Hondata

I have a Si reflash and from 4200-5200 rpm the A/F is fine at 13.2:1. But then from 5200-6500rpm it is at 13.9-14:1. From 6800rpm on it is back to 13.3:1. I dyno'ed on a Dyno Dynamics Dyno, it was cold in the garage at 50 degrees. Also i am at 5330ft.

caorndorff wrote:I have a Si reflash and from 4200-5200 rpm the A/F is fine at 13.2:1. But then from 5200-6500rpm it is at 13.9-14:1. From 6800rpm on it is back to 13.3:1. I dyno'ed on a Dyno Dynamics Dyno, it was cold in the garage at 50 degrees. Also i am at 5330ft.

Do you have a cat? If you test with a cat in the system, the reading may be leaner than it is. You might want to see what the dyno wideband says you are at a/f wise when you are at idle. If it's not around around 14.5:1 then that's a good indication that the cat is altering your reading.

Razathorn wrote:
Do you have a cat? If you test with a cat in the system, the reading may be leaner than it is. You might want to see what the dyno wideband says you are at a/f wise when you are at idle. If it's not around around 14.5:1 then that's a good indication that the cat is altering your reading.

No cat in the system