apexi neo tuning
09-29-12 | 03:36 PM
#2
Rotary $ > AMG $
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From: And the horse he rode in on...
hi,
i've been trying to tune my car with the neo and not having very much luck.
my current setup:
early 87 turbo car
s4 intake system/TB/sensors & harness
s5 "stock" JDM engine core 90psi+ all faces hot
rtek 1.8
walbro 255
740cc primary
1kcc secondary
new stock FPR
trailing plugs in all 4
.60 t04b hybrid/s5 turbine/manifold
3" turbo back
big frontmount
glowshift wb o2
etc...
i dont have any data logging, i'm just trying to tune for target AFR (11.5)
the car leans out @15psi ~5100-5200+rpm, but thats not my main issue
when driving the car, part throttle boost seems unuseable with the correction so high for 15psi in the higher gears (drowns the engine). i'm thinking that its because the software for correction is tps/rpm load calculated where the factory TPS reads 100% at 1/2 throttle.
anyone else have issues like this?
thanks
i've been trying to tune my car with the neo and not having very much luck.
my current setup:
early 87 turbo car
s4 intake system/TB/sensors & harness
s5 "stock" JDM engine core 90psi+ all faces hot
rtek 1.8
walbro 255
740cc primary
1kcc secondary
new stock FPR
trailing plugs in all 4
.60 t04b hybrid/s5 turbine/manifold
3" turbo back
big frontmount
glowshift wb o2
etc...
i dont have any data logging, i'm just trying to tune for target AFR (11.5)
the car leans out @15psi ~5100-5200+rpm, but thats not my main issue
when driving the car, part throttle boost seems unuseable with the correction so high for 15psi in the higher gears (drowns the engine). i'm thinking that its because the software for correction is tps/rpm load calculated where the factory TPS reads 100% at 1/2 throttle.
anyone else have issues like this?
thanks
.
09-30-12 | 03:57 AM
#5
You might contact Digital Tuning and ask how much an upgrade to 2.x is.. That'll give you some real tuning ability.
...But this is as much as I can help, haven't gotten to play with that sort of thing yet myself.
...But this is as much as I can help, haven't gotten to play with that sort of thing yet myself.
09-30-12 | 03:30 PM
#7
if the neo reads 100% at half throttle, then that is a huge problem. that means its sending the same fuel at half throttle as it is as full throttle, aka super lean.
the neo is a bandaid to needing more fuel, it's better for people with a factory setup with bolt ons who just need a little more fuel than what the ECU wants to send.
the neo is a bandaid to needing more fuel, it's better for people with a factory setup with bolt ons who just need a little more fuel than what the ECU wants to send.
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09-30-12 | 04:35 PM
#8
Thread Starter
Don't hate my V8
iTrader: (4)
Joined: Mar 2006
Posts: 1,129
Likes: 0
From: Cornfield, Indiana
if the neo reads 100% at half throttle, then that is a huge problem. that means its sending the same fuel at half throttle as it is as full throttle, aka super lean.
the neo is a bandaid to needing more fuel, it's better for people with a factory setup with bolt ons who just need a little more fuel than what the ECU wants to send.
the neo is a bandaid to needing more fuel, it's better for people with a factory setup with bolt ons who just need a little more fuel than what the ECU wants to send.
i really didnt think my setup was that crazy, couple other members are running similar setups sucsefully.
rtek 2.1 upgrade would be the most economical, but im liking the way ether a 93-95 FD power FC or AEM EMS4 because i dont trust the 26yr old harness/tuning over 15psi. Ether one i would build my own harness.
09-30-12 | 04:41 PM
#9
if the neo reads 100% at half throttle, then that is a huge problem. that means its sending the same fuel at half throttle as it is as full throttle, aka super lean.
the neo is a bandaid to needing more fuel, it's better for people with a factory setup with bolt ons who just need a little more fuel than what the ECU wants to send.
the neo is a bandaid to needing more fuel, it's better for people with a factory setup with bolt ons who just need a little more fuel than what the ECU wants to send.
If the Neo reads 100% at half-throttle and dumping the same amount of fuel as if the engine really was at WOT, then it would be running SUPER RICH, not LEAN.
Seriously, get rid of the neo, and go with something that has real tunability, not a "guess and check" type of computer..... An old Iphone 1 can tune better than that thing
09-30-12 | 04:51 PM
#10
we have no idea who tuned it and how they tuned it, my tuner always starts at partial throttle and works towards WOT. in my head i was thinking if it was tuned for proper afr at 1/2 throttle, it would be lean at WOT. if it was tuned for proper afr at WOT then it would be rich at 1/2 throttle. we're both right.
09-30-12 | 10:56 PM
#11
Thread Starter
Don't hate my V8
iTrader: (4)
Joined: Mar 2006
Posts: 1,129
Likes: 0
From: Cornfield, Indiana
ah ****
2nd Generation Fuel Calculator
according to this website (no idea how reputable) it says it caps the injector dutycycle around 58-63%
the rtek 1.8 raises the primaries cap 5%, still not **** tho.
the neo would correct for more fuel but the stock ecu would still cap the injector dutycycle at that 58-63 range, screwing the fuel delivery....
it all makes perfect sense now...
2nd Generation Fuel Calculator
according to this website (no idea how reputable) it says it caps the injector dutycycle around 58-63%
the rtek 1.8 raises the primaries cap 5%, still not **** tho.
the neo would correct for more fuel but the stock ecu would still cap the injector dutycycle at that 58-63 range, screwing the fuel delivery....
it all makes perfect sense now...
09-30-12 | 11:30 PM
#12
ah ****
2nd Generation Fuel Calculator
according to this website (no idea how reputable) it says it caps the injector dutycycle around 58-63%
the rtek 1.8 raises the primaries cap 5%, still not **** tho.
the neo would correct for more fuel but the stock ecu would still cap the injector dutycycle at that 58-63 range, screwing the fuel delivery....
it all makes perfect sense now...
2nd Generation Fuel Calculator
according to this website (no idea how reputable) it says it caps the injector dutycycle around 58-63%
the rtek 1.8 raises the primaries cap 5%, still not **** tho.
the neo would correct for more fuel but the stock ecu would still cap the injector dutycycle at that 58-63 range, screwing the fuel delivery....
it all makes perfect sense now...
i had a safc 2 which is what you got with a brighter screen and vtec control
FIRST if you are going to use the neo YOU NEED TO WIRE IT TO THE PRESSURE SENSOR
as we all know the s4 have a narrow band tps and will make any thing past 50% pointless and the flapper style airflow meter FOR A PIGGY back is not much better
the main problem with the neo on a s4 (wired how they say it should)is that it never know when you are at 100% throttle the one senor that can really relay the full throttle trigger is the manifold pressure sensor.
if you search for the safc 2 you can find the thread on this.
09-30-12 | 11:53 PM
#13
Thread Starter
Don't hate my V8
iTrader: (4)
Joined: Mar 2006
Posts: 1,129
Likes: 0
From: Cornfield, Indiana
i had a safc 2 which is what you got with a brighter screen and vtec control
FIRST if you are going to use the neo YOU NEED TO WIRE IT TO THE PRESSURE SENSOR
as we all know the s4 have a narrow band tps and will make any thing past 50% pointless and the flapper style airflow meter FOR A PIGGY back is not much better
the main problem with the neo on a s4 (wired how they say it should)is that it never know when you are at 100% throttle the one senor that can really relay the full throttle trigger is the manifold pressure sensor.
if you search for the safc 2 you can find the thread on this.
FIRST if you are going to use the neo YOU NEED TO WIRE IT TO THE PRESSURE SENSOR
as we all know the s4 have a narrow band tps and will make any thing past 50% pointless and the flapper style airflow meter FOR A PIGGY back is not much better
the main problem with the neo on a s4 (wired how they say it should)is that it never know when you are at 100% throttle the one senor that can really relay the full throttle trigger is the manifold pressure sensor.
if you search for the safc 2 you can find the thread on this.
i have it wired up how the NEO pdf manual shows, how do i wire in the pressure signal?
10-02-12 | 10:28 AM
#15
Thread Starter
Don't hate my V8
iTrader: (4)
Joined: Mar 2006
Posts: 1,129
Likes: 0
From: Cornfield, Indiana
doing some more research, wiring the "TPS" signal lead to the actual MAP sensor return signal or installing a dedicated map sensor
is the concept behind this so that fuel correction only comes on when boost is applied rather then throttle load?
is the concept behind this so that fuel correction only comes on when boost is applied rather then throttle load?
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