Thanks!Yes to 7500
The Stage 1 power pack that I had for 3 weeks before i got my whipple raised the redline to 7300. The stage 2 raises it to 7500 i believe.Thanks!
Thanks for the info!It could be a bit of ping. That doesn’t necessarily mean there’s something drastically wrong, though. I have PP3 and run 91 and under load at lower rpms I’ll hear a little rattle that goes away with revs. Most noticeable if there’s a wall or truck next to you to reflect the sound. Mostly happens on warmer days (higher IAT). Ford likes to push the timing to and slightly beyond the hairy edge of knock...even on stock engines (manual: “Do not be concerned if your engine sometimes knocks lightly”). I’ve spoken to FP and they swear it’s normal, and I personally believe them. I haven’t read posts from PowerP users who’ve experienced engine problems related to pinging. But if you’re still concerned definitely talk to FP or get other 91 users opinions to see if your car is behaving as expected or not.
BTW I’ve spoken to gas station fueling truck drivers who’ve told me the 91 and lower octane lines get mistaken once in a while.