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Old 03-03-2008, 06:49 PM   #1
e11ys
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Join Date: Dec 2004
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'02 Brodozer
'13 Golf TDI

Default FAQ sticky for us noobs?

I am just getting into tuning, and I wouldn't even think about doing any myself as of now (Tactrix cable and some logging is as far as I've gotten). However, I'd really like to start reading up on basic theory and start gathering the knowledge that is needed to get a good handle on the workings of the Subaru ECU (or any ECU for that matter). I know that skill comes with practice, but I also know that someone around here has links to some good information

Also, I realize that there is info scattered throughout the board as of now, but consolidating it in a sticky would be nice in order to make it easier to find, and keep thread-jacking to a minimum.

Is an FAQ in the works? Also, don't hesitate to post some links in here in the meantime. Thanks!

-E
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Old 03-03-2008, 07:31 PM   #2
fastnoypi
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nothing to see, i'm stock

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Old 03-03-2008, 08:12 PM   #3
e11ys
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Default

Thanks, I guess that's a start. I've seen that before...actually, I read that before I ever plugged the cable up. I guess what I'm looking for is more in depth information on step 3 "make tuning changes and save". I know the whole process of logging and flashing. I want some information on basic tuning ideas and principles...rules of thumb, general guidelines, dos and don'ts...that sort of thing. Stuff like "if you adjust this, it changes this, but make sure you also change this and this to compensate, etc. Maybe a tuners explanation of what parameters he makes changes to first. I know no one is going to divulge tuning secrets, but I think some one must have a write up somewhere on this sort of thing. All comments and information are welcome!
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Old 03-03-2008, 10:10 PM   #4
fastnoypi
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nothing to see, i'm stock

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im a complete noob in this area, but im trying to chip away too so i can at least have an intelligent conversation with the tuners on what im seeing in the logs.
Here's one that i came across on romraider that helps wrap my head around some really basic concepts http://www.romraider.com/RomRaider/H...iablesInteract

Id like to see some general guidelines too in one place, ie, how much approximate timing to pull when dropping octane levels, how much approximate fuel to pull out when going catless, etc.. ESPECIALLY the don'ts.. I wanna keep the explosions on the inside!
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Old 03-03-2008, 10:26 PM   #5
e11ys
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Quote:
Originally Posted by fastnoypi View Post
im a complete noob in this area, but im trying to chip away too so i can at least have an intelligent conversation with the tuners on what im seeing in the logs.
Here's one that i came across on romraider that helps wrap my head around some really basic concepts http://www.romraider.com/RomRaider/H...iablesInteract

Id like to see some general guidelines too in one place, ie, how much approximate timing to pull when dropping octane levels, how much approximate fuel to pull out when going catless, etc.. ESPECIALLY the don'ts.. I wanna keep the explosions on the inside!
Thanks again man, you're looking for the same info I am. I tell ya, I thought I was pretty well versed in Suby performance until I started poking around in here. Usually when I find something I don't know about my car, I read about it until I know it front to back. I realize tuning isn't quite like that...it's gonna take some hands on experience. Hopefully some guys that have been doing their own tuning for a while will speak up and offer some good tips and advice.

-E
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Old 03-04-2008, 10:01 AM   #6
savageblitz
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I'm in the same boat as you guys too. I think someone needs to get started on compiling such info. Basically, what we need is a methodology (with detailed how-to's and numbers/targets to hit or tune as well as warning/limits).

So far, most information that has been compiled have been on how to use software, etc. But I think we need to take it to the next level. (maybe we can work something out)

Anyway, I've asked something similiar a few backs and there has been some replies to my thread:
http://forums.nasioc.com/forums/show....php?t=1436043

(see Phatron's replies)


Here's another good thread (in the beginning at least): http://forums.nasioc.com/forums/show...1429043&page=2
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Old 03-04-2008, 10:08 PM   #7
jibber
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Everyone always replies with go read a book on engine management tuning. Honestly if you can't look at the tuneable areas available in romraider and instantly understand them, or open the notes and understand them, some further reading on how to tune EFI systems is in order.

There is so much theory and personal preferance that what one tuner will tune as acceptable to the next may be completely different. I am newer to open source tuning but have read for literally years and have helped install and tune complete stand alones. I have also done much more basic tuning on piggy back systems.

I prefer to stay as safe as possible. I would be happy to leave some power on the table. I generally start by pulling timing back and then work the boost map until I get the boost where I want it. Once the boost is set I then go to work on the fuel map. Once fuel is set I start bumping up the timing until I am happy.

To do this you MUST have a wide band, and you must be logging in some form for knock. You will have to come to some number that you are comfortable with for a max afr and acceptable knock. (if you believe any knock is acceptable)

Good luck and if you have any questions PM me, I will answer what I can and tell you when I don't know.

Josh
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Old 03-04-2008, 11:24 PM   #8
e11ys
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'13 Golf TDI

Default

Quote:
Originally Posted by jibber View Post
Everyone always replies with go read a book on engine management tuning. Honestly if you can't look at the tuneable areas available in romraider and instantly understand them, or open the notes and understand them, some further reading on how to tune EFI systems is in order.

There is so much theory and personal preferance that what one tuner will tune as acceptable to the next may be completely different. I am newer to open source tuning but have read for literally years and have helped install and tune complete stand alones. I have also done much more basic tuning on piggy back systems.

I prefer to stay as safe as possible. I would be happy to leave some power on the table. I generally start by pulling timing back and then work the boost map until I get the boost where I want it. Once the boost is set I then go to work on the fuel map. Once fuel is set I start bumping up the timing until I am happy.

To do this you MUST have a wide band, and you must be logging in some form for knock. You will have to come to some number that you are comfortable with for a max afr and acceptable knock. (if you believe any knock is acceptable)

Good luck and if you have any questions PM me, I will answer what I can and tell you when I don't know.

Josh
Josh-

Thanks a ton for that advice, that's exactly what I'm looking for. I do understand what the parameters mean for the most part, as I've studied the way these engines work for a while. However, knowing what they mean and being able to adjust them with confidence are two different things, and in order to figure out what I need to study up on, I'd like to see how other people are going about it. That was a great post, thanks again!

-E
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Old 03-05-2008, 03:20 AM   #9
jibber
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98 SF5 some mods
01 allroad

Default

Glad to help. If you understand the software and what the tables do, go have a look at a bunch of roms that are from similar year cars/mods on Romraider.

Just keep in mind that your set up may differ greatly from what works for another car/motor/setup.
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Old 03-09-2008, 11:56 PM   #10
Mikel
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Wirelessly posted (Treo 750: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 6.12) UP.Link/6.3.0.0.0)

I'm actually pretty well versed in engine management, I'd just like a faq outlining the different Subie specific solutions.
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