well I feel dumb now, I had it set at 9200 rpms but then I switched to the new tephra patch and forgot to change it haha.

thanks for the quick reply

 

just did a test run, surprisingly this didnt fix the issue.

 

Then you are setting it incorrectly or have a bad def. Can you post a screenshot of your table? What rom ID?

 

Why not? Can't you have six 3d tables and select which one you call based on which gear you're in?

 

you could but then usability suffers. I am sure tephra will figure out the best option.

 

yeah dont really want to overcomplicate the setup

 

I was playing w/ my rom tonight, and decided to sorta upgrade MUT tables, from an older version. I was checking to make sure the few request IDs I do know, were the same. In doing so, I noticed request ID 38, which is JDM map sensor... In my MUT table it reads 6AED. I am running the direct boost control, and the variable for boost control is 6AEC. Should this be changed to "6AEC"?

 

no, in the ECU the vast majority of variables are 2 bytes, but MUT's are only single byte.

so you are requesting the second byte of the MAP sensor...

 

Mrfred, i know you are busy, just trying to get support for tephra's next patch with the nifty gear dependent stuff

Thanks!

 

thank you sir!

 

I had my first issue w/ temp. change and overboost this weekend. (In Cali) So I have been tuning the car in 70-90* + weather, and this weekend w/ all of the storms, and it being winter and all, it was ~ 60 ish, maybe less, and I over shot boost by almost 4 psi... Way too much! This is w/ "direct boost control"... I was under the impression this method would account for weather temp. change a lil better than this... Should it react this way? 4 psi is a bit much, dont ya think? I have been told that approx. ~ for every 10* drop in temp. you get 1 psi more. Is this somewhat accurate?

The only thing I have done to the rom recently is adding the knock control, ignition trims, and the periphery blobbits. I started to read up on, but dont understand the periphery blobbits... Could this have an adverse affect on anything? I know theres a lot of stuff going on there. I didnt change any of the values.

Oh and I made my BB/MWGDC tables high and low instead of tables 1, 2 and 3.
I dont think this would have any adverse affect, but I am trying to figure out why I overboosted 4 psi.

TIA

 

to recap from the other thread, I have colder weather overshoot as well with psi based direct boost control.

upward tps correct 0'ed out ect, still spikes of almost 4psi...

 

4 psi overshoot is more than I've seen. Are you guys with the big overshoot values running GM BCSs?

 

no, i have been lazy and still use my aem bcs.. I need to go order gm 3 port soon.


it does not over shoot unless its cold or in offset gears. do you think it is a hardware issue? temp has to be -20 from normal for it to do this.


nonschlont has gm in his sig.. Im thinking its rom related, but Im a driver not a tuner so need the smart guys here to let us know how to best fix it

 

Its definitely not something related to a particular ROM. The overall tendency to overshoot is due to the changes in air temperature. How much it overshoots is a combination of how boost control is tuned and the hardware setup. tephra will have a fix in his next ROM series.