2022 ZL1's using manual bypass control from factory

[lt1z350]

We had one of these ported already its the same on the inside its gm is using the throttle as the "abuse" valve. Im making 14 psi from one of these on stock pulleys and it sort of shocked me. You will see my other post.

[TriPinTaZ]

I have now done two of these gm is using the throttle control as the abuse valve vrs the actual valve. Hptuners scanner is also not logging boost/kpa correctly on it for some reason. Stock car I had shop take off the bypass line and cap it leaving on the vacuum side only so that it will open at idle as it should. rotofab big gulp and e70 car is making 670whp a10 1le car. Log shows it as 9.5-10 psi but its at 185 kpa peak and in florida with 14.2 baro do the math its 12.6 psi and not the 9.5 the log is showing.. I dont typically see this issue on early cars. Car is very fast has put 2 cars on a local 2020 gt500 that has a intake and 93 tune. The new blackwing is using the same blower setup and as known cant be tuned. I was curious if gm changed the upper pulley on the zl1 like the blackwing to a little smaller stock but yet to measure it. But nearly 13 psi stock is pretty good on one of these and a little higher then typicaly see.

Just looked at a log from a cooler night and it was 195 kpa peak on the log racing the gt500 and that is not ususal for one of these. I was going over dyno logs and on the dyno it was 185 kpa so maybe this one has that smaller upper like the blackwing that has a little higher hp rating from gm 668 vrs 650 I believe. Car did baselne 560whp and this dyno is known for being the heart breaker of south flordia as crushes so many kids on dyno days for what they think their ricer is making for hp. lol
Car is going to get headers are the usual mods here soon and expect it to do very well seeing what I have so far on it. 6.5 60-130 ao far is his best and its been pretty hot in south florida.
But back to topic look at the kpa I bet your higher then what psi is showing on logs. I see this all the time on the 4 cylinder turbo gm cars I tune so got used to looking at both and comparing pids as hptuners is often not correct on it.

Yup, you have to use hi res Manifold Absolute Pressure to get the correct KPA value for the 2022, then use this in a custom math to get the right PSI PID working. Also, you cannot increase a lot of the SuperCharger/Turbo and other airflow values beyond a reasonable amount on the 2022 or the throttle body will only open 50% no matter what you try to do. I used to just max out these tables to 10 or 255 even though they didn't really do anything as I didn't want a limiter. I found the 2019-2021 cars were sensitive to some of these tables and would lock the throttle body at 50% at WOT. Then the 2022 model is even more picky about what tables you adjust under the Turbo/Supercharger tabs and even the Engine Diag section in regards to airflow. You can no longer max these values out on the 2022.

[lt1z350]

On this one I just did which is a 1le I’m actually maxed out on them and it’s working fine. But it also has an un locked and programmed tcm. But the 2022 normal a10 I did that was big gulp headers and 93 it did act all funny after I did my normal max on them. So put back to stock and it’s working ok so far but not making a lot of power.
That one was being really weird it was going into rep for. I reason at idle and no codes at all. I had him cap the battery then reload the tune with write all and it went away. Some of these people don’t understand that the file can get corrupt of write it on low voltage radio on a/c on door open. I have got into the habit of now telling people how I want the car wrote to avoid issues on corrupt data and tunes.
Oh so it timed out as battery was almost dead will that hurt it.?? Lol
So if car sits start car let idle charge battery then radio blower off door closed lights off write vehicle cal only. Trying to tune around corrupt files can make you pull your hair out. The by the way after I wrote your file the battery was so dead it didn’t start doesn’t always come up in conversation.