Series II ECU Tuning - Page 44 - RX8Club.com



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Old 02-23-2017, 03:20 PM   #1076
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I come from FD RX7s, so please excuse any of my ignorance. I've been trying to read a lot here.

I'm considering a long tube header of some sort. I don't know if that's worth a tune, but I also would like to increase OMP injection, have throttle tuning, and disable CELs if necessary. Is it better to just leave the tune alone and premix instead?
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Old 02-23-2017, 03:34 PM   #1077
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Originally Posted by Nataphen View Post
I come from FD RX7s, so please excuse any of my ignorance. I've been trying to read a lot here.

I'm considering a long tube header of some sort. I don't know if that's worth a tune, but I also would like to increase OMP injection, have throttle tuning, and disable CELs if necessary. Is it better to just leave the tune alone and premix instead?
The header itself wont change anything that needs tuning . If you put an intake on it ... that would mess up the tune .

OMP rate on the s2 seems to be fine from what I've seen here and premix isn't beneficial unless you use a high dose of it . (100:1)
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Old 02-23-2017, 03:58 PM   #1078
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The header itself wont change anything that needs tuning . If you put an intake on it ... that would mess up the tune .

OMP rate on the s2 seems to be fine from what I've seen here and premix isn't beneficial unless you use a high dose of it . (100:1)
Thank you for your help. I used to premix 128:1 in my FD all the time, so I'm used to mixing quite a bit per tank.

I only plan to do full bolt-ons. Would I really be missing out on anything without an intake and tune, or would the header and mid-pipe alone give me all the perceivable benefits? I can learn to tune this car too if it would benefit me, but I don't have as much time to data log and adjust as I used to, much less adjust to a new learning curve.
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Old 02-27-2017, 03:24 PM   #1079
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Originally Posted by Nataphen View Post
Thank you for your help. I used to premix 128:1 in my FD all the time, so I'm used to mixing quite a bit per tank.

I only plan to do full bolt-ons. Would I really be missing out on anything without an intake and tune, or would the header and mid-pipe alone give me all the perceivable benefits? I can learn to tune this car too if it would benefit me, but I don't have as much time to data log and adjust as I used to, much less adjust to a new learning curve.
Removing the cat gives you the most benefit , although you wont feel anything . It's been shown many times over that the effect of every bolt on known to man is .... negligible . Intakes do very little and a tune doesn't do a lot either . Add everything together and you do get a slightly quicker car but the cost per hp is ridiculous.
You would do the exhaust for tone more than power.
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Old 10-25-2017, 05:03 PM   #1080
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Guys, what is the minimum AFR or lambda that the WB O2 sensor will register?
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Old 10-25-2017, 08:30 PM   #1081
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10.8 - 11.0 or so I think
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Old 10-26-2017, 12:22 AM   #1082
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Thanks, it appears that I'm running very rich when in open loop under heavy throttle. My AFR is hitting the limit of the sensor at 10.9. Stock tune. I'll post logs in a more appropriate place as soon as get to downloading them. Something funky may be going on.
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Old 10-26-2017, 06:26 AM   #1083
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Thanks, it appears that I'm running very rich when in open loop under heavy throttle. My AFR is hitting the limit of the sensor at 10.9. Stock tune. I'll post logs in a more appropriate place as soon as get to downloading them. Something funky may be going on.
What is your battery voltage before startup, Secondary o2 temp before and during the wonky, batt voltage, and Alternator Duty Cycle around that time?

Sec o2 is right next to the fireball maker and despite decent insulation, sometimes it goes all Kenny Loggins off the aircraft carrier....
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Old 10-26-2017, 03:06 PM   #1084
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What is your battery voltage before startup, Secondary o2 temp before and during the wonky, batt voltage, and Alternator Duty Cycle around that time?

Sec o2 is right next to the fireball maker and despite decent insulation, sometimes it goes all Kenny Loggins off the aircraft carrier....
Did they rewrite the English language because this is like the 3rd or 4th post in a row from you that I can't decipher into any logical meaning? Or maybe you're from a different planet ...
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