HE351VE in a 4g63

Started by EvoAuto, July 15, 2015, 12:39:07 AM

EvoAuto

Quote from: kapok6 on July 22, 2015, 07:11:38 AM
When you say "spooling", what do you mean?  It's just starting to spool and build boost at 4000, or it's at "full" boost (10psi) by 4000? 

I'm at about 12psi at 4000RPM. I will log a bit more this week.

hakcenter

If the turbo doesn't sound like a turbine, move the curves up again by 20

And if you can, save a pull from the serial output to a txt file and upload it for me to read
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

EvoAuto

I will give it a try. I was planing on also trying what you suggested before regarding the wastegate. Once i find out what turbine speed corresponds to what boost pressure I'd like to have the controller try and regulate the boost. Where do I enter the max shaft speed?

hakcenter

It's already setup to max out at 130,000, which is about 40psi on my vehicle. You could curve it down to 80k.. etc

It is near the bottom section of the calculate curve tab
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

EvoAuto

Did some more tuning this evening. Got the turbo to 13 psi by 3200 RPM's in 3rd gear. I'm not sure why the turbo's position does not change at all regardless of shaft RPM. At 14 psi the shaft is spinning at around 85000 RPM's at position 800. Here is a log as well as the modified LLB code.

hakcenter


* Turbo RPM Curve : 4
   * 4000 - 9000  : 40 - 900
   * 9000 - 17000  : 900 - 840
   * 17000 - 26000  : 840*
   * 26000 - 39000  : 840 - 800
   * 39000 - 1464  : 800 - 740
   * 1464 - 105000 : 740 - 700
Done.


ran out of room in the int on the last curve rpm.

change the curves to

unsigned int curve_rpm[5] = { 9000, 17000, 26000, 39000, 65500 };


That'll fix that for the most part.

Performance mode sets vane position to current curve position + the position from JP1. * When calculated vane position + performance is not at least 800, vane position is set to 800. That's why you aren't going to see it change vane position at all. Keep it out of this mode until you feel like the turbo curve is right.

Please for the sake of tuning this turbo, don't use performance at all, the curve isn't tuned well at all and having perf mode on isn't going to do anything until the curve is stable.


The turbo isn't hauling until it is @ at least 110,000rpm, you need to be able to get it there without it holding your motor back.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

hakcenter

Here's an update for you..

I've included a lot of other changes I've made, like the accel variable is in.. etc...

I moved your curves around, let me know how it feels in the car accelerating. Is the turbo holding it back or is it just not spooling fast enough, you can find out by toggling the cruise switch and if you feel the car accelerate the moment you hit the switch, the vane positions are too constricting.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

Ryan

Keep the updates coming!

EvoAuto

Quote from: hakcenter on July 28, 2015, 08:47:20 AM
Here's an update for you..

I've included a lot of other changes I've made, like the accel variable is in.. etc...

I moved your curves around, let me know how it feels in the car accelerating. Is the turbo holding it back or is it just not spooling fast enough, you can find out by toggling the cruise switch and if you feel the car accelerate the moment you hit the switch, the vane positions are too constricting.

Funny you say that actually. Tonight while driving home i decided to leave it in performance mode (position:800) and did a full throttle pull; At 4500 it was at about 15psi when I flipped the switch to cruise (p:300) and the boost just kept climbing and fast. At 6000rpm it was reaching 25psi. My wastegate couldn't control the boost at all.

I will upload your new code tomorrow and try it out. 'Idle' mode is what I should be in correct?

hakcenter

Ya it should be in idle, when turbo rpm is under idle rpm, and it should walk down if turbo rpm goes over walkdown rpm once, then rpm ever goes under it

Also remember that there is priority in the modes.

Cruise > Brake > Performance.

So with Perf on, you can't get into cruise without turning perf off.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

Rx7man

Isn't it a little redundant to have a wastegate as well as a VGT turbo?  At this point it might be a simple way to control the boost, but you shouldn't need it at all
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

hakcenter

I tried to let him know during fab that it is not necessary. For compounding it is necessary but I don't think he'll be compounding.

No problem thou, just mount a block off plate.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.

EvoAuto

I had a different setup in the car before that's why I have a Watergate. I plan on using it for knock control since my ECU does not communicate with the arduino board.

Rx7man

That makes sense.

Your ECU could communicate with the Arduino in a limited fashion.. you could have the wastegate control hooked up to an input on the Arduino, and some added logic could open the VGT when it gets the signal that would normally open the wastegate... just a thought
'94 dually,  67/67 HE351VE, NV5600, ~600hp
'93 ECLB 47RH, new toy truck, H pump project, 1000hp goal, 300K miles
93 XCLB auto, bone stock, 350K miles
93 XCLB 5spd, bone stock, 100K miles

hakcenter

Not on a dsm,  there's no real output. It communicates at 1953 baud, etc

Only way would be to interface the boost gauge output and make it a knock gauge. Then measure the output on an adc on the arduino.
TS2009 Deḇarim 8:2
"And you shall remember that יהוה your Elohim led you all the way these forty years in the wilderness, to humble you, prove you, to know what is in your heart, whether you guard His commands or not.