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s5fourdoor
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« Reply #105 on: March 21, 2012, 06:19:07 PM »
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hey its not as hard as it looks. have you seen the mbox update i've uploaded? give me an hour or two and i'll write you a quick exec summary for this thread here...
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Snow Trooper
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« Reply #106 on: March 21, 2012, 09:03:58 PM »
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the file is working off BTS for safety and knock based for primary. I could also add lamfa (driver requested) but it really isnt needed.
the cars fuel really good off this route, i was able to go drive my car today for about a half hour and it is the fastest its ever been on 91 oct with my latest file which is very similar to yours.
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cartoons?
6A 61 72 65 64 40 76 6C 6D 73 70 65 63
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marcellus
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« Reply #107 on: March 21, 2012, 09:17:26 PM »
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I am flashing my car as we speak with some new krkte and tvub values I just got from the calculator. Gimme a sec and I will post the tune as it sits right now.
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marcellus
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« Reply #108 on: March 21, 2012, 09:36:39 PM »
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I was thinking of using the dynamic fueling and timing because of how my turbo is. With the thing not opening until 15-18psi as you directed the car is a low rpm animal. I can start off a steep hill in low rpms and the car will boost and go. The car feels like it has a much larger displacement motor. You saw the logs. Only thing changed now I think I have it set to stop at around 22psi.
I went back and forth trying to figure out the VGT. With the TC eliminated I was able to rev it out and I can actually see the difference of when it opens up. Spool is hella fast with it closed up to around 7-10psi. From there the actuator was opening up too fast or too early and spool would flatten and build proportional to RPM. So lets say 7 psi by 3kish and up to 21 psi very gradually until 6.5k. You were right with the idea of keeping it closed for longer.
This also does not happen at WOT. I hardly ever go WOT since I dont really need to. THe few times I have gone flat out...Yikes.
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marcellus
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« Reply #109 on: March 21, 2012, 09:37:30 PM »
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hey its not as hard as it looks. have you seen the mbox update i've uploaded? give me an hour or two and i'll write you a quick exec summary for this thread here...
I have seen the mbox update you uploaded. I will be looking through it at "work" tomorrow. |
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marcellus
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« Reply #110 on: March 22, 2012, 07:44:37 PM »
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the file is working off BTS for safety and knock based for primary. I could also add lamfa (driver requested) but it really isnt needed.
the cars fuel really good off this route, i was able to go drive my car today for about a half hour and it is the fastest its ever been on 91 oct with my latest file which is very similar to yours.
What are you doing to dial in your KRKTE and TVUB? |
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marcellus
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« Reply #112 on: March 23, 2012, 07:39:18 AM »
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I already am using it. I ran my first LTFT numbers through it a couple of days ago and will try it again after my long ride home tonight.
I think I should leave the setup alone for a little bit. I have boost piping that likes to come just far enough apart to be a big leak under pressure. Only reason I caught on to it, I kept hearing a loud hissing noise as I built boost over 10psi. The turbo wasnt very happy as it screamed trying to make the boost. Its time I upgrade the intercooler and some of the piping anyhow. I need to also drill and tap the manifold with a fitting to reroute my brake booster, or a line to a vacuum block that I am just dying to throw in there. oh yeah, and make an actual pcv/catch can setup so I dont die when I turn the heat on when sitting still.
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jibberjive
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« Reply #113 on: March 30, 2012, 11:13:33 AM »
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I just did a bunch of reading on this turbo, and I'm really stoked for the turbo selection! I'll be watching much more closely to see how this progresses.
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marcellus
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« Reply #114 on: March 30, 2012, 11:42:25 AM »
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Thanks!
My issues right now are mostly VGT related. The thing can spool rediculously fast, virtually eliminating lag. I just have to find that sweet spot. If it is set up to spool instantly, Until I have an electronic solution for control or a better mechanical one, I feel it is a bit overkill. Its nice to make a nice clean pass maneuver on the freeway without downshifting, but at the same time I would like a way for it to be that way only when needed. Maybe a way to have it open under high vacuum, I dont know yet. I am toying with the idea of running a vaccum acuator and a boost refernced one.
I dont know if any of this makes sense. Its just a bunch of jumbled thoughts in my head, hard to expalin.
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« Last Edit: March 30, 2012, 11:51:45 AM by marcellus »
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marcellus
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« Reply #115 on: April 08, 2012, 09:00:43 PM »
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 I had to pull the motor because I am retarded and drop bolts in the transmission and like to jack up the trigger wheel. Turned lemons into lemonade and decided to clean up the bay some while the flywheel was at Fidanza getting fixed. Not much tunign wise has been done other than the addition catalyst heating turned off. I am surely glad Storm Trooper asked that question and got it figured out. Idle feels a lot better and steady over a long period of idling. I somehow broke my MBC so I havent been able to get at the actuator for the VGT yet. Its nice that it spools hella fast, but with it being held to a minimal postion all the time, I am sure overall power is being killed. |
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« Last Edit: April 08, 2012, 09:05:24 PM by marcellus »
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Snow Trooper
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« Reply #116 on: April 13, 2012, 02:23:56 PM »
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God I love your car, so much potential still...
Been thinking about it, let's try to use the vtg in place of the wastegate. It will take tremendous restraint on your part but we already know you have that with your locked duty cycle map...
Imho I think you should plumb the vtg actuator to the n75 and let the gate just be dead for now. Let's tune the pid control to run the vtg through its motion and limit boost by increasing ar through out the power band and not all at once like before.
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cartoons?
6A 61 72 65 64 40 76 6C 6D 73 70 65 63
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s5fourdoor
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« Reply #117 on: April 13, 2012, 02:46:32 PM »
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God I love your car, so much potential still...
Been thinking about it, let's try to use the vtg in place of the wastegate. It will take tremendous restraint on your part but we already know you have that with your locked duty cycle map...
Imho I think you should plumb the vtg actuator to the n75 and let the gate just be dead for now. Let's tune the pid control to run the vtg through its motion and limit boost by increasing ar through out the power band and not all at once like before.
this could be very difficult without precise information and a working PID model... if anyone can get it done, its snowtrooper, but still check out chapter 3 of this dudes thesis: http://www.fs.isy.liu.se/Publications/MSc/06_EX_3799_JO_MW.pdf |
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marcellus
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« Reply #118 on: April 13, 2012, 03:06:16 PM »
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It is something I thought about seeing how boost stops building when vgt is open. I guess I could run a heavier spring in the wg. I really didn't like the idea of a mbc because I felt it would open the vgt too fast when set boost is reached and freak the ecm out again. I was considering using all sorts of tactics to dampen the actuator like springs.
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Snow Trooper
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« Reply #119 on: April 13, 2012, 03:26:21 PM »
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It can totally be controlled by the n75
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cartoons?
6A 61 72 65 64 40 76 6C 6D 73 70 65 63
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