drshotty Posted April 7, 2015 Report Share Posted April 7, 2015 Bought a 2.6in pulley and a metco idler pulley for the slack. and a cai. and was reading somewhere that in order to run a bigger pulley i would need to buy heftier spark plugs otherwise the ones i currently have would blow up. Is that actually true? Also does anyone have a specific place they enjoy getting a tune from that has always worked well for them? I will be continuously doing upgrades so I'm just going to use this topic over and over. Link to comment Share on other sites More sharing options...
shel-b001 Posted April 7, 2015 Report Share Posted April 7, 2015 Do you mean to say your install a smaller pulley ? What are you installing it on ? As far as the spark plug you will go to a cooler plug if installing a pulley , & tune. As for a tune there several out there Ford Racing, Steeda IE Is this going on a Shelby G.T 500 , G.T , or a G.T350?. Link to comment Share on other sites More sharing options...
drshotty Posted April 7, 2015 Author Report Share Posted April 7, 2015 2010 Shelby GT500. Smaller* pulley my apologies. and i didn't know if installing the plugs was necessary or not. Just thought americanmuscle was trying to get more money out of me lol Link to comment Share on other sites More sharing options...
Secondo Posted April 7, 2015 Report Share Posted April 7, 2015 With the 2.6 pulley you'll need one step cooler plugs like the NGK TR6 to compensate for the increased boost. Link to comment Share on other sites More sharing options...
kawwy600 Posted April 10, 2015 Report Share Posted April 10, 2015 I have a 2.5" pulley on my 2010 with stock plugs and 0 issues. I spoke with VMP and Lethal Performance prior to installing my pulley and both vendors said stock plugs are fine but for track use they would recommend colder plugs. Link to comment Share on other sites More sharing options...
Secondo Posted April 10, 2015 Report Share Posted April 10, 2015 When you're in the increased boost is where the cooler plug is most effective. Link to comment Share on other sites More sharing options...
2007red40thGT500 Posted April 10, 2015 Report Share Posted April 10, 2015 you don't need them. stock are fine. like others have said, it might be a different story if you are drag-racing or road-racing all the time. Link to comment Share on other sites More sharing options...
drshotty Posted April 11, 2015 Author Report Share Posted April 11, 2015 im in texas where it gets to 100 degrees no problem with a humidity of 100%.. don't know if that would make a difference, ill probably install the plugs anyway. Also for sure going to change the shifter. Do y'all have a preference? Ive heard MGW is the best without a doubt. Not nearly as notchy, haven't really heard of any others. Link to comment Share on other sites More sharing options...
Secondo Posted April 11, 2015 Report Share Posted April 11, 2015 The cooler plugs are included with Stage 2 kits (2.6 pulley, CAI and performance tune) from Evolution Performance and others, probably to keep detonation in check when in the increased boost. The NGK's are around $2.50 a piece so I view it as cheap insurance, not them trying to get more money. Link to comment Share on other sites More sharing options...
08KR525 Posted April 11, 2015 Report Share Posted April 11, 2015 It won't hurt to install new plugs that's for sure. I went with the NGK Iridiums that are one step colder than stock after I installed my TVS. Be sure to gap them correctly. Higher boost requires less gap or you'll blow the spark out before it can ignite the fuel in the combustion chamber. Link to comment Share on other sites More sharing options...
drshotty Posted April 11, 2015 Author Report Share Posted April 11, 2015 Thanks guys! I appreciate all the help. Link to comment Share on other sites More sharing options...
Secondo Posted April 11, 2015 Report Share Posted April 11, 2015 Gap .030-.032 for Stage 2 performance tune w/CAI and 2.6" supercharger pulley. Link to comment Share on other sites More sharing options...
Cdvision Posted April 12, 2015 Report Share Posted April 12, 2015 If I was in a place like Texas where the temps outside can get quite high. The first mod I would do would be a higher capacity, dual fan heat exchanger. A smaller pulley will make the supercharger spin faster and run hotter and increase the chance that your car will pull timing and nullify any gains the smaller pulley will give you. Heatsoak is a big problem with these cars when you start getting into warmer summer temperatures. Link to comment Share on other sites More sharing options...
ZEROED Posted April 12, 2015 Report Share Posted April 12, 2015 drshootty - MGW is the shifter to go with IMO. I am in Austin, and agree with the post about upgrading the heat exchanger before any supercharger modifications. Link to comment Share on other sites More sharing options...
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