Tuning with a MAFT 101....
Re: Tuning with a MAFT 101.... 2000 Camaro SS- are you sure your O2 simms are in your SLP LT headers? That doesn't sound right to me. With my Grots, the front O2's are on the headers, and the rear O2 sensors are on the y-pipe behind the cats. I know you don't have cats, but your rear O2 sensors should be on your y-pipe- and this is where your simms should be.
Re: Tuning with a MAFT 101.... I have studied all the information above and understand it. I have a couple of questions. In the article on C5 Forum, he states there are fuel cells 1-22, with 22 being wot, 21 being deceleration, and 20 is idle. When you get the data into the data table, do you eliminate all the lines with any of these in the fuel cell column? And finally, I ran atap today and I get a 0 in the fuel cell column, lot's of 0's. What are these and do you remove these also?
Re: Tuning with a MAFT 101.... I think he was asking about fuel cell 0, not when LTFTs are 0. I have also seen fuel cell 0 a lot and wondered what it is. Cells 17-20 are all idle cells, so only look at cells under 17 when averaging LTFTs. Another thing that has confused me- I see cell 22 alot with TPS values less than 100%. Why would this be? I thought cell 22 was for WOT only.
TECH Junkie
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Re: Tuning with a MAFT 101.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Rob98Z:
<strong>
LTrims - LTrims Mean Nothing At WOT.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I thought that if at part throttle you have positive Ltrims, when you go to WOT, the car will dump in extra fuel on top of the WOT fuel map...so the leaner you are at part throttle, the more fuel your car dumps in on top of standard WOT fuel mapping??????
<strong>
LTrims - LTrims Mean Nothing At WOT.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I thought that if at part throttle you have positive Ltrims, when you go to WOT, the car will dump in extra fuel on top of the WOT fuel map...so the leaner you are at part throttle, the more fuel your car dumps in on top of standard WOT fuel mapping??????
Launching!
Joined: Nov 2001
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From: So. IL
Re: Tuning with a MAFT 101.... Do you set the ltrim cells to record in cells 1-19? Or does the Excel file show all cells and you have to sort them?
I use windows ATAP and I thought I had found where to set the fuel cells, but can't find it again.
Does anyone have a Windows ATAP Excel file I can use?
Thanks.
Rick
<small>[ May 28, 2002, 06:18 PM: Message edited by: NASSty01 ]</small>
I use windows ATAP and I thought I had found where to set the fuel cells, but can't find it again.
Does anyone have a Windows ATAP Excel file I can use?
Thanks.
Rick
<small>[ May 28, 2002, 06:18 PM: Message edited by: NASSty01 ]</small>
Re: Tuning with a MAFT 101.... SS125 & NASSty01 : The Excel file will show you all data collected and you can manually sort the columns and/or use functions to only include the data if the cells are 1-19. I don't use Windows ATAP since my laptop is such a joke <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
verbs: This concurs with my experience as well.
BADSS: I've read that the PCM actually interprets WOT as anything more than 80% (I think that was the number, it was in the 80's).
Chris ARE 360: What do you consider a safe AF ratio?
Rob98Z: I would not consider .89-.91 as the ideal range, nor even reference O2 values for WOT. I had to set my MAFT to +14% to get a .88 average at WOT. I took it to a wideband dyno, and my AF @ WOT was in the upper 14's <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> We reset the WOT to +0 and my AF dropped to a linear 13:1, and I gained 30rwhp. I didn't mess with it further, but I may try Chris' suggestion above, so long as I know when to quit <img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" />
<small>[ May 29, 2002, 11:42 PM: Message edited by: JimMueller ]</small>
verbs: This concurs with my experience as well.
BADSS: I've read that the PCM actually interprets WOT as anything more than 80% (I think that was the number, it was in the 80's).
Chris ARE 360: What do you consider a safe AF ratio?
Rob98Z: I would not consider .89-.91 as the ideal range, nor even reference O2 values for WOT. I had to set my MAFT to +14% to get a .88 average at WOT. I took it to a wideband dyno, and my AF @ WOT was in the upper 14's <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> We reset the WOT to +0 and my AF dropped to a linear 13:1, and I gained 30rwhp. I didn't mess with it further, but I may try Chris' suggestion above, so long as I know when to quit <img border="0" title="" alt="[Embarrassed]" src="gr_emb.gif" />
<small>[ May 29, 2002, 11:42 PM: Message edited by: JimMueller ]</small>
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Re: Tuning with a MAFT 101.... I am not sold on Fuel Cell 22 as the only WOT lookup. I consistently see switching between 22 and 15. Can anyone explain cell 15 (i.e is it referenced when KR is present or O2's are too low/high; temp; ...What is the trigger ?)
Found this thread https://ls1tech.com/ubb/cgi-bin/ulti...=001103#000002
<small>[ May 30, 2002, 06:27 PM: Message edited by: Batmobile/SS ]</small>
Found this thread https://ls1tech.com/ubb/cgi-bin/ulti...=001103#000002
<small>[ May 30, 2002, 06:27 PM: Message edited by: Batmobile/SS ]</small>
