Can I tune WOT with O2s
Thread Starter
TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
Can I tune WOT with O2s Is it possible to get a good tune by reading the O2's, without a wideband??
I have a 25 minute road race in 2 weeks and I need a tune for my 99 C5 6 speed, headers, no cats, smooth bellows, dual K&N, no screens MAF.
I used LS1edit to eliminate the rear 02 sensors and Air pump. Have not changed the fuel curve yet.
I logged data for the first time last night, Wow, this stuff is really cool, WOT on a country road with the laptop plugged in.
I can see that it switched to open loop at WOT. It is running rich as I expected, 1060, 1065 on the 02s.
From reading this site I understand that I need to change the PE table to lean out the open loop settings. Is it accurate to do this with feedback from the 02 sensors. I am reading that most everyone has a wideband for power WOT tuning. Is this a requirement, or just a luxury???
Is there a good chart for 02 = a/f ratio? 880 is good??
Thanks
I have a 25 minute road race in 2 weeks and I need a tune for my 99 C5 6 speed, headers, no cats, smooth bellows, dual K&N, no screens MAF.
I used LS1edit to eliminate the rear 02 sensors and Air pump. Have not changed the fuel curve yet.
I logged data for the first time last night, Wow, this stuff is really cool, WOT on a country road with the laptop plugged in.
I can see that it switched to open loop at WOT. It is running rich as I expected, 1060, 1065 on the 02s.
From reading this site I understand that I need to change the PE table to lean out the open loop settings. Is it accurate to do this with feedback from the 02 sensors. I am reading that most everyone has a wideband for power WOT tuning. Is this a requirement, or just a luxury???
Is there a good chart for 02 = a/f ratio? 880 is good??
Thanks
narrow band stock sensors are not arrurate enough to get a good tune with them.
while people may use them, its not the correct way to do it. 880 is generally accepted to be lean.
Ryan
while people may use them, its not the correct way to do it. 880 is generally accepted to be lean.
Ryan
Thread Starter
TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
I have read on other threads that 860 on the 02 is lean, 870-880 makes a lot of HP, but it is still close to lean. Probably closer to 880 or 900 would be safer, since I am WOT over 50% of the time for 25 minutes in road racing. I may try a few adjustments this weekend and check it out. Looks like I need to get that wideband on order and installed soon. What is the right number with a wideband, is it 12.7 for max power??
99 Corvette Road Racer
99 Corvette Road Racer
