Quote: Originally Posted by
stroudtom7 
I wasn't going to change fuel any without a wideband. Looks like pulling some timing wouldn't hurt. Is that a safe assumption without a wideband?
Eh...yes and no. There's still a fine balance. If you pull too much timing, without enough fuel, you'll be in danger of raising your EGTs to unsafe levels (which can still cause knock). Having the full picture helps you determine WHAT is causing the knock, which in turn, helps you tune your car properly and/or address anything lacking in your setup.
In addition, the tune you're running is known to be rather lean. It'll easily put you up in the 12.0-12.3 A/Fr range, and regardless of what anyone says, I am personally NOT comfortable running that lean. I had to add a bit of fuel across the board to get into the 11's, where I'm more comfortable...and I knew where to add the fuel because of my wideband. It's like trying to tune with just your A/Frs and timing. Without knowing your boost, it'd be difficult to make appropriate adjustments. A/Frs, timing and boost aren't everything when it comes to tuning, but they're the foundation.
