Na-t tt ecu single turbo a/f's
06-17-13, 06:17 PM
#1
Na-t tt ecu single turbo a/f's
Hey guys, finally got my uego replaced and have something to monitor a/f ratios.
Im interested to know what kinda a/f's you guys are running on the Na-t tt ecu setup.
My car has run great on a 67 for about a 12k miles and now a 61mm feels great too, got the wideband hooked up and seems to bounce around kind funny going into boost, getting very lean but progressively getting richer all the way to 11.0 when I hit around 14psi.
Idle is about 15 and cruise is very rich
I imagine with a tune it would feel awesome, cause I have zero complaints right now about driveability
So whats are you guys getting at
-Wot
-cruise
-going into boost
-idle
Im interested to know what kinda a/f's you guys are running on the Na-t tt ecu setup.
My car has run great on a 67 for about a 12k miles and now a 61mm feels great too, got the wideband hooked up and seems to bounce around kind funny going into boost, getting very lean but progressively getting richer all the way to 11.0 when I hit around 14psi.
Idle is about 15 and cruise is very rich
I imagine with a tune it would feel awesome, cause I have zero complaints right now about driveability
So whats are you guys getting at
-Wot
-cruise
-going into boost
-idle
06-18-13, 08:57 AM
#2
glad to hear its running good, does it get leaner than 15 when it bounces around?
maybe check your map sensor line it shouldn't bounce around really.
with my RC 440's mine is staying at 14.8-15 idle and cruise, then once getting into boost its around 14 and somewhere around 5 psi or so it just goes really rich and by the time I am at 14 psi its a solid 10.0.
maybe check your map sensor line it shouldn't bounce around really.
with my RC 440's mine is staying at 14.8-15 idle and cruise, then once getting into boost its around 14 and somewhere around 5 psi or so it just goes really rich and by the time I am at 14 psi its a solid 10.0.
06-18-13, 05:19 PM
#4
glad to hear its running good, does it get leaner than 15 when it bounces around?
maybe check your map sensor line it shouldn't bounce around really.
with my RC 440's mine is staying at 14.8-15 idle and cruise, then once getting into boost its around 14 and somewhere around 5 psi or so it just goes really rich and by the time I am at 14 psi its a solid 10.0.
maybe check your map sensor line it shouldn't bounce around really.
with my RC 440's mine is staying at 14.8-15 idle and cruise, then once getting into boost its around 14 and somewhere around 5 psi or so it just goes really rich and by the time I am at 14 psi its a solid 10.0.
now its really bouncy between 14.5-15 on cruise, Sometimes it has weird lean spots going into boost, but for an extremely brief moment and pegs straight to 10.5 once full boost comes on
Its weird, ill have to try and take a video. I have a feeling my 140k o2 sensor should be replaced and ill prolly run better
with my auto getting worn down I find flat spots if I don't drive it correctly that ill be really lean but I tend to avoid lugging an auto ever if you know what I mean.
06-21-13, 01:41 PM
#5
k so I had the vacuum line at the rail off
now its really bouncy between 14.5-15 on cruise, Sometimes it has weird lean spots going into boost, but for an extremely brief moment and pegs straight to 10.5 once full boost comes on
Its weird, ill have to try and take a video. I have a feeling my 140k o2 sensor should be replaced and ill prolly run better
with my auto getting worn down I find flat spots if I don't drive it correctly that ill be really lean but I tend to avoid lugging an auto ever if you know what I mean.
now its really bouncy between 14.5-15 on cruise, Sometimes it has weird lean spots going into boost, but for an extremely brief moment and pegs straight to 10.5 once full boost comes on
Its weird, ill have to try and take a video. I have a feeling my 140k o2 sensor should be replaced and ill prolly run better
with my auto getting worn down I find flat spots if I don't drive it correctly that ill be really lean but I tend to avoid lugging an auto ever if you know what I mean.
06-21-13, 02:19 PM
#6
yeah I dropped in a new o2 when I did it so never had those problems. I can believe it though the gte ecu relies heavily on that o2 sensor, and i am always surprised how quick it finds 14.8 when warmed up with a narrowband sensor. I imagine if it was getting a bad reading it would be all over the place.
06-24-13, 06:55 PM
#7
yeah I dropped in a new o2 when I did it so never had those problems. I can believe it though the gte ecu relies heavily on that o2 sensor, and i am always surprised how quick it finds 14.8 when warmed up with a narrowband sensor. I imagine if it was getting a bad reading it would be all over the place.
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06-25-13, 09:12 AM
#8
gte & na-t
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^^Yeah mine does the samething, 14.5 to 15.8 at idle will pop a little bite sometimes ..10.0 in boost i have an aftermarket FPR set at 40psi.
I am changing the 02 sensor this weekend!
I am changing the 02 sensor this weekend!
06-25-13, 09:54 AM
#9
sounds about right, it doesn't richen up until you are already in boost but I think thats how its designed to increase spool and avoid wasting gas when you just sort of hover around a couple psi in regular driving. I don't think there is much chance of detonation on even a high compression motor at 5 psi or so, and after that it seems to get pretty rich so all is good although I am not sure exactly where it goes rich the boost gauge goes so fast and I don't have logging anymore.. lol.
Quick I think your o2 sensor is fine I have a brand new one in there it does the same thing.
Quick I think your o2 sensor is fine I have a brand new one in there it does the same thing.
Last edited by Ali SC3; 06-25-13 at 09:58 AM.
06-25-13, 10:22 AM
#10
06-25-13, 01:57 PM
#12
gte & na-t
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My plugs were gapped to 0.28, i will replace the boots on the coils and see if it make a difference...
If it happens to be the coils , i will just install my lq9 and install the aem.
If it happens to be the coils , i will just install my lq9 and install the aem.
06-25-13, 02:00 PM
#13
yeah with that gap you should be fine, its not the boots on the gte coils, check the plastic under the boot on the coil itself, if the plastic on the edge has a crack you can have misfires. lq9 is always nice but you know I am a vvti fan. I even like the idea of using 6 2zz coilpacks. they are internally ignited supposed to be pretty good and I think work with a stock ecu.
06-25-13, 02:21 PM
#14
For the price i got my vvti coils i wouldnt wanna bother, think i payed 100-something for 3 oem coils.
but yeah gonna order a new 02 sensor and see if it helps it run better, though it runs great as is.
now i have some weird ghost where when i turn the signal on or hit my brakes ALL my lights dim out. cant figure it out other than im using an 80 amp alternator
oh and for what its worth i dont have popping on mine. Gapped at .32 with ngk platinums
but yeah gonna order a new 02 sensor and see if it helps it run better, though it runs great as is.
now i have some weird ghost where when i turn the signal on or hit my brakes ALL my lights dim out. cant figure it out other than im using an 80 amp alternator
oh and for what its worth i dont have popping on mine. Gapped at .32 with ngk platinums
