Nistune Forums

ok im having a big mess with my labtop comm ports communication
so my tuning time is limited and i need some help where to start or a tune map for my setup

engine.
rwd sr20de-t
sr20det hg...
370cc injectors
rwd det turbo setup...stock boost.
fmic
atmospheric bov
255lph fuelpump
adjust...fpr
.....
rwd sr20de engine harness
with nistune ka24de ecu...

now my issue is that it had a tune in it for a ka24det..w n60 maf...
i had to swap to a sr20det maf..since my n60 threw code etc...
it ran okay w det maf changed in nistune...but would gurgle..in 4000plus rpm
and the ign map is kinda rough so i was thinking to start from scratch
now i have been comparing the maps between the 3 ecu maps
the k constants in the stock ka24de
is in 35,000 range
the sr20de type 2 map is set at 31,206
and the sr20det is 21475

which out of these 3 has the best ign and fuel maps for my setup
or does any one have a map file that would be good for this setup
any how im attaching my original tune...
the original tune idles at 22.4
iam losing communications when car is running which this just started after iam attempting to install the wideband
so i will deal with that my self...
but any insight on this would be great...

So you have an SR20DE+T and loom but using a KA24DE ECU? Firstly I would advise using the correct matching ECU for the application to avoid any issues

1. Your tune file is a S13 SR20DET ROM file, but you need to use the KA24DE ROM file with that ECU...

2. Your VQ map is for S13 SR20DET but you have a N60 MAF (from M30 Maxima so need that VQ map)

3. Next you cannot copy K constants from one ECU to another... only adjust the current ECU K by % required

4. Looking at the tune, the fuel map is a mess so would start again

I would start with the 53F00 base image (KA24DE)
1. Resize injectors to 370CC
2. Resize S13 KA24DE MAF to M30 VG30E MAF

Attached is what I started with. You might want to use the timing and fuel tables from the SR20DET as a guide, but with a high comp engine timing needs to be pulled back on boost. The fuel tables are probably good enough to start with. Check your AFRs pull back timing and watch for knock

sweet....
thank u Matt
i installed the n60 maf and loaded the first map setup
it worked great...
i used like 5 ferrite clips and i have no issues with droppin communications on conzult cable