2012 ROUSH STAGE 3 tuning questions

[Whipple V8]

I bought a 2012 roush stage 3 all stock and i recently added a jlt cai, 82mm pulley, 90mm idler, 56lb injector, vmp boost a pump, stainless works 1 7/8 longtube headers and off road x pipe. i wanted more power but i want it to be safe and last awhile and most of the people i see online are pushing 570-600whp with this pulley depending on tune and upgrades. now i know headers will add more but i dynoed 649rwhp, 546rwtq seems way high and my afr under WOT goes from 11.8-12.0 range. is that too lean? from what i found that safe is more like 11.5? is my afr safe or no?

 

[Whipple V8]

the 497rwhp is the 100% stock dyno which reads a bit high for a stock stage 3 so im more so worried about my afr

 

[jn2]

Stay below .80 lambda and you should be fine. If you really want to cut down on power remove 1* of spark advance across the board and set your lambda to .78 during WOT. That should bring your power down to the 625 range...

 

[Whipple V8]

What does .80 come out to in Afr?

 

[burke985]

That does seem like high numbers seems like a happy dyno, your AFR's should be in the 11.0-11.4 ish range so yeah id say your running lean and would not beat on it until i got that resolved. How did you get your AFR numbers ? Also were these the SAE or STD numbers, if its STD there can be up to a 20whp difference with correction factor figured in so you actually be right where you wanna be power wise.

 

[burke985]

Check this video out its pretty helpful.

https://youtu.be/AaQiKYbYksg