SAFC 2 AFR and larger exhaust
#1
SAFC 2 AFR and larger exhaust
I was curious on something. Previous to my new exhaust i had the stock size piping (1 7/8") and i had my AFR dialed in to run at 12.8- 13. Since i upgraded to a 2.5" exhaust when i go WOT or close to it the AFR seems to stay at 14 -15 still. I have read adding headers you have to readjust the SAFC for afr as it changes. But i have read adding headers richens your exhaust so you have to take out fuel or make the readings on the SAFC into the negatives. Would this be the same for adding a bigger exhaust minus headers. Keep in mind im running..Sotck manifolds-gutted precats- testpipe- 2.5" exhaust- flowmaster muffler. So what im wondering would i have to readjust and add fuel or reduce fuel?
#5
thats correct. Im just wondering y headers u need to lean it out and with me adding a bigger exhaust i would need to richen it. Unless the bigger exhaust is making the engine suck in more air but the fuel is the same in that respect i guess adding more fuel would be the right approach
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