danielhv 87 microsquirt project

danielhv · Sep 6, 2018

I feel like I'm just going in circles with my Microsquirt / Tunerstudio setup. Do we have anyone that knows the ins and outs of this? Trying to get idle setup correctly.

Ive got my spark and fuel table flattened out in the idle areas while I try to work this out, and will smooth it once I'm certain it's idling properly.

Here is my latest log, and tune.

Log: https://drive.google.com/open?id=13O...ty5ICFspn_3orB

Tune: https://drive.google.com/open?id=1yS...nez0gzl_88shUG

Car is an 87GT, V3 @ 10psi, AFR185's, Systemax 2, E cam, 4r70w, 42lb Bosch Green Giants

a91what · Sep 6, 2018

Lets start with the basics before i dive into the software, are you trying to get the car to idle in warm up mode or Closed loop?
what is your AFR while idling?
how much timing are you running while idling?

lets start with these and see what we come up with. Thats a very common combination i have tuned many times

danielhv · Sep 6, 2018

a91what said:
Lets start with the basics before i dive into the software, are you trying to get the car to idle in warm up mode or Closed loop?
what is your AFR while idling?
how much timing are you running while idling?

lets start with these and see what we come up with. Thats a very common combination i have tuned many times

I have the IAC valve disabled for now. AFR is in the 13.8 range, base idle is at 10, and my timing table for idle is at 18.

danielhv · Sep 6, 2018

a91what · Sep 6, 2018

ok what rpm are you targeting?

danielhv · Sep 6, 2018

Well everyone up to this point is saying 850 - 900. It's smoother up around 1000 or so, but I'm not sure what's best.

a91what · Sep 6, 2018

800 is about as low as that cam will like to idle, I suggest trying this for now....

try this setting and report back, what this will do is create a constant feedback loop for the timing to control the idle speed.

now if you are using warmup mode, you will need to change the 'idle advance on' setting to rpm, then setup the table as i have it below.

danielhv · Sep 6, 2018

Definitely much smoother. I added a little fuel to bring the AFR down a tad. I left a mark in the log where I made that change.

View: https://drive.google.com/open?id=1q41es3JdFkPbjFbPD5efZCf0rN-rHqPq

a91what · Sep 6, 2018

yes i can see the rpmdot come down. Now that is a tool you have to get the idle to come in line.

the idle looks fairly stable for the E303, now i suggest you turn on CL idle. these settings are difficult to pin down right off the bat so be patient. dont forget to setup the cl idle rpm curve. Use the basic function and set the sensitivity slider to 1200
you will also need to change the above idle correction advance to the way i had it set in the first two pictures.

do all of this and report back with a datalog,

danielhv · Sep 6, 2018

Changes made. seemed to hunt a little, smoothed out around 1000ish rpm.

LOG:

View: https://drive.google.com/open?id=1nmGtGocOk0opiqt-u2c9ChBi4hqxBQCV

danielhv · Sep 6, 2018

and here is my CL Idle Target RPM Curve:

a91what · Sep 6, 2018

Ok the curve is high set it for 1200 far left and 900 far right and smooth inbetween.

something is wrong with the adaptive idle settings or the table it was adding a constant 10* timing to the curve. 28* total will make it idle high

danielhv · Sep 6, 2018

I'm a timing newb. Could the 10 be the base timing set at the distributor?

danielhv · Sep 6, 2018

table adjusted and smoothed.

a91what · Sep 6, 2018

no i am looking at the datalog, the software already takes the 10* from the distributor into account.

notice in the datalog i have
SPK: spark advance = this is the total timing the engine is seeing with all the timing trim tables taken into account
SPK: idle advance = the current idle advance adder this can be seen as a positive or negative number

dont mind the tune file loaded in on the right it is from a car i am tuning with MAF

danielhv · Sep 6, 2018

i see, where is that set at? I don't recall ever adding anything like that.

danielhv · Sep 6, 2018

a91what · Sep 6, 2018

yeah you did, thats the idle advance table i had you setup in post #7. did you go back into the settings and change them to how i have them in the first two photos?

danielhv · Sep 6, 2018

Ah, I think I see what I did. I mixed the two windows up, didn't realize they were different.

Fixed the adaptive advance timing table... but my idle rpm advance timing option is greyed out.

a91what · Sep 6, 2018

thats correct you will now use the adaptive advance option that is selectable and set it up like the 2nd photo in post #7

danielhv 87 microsquirt project

Member

SendMeUrDataLog

Member

Member

SendMeUrDataLog

Member

SendMeUrDataLog

Member

SendMeUrDataLog

Member

Member

SendMeUrDataLog

Member

Member

SendMeUrDataLog

Member

Member

SendMeUrDataLog

Member

SendMeUrDataLog

Similar threads

Privacy & Transparency

Privacy & Transparency