When I went lean with the 181, I installed a SL55 fuel pump and corrected the problem. FYI, tuning didn't help, as I tried.
A while back I added a smaller SC pulley (stacked) and the lean issue came back. After a few retunes the problem persisted. Subsequently I installed TTM injectors and resolved the problem. I've also installed the TTM fuel rail with front crossover for good measure.
Don't ask for track times, as I exploded my differential at the track a few days ago. Track times aren't the most important thing with fueling though, it's the Air/Fuel ratio. As you'll see in the image below, my air/fuel is right on the money. A big shout-out to Bruce at TTM for telling me to stop being stubborn and to give the setup a shot. A big thanks to Steve for introducing me to Bruce and hooking me up.
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FYI, the newest version hides the braided line completely.
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Here's a few pics of my poor XF after the abuse. I really appreciate all the assistance from my great friend Steve Rivet (32krazy!), for all the help.
Here's my baby caching a ride back on Steve's trailer:
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Here's a few from my garage after Steve and I (Steve mostly) pulled the carrier:
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