Let's see your fully tuned timing maps
Jun 23, 2012, 07:00 PM
#1638
Not sure there is much anyone can recommend. A lot of factors go into determining the most appropriate timing. However, if you're seeing as many as 8-9 counts and its not phantom knock, then its time to take out a degree or two of timing in that rpm and load range.
Jun 23, 2012, 07:30 PM
#1639
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i think you should hold off on anymore changes until you get afr's.
one tip i learned...especially if you were tuned by a shop, would be to check how close the high and low octane maps are.
one tip i learned...especially if you were tuned by a shop, would be to check how close the high and low octane maps are.
Jun 23, 2012, 08:07 PM
#1640
mrfred, I am aware ever car is different. All 3 logs showed knock in the same load and rpm range. I guess my other question would be, is 12* - 14* up top too much for an afr of 11.7 at redline on a conservative road course tune? (pulls were 3rd gear)
killer, I have looked and the high and low octane maps are fairly close. I would assume that this would create a problem when knock occurs and there is not enough fuel to compensate in the low octane map.
killer, I have looked and the high and low octane maps are fairly close. I would assume that this would create a problem when knock occurs and there is not enough fuel to compensate in the low octane map.
Jun 23, 2012, 08:46 PM
#1641
mrfred, I am aware ever car is different. All 3 logs showed knock in the same load and rpm range. I guess my other question would be, is 12* - 14* up top too much for an afr of 11.7 at redline on a conservative road course tune? (pulls were 3rd gear)
killer, I have looked and the high and low octane maps are fairly close. I would assume that this would create a problem when knock occurs and there is not enough fuel to compensate in the low octane map.
killer, I have looked and the high and low octane maps are fairly close. I would assume that this would create a problem when knock occurs and there is not enough fuel to compensate in the low octane map.
Jun 23, 2012, 09:09 PM
#1642
For the road course I would richen it to low 11's at redline. For my street tune I keep it around 11.6-5 throughout the rev range since EGT doesn't really come into play for a couple short pulls, but for a 20 minute track session is surely does.
Jun 23, 2012, 09:42 PM
#1643
Thank you gentlemen. I will adjust accordingly. Yes this is 93 octane.
This is one of the reasons why I am learning to tune myself. The shop that tuned it said it was a conservative road course tune, which as I pushed the car harder it seemed to feel weird. Sad though, as the shop is very active in track days.
This is one of the reasons why I am learning to tune myself. The shop that tuned it said it was a conservative road course tune, which as I pushed the car harder it seemed to feel weird. Sad though, as the shop is very active in track days.
Last edited by ReaperX; Jun 24, 2012 at 09:56 AM.
Jun 24, 2012, 09:04 AM
#1644
I'm running a bbk full and 264/272 cams on an 8, and was unable to run anymore than 11-12 degrees up top on a road race setup at about 20-21psi, and have it be consistent. If I ventured over 11.4ish afr up top it would start to knock towards the end of my session (30 min runs) as well.
I can run 13-14 on the street fine at 24 psi. Sad part is that I found out the hardway that 14 was too much...gotta do a headgasket now
Barely saw any knock lights too...
I can run 13-14 on the street fine at 24 psi. Sad part is that I found out the hardway that 14 was too much...gotta do a headgasket now
Barely saw any knock lights too...
Jun 25, 2012, 04:31 PM
#1645
Can you guys give me an opinion on this timing map I just finished adjusting prior to loading it to the car. Background story for the new map:
I had gone to a dyno day last month and logged the car during the pulls. I had done a few logs here and there, but with the warranty about up (thank you c****x) I felt it was time to actually start learning and analyze the data from the logs. Plus.... I had just installed a MAF adapter w/ a Perrin filter and wanted to see what affects it had on the car since they say it can be run w/o altering the tune (which I now know isn't entirely accurate and I have since went back to the stock air box until I can get a logable wideband, prosport atm).
During the pulls the car was knocking above 7k. Not that I go over 7k much, if at all, during my trips to the track. The first pull had 4 counts from 7300 - 7500. The second pull had 8-9 counts from 6900 - 7500. Pull 3 had 6-7 counts from 7000 - 7500. With the filter the boost also increased from 5000 on, spiked 23psi then creeped to 24psi and tapered to rev limit. So I knew I had to richen up the fuel map up top.
What I did not realize is the amount of timing up top. In the previous map it was running 12*-14* of timing, which IMO is a little agressive for a "safe road course tune."
Thank you for your opinions.
I had gone to a dyno day last month and logged the car during the pulls. I had done a few logs here and there, but with the warranty about up (thank you c****x) I felt it was time to actually start learning and analyze the data from the logs. Plus.... I had just installed a MAF adapter w/ a Perrin filter and wanted to see what affects it had on the car since they say it can be run w/o altering the tune (which I now know isn't entirely accurate and I have since went back to the stock air box until I can get a logable wideband, prosport atm).
During the pulls the car was knocking above 7k. Not that I go over 7k much, if at all, during my trips to the track. The first pull had 4 counts from 7300 - 7500. The second pull had 8-9 counts from 6900 - 7500. Pull 3 had 6-7 counts from 7000 - 7500. With the filter the boost also increased from 5000 on, spiked 23psi then creeped to 24psi and tapered to rev limit. So I knew I had to richen up the fuel map up top.
What I did not realize is the amount of timing up top. In the previous map it was running 12*-14* of timing, which IMO is a little agressive for a "safe road course tune."
Thank you for your opinions.
Whats with the timing spike at 60 load in the low rpm range
Jun 26, 2012, 09:03 PM
#1646
Wizzo - I have not touched that part of the map yet, that is still leftovers from the "pro" tune/stock map. I am working slowly at getting all the knock out and so far on all of my logs, cruise, idle, pulls, those cells haven't been hit so I haven't messed with them yet.
Thank you for everyone's input. Sorry to be a little off topic in the fully tuned thread as my map is not yet.
Thank you for everyone's input. Sorry to be a little off topic in the fully tuned thread as my map is not yet.
Jul 2, 2012, 10:34 AM
#1647
Well now I have an actual contribution to this thread. Worked on it all last week, finally got my afr's in check. One issue with them was a big lean spike when transitioning from 2500 to 3k. Now I am at 11.7 peak torque an tapering to 10.9 up top, wideband is finally not jumping all over the place. Changed the timing up a good deal, and smoothed the entire map. Car runs soo much happier now. Biggest issue with the original tune was just not smooth, large transitions and the map was choppy. I also took the time to rescale my load since 2byte was hitting in the 270's.
Let me know what you guys think.
Let me know what you guys think.
Jul 2, 2012, 11:07 AM
#1648
Well now I have an actual contribution to this thread. Worked on it all last week, finally got my afr's in check. One issue with them was a big lean spike when transitioning from 2500 to 3k. Now I am at 11.7 peak torque an tapering to 10.9 up top, wideband is finally not jumping all over the place. Changed the timing up a good deal, and smoothed the entire map. Car runs soo much happier now. Biggest issue with the original tune was just not smooth, large transitions and the map was choppy. I also took the time to rescale my load since 2byte was hitting in the 270's.
Let me know what you guys think.
Let me know what you guys think.
