Originally posted by AdamSVT:
What dou you guys think about running a colder plug, like the NGK-TR55's?? my buddy has a GTP and runs them and noticed a difference. Also what about the Ford Racing wires? are they alright?? what is the stock plug gap anyways? thanks. Alsoi know this is a little off topic but where the heck can i find a B&M Shifter for a decent price?


I would not run a colder plug.

However the plug you mentioned is the stock heat range. A step colder in NGK is TR6

Step colder in Motorcraft is: AWSF22C, AWSF22FS, AWSF22PP, AGSF22PPM


I still would not recommend a colder plug for a NA car. Some of the hybrids with CR over 11 and aggressive timing could likely make use of them. Especially if less then optimal octane fuel is not available.

I found my 2.5L at ~10.3CR and ridiculous advance would not detonate on either heat range plug - stock 3 or colder 2. The stock heat range plugs (AGSF32PPM) did seem to give a tick better gas mileage though so I stuck with them for better efficiency.


I also would not run FMS wires. Hit or miss.

Stock wires are good but expensive for stock.

Magnecor are the best but again very pricey.

Folks have reported good luck with Autolite Professional wires as well. They also are well priced.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.