Alfa romeo 2.4 jtdm 200hp smoke map

by **dzjekoff** » Thu Sep 19, 2019 8:08 am

Hello guys anyone explain me how to calculate smoke map I change some maps dw, boost map, svbl.
I think no needed change more maps because engine is stock...
My smoke map
X - iq(mm3)
Y - RPM
z - maf

the problem is I don't know how to count with z axis
I found some topic on this forum and some guys said, so engine size 2387/5 = 474.4 now atmospheric pressure so for example
1300/474.4 = 2.74 now maximum boost so I change it for 2650 stock had 2500 so 2650/2.74 = 967.15 so now is 967 mg air per stroke so Iwould like to change for afr around 17.00, 967/17 = 56.88 mg fuel
I have problem because usually smoke map have in z axis IQ but in Alfa I have atmospheric pressure ...

SW:1037383773

by **casianoros** » Mon Nov 04, 2019 8:57 pm

Could you post the file or a picture of your smoke map ?

by **sparco** » Mon Nov 04, 2019 11:52 pm

No such thing as a perfect engine. 2 bar wont net you 2 times the amount of air, let alone throughout the entire rev range.

If thats an EDC16 ecu, its not atmospheric pressure in your axis either.

by **jurebv** » Thu Nov 07, 2019 5:05 pm

its not athmospheric pressure, its boost pressure or so called "Smoke by MAP" to calculate MAF from map use cylinder ccm * boost in bar * air density * engine efficiency

BR