0L Engine codes "N" and "U" ; 2006-2001 1/2 ton GM chassis with 5.3L Engine codes "T" and "Z"; 2000-1999 1/2 and 3/4 ton GM chassis with 5.3L Engine codes "T"; 2006-1999 1/2 and 3/4 ton GM chassis with 4.8L Engine codes "V". Note: Be sure to check your stock coils on your truck or van to make sure they physically match our new Super coils. GM offered several styles of LS1 coils that are not all compatible with each other. The ACCEL P/N 140040 is a Delco style unit for the Delphi System
Model Number: 140040"

PM to discuss. PAYPAL w/no additional fee!

edzsilverss

iTrader: (4)

All these pages for 9 hp? is it really worth it in the long run. After adding everything up to do it right, it's kind of expensive for 9 hp is it not? I'd like to see the original poster put in a brand new set of regular ls1 coils on there and see what it would put down on the same dyno. Why not take out the spare tire and jack. Same results at the track lol. BTW, anyway to test coils to see if they are working good? What if he had a bad one to begin with?

VIPRETR2

iTrader: (63)

That's really up to the end user. When you get to the point of diminishing returns being able to pick up ANY horsepower with an easy mod is a no brainer. Someone like you has a way to go before you start scratching at the wall. You can pick up easy na hp from an intake, TB, better headers, etc. Some of us have all that crap already but we still need more. Plus, I've seen D585 coils and brackets go for as low as $125. That's a cheap 9rwhp if you ask me. Hell, I bought a set for the stronger spark when I eventually put on the juice, if I gain na hp it's just icing on the cake.

Larry

edzsilverss

iTrader: (4)

I've seen D585 coils and brackets go for as low as $125

Is that for both sides? That would be a good deal and worth it.

SIC LSX

iTrader: (10)

Ive seen 290whp to 320whp stock! i think his is low due to so many miles and the only reason you gain so much was you went from 155k miles to some better truck coils that im sure had less miles.

SIC LSX

iTrader: (10)

procharger has a promod with stock truck coils on it. They said they test eveycoil out and they were the best

Johns00Z28

iTrader: (6)

I gained zero on a back to back dyno comparison. I'm cam only w/ a tad under 70k miles.