05-29-2013, 12:33 AM | #15 |
Seeking 9s on M6...
Drives: 2012 2SS/RS LS3 aka "BlackWidow" Join Date: May 2012
Location: Houston, TX
Posts: 397
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Thanks. I pm'd him.
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05-29-2013, 08:44 AM | #16 | |
Drives: 2013 ZL1 Join Date: Oct 2012
Location: Dubai
Posts: 757
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Quote:
Well I have an idea in mind already based on the print screens but cant be too sure, can you send me the log and the file by email? I want the log from where you got the initial printscreen from. Also, to get correct boost readings always make sure you subtract the Barometric pressure in PSI from MAP PSI, this is the only correct way to do it. Using a static number such as 14.7 or 14.5 to estimate barometric pressure may only be accurate 10% of the time. But thats not the problem. Ill send you my email address as a PM
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1150bhp Whipple 4.0 Supercharged 427ci Camaro ZL1 |
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05-29-2013, 12:07 PM | #17 | |
Drives: 98 Z28 Join Date: Mar 2013
Location: Deerfield Beach, FL
Posts: 79
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Quote:
Would be nice to see throttle blade position and pedal position to see what you are actually telling it to do vs what it's doing. What happens if you go WOT in say 3rd or 4th gear, let off completely around the top of the gear and stab it again without shifting really quick? Also, what happens if you stab it from a high 3rd or 4th (somewhere that you get traction) gear roll? Also, rescale the speed and rpm in order to show more drastic changes in the graph. Also, does this car have cats or cutouts? Last edited by carlos@redline-motorsport; 05-29-2013 at 12:22 PM. |
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05-29-2013, 12:50 PM | #18 | |
Drives: 2013 ZL1 Join Date: Oct 2012
Location: Dubai
Posts: 757
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Quote:
I do have some weird ideas however especially since MAF frequency isnt as high as it should be when the spike occurs.
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1150bhp Whipple 4.0 Supercharged 427ci Camaro ZL1 |
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05-29-2013, 01:29 PM | #19 | ||
Seeking 9s on M6...
Drives: 2012 2SS/RS LS3 aka "BlackWidow" Join Date: May 2012
Location: Houston, TX
Posts: 397
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Quote:
Quote:
I am hopefully Ayousef finds something, but i like some of your suggestions...I'll see if getting off the throttle and punching it will reproduce it. I'll also see if i can add logging for throttle and pedal positions. Thanks, Pat
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05-29-2013, 01:30 PM | #20 |
Drives: where to begin... Join Date: May 2010
Location: MiSSiSSiPPi
Posts: 34
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Has this calibration been scaled? You might have missed something during scaling...
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05-29-2013, 03:19 PM | #21 | |
Drives: 98 Z28 Join Date: Mar 2013
Location: Deerfield Beach, FL
Posts: 79
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Quote:
Like I said, hard to figure out what's going on without seeing what position the throttle blade is at. This is why I was asking him about quickly interrupting a pull pre-gear shift. Also, because the PD blowers make instant boost and it's not really dependent on RPM, the only thing that would cause boost to legitimately go up would be a restriction down stream. That is, if it's not the MAP showing pressure backed up behind the throttle blade and the bypass isn't reacting fast enough, as the MAF doesn't seem to be on the same page, like you just mentioned. |
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05-29-2013, 03:44 PM | #22 |
Drives: 454 LS7 Camaro SS Join Date: Jun 2009
Location: Houston
Posts: 380
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Ive seen boost spike on CTS-V's when you hit a lean spot.
Id bet your tune is off. If you look at your logs the 02 voltage is extremely lean when the boost spike occurs! |
05-29-2013, 03:47 PM | #23 |
Drives: 454 LS7 Camaro SS Join Date: Jun 2009
Location: Houston
Posts: 380
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Also are you 2.5 bar SD? Or OL MAF? CLMAF.. Details buddy details!
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05-29-2013, 04:49 PM | #24 | |
Drives: 2013 ZL1 Join Date: Oct 2012
Location: Dubai
Posts: 757
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Quote:
hes running a MAF closed loop tune
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1150bhp Whipple 4.0 Supercharged 427ci Camaro ZL1 |
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05-29-2013, 05:30 PM | #25 |
Seeking 9s on M6...
Drives: 2012 2SS/RS LS3 aka "BlackWidow" Join Date: May 2012
Location: Houston, TX
Posts: 397
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3 bar ZR1 MAP. Stock MAF.
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05-30-2013, 01:21 AM | #26 |
Seeking 9s on M6...
Drives: 2012 2SS/RS LS3 aka "BlackWidow" Join Date: May 2012
Location: Houston, TX
Posts: 397
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My O2 voltage is really lean of every gear shift (w/or w/o boost spike)...is that not normal?
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05-30-2013, 09:41 AM | #27 |
Drives: 454 LS7 Camaro SS Join Date: Jun 2009
Location: Houston
Posts: 380
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Im not a fan of closed loop maf tunes.
If you must tune maf (ugh!) open loop is the way to go. Id take advantage of the ZR1 map and go SD! |
05-30-2013, 01:49 PM | #28 |
Seeking 9s on M6...
Drives: 2012 2SS/RS LS3 aka "BlackWidow" Join Date: May 2012
Location: Houston, TX
Posts: 397
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Already discussing that w my tune, just haven't made the time to convert it yet. Likely in the near future.
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