Tuning, OBD-II Style
08-16-2007, 09:52 AM
#1
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Tuning, OBD-II Style
i have access to a Snap-on OBD-II scanner and i swear that i remember seeing AFR on the tool. i have used it before and i remember there being graphs of AFR (13.0-15.0 at the time). now since ive picked up a VAFC-II, would it be possible to tune this way? or would it be too inaccurate since its still with a narrowband? planning to dynotune soon but i was hoping i could get it close before that so that it could be really fine tuned at the dyno. what do you think?
PS: the scanner is one of the absolute newest models, my gf's dad is a snap-on salesman so i have access to some pretty new and cool stuff, which i just realized i can use to my advantage
PS: the scanner is one of the absolute newest models, my gf's dad is a snap-on salesman so i have access to some pretty new and cool stuff, which i just realized i can use to my advantage
08-16-2007, 09:56 AM
#2
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It would deffinitly be inacurate since it's just working off the narrowband o2's, but you already new that, I plan to do the same thing before I go to the dyno though, def. not a bad idea at all to give it a rough tune before you go, it will also help you to be able to program the vafc-II quicker
08-16-2007, 10:07 AM
#3
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Originally Posted by KRRZ350
It would deffinitly be inacurate since it's just working off the narrowband o2's, but you already new that, I plan to do the same thing before I go to the dyno though, def. not a bad idea at all to give it a rough tune before you go, it will also help you to be able to program the vafc-II quicker
08-16-2007, 10:26 AM
#6
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Originally Posted by nismology
Unless you want to tune between 14.5:1 and 14.9:1 AFR the narrowband o2 signals are completely worthless to you.
08-16-2007, 10:28 AM
#7
Everything below 14:7:1 will just show up as a rich reading. Everything above that will show up as a lean reading. In terms of voltage, anything below stoich will show as .1v, and anything above will be .9v. That's why I like to call them rich/lean sensors because they have no clue what the actual AFR is.
08-16-2007, 10:46 AM
#9
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Originally Posted by nismology
That's why I like to call them rich/lean sensors because they have no clue what the actual AFR is.
PS: as for connecting the VAFC, im not the best at soldering, so i was thinking about using t-tap connectors, like these: T-tap. Is that a bad idea?
08-16-2007, 12:04 PM
#11
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Originally Posted by NmexMAX
Also, 05+ A334's also have WB's, Just FYI.
05+ g/z on the other hand...
Originally Posted by NmexMAX
I had never soldered in my life, learn something, solder it.
PS: i know how to solder, i just dont have a soldering gun
08-16-2007, 12:05 PM
#12
08-16-2007, 02:34 PM
#13
Originally Posted by DasYears
PS: i know how to solder, i just dont have a soldering gun
Oh, and try soldering with and w/o flux, and see the difference.
Good luck!
08-16-2007, 03:15 PM
#14
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Originally Posted by MOHFpro90
Get a 15/30W iron from Radioshack. Theyre under $10, just trust me, GET FLUX TOO! Especially with soldering wires together. I generally use 30W, Flux, Solder(0.032 thickness), and a suction bulb to remove solder. That's my arsenel.
. glad to know its cheap...will be soldering now.
08-16-2007, 06:44 PM
#15
Irons are cheap. Guns, I think are like $30. They make 40 W irons, which are better for larger guage wire, say 18 or so.
I used 255 strand 18G wire in RC cars, I had to pull out my dad's gun in order to heat it up correctly. With the iron, the heat would dissipate through the plug and down the wire without melting the large ammount of solder needed.
For what you're doin, I would suggest something like this: http://www.radioshack.com/product/in...entPage=search
Check them out, you could really go with anything. If you want more help, shoot me a pm.
http://www.radioshack.com/search/ind...%3BDesoldering
I used 255 strand 18G wire in RC cars, I had to pull out my dad's gun in order to heat it up correctly. With the iron, the heat would dissipate through the plug and down the wire without melting the large ammount of solder needed.
For what you're doin, I would suggest something like this: http://www.radioshack.com/product/in...entPage=search
Check them out, you could really go with anything. If you want more help, shoot me a pm.
http://www.radioshack.com/search/ind...%3BDesoldering
08-16-2007, 07:09 PM
#16
08-17-2007, 06:27 AM
#17
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Originally Posted by MOHFpro90
For what you're doin, I would suggest something like this: http://www.radioshack.com/product/in...entPage=search
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