Plugs and wires question.

[Doug_Guilds]

I am wanting some input on Spark plug brands, and Plug wire sizes.

The engine is the 89 3.1 in my race car. Factory size wires are 7mm, I am curious if an 8mm wire would be better for my app. I have been running the Bosch platinum plugs, but have read a few bad things about them as of late, what brand plugs do you guys like? Thanks in advance for the input.

 

[Street Wolf]

Platinum plugs are about the worst thing you can run.


Get some Autolite 104's and stick with the stock plug wires, there is no point in upgrading.

 

[SyntheticShield]

I had an '89 GP but it had the 2.8L V6 in it. Not the gutsiest of motors but I did run Autolites in it. I also ran low resistance wires and at least in that motor there was a noticeable difference in acceleration and response with the wires. I later chipped it and that helped out even further. Granted, it was a 2.8L but it was a whole lot more fun after that. I sold it with nearly 200k on it and it still ran strong. I even had it checked out by Pontiac. Had them put it on the diagnostic machine to check out the engine and to see if there were any unforeseen issues and even they commented that it ran dang good for a car that old at the time and with that many miles. It was 1998 or 99 that I sold it.