ECMlink first time posting data log

[dsmcurse]

hey guys, i thought id post a data log for the first time to get opinions. this was a second and third gear pull with 2 buddys in the car last night. (packin a extra 400 pounds weight on this pull) my short term fuel trim and combined fuel trim numbers seem pretty close my actuall boost and boost estimate could be a bit closer. my afr estimate and plx seem pretty close.

my omni 4bar map sensor isnt mounted as close to the intake plenum as i would like it to be. the boost/vacume referance hose is a 3/16" nice hose but its about 14''s long (from plenum to omni sensor) i remember glancing over at my auto meter boost gauge in third and seein it buried at about 33psi but omni map sensor only recorded like 30.5psi

also when lookin at boost roll on compared to rpm im thinkin "$hit thats a bit slower boost than how it actually feels" i just switched from crower 272 cams to brian crower 280 cams. my upper rpm to redline pulls super hard tho (like 6 to 8 and a half rpm) im almost startin to think these bigger cams made me sacrafice a bit of midrange

im also considering extending the wiring connection to my map sensor that way i can mount the omni about 4 inches away fom intake plenum vs's the 14inches away that it is right now. i might get a bit more accurate reading if boost referance line to sensor was short and sweet and right to the point.

thanks for opinions

 

[snowborder714]

im almost startin to think these bigger cams made me sacrafice a bit of midrange

They did.

im also considering extending the wiring connection to my map sensor that way i can mount the omni about 4 inches away fom intake plenum vs's the 14inches away that it is right now.

Yes, do it.


Also, make sure you've gone over this list.
http://www.dsmtuners.com/forums/ecm...efore-you-ask-ecmlink-dsmlink-log-advice.html

 

[dsmcurse]

the mid range sacrafice sorta sucks but for how hard my upper portion starts pullin i guess it was worth it. i guesse i could mention this is on hx40 with 3" short route IC piping and 4" fmic, blue max 1200's and dual 255 pumps

oh and yes ive read that link befor, thanks for the reminder. my set-up is pretty solid car is hunky dunky as far as that check off list goes that you just posted. my only concern was havin omni map sensor mounted far away

any opinions on these values? is there anything i can do to bring back some of that midrange that i lost? id like to see boost roll on like it did befor hand. the new cams makes it feel like it lost about 500rpm of spool.

 

[snowborder714]

1. Go back to a smaller cam. Why did you go to the 280's anyway (and to one of the lower quality cams at that)?

2. Play around with your adjustable cam gears (I think you may have them according to your profile). Not sure what is meant by "dialed in" - degreed maybe?


You still have a bit of tuning to do when looking at that log, specifically just AFRatioEst and PLXWB. Since you're running SD, I'd download LinkTools and run your log through there. It should give you an adjusted SD table to correct the variance in the already mentioned values.

What fuel are you on?

 

[dsmcurse]

my buddy alex (aka boostdriven) and i degreed in the 280's as carefull as we could. it seems correct. for fuel i use 91octane that the pump says "garenteed no ethanal" the pump gas is combined with water/meth. i use ngk number 7 plugs gapped tight at about 22. fuel system is 225 in tank to a 255 inline which supplys a ported fuel rail with blue max 1200's, the meth system is a direct port set up.

correct me if im wrong but in order for my pounds per minute airflow numbersto be correct, dont my VE tables have to be %100 spot on? i see boost estimate and actuall boost are a bit out from one another, and when i look at the plx compared to afr estmate its alot further out than what id like it to be

what would be the next steps to get my VE tables 100 percent? more so than that id like to get afr estimate and the plx to be alot closer to one another. thanks in advance

 

[snowborder714]

correct me if im wrong but in order for my pounds per minute airflow numbersto be correct, dont my VE tables have to be %100 spot on?

Correct.

i see boost estimate and actuall boost are a bit out from one another, and when i look at the plx compared to afr estmate its alot further out than what id like it to be

You want to compare AFRatioEst and PLX instead of BoostEst and MAP. Reason is below:

BoostEst is meaningless in speed density. BoosrEst is calculated from the airflow reading at 100% VE and 70*F intake temp. In speed density, the airflow reading is calculated from actual boost (MAP sensor) so BoostEst and actual boost should always match at 100% VE. Since actual air temp is also used in the speed density airflow calculation, they may not match exactly.

BoostEst, in speed density, will only reflect changes in the VE table from 100%.

what would be the next steps to get my VE tables 100 percent? more so than that id like to get afr estimate and the plx to be alot closer to one another. thanks in advance

Download and use LinkTools. The built in functions will help tune your SD table during WOT pulls.