Quote:
Originally Posted by BenArmstrong
One thing the guy who did the dyno run pointed out was the reasonably rich afr and he seems to think there may be more power there if it was leaned up to the 12.5 mark however the ratio is nearly perfectly flat through the rev range which is great. If any of the guys at Perrin see this post and would like to comment that would be great  |
Ben,
Glad you are super happy!
During all our testing. we played with super lean, super rich and found that there was ZERO HP gained from going to 11.5 to 12.5 or even 13.5. The DI engine is super efficient and that is my guess as to why it makes no difference or at least not enough to make the car run hotter or closer to the edge detonation. Just so everyone knows, our tunes are set for a true 12.0 -11.7 AFR reading. Keep in mind that probes in the tail pipe can read leaner versus in the header.