So many LSA guys running these injectors without this issue. Unless hundreds of tuners are just ignoring it.
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Wonder if it may have something to do with the bypass valve possibly? Considering it happens around 50-70ish kpa (for me) that valve is going to be closed a fair amount at that point...wonder if that is causing some goofy reversion with whatever angle it's at at those kpa levels....I'm just thinking aloud essentially
No, its the boost bypass valve assembly located on the left side of the snout....when you are just cruising around this valve is open and allowing air to "bypass" the supercharger rotors and go straight into the engine. It's vacuum/spring actuated so when you get into boost that valve closes and all the air is passed through the supercharger rotors
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I don't run the bypass valve, btw
2.55 pulley and all cats deleted
Exactly right. There are two people that notice this...ones with obvious drivability issues and ones (without drivability issues) that are paying attention to the data in the logs and know how to tune the VVE table.
I have been following this thread and it seems like the commonality is aftermarket injectors. If it were me, I would temporarily pop in my OEM LSA injectors and log/test a few times. Unlikely they would be anywhere close to 100% duty cycle at 2,600 rpms. I know that when I put LSA injectors in my LS3, they caused all kinds of issues due to the spray pattern, I so I removed them and the issues went away.
Yeah, I disabled the MAF, disabled O2's and forced speed density. Then used wbo2 EQ error to tune VVE. I usually do up to 4k rpm because that's when I do the dynamic airflow disable. This time I just did it up to 5k and then continued the added fuel up to redline in the load areas as if I was tuning SD only. I noticed a pretty good peak at 3400rpms and was surprised. But I dont see much of a spike on the wbo2 like around 1600 and 2600.
I'm seriously thinking about attempting to install a honeycomb airflow straightener in front of the maf to see if that helps any. I'm to a point where I may throw in the white flag as I really want to get in the car and just drive it WITHOUT a laptop in it..lol
Do it! Actually thinking that might be easier/better than installing the old intake. Was looking at getting one to adapt into my airaid. https://performancemrp.com/c-1389190...er-screen.html