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Tuning & Engine Management Engine Management, EGT temps, timing, wideband, datalogging, fuel trims, etc.

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Old 12-05-2005, 06:29 PM   #16 (permalink)
 
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I did a log today made very minor changes, My reading are sometimes inconsistent. Sometimes I would get a perfect pull with absolutely no timing pulled, and the next day I do a pull on the same setting I might get SLIGHT knock from the spots you see below.


RPM TIM O2 3rd gear Pull 05 evo MR w/catback/mbc
3242 6 .92
3347 4 .92
3449 3 .94
3609 2 .94
3734 5 .94
3898 5 .94
4035 6 .94
4171 6 .94
4308 6 .94
4437 7 .94
4574 7 .94_____ This is what Im talking about, Timing gets pulled by 1 while advancing
4726 6 .94 200 rpm, Im not sure If THIS is considered KNOCK???
4863 7 .94_____
4984 8 .94 when I added fuel back, it did more of 7-6-7-6 thing, so I took it
5101 8 .94 back out , Again sometimes its perfect sometimes is not
5246 8 .94 If I lefted like this would it be bad for my engine? is this considered
5390 8 .94 Knock??
5562 8 .94
5621 8 .96 any ideas???
5742 9 .94
5878 10 .94
5992 12 .94
6109 13 .94
6214 14 .94
6324 15 .94
6441 15 .96
6539 16 .96
6656 16 .96
6773 18 .96
6886 19 .94
6976 21 .96
7082 21 .96
7175 22 .96
7261 22 .96
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Old 12-05-2005, 07:38 PM   #17 (permalink)
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Is this at 22 psi by any chance? That looks exactly like what I was logging trying 22 psi, and I was mixing in 2 gallons of 100 oct. for approx 92 oct. Same exact timing too between 4000-5500 RPM's.
If the boost is that high, or higher, drop it 1 psi and lean it out to .92-.93v. See what happens.



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Old 12-06-2005, 03:03 PM   #18 (permalink)
 
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My MBC is set at 1.5 which i think is around 21 psi,maybe more closer to 22psi but in 3rd it goes up to like 1.4, only 1.5 in top gears. Tappers to around 1.2 by redline, (which sucks but still holds better than stock.)

what does the 1 psi have to do with that part of the RPM range anyway, I would like to keep my boost at the same level, it seems to be pretty stable even with the 30F weather these days.

another question, I know Im suppose to shoot for .92-.94, a while back when I tried to get .94 across the board, I had my SAFC II set highest at like -13% which is kind of high I think , after reading all the warning w/o wideband Im kind of reluctant of keeping it like that.

is .94 really safe I dont want to melt my pistons or something by leaning it out too much,plus the timing seems to be climing good up top why lean it out more???

also is higher timing better? like 22-23 by 7K or is that more dangerous?
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Old 12-07-2005, 11:12 AM   #19 (permalink)
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Quote:
Originally Posted by evo mr fu
My MBC is set at 1.5 which i think is around 21 psi,maybe more closer to 22psi but in 3rd it goes up to like 1.4, only 1.5 in top gears. Tappers to around 1.2 by redline, (which sucks but still holds better than stock.)
That's alot of taper. How far is your MBC from the wastegate?

Quote:
Originally Posted by evo mr fu
another question, I know Im suppose to shoot for .92-.94, a while back when I tried to get .94 across the board, I had my SAFC II set highest at like -13% which is kind of high I think , after reading all the warning w/o wideband Im kind of reluctant of keeping it like that.
is .94 really safe I dont want to melt my pistons or something by leaning it out too much,plus the timing seems to be climing good up top why lean it out more???
Your fine. Our knock sensors will pick up detonation and you'll see pulled timing before a WB tells you somethings wrong.

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Originally Posted by evo mr fu
also is higher timing better? like 22-23 by 7K or is that more dangerous?
Higher timing can give you more power, but it also increases the chances of knocking, so it's a trade off. I shoot for 20* at 7K, 22-23* is fine, and people who run 720's are getting 25-26*. Run what is best for your set up and what your car likes best.



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Old 12-07-2005, 02:05 PM   #20 (permalink)
 
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thanks for the responses, I had my MBC tapped in bov, I followed instructions on evolutionm.net, http://forums.evolutionm.net/showthr...ost+controller

Im not really sure why it tappers so much, but it still hold to almost redline.....in 3rd it will taper first to like 1.3 then 1.2
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Old 12-07-2005, 02:29 PM   #21 (permalink)
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Quote:
Originally Posted by evo mr fu
thanks for the responses, I had my MBC tapped in bov
T'ed into that line is fine, it's the accual closeness of the MBC's outlet hose to the wastegate accuator. The closer the MBC is to the accuator, the better it will work. I try and keep it around 12 inches, but it can make for difficult mounting and adjusting.



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Old 01-03-2006, 06:23 AM   #22 (permalink)
 
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where did you mount your MBC, my is on the battery, I wish I knew a more stealthy place So I can hide from the dealer for regular maintance? any ideas?
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Old 01-04-2006, 02:48 PM   #23 (permalink)
 
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Quote:
Originally Posted by turbolarry
You can still bring it down a little with just the logger. Watch the timing for signs of knock/pulled timing. That will show up before any damage or dangerous lean conditions.. I wish I had 93 at the pump.
He's got good timing up top. I think he should up the boost 1 psi or so. He's not knocking or anything. And if he sees knock then go back down 1 psi, then Play with the AFC and take some fuel out from 6k-7k.
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Old 01-04-2006, 06:03 PM   #24 (permalink)
 
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Quote:
Originally Posted by evo8kiko
He's got good timing up top. I think he should up the boost 1 psi or so. He's not knocking or anything. And if he sees knock then go back down 1 psi, then Play with the AFC and take some fuel out from 6k-7k.
The timing is good, because of how rich he is. It is not proper to just keep upping the boost just because your timing is good. If you are running high boost while very rich, the two conditions just counteract one another. It's best to get the AFRs in the proper range and run as much boost as you can at that AFR without affecting timing.





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Old 01-04-2006, 07:54 PM   #25 (permalink)
 
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AAAWW WELL, WHAT'S 1 PSI GONNA DO? HE'S NOT RUNNIN' 91 CRAP GAS. Does he have an egt? Safety margin is 1550-1650 Farenheit.
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Old 01-04-2006, 08:11 PM   #26 (permalink)
 
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AAAWW WELL, WHAT'S 1 PSI GONNA DO? HE'S NOT RUNNIN' 91 CRAP GAS. Does he have an egt? Safety margin is 1550-1650 Farenheit.
1 psi can mean the difference between knocking and not knocking. It doesn't matter that we're not using 91oct. It's all relative, so you can't take boost levels in a vaccuum.

EGT is not important here either. That will be caused by being rich and having low timing.





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