cormy Posted March 19, 2014 Report Share Posted March 19, 2014 Reducing the pulley to a 2.59. Have seen where colder spark plugs are recommended or sold with the package. Good investment or not really?? ALSO, how is the access to the rear plugs if I decided to go this route? Link to comment Share on other sites More sharing options...
ViperNC Posted March 19, 2014 Report Share Posted March 19, 2014 Every pulley kit I have seen recommends getting away from the stock plugs. Since you have to tune anyway, might as well get it right the first time. Plugs are inexpensive relatively speaking. Link to comment Share on other sites More sharing options...
KDog Posted March 19, 2014 Report Share Posted March 19, 2014 Rear plugs are easy to get to. Check out the thread on changing spark plugs...http://www.teamshelby.com/forums/index.php/topic/48326-54l-4v-spark-plug-change-step-by-step-instructions/ Link to comment Share on other sites More sharing options...
msb64 Posted March 19, 2014 Report Share Posted March 19, 2014 Handy to have for plug changes on the recessed plug heads: http://www.ebay.ca/itm/NEW-OTC-6899-Spark-Plug-Socket-5-8-for-GM-Chrysler-Ford-vehicles-/400346752969 It also helps to have an assortment of extensions handy as well. Link to comment Share on other sites More sharing options...
2007tungstenGT500 Posted March 19, 2014 Report Share Posted March 19, 2014 i was told by a reputable tuner that they weren't necessary and i ran the same pulley with the OEM Eaton for 50k miles without any problems on stock plugs. have since upgraded to a TVS still with stock plugs and all is good at 60k+ miles. but as vipernc pointed out, it's relatively inexpensive to change them out. Link to comment Share on other sites More sharing options...
silly fast Posted March 19, 2014 Report Share Posted March 19, 2014 At the very least you need to regap them ot .032. The increased boost has a tendency to blow out the spark. I would not leave my plugs in that long even though they say you can get 100,000 miles out of them. Carbon builds up on the end of the plug and not a good thing on alumnium heads Link to comment Share on other sites More sharing options...
Z-man Posted March 20, 2014 Report Share Posted March 20, 2014 I too thought you needed colder plugs if you changed your supercharger pulley. The plugs that were recommended to me were a different brand, but the same heat range as stock. As mentioned, the gap it the only thing that really needed to be changed. If you are due for a new set of plugs, you you need to buy a set anyway, but if not, re-gaping the stock set should be fine. Z-man Link to comment Share on other sites More sharing options...
Hopsgt500 Posted March 23, 2014 Report Share Posted March 23, 2014 I have the tvs w/2.59 pulley and kept the stock plugs (VMP did the tuning) and haven't had a prob, runs great. Link to comment Share on other sites More sharing options...
Secondo Posted March 24, 2014 Report Share Posted March 24, 2014 During WOT you can't hear pinging or detonation if your fuel or conditions aren't optimal. The colder plug recommendation could be a safeguard. The NGK TR6 plugs are about $2 a piece- cheap! Evolution Performance I believe did the initial tuning and testing with Ford for this mod and they recommend one step colder plug. Edit: Changing the plugs are very easy on this motor. Takes about 20 minutes. See link above. Link to comment Share on other sites More sharing options...
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