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2018 Zl1 a10
416
Ported heads
stage 3 cam with HPFP shim
112 TB
ported blower
2.3 upper
8.45 lower
2" headers
5" intake
3"mbrp exhaust
interchiller
160 thermostat
bumper tank
EWP 32 water pump
50/50 meth injection
flex e50-60
aux pump
Changed some parameters from the tuning school gen v idle guide but idle is hunting. How do i go about stabilizing idle? Any help would be greatly appreciated. attached log and tune
Your Airmass seems to be too high in the idle area. Your VVE table looks off. It's no longer recommended to adjust throttle area without adjusting the rest of the new tables for the big 112mm TB. Your SOI table needs some work when you start WOT dyno tuning. Your timing table in the idle area needs some work. It might be fine once you get it to idle properly but the way it is now is exacerbating the idle swings. Your minimum spark strategy is wrong. That is OLD info from those Gen V books and no longer the right way to do it. If its tuned properly, you can run stock Minimum Spark tables and never have an issue. Your Virtual Torque could use some help. The shape should roughly follow the new power curve. Idle area is not very good. You should log Zero Pedal Torque PID in your logs. This will help you make sure you are seeing near 0 torque at idle. If you're not, your airmass, VVE or Torque is wrong.
What do I think is making the biggest negative effect here? Your adaptive idle torque tables. You need to add sensitivity to the spark based idle control and remove sensitivity of the throttle based idle control. Essentially you want spark do most of the work for anything +/- 100 rpm and then start allowing the throttle blade to lightly assist. Do some research on Immediate vs Predicted Idle Speed Control for Gen V.
The Tuning School’s Gen V “tuning classes” are absolutely garbage. They owe everyone that took them a 100% refund. There’s no way I’ll ever take them seriously again after how bad that Gen V course was. They were so wrong about VVE and VTT it’s not funny.
I had similar problems to the OP once upon a time. A knowledgeable tuner like Jason and others on this forum can get you squared away and it’s 100% worth the investment. You’re not going to just “figure out” Gen V tuning without some expert direction. Once you have that you can then see what they’re doing. After 8 years on this platform, I just pay the pros lol
Thanks Josh!Quote:
Originally Posted by Joshinator99
Yeah the Tuning School's books are incomplete, incorrect and pretty much garbage compared to the actual knowledge today.
Word of advice, don't run a lashcap (shim) with a LT4 hpfp. It's for LT1/L86/L83 style pumps when running a 32% fuel lobe amd can break a LT4 pump. You have alot going on with that build and I tune a bunch of them with those mods. TB max area should be around 7400 with a 112mm, your airflow numbers are way off resulting in very high tq numbers at idle. If your VE airflow is about 10% over your actual maf readings (you're fueling it based on maf in the tune attached) you'll be pretty good. Change your prediction coefficients (base) to .99 across the board.
Ugh. Thats kind of what i was afraid of. I didnt have a problem tuning gen 3 and 4 stuff but gen 5 is so different. Is there anyone here then that can help me tune my car?Quote:
Originally Posted by TriPinTaZ
I tune these vehicles all the time. DM me if you want
dm sent