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Old 01-30-2020, 11:13 PM   #26
NighthawkSTI
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how are the drop in side feed quality these days??????? They seem to available from stock flow all the way up to 1000 and 3000. Seen just as many good reports back as bad?
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Old 01-31-2020, 03:53 PM   #27
mrsaturn7085
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Top feed is better and easy to convert.

Additional injector controllers are silly in this day and age. Just get a standalone once 4 injectors aren't enough. A good tuner should be able to make use of 4 injectors for a LONG time.
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Old 02-03-2020, 08:41 PM   #28
BurninSTI
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Well... time for a new update, been busy but made some time to tune for the higher fuel pressure, this time adjusting tables in the accesstuner. What I discovered- major discrepancies between the cobb and stock maps, some changes seemed to make no sense at all... lol. Anyways, was working on the stock map adjusted latency with this cool excel tool another guy made for 60 psi base fuel pressure and transferred the maf scaling from the stage 3 map (assuming it must be compensating for a tbe as required in their stage 3). It runs absolutely amazing now. I did notice that cobb limits the af learning at 35% while the stock tune is 50%. Boost is extremely steady and can give it full throttle without overboosting into the 20's. It always settles down around 15-16. Stranger yet is that I'm running the stock boost controller which supposedly sucks. Fbkc maxes out at 1.4 no matter how much I abused the throttle on the freeway‐‐---------------
Problem: mentally tapped out today and need tips on what to adjust to bring my af learning to a reasonable number at idle and closed loop, dont want my open loop trims to change. Currently its maxing out at -35. Will this change my open loop fuel trims?
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Old 02-03-2020, 09:09 PM   #29
viper_crazy
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Quote:
Originally Posted by BurninSTI View Post
Problem: mentally tapped out today and need tips on what to adjust to bring my af learning to a reasonable number at idle and closed loop, dont want my open loop trims to change. Currently its maxing out at -35. Will this change my open loop fuel trims?
Are you sure the MAF scaling is exact? Is your MAF known to be in good order? Are you tuning with a wideband? If so, you can do your own MAF scaling. It'll take a bit of time and a bunch of logs but "One Man's way of scaling a MAF" I've linked below. At the very least, it may be worth double checking.

https://forums.nasioc.com/forums/sho....php?t=1427448
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Old 02-03-2020, 09:25 PM   #30
BurninSTI
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Thanks for the link, very good info there... I'm not 100% sure the maf is good but I am willing to guess that it's alright, the car is at 40k. No wideband right now but probably in the near future. Will probably do some logging tomorrow along with some screwing with the maf/latency/scaling tables... thinking scaling might need adjusted as well to compensate for the higher flow. Here's some math for the new flowrate I'm using

New Injector Scaling

4813 stock for stoich @ 43.5 psi
5653 @ 60 psi

4813/5653 = .8514

.8514*4813 = 4097.7882 injector flowrate scaled down for ~ 15% increase in flow

Last edited by BurninSTI; 02-03-2020 at 09:41 PM.
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Old 02-04-2020, 01:36 AM   #31
siete
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You were using stock map from Cobb on the AP for tuning?

I have heard the stock boost control is pretty good for the stock turbo. I have no intention on changing it for now.
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Old 02-04-2020, 08:45 AM   #32
Barge
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Low load fueling is all MAF and latency. Small latency changes have a pretty large effect at low loads.
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Old 02-04-2020, 08:59 AM   #33
BurninSTI
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Yeah, it comes with access tuner. It really seems to be on point from the factory. I was getting ready to port the wastegate, doesn't seem needed at all now. ***********UPDATE***************
I lowered the fuel pressure down to 50 PSI and rescaled the injectors and latency values for lower fuel pressure. Car was running excellent but was getting a hammering sound from the fuel lines. Now it runs the same and does not hammer. Here's a datalog for any naysayers that the stock tune in general is not good. (of course needs some very minor adjustments, not zeroing out of tables and canceling afr learnins'). Also all this flim-flam about boost creep seems to be a direct result of the zeroing of tables and requesting unrealistic torque numbers. I guess its fine if you're running an external wastegate, but why set up paying customers for mechanical failure. Extremely glad I decided to jump into ecu tuning, at first it seems difficult but after working on it for a few hours it becomes very straightforward. I just want to know wth was the point of zeroing out tables, especially cylinder 4 fueling compensations... duuh I'm don't know why my wingland faiwed I was wunnin stae 2 tune fom duh tunow… (tuner) its because you didn't buy xyz parts for $1800 or a protune.

Something to note, I left the DAM reset at .5 vs starting it at 1 and it did increment to 1 over the course of a short drive.

https://ibb.co/VvPg8Yt

Last edited by BurninSTI; 02-04-2020 at 09:23 AM.
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