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Peak Torque knock... before, during and after

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Old Jun 9, 2010 | 08:53 AM
  #46  
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So basically what your saying is that now that I am running e85, 14.7 AFR is actually 9.765 AFR? Stoich for both gas and e85 are 1 so therefore the 14.7 AFR readout on my LC-1 is really replacing the 9.765 stoich number due to the calculation in Evoscan and the fact that both gas and e85 are 1 Lambda for stoich...?
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Old Jun 9, 2010 | 02:00 PM
  #47  
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Bingo,
So if you tune for 11.5:1 or 12:1 at full throttle according to the LC-1, it is in fact much more rich with E85... but that's ok because as far as lambda goes, that's where it needs to be. This is why you don't get as good of fuel economy with E85 even though A/F ratios seem close. On a side note, you have your injectors sized and proper latencies set for E85 correct?
Dan
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Old Jun 9, 2010 | 04:04 PM
  #48  
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Originally Posted by rawkus
Bingo,
So if you tune for 11.5:1 or 12:1 at full throttle according to the LC-1, it is in fact much more rich with E85... but that's ok because as far as lambda goes, that's where it needs to be. This is why you don't get as good of fuel economy with E85 even though A/F ratios seem close. On a side note, you have your injectors sized and proper latencies set for E85 correct?
Dan
Yes I do, partly.

I am using FIC 1050 injectors.

Scaling is 713cc for E85 thus far. 1083cc for 91oct.

Latencies are:

4.69 4.464
7.03 3.264
9.38 1.800
11.72 1.104
14.06 0.864
16.41 0.600
18.68 0.432

and my Low LTFT is within +/- 1.0%. Thats being generous, right now i am seeing +/- .5 %. Still working on the Mid LTFT as I haven't had anytime to do it yet. But I imagine since I have my LTFT Low pretty solid that the Mid LTFT will come in close as well. I will report back on this..

Last edited by jrhonda; Jun 24, 2010 at 05:12 PM.
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Old Jun 10, 2010 | 05:18 AM
  #49  
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From: Lafayette, IN
Cool, sounds like you are on the right path.
Dan
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Old Jun 14, 2010 | 03:54 PM
  #50  
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Hello


On Evo8 with 9 turbo plan to run on european RON 98 and peak boost 27psi what do you think Can I try to give 3-4 timing advance 310load 3500rpm ?! Or it is to much for that load ( boost ). what is the max boost what the 9 turbo can hold @ redline with 3 port gm solenoid ?
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Old Jun 14, 2010 | 05:04 PM
  #51  
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It's very hard to tell you how much timing you'll be able to run, there are so many variables to consider it's basically impossible. Your car may be able to run a bit more timing than someone else's, or it may be the opposite. The only way to know is to try it; see how much timing you can run until it knocks, then back it down a bit to give yourself a safety net.
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