Hey guys,

Does anyone know if they sell high output Coil On Plugs for our Solstice? It seems to me that it might help the performance of the Solstice from 6,000 to 7,000 rpms. I've noticed on my Solstice that somewhere around 6,500 rpms... the motor seems to lose it's steam. It just doesn't pull AS hard at 6,500 rpms as it does at 6,000 rpms. I know that in some of the other motors I've worked on, this can OFTEN be because the rpms are so high that the ignition coil cannot properly charge quickly and efficiently enough to supply the necessary power at the higher rpms. This was real apparent with the V6/60. I know that that's one of the reasons why GM and other car comapanies ended up going with the COP system. Be that as it may though, I suspect that the stock coil on each plug is probably something like only 15,000 to 20,000 volts. I'd like to replace it with something more like 40,000 volts like what you'd get from an Accel ignition system.

Any idea if this is available for our motor?


Thanks!

__________________
Todd,
People for the Ethical Treatment of Automobiles
@ http://www.PETACar.ORG
-------------------------------------------
2006 Pontiac Solstice (#1267)
- GM Cold Air Intake
- Clear Image Hi-Flow Cat
- Clear Image Shorty Header

2002 Ford Crown Victoria LX-P74
1987 Pontiac Fiero SE / V6 (3.2) 5-Speed
1981 EZ-GO XI875A "Miami Dolphins" Medical Cart
1973 Volkswagen Type-2 Transporter (1800cc)
1973 Oldsmobile Cutlass Supreme 455

The main reason the engine starts loosing a lot of power near the end of the rev band is because GM designed the ECU to start going into a very lean mode near the end. Better plugs wont help one bit if you don't get a retuned ECU as well.

__________________

Lean? Don't you mean rich? Going really lean would be dangerous... I'd expect that GM would make it overly rich so as not to harm the engine on high rpms.

I wasn't talking about plugs, I was referring to ignition coils. the COPs... Coil-On-Plug. I would just replace the COPs.. not the plugs themselves.

This wouldn't require a computer tune as the computer neither knows, nor cares specifically how much voltage is going through the cyl. It simply cares about when to fire it. A higher voltage COP would merely make it a bit more efficient. In many GM applications, the ignition coil tends to not have enough juice to properly support the higher rpms.

I had heard about GM tuning the top-end of the rpms a bit richer... this hotter spark would help that somewhat.

__________________
Todd,
People for the Ethical Treatment of Automobiles
@ http://www.PETACar.ORG
-------------------------------------------
2006 Pontiac Solstice (#1267)
- GM Cold Air Intake
- Clear Image Hi-Flow Cat
- Clear Image Shorty Header

2002 Ford Crown Victoria LX-P74
1987 Pontiac Fiero SE / V6 (3.2) 5-Speed
1981 EZ-GO XI875A "Miami Dolphins" Medical Cart
1973 Volkswagen Type-2 Transporter (1800cc)
1973 Oldsmobile Cutlass Supreme 455

stock GEN I COP can power 500hp, in the information for the GEN II 2.4L GM says they improve the performance of the COP design. So I'm not sure if it will make much difference.

http://www.year2032.com/ecotec.pdf

Also the COP parts are rated for upto 45kV, The ECU though generally keeps the voltage closer to 20kV-25kV.... if the ECU were retuned you could have more voltage on the stock parts. I will admit that 45kV is not reccommened for long periods, but you don't need that much spark for anything but WOT in the upper RPM band anyways.

You could try LS1 performance coils since it is also COP... I know MSD makes a kit for it, you might be able to find just the coils though.