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Old 06-13-2008, 08:30 PM   #1 (permalink)
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Ok so now that i have installed my neo i am going to begin tuning with it withing the next couple of days and I had a question. What are the afrs supposed to be reading when driving normal because right now theyre bouncing around from like 14-15. Is this good or should they be different. thanks
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Old 06-13-2008, 11:43 PM   #2 (permalink)
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in closed loop mode i.e. idle/cruising they should be fluctuating between 14.4-15.2. The actual target the car is trying to get is 14.7, so as long as you stay around that mark you're ok. In WOT situations, on pump gas it's good to stay in the 11.2-11.8 range and you can push it as high as 12.5 on race gas or methanol. I wouldn't venture too much higher than that or you're risking melting down some pistons.
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Old 06-14-2008, 11:49 PM   #3 (permalink)
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Quote: Originally Posted by Turbocruiser13 View Post
in closed loop mode i.e. idle/cruising they should be fluctuating between 14.4-15.2. The actual target the car is trying to get is 14.7, so as long as you stay around that mark you're ok. In WOT situations, on pump gas it's good to stay in the 11.2-11.8 range and you can push it as high as 12.5 on race gas or methanol. I wouldn't venture too much higher than that or you're risking melting down some pistons.

now what about at redline cause right now it falls of to like a high 10 when it hits redling but other than that the whole time it stays in the 11s?
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Old 06-15-2008, 01:46 AM   #4 (permalink)
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That's pretty decent really...and that's due to the fact that your boost is dropping off a little by redline, so you're getting richer. You can pull away a little bit more fuel up top, but don't go too crazy with it. The max I'd pull from 4500-redline would be 14-15%. Any more than that and you'll start hurting timing and killing performance.
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Old 06-15-2008, 10:33 PM   #5 (permalink)
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Quote: Originally Posted by Turbocruiser13 View Post
That's pretty decent really...and that's due to the fact that your boost is dropping off a little by redline, so you're getting richer. You can pull away a little bit more fuel up top, but don't go too crazy with it. The max I'd pull from 4500-redline would be 14-15%. Any more than that and you'll start hurting timing and killing performance.

yea i think right now im pulling like 12-13% but I'll try the 14-15 and see how that works. As soon as I install my fuel return line ill turn up the boost and re tune it.
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Old 06-16-2008, 01:40 AM   #6 (permalink)
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the nice part about fuel returnlines is once you get a good afr where you want it, you can simply raise the boost up then bring up your fuel pressure a few psi as well and you won't have to retune...somethin to think about.
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Old 06-16-2008, 12:54 PM   #7 (permalink)
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Quote: Originally Posted by Turbocruiser13 View Post
the nice part about fuel returnlines is once you get a good afr where you want it, you can simply raise the boost up then bring up your fuel pressure a few psi as well and you won't have to retune...somethin to think about.

yea that does make pretty good sense. thanks for the help and the info man. Ill let you know how it goes once I install the returnline. Should be on by wednsday because thats my next day off.
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