f14 stock tune.
1) If I'm not mistaken, the pulley is the balancer, so a smaller pulley that slows down the accessory drive will also be lighter. Your idle characteristics could change after the tune, albeit slightly
2) to swap cams, you are going to remove the pulley anyway (unless you already have a two piece timing cover) so why go through all the effort to reinstall the stock one, only to remove it later? To me its one more TTY bolt and a couple more opportunities to risk screwing up the threads in the crank.
3) if your tuner is going to give you a dyno number when he's finished, wouldn't you want your number to reflect the gains of a pulley? I would think yes, especially since your 9" and 4.30's are probably going to cost you a few HP over a stock 10 bolt with 3.42's
As for driving the car untuned, I personally would limit it as much as possible, although I've seen other members post that their stock tune worked just fine with an MS4, in an auto no less. Your car may drive fine, so just use good judgement once you get it running.
Good Luck!
Trending Topics
The Best V8 Stories One Small Block at Time

how do you like it? sound clips?


