Still too much loud on cold start of my 2016 Camaro SS, V8 6.2 with Bolra S axle back

[kbkgo]

My neighbor is complaining for loud start up on cold winter season in South Korea.

So, I changed the value in below.
Loud start up.jpg

A little bit better than nothing. But, still loud.
So I reduced Idle RPM value in Idle -> Start up -> P/N to Max 900RPM in every ECT and engine run time.

But, again still loud at first 4 sec.

It looks this loud start up came from Spark Retard as below. See spark retard hit -12 degree in 2 sec.
Loud start up-scanned.jpg


Guys, How can I remove this spark retard at cold start up.
I attached hpt file for your review.

No thanks such as below advise
- Change home
- Roll back to stock axle back
- Put sound deadner/Silencer on exhaust tip
- Move to Hawaii

[kenand1988]

It's -12 because that is whats commanded for that rpm under cranking spark. Are you the only one who has tuned this? It also has some changes under cranking airflow and torque which i'm not sure are needed. I would try putting those values back to stock.

[kbkgo]

It's -12 because that is whats commanded for that rpm under cranking spark. Are you the only one who has tuned this? It also has some changes under cranking airflow and torque which i'm not sure are needed. I would try putting those values back to stock.

Stock map has more spark retard.
So you mean, cranking airflow and torque should be adjusted? Where can i find those value? Torque management?

[kenand1988]

I pulled a stock 2018 SS manual file, there are no auto files, from the repository. Your tune has more negative spark. The cranking airflow and torque is under engine -> airflow -> general

Here is the stock tune I was referencing yours off of Attachment 127453

[kbkgo]

Your attachment has "Invalid Attachment specified. If you followed a valid link, please notify the administrator". So I couldn't download it.
But, anyway, I changed cranking airflow parameter as below.

Engine -> Airflow -> General -> Cranking Airflow and Torque
- Reduce airflow to 13.00 on range of 0.5 ~ 4.0 sec engine runtime with Temp. range of -16C ~ 44C.

I will report it soon

[kenand1988]

1513046313.hpt

Not sure why it wouldnt work but you can find a stock tune in the tune repository under your account on the hptuners non forum website.

[reubone]

That is the flare control after start up. on gen4 we would have a table to adjust for gen 5 i believe you have to work on the idle tq tables. you can also adjust your min spark table for the rpms that have the negative spark but you may end up with a really high start up flare. getting the flare after start up and the timing to stay positive will cure this or at least help a great deal

[TriPinTaZ]

Startup Idle and Cranking Airflow tables. Play with them.