- Joined
- Sep 13, 2011
- Messages
- 815
Honestly I don't think there is a short way of telling these events but I'll do my best. First off I'll say that both the tuners I purchased a tune from are two of the most recommended around here and both were exceptional to talk and deal with. 2015 I purchased a tune to correct my magnum xl gearing and provide a few more ponies. It ran kind of rough with what seemed to be some throttle mitigation rather than more power adding. 2016 from another vendor I purchased a tune and 2.5 pulley. Again a rough and loud engine as though the timing was way up at idle just to give a more responsive tip in of the throttle. With a pulley and tune I expected to be able to rip the tires off the car in first of course (even with the r888 tires )but it wouldn't. 2017 July, I thought, I'm going to try this 2.5 pulley with the stock tune and see how it runs. All else is stock right down to the factory somewhat dirty air filter with the exception being the fanned heat exchanger. Let me tell you, this car is moving like never before, with a smooth idle, smooth power delivery. an iat 2 of 120 to 130 F. One strange thing though, with the pulley staying the same, tuned my boost gage showed boost being at 13 psi and with the factory tune it shows 9 psi. Either way,I've always wondered and see alot of people asking if a tune is needed with a pulley swap. While its only been one evening of testing(wot through many gears ) it seems to be that my car runs stronger and smoother with the 2.5 pulley and factory tune. Have I made a mistake? am I pushing it too far? Let me know what you think. I can tell you this car is hauling ass now. BTW no wrench or warning light as of yet.