I had already tried Air_Man_vol previously, and it helped a little but didn't solve the issue. So I set the base fuel table to .875 for everything above .40 perload and set 320A to .40 which forced open loop and enriched fueling when I come up on the converter, but it will use the O2 for idle and driving in pits.patricktjms wrote: ↑2021 Jun 14, 15:23 I have had the same issue for a year now and can't rid my car of it. Same bog. Manifold volume doesn't do anything. I also leave at about 2000 rpm. Would love to find a way to richen with tps rate of change or something like that.
I always run in open loop all the time and the car will print time slips, but the bog is tricky for reaction times.
Keep in mind this is for a drag racing tune, only intended for WOT, not street driving.
What is showed me was that my fueling was way off in lower MAFV points, with load on the engine. The converter stalls so high, I'm either at 1v or 4v+ except for about one second on launch. I had not accurately adjusted the MAF points from 1v to 4v and I was lean on launch because of it.
The car seemed better after adding more fuel, but I only got one pass in after the MAF adjustment so I still need to make some more passes to confirm the MAF transfer was my issue.
On a side note... seems like we trying to accomplish the same thing with our tunes. What changes have you made in your tune to try and improve consistency?
I'm looking for things like making spark act like a fixed distributor with timing full in from launch thru the entire pass.