Throttle enrichment

[tall1]

I've been tuning my rnn14 (Gti-r) with success but one issue stands out, fast throttle movement enrichment.
Has anyone had success tuning this? I have search and seen guys working with the throttle enrichment fast movement (h0230) table, dose this work for the sr20?

My load scales are correct, reads in 2nd last column at 16 psi. K and latency are good, I command a 11.76 a/f in the top end and get a 11.8 on the wideband. The car feels stronger after spool, but while tipping in too much while cursing, I see 10s may be 11s which makes it feel like a rich bog.

It idles well, is fine in close loop 14.7, starts to spool in the 13s and is almost perfect. I have yet to fiddle with the timing, setting up a knock link with a remote display for that.

My setup is as follows.
Base rom: 54c060
T28 Turbo
Nismo 555cc @ 4bar (641cc)
K: 33132
latency: 660us
Z32 AFM
JWT S3M cams
romulators x 2

Bin is attached.

My increase Fuel values are allready all 255s (5.1V)so it should not be reading from the last collum.

Any ideas?

[Fordy]

you should see a table called "throttle enrich" this is the one you need to change as it has a huge effect
I cannot see this table in the current version of nistune so you may not be able to see it either but its there and did make a big effect when i was running a older version of nistune

[Matt]

should be "accel increase"

[tall1]

I've tried to roll back to an earlier version of nistune but it won't load, tells me to upgrade to the latest version.

Could a revised or temp address file reveal the "accel increase" table?

Any idea what hex address the table is at?

[Fordy]

these are the tables we can see in 9.14.13



here is a picture of the table we need to show up again. Its name changed to "Throttle enrich" in version 9.14.9 but then dissapeared in the next update after 9.14.9



this last table i remember follows coolant temp so at 80C i'd have +12 and when i put it to around +190 the car dumped alot of fuel in nearly stalling when just pulling away

[tall1]

I'll try to clean the present version off my laptop, registry and all. Maybe 9.14.9 will load then.

[IceManPL]

This table "Increase Fuel" is in the new nistune but shows 255 everywhere. If you use old adr file (i have from 9.12b) this table is back again with correct (i think) values. But maybe some other tables are wrong then ?

[tall1]

The other tables are fine.

I changed to the v9.12b base_sr20_ka24_e address file and the tables emerged on v 9.14.24.

I,ll fiddle with the "accel increase" table as Matt has advised.

Any Ideas how this table responds to tuning?

[Fordy]

Any Ideas how this table responds to tuning?

its temp based buddy

value 12.0 at the top should say 80C

adjust the figures down like you would the warm up tables etc for bigger injectors

[Matt]

I'll check over these tables this weekend (already sent myself a note) and will compare against the earlier version to make sure its still there (different name to be consistent with other vehicles)

[Matt]

Unzip these into C:\Program Files\Nistune\Address

What I found was that
ADD_FUEL = 'Acceleration increase fuel' is used as part of the fuel map reading. It was correct addressing on the Type 1/2 ECUs but not the Type3/4 ones which is why the address got moved. This is the TPS voltage used to determine when to access the last column of the fuel map. Most ECUs have these as 255 meaning full TPS voltage

TPS Enrichment trigger - amount of TPS volts required before accessing the fuel maps (rather than idle tables)

[Fordy]

matt just tried them files

seems now show the "tps enrichment trigger" the table that was missing

altho i get a error when opening nistune now

[Fordy]

matt i uninstalled and reinstalled and editted the address file base_sr20_ka24_512_e.adr
and only added in the line
"TPS_ENRICHMENT_TRIGGER,&HE230,16,1,16,1,TPS volts before using fuel maps"
into the section under "#Acceleration increase volume"

seems to have got the table showing up with my setup without any start up errors, will try it on the road to check it works like it used to during the week

[Matt]

The error would be due to extra tables added in the 0.9.14.15 version which isn't available yet

[tall1]

Thanks Matt.
The address file gives a minor error but can be overlooked.

My tps enrichment trigger is as follows.

I am assuming that above the curve uses the fuel map.

Below the curve uses a combination of fuel enrichments?