[bigolsen]

Ok so I just got dsmlink and am trying to dial in the LTFT by adjusting the deadtime like the instructions state.

I can't seem to get the idle values out of the negative and I'm thinking it is because I don't have an adjustable fpr yet, but Ive only got the walbro 190.

I started out by logging with the defaults for my fic650's which are:
Deadtime: 315
Global: -31%
Which turned out: +0.5% cruising
-8.7 idle

then tried 300 DT
and global -32% for:
+1.3 cruising
-6.8 idle



" " 285 DT
-32% +3.7 cruising
-8.0 idle


255DT
-31% +2.1 cruise
-9.5 idle


It seems I can't get close to the +/- 5% difference between cruising and idle trims that I should so I guess I'm better off sticking with the base settings for my injectors untill I can adjust base fuel pressure. DSMlink states that if Idle ltft is lower than cruise to remove deadtime which is what I did and in the end made the computer pull more and more fuel out at idle.

So is it ok for me to move on to WOT logging so I know if I can tweak fuel and timing variables for more power??

FYI: I just installed a 1g throttle body ported to 63MM prior to having dsmlink. Maybe that could be causing a rich idle??

Any suggestions from experienced dsmlinkers would be greatly appreciated.
Thanks.

 

[turbolover]

Something isn't right, those setting are usually right on? I havent had to much time to play with my link but I know when I first installed it I didn't have to touch anything as far as low throttle and cruising.. Perfect 14.9afr, maybe it does have something to do with the t/b but somethings causing you to run really rich.. Sorry I cant be more help, have you tryed posting on the link/forums?

 

[bigolsen]

I haven't tried posting on dsmlink lately it seems it takes forever for anyone to reply, but I'll try again.

 

[jeffgst]

Changing the deadtime will adjust LTFT lo and mid in an inverse fashion. One will go up while the other goes down.

From the original -31%, 315 deadtime setting, all you needed to do was adjust the LTFT lo (idle) value and leave the LTFT mid value alone. Bringing down the 50Hz slider down around 6-7% should have done the trick.

Read this for more info http://www.jeffgst.com/gmafcalibration2.html

 

[bigolsen]

Changing the deadtime will adjust LTFT lo and mid in an inverse fashion. One will go up while the other goes down.

From the original -31%, 315 deadtime setting, all you needed to do was adjust the LTFT lo (idle) value and leave the LTFT mid value alone. Bringing down the 50Hz slider down around 6-7% should have done the trick.

Read this for more info http://www.jeffgst.com/gmafcalibration2.html

I was wondering about that but I read posts that said don't touch anything untill ltft's are good and the dsmlink instructions only say to adjust the deadtime to change the ltft trims. I will try what you said. I just don't know why my idle trim could be so screwy when I'm running the stock mass.

Thanks a ton.

 

[bigolsen]

Ok after setting the maf 50hz slider to -7 I got these readings which i think are pretty in line:

Mid still good: -1.1%
lo (idle): -0.5%

What do ya think?

 

[jeffgst]

Ok after setting the maf 50hz slider to -7 I got these readings which i think are pretty in line:

Mid still good: -1.1%
lo (idle): -0.5%

What do ya think?

Pretty amazing, huh??

That is why I wrote my method on my website, since it is not in the DSMlink manual. It just works and I know it has helped hundreds of DSMlink users. I am up to 7000 hits a month on my site.

 

[bigolsen]

Pretty amazing, huh??

That is why I wrote my method on my website, since it is not in the DSMlink manual. It just works and I know it has helped hundreds of DSMlink users. I am up to 7000 hits a month on my site.

Yah thanks alot. They should have this info with DSMlink for when you cant get trims right from just changing deadtime. I'm glad you know your stuff.
Thanks.