Hi guys what spark plugs should I be using and what gap the car is running 19psi of boost and making 460whp but when the car hits full boost it's starts to drop out and in
Plugs I run ZFR7F at 19psi (~360rwkw). They are .8mm and exactly match the projected tip design of the stock PFR6B-11B but are one step colder and a good gap for boost. Available for $2.50 USD each on ebay; I buy 24 at a time and change them regularly.
Try a set of these http://www.ebay.com.au/itm/FORD-BF-...hash=item3cf4232641:m:mOqAACTDUEi_13dhsD56Ing