broncobuyer

need to do a 100k tuneup on the gxp and was wondering what kind of plug wires i should use?

AlabamaGuy

iTrader: (5)

Just keep the factory unless they're bad. Other than that you might could try GMPP wires, I think they came on the LS2 cars.

broncobuyer

seen some taylor 8mm race wires on summitracing, these any good? i would rather replace the wires just in case one breaks when removing them.

AlabamaGuy

iTrader: (5)

No. I've seen dyno results where cars lost power going to an aftermarket wire.

Just be easy on the boots and you should be fine.

2005gxp

what coils are you using?

broncobuyer

stock coils, was just looking for ways to increase fuel milage a little bit. wife has new job and drives over 100 miles a day in it. 23mpg aint gonna cut it anymore, any ideas?

Mels SS

iTrader: (1)

MSD Plug Wires.

AlabamaGuy

iTrader: (5)

Saw a 7 horse loss over factory on a friend's car. The real advantage is that you can bend the boots to move them away from headers.


I'm using truck coils, if that question was directed at me.

Mels SS

iTrader: (1)

Same plug wires that's on the Vette's

AlabamaGuy

iTrader: (5)

You sure they have MSD factory? I thought they had GM Perf.

Mels SS

iTrader: (1)

A friend of mine is a mechanic at the chevy dealership and he got them for me at his cost

AlabamaGuy

iTrader: (5)

I'm not saying you're wrong, I just don't see why MSD would sell their wires as an upgrade for something that came factory. I know the factory wires are red, but this is the first I've heard of them being MSD.

2005gxp

truck coils or msd coils? which would be better?

AlabamaGuy

iTrader: (5)

If you MUST upgrade, Truck coils. I don't even think those are worth the money though. I didn't have a SOTP difference and there have been a few threads as of late disproving them. But then again, there have been threads proving them.

I've heard nothing but bad out of the MSDs. Including reliability problems to go along with power output. GM actually did a very good job with the LSx ignition.

Count of Monte Carlo

I ran those for a while, traded the car with them on. Other than having to tie up the passenger side rear 2, they worked well. I dont like to keep plug wires in for a very long time, did my tune up at 70k. The idle was starting to get a hair coarse. The DOD plugs had quite a bit of deposits on them compared to the non DOD plugs, which this all goes without saying.

D J Real

iTrader: (2)

ya I agree with what everyone has said that stock ignition hardware is good stuff. I know the GM official policy is that the ls4 is a low maintenance engine and the ignition should be fine till 100k, but I just did my stuff at 35k because I'm real **** about my cars. I have to say I notice a slight difference in throttle response and idle quality with the new (stock) plugs and wires.

williamGT

iTrader: (5)

I use wireless plug wires

AlabamaGuy

iTrader: (5)

Bluetoof is the way to go....

blakss

iTrader: (4)

i was gunna run the NGKs and some taylor 10.4 wires and truck coils well see how it goes after reading all this

Count of Monte Carlo

The Taylor Wires have quite a bit less resistance so for the money I'd say have at it. The passenger side rear wires will need to be zip tied otherwise its good stuff.