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Old 01-18-2017, 10:45 PM   #276
martin028
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Just to report in, I posted probably a year ago at this point about trying to make this work with Accesstuner race and an ap map. Haven't given up yet but also haven't tested. If I get the time and balls to test, I'll let everyone know what I did
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Old 01-19-2017, 02:44 AM   #277
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Quote:
Originally Posted by AudioRuso View Post
I would like to add another bit of knowledge:
Even higher boost levels can be achieved by adding a 3 port solenoid that will either bleed off the boost source from the waste gate back to intake when Anti-Lag is active OR to the top port on an EWG setup to keep the Wastegate shut while Spooling with Anti-Lag engaged.
Bear with me on this, I'm making this up as I go along...

My ROM has a compensation table that modifies initial and max WGDC based on IAT. If your does too, can you set the coldest-IAT cells to a very high value, and thus hold the wastegate closed? I'm not sure this would work with the stock boost control solenoid, but I think it should work with an aftermarket BCS.
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Old 01-19-2017, 03:22 AM   #278
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Quote:
Originally Posted by NSFW View Post
Bear with me on this, I'm making this up as I go along...

My ROM has a compensation table that modifies initial and max WGDC based on IAT. If your does too, can you set the coldest-IAT cells to a very high value, and thus hold the wastegate closed? I'm not sure this would work with the stock boost control solenoid, but I think it should work with an aftermarket BCS.
^^ killer thinking! Much cleaner solution! If these do exist for my year, this would absolutely work on both stock and aftermarket boost control and wastegate setups including external wastegates. I say this because if you simply unplug the vac line from any wastegate, you will overboost.

*opens up RomRaider*

Yes, on my year (this will apply 08-14, and likely 06-07 too) the table exists and by the looks of it will work just as expected.

Thanks for the tip! Will try and report soon!

Although I gotta admit I'm a little bummed to not get to insert a solenoid and move air around :-P
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Old 01-24-2017, 03:24 PM   #279
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I'm reporting back on this idea. Although it was amazing in concept, it doesn't work in practice. I think I will go back to the solenoid idea (if I do at all).

The reason is that the WGDC IAT Compensation is a percentage value, however it targets cells in the WGDC map which have almost zero WGDC values so even adding a 99% compensation (max) has pretty much zero effect on holding the wastegate shut.

I thought about slightly raising the WGDC there since it might not have much effect on the car anyway since without anti-lag on the car would not be able build boost in those cells anyway, but it is being more of a hack than I would like it to be so I think I'll let it be. Also I think it's possible to trigger those cells during rapid changes in driving where perhaps it could contribute to strange boost fluctuations as the wastegate momentarily opens and closes during those weird cells. Any thoughts?
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Old 01-25-2017, 12:35 AM   #280
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What's the RPM and throttle percentage in the cells where you use the anti-lag?

I'm guessing that if you're in an area where WGDC is near zero, then adding WGDC won't change anything when anti-lag is not on, since target boost in that area is probably way below what the wastegate spring provides on its own, and the airflow + EGT is probably too low to build more than wastegate boost. But I'm not real confident in either of those assumptions.
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Old 04-07-2017, 11:16 AM   #281
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I have the wiring set up in my car. Trying to figure out the timing situation right now. By my math, I would need like -60* of timing.. That doesnt sound right. I am working with AccessTuner, but the values between that and romraider really shouldnt be different, should they? Does Cobb measure timing from a different spot? I am going to just try putting in the -27 value from the OP and see what happens. If this works, people with Accessports can have antilag on their cars!
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Old 04-07-2017, 11:34 AM   #282
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Originally Posted by martin028 View Post
I have the wiring set up in my car. Trying to figure out the timing situation right now. By my math, I would need like -60* of timing.. That doesnt sound right. I am working with AccessTuner, but the values between that and romraider really shouldnt be different, should they? Does Cobb measure timing from a different spot? I am going to just try putting in the -27 value from the OP and see what happens. If this works, people with Accessports can have antilag on their cars!
There is no timing difference between so and tactrix. To calculate mathematically you would have to take into account all other timing adjustments that the ecu applies, not just base timing. It is Probably easiest to do what you're doing now: try the -27 and monitor what the timing is with anti lag engaged. Then adjust accordingly.

Perepare for a lot of face grin. 😉👍
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Old 04-07-2017, 12:04 PM   #283
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I use approximately 20 deg of ignition retard on a standalone between 2000-5500 RPM quickly tapering off above and below my target RPM range. This is something that must be tuned (mine is not optimized) as you are affecting the flame front position in the exhaust manifold. Ideally, you want it further down the manifold so the expansion happens near the turbine wheel.

There are a lot of variables that go into anti-lag, including bypassed air, cylinder cutting, ignition retard, RPM, and throttle position. Passive (safety) variables include ECT and TIT (measured as EGT near turbine).

Good luck with that face grin... hope the turbo survives.
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Old 04-07-2017, 12:27 PM   #284
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Just curious to see if it will work really. I don't have any need of launching my car like that. Also, if the turbo does pop that means I have an excuse to tell my fiance that I need a weekend to swap in all the go fast parts from the car I wrecked
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Old 04-07-2017, 01:16 PM   #285
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Martin028,
I have had this working on my 06 Sti Via AP for a few years now. Funny i wanted to check out this thread years later and im happy to see its still going!

My setup was:
06 STi
AMRT60R
EWG and MBC
Cobb Speed Density
I was able to tune the IAT comp cells by lowering the adjacent cells Temp values enough to achieve my -40 target value.
Once this was accomplished i turned my AP on monitored Intake temp and held my button down and watched the "temperature" sure enough it read -40*
Then I started testing by logging my IAT & IGN timing to see where id end up by pulling timing out of the IAT comp table. started off slow but now it was building 20psi ~-16-17* iirc. I never launched it like this but i have done many rolling anti lag raced and its literatly INSANE. theres no chill. best way to describe it is, it feels like your launching from a dead stop-even tho your rolling.
Ive since changed my setup to my own CNC'd closed deck with manley turbo tuffs, big cams and a forward facing 69mm BW turbo and I am not worried about lighting off this turbo with the cobb 2-step and this hack.
Ill see if i can pull up my old tune and shed some light on it for you
hope you gets yours working soon!
-Cheers
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Old 04-07-2017, 02:19 PM   #286
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Hmm so right now I can get to - 17* when I push the button while in launch control mode, but it doesn't stay there for more than a second before returning to about 8* which I find weird. The max boost I could build was 9lbs, which isn't much of an increase from the 7 I get with Cobb's 2step
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Old 04-07-2017, 06:36 PM   #287
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Quote:
Originally Posted by martin028 View Post
Hmm so right now I can get to - 17* when I push the button while in launch control mode, but it doesn't stay there for more than a second before returning to about 8* which I find weird. The max boost I could build was 9lbs, which isn't much of an increase from the 7 I get with Cobb's 2step
Did you change the timing activation table?
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Old 04-07-2017, 06:44 PM   #288
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Did you change the timing activation table?
For Cobb the only two iat related tables are timing comp and min activation load, which I bumped down to 0.30 from the stock 0.60. I can't imagine during 2 step the load would drop below that and stay low enough for the timing to come back up and stay up.
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Old 04-07-2017, 07:54 PM   #289
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Originally Posted by martin028 View Post
For Cobb the only two iat related tables are timing comp and min activation load, which I bumped down to 0.30 from the stock 0.60. I can't imagine during 2 step the load would drop below that and stay low enough for the timing to come back up and stay up.
What kind of car? I looked up an accesstuner table description list and it has the table listed, but I'm sure different ones exist on different years/ecu types.

Ignition Timing Compensation (Intake Temp) Activation
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Old 04-07-2017, 08:30 PM   #290
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02 wrx

Yeah it has intake air temp ignition timing compensation, and iat compensation minimum engine load activation
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Old 04-07-2017, 09:01 PM   #291
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Iirc there is a ign retard max table
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Old 04-07-2017, 09:29 PM   #292
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Originally Posted by Nemesis_STI View Post
Iirc there is a ign retard max table
"Rev Limit (Fuel Cut) Ignition Timing Retard"? It was set at -4.somthin. Changed it to -24.96 (maximum allowed by ATR).

I'll give that a shot tomorrow.

Thanks for the heads up.
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Old 04-08-2017, 09:54 AM   #293
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Good luck bud
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Old 11-23-2017, 04:17 AM   #294
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2015+ WRX (FA20DIT) will this work? Any potential tuning issues?
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Old 02-02-2018, 09:40 AM   #295
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Hey guys,
Martin did you ever figure the tuning out on Cobb AP? I went out yesterday after reading the first 3 pages of the thread bought a switch went home opened my accesstuner and mines like yours only 2 tables for iat. I've got a 04 fxt auto with a vf39 and I can't build any boost off the line it's a dog. Any and all help would be appreciated!
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Old 04-09-2018, 11:27 PM   #296
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I am attempting to get this working with accestuner race (13wrx). What values need to be put in to the activation table specifically? I have no idea what to put in this table or where to put it as it's a 3D table . Any help would be appreciated. The A and B comp tables I'm good with though.
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Old 05-01-2018, 01:08 AM   #297
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Man, this was a painful thread to read. Started with interest and some talk, bunch of BS came pouring in where people don't understand that anti-lag can have a range of pedal movement based upon strategy, and then go into the typical land of the lost and fuzzy memories.

Anyway, looking forward to finally digging in on my ancient 16-bit ECU.
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Old 05-01-2018, 01:42 AM   #298
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Old 05-01-2018, 02:48 PM   #299
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Roll eyes at what? He's right, you know...
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Old 06-20-2018, 12:50 PM   #300
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Wow, I don't get on here much, but funny to see people still asking/using this 5yrs later.
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