I am using an aem bcs to control boost. I am also using mrfreds way to have it be based off of 2 byte load so it stays more consistent with temperature.

I am hitting 370 2 byte load around 4,000 RPM in 3rd gear. (BBK Full E85) I set my boost adder to 220, and my BDEL is filled in to follow the load from the log.

My problem is during spool up. Since I hit full boost by 4,000 RPM in 3rd gear, Im only at 100ish load around 3,000 RPM.

So when I floor it in 4th - 6th gear, I will not reach full boost until 4,000 RPM. I assume because that is the load that the BDEL and boost adder are trying to follow.

How can I tune for each gear? I would like to get this tuned out now instead of waiting for gear based boost control with the new tephramod.

Thanks for the help

 

Tephra's V6 has boost by gear feature. The V7 will be out shortly though, you can wait and get the V7 or just use V6.

 

I didn't think v6 was out yet? I have 88590015.

 

It is out, https://www.evolutionm.net/forums/ec...6-testing.html it is/has been tested by members with great results. I am currently on it now, and it is working flawlessly.

 

So just use the link on the first post? 88690615 that says untested? Thanks for all of your help tonight. Im very grateful.

 

Yes, use that one. It says UNTESTED but it's being tested with great results. I'm currently using it on my Evo IX on 88590615 and I don't have any problems. And boost by gear is great! Though, I'm now using psi based and not load based.

 

I would really like to get the car running good on tephra5.10 for the time being I think. There has got to be a way to keep the boost or load somewhat consistent throught different gears isnt there? I tried upping the bdel from 2000 rpm to 4000 rpm. I then turned down the wgdc up to 4000, and now I over boost badly in higher gears...

Here are the current settings that overboost in any gear higher than 3rd gear. Any help is very much appreciated. Thanks

 

Also, here is a log so you can see the load. This is when I had the correction at zero for tuning the boost curve though. The load looks kind of funny, but the boost is actually pretty flat until it starts to taper.

 

Make your total load 320. So adjust your boost desired table to read 100 until 6000rpm and then start dropping down. Take out the two 10's in the Max Total Upward WGDC correction vs TPS table and add back in the upward correction in the Error Correction table.

 

This is the key here. Been doing that for over a year now with huge success. Very vital on the track (circuit) cars that see huge changes in load/boost with throttle inputs/steering/etc

- Bryan

 

Ok I will try that now, won't it always be trying to correct things if I have my max target load 320 though?

Thanks guys

 

To tune your car to a desired boost curve you can zero out your Error Correction table. Doing this you will be running purely on the duty cycle numbers in the WGDC table. Adjust the duty cycle until you get your desired boost curve. Log Error Correction and adjust the Desired Engine Load table until error correction is near zero. After you've done that you should put your numbers back into the Error Correction Table.

Tuning accurately with only WGDC is the key to avoiding overboost. The Error Correction table will help too but will also compensate for changes in temperature.

 

BTW, I'm running a BBK full on 50/50. I pasted your log into Virtual Dyno Room and compared it to one of my logs. The results are very similar except from 6000rpm your car keeps gaining power where my HP curve starts to flatten out. Your car made 433hp/369lbft, my car 409hp/363lbft.

 

What numbers to you guys reccomend for the tbec table?

 

With upward correction vs TPS zeroed I would try something like this, fine tune depending on how tight you are tuning the BDEL and what solenoid you are using.