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Apexi Neo -> Dec Air Settings

bumble_bee

By bumble_bee,
in Engines & Forced Induction

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bumble_bee Rising Star

bumble_bee

Posted
Posted

hey, i got an apexi neo afc fitted to a r33, just wondering if anybody else has got the same..

coz my dec setting wasnt tuned in by the tuners..

so any info would be great...

from what it display's it says...

THROTTLE is set to "off", the NEO1 is set to "800rpm", and NEO2 is set to "1000rpm"

so..does this mean NEO1 is low throttle settings?

and NEO2 is high throttle settings?

and when select throttle..from "OFF"...then goes to "0.1%" all the way to 100% if u set it there...

its not a on/off type selection.

so yeah..

confusing..lol

any ideas would be great, thanks

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https://www.sau.com.au/forums/topic/214400-apexi-neo-dec-air-settings/
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Mitchee Proficient

Mitchee

Posted
Posted

This is from the AFC Neo Manual... Basically if you have a stock BOV, dont worry about it. If you have an atmo bov/no bov then you can use this to prevent stalling.

If the throttle is rapidly released on a vehicle with a hot wire and Karman turbo airflow

signals, the engine may be stalled by blow-back.

If the throttle is rapidly pushed back, the airflow sensor may react to the blow-back,

disturbing its signals, and then failing in fuel injection response to the deceleration,

causing the engine to stall.

In such a case, it is possible to prevent the engine stall by imposing an upper limit

restriction on the airflow signals by setting“Dec Air”and then shutting off the airflow

signals disturbed by the reverse blow.

If the throttle opening goes less than the value set by“Dec Air”at a rotation speed

lower than“Air Map”engine rotation speed“Ne 02,”airflow signals that are higher than

the airflow usage ratio (or Karman turbo frequency) set in“Dec Air”are not output.

This is to stabilize the airflow signals.

Operations:

Select“Thr”“Ne01”or“Ne02”with the Left and Right keys.

Increase and decrease the set values with the Up and Down keys.

This function is not enabled when“Thr”is“OFF.”

This correction functions at a throttle opening less than the value set in“Thr.”

The rotation speeds set in“Ne01”and“Ne02”are those set in“Ne01”and“Ne02”in

“Air Map.” If a rotation speed in“Air Map”is changed, the one in“Dec Air”is also

changed. (This change is enabled by“Air Map”only.)

Set an output upper limit for the airflow signals that are at the engine rotation

speeds in“Ne01”and“Ne02” If an engine rotation speed is between“Ne01”and“Ne02,”

calculate the upper limit for the airflow signals by linear interpolation. If the

engine rotation speed is lower than that of Ne01 the upper limit for the“Ne01”airflow

signals is adopted.

This function is not enabled at an engine rotation speed that is higher than that of

“Ne02”

bumble_bee Rising Star

bumble_bee

Posted
  • Author
Posted

ive got a atmo bov..

stalling is not the issue..

i had that problem fixed on my second tune by speedworks in perth..never stalled again from having an atmo bov =)

i just got idle problems..now and again

they go away for a wekk to months..then bad all over again etc..

and i ve tried everything..from cleaning afm, checked plugs/changed plugs etc..ive got spiltfires aswell..

umm...cleaned the iacv..used forton throttle body cleaner to clean throttle body etc..

so yeah..pretty much everything

dont tell me to get a new ecu..coz i knoe..and i will

but for now , hopefully i can fix this problem....

just like any other r25det..lol

so my main problem is.......>

but sometime wen i clutch in the revs drop straight to lik 500rpm

and wen turning it can drop to pretty much 100-200 rpm..coz of the power steering..

so i believe this setting will help wen slowing down and wen i clutch in etc...

  • 3 weeks later...
R33Matt Collaborator

R33Matt

Posted
Posted
y use standard bov?

wen new atmo bov is fine?

Because the atmo bov is the reason why the revs are dropping so low. Its doing the same on my R33 and its starting to annoy me, lol. Pretty sure the atmo bov makes the car run richer as well, as my bumper is always covered in black crap just after a few drives.... Thinking of going back to the standard bov myself...

bumble_bee Rising Star

bumble_bee

Posted
  • Author
Posted

mayb i'll invest in those dual type bov..

wer its also plumb-back

and has a release wen ther a load of pressure

so u can set it to 100% plumb-back, 50-50% etc...or 100% atmo...

would this fix the problem of dying/idle issues etc?????

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