Help with SOI and Duration

by **MothaHDI** » Tue Mar 06, 2018 11:54 pm

jurebv wrote:Calculating duration map from microseconds to deegres of crankshaft rotation : mS / [((60/ RPM)/360)x10^6]
Then simpl calculate EOI = SOI - duration (in cr deegres)

So... i tried this but the result are way off from EOI_Builder , why? :o

It's because of rail pressure?

by **jurebv** » Wed Mar 07, 2018 8:35 am

Never tried eoi builder , dont know how it works, but it cannot be different since you are using microseconds duration from duration map at certain rail pressure and then putting it into formula. Remember formula i posted is for Duration deegres not EOI, its just conversion from duration in microseconds to duration in crankshaft degrees, to get EOI you still have to Duration - SOI = EOI

by **uberderv** » Thu Mar 08, 2018 10:32 am

Are you 100% your maps are selected properly? Maybe post some pics of your results.

by **jurebv** » Fri Mar 09, 2018 9:39 am

Can you post picture of your Duration map and SOI map and I'll calculate EOI, i dont have time now for downloading your file

by **MothaHDI** » Sat Mar 10, 2018 1:43 am

Sry for the delay!! You you need anything just ask :D thx for helping

by **MothaHDI** » Sat Mar 10, 2018 2:01 am

Pics

soi.png

duration_ms.png

duration degree's.png

eoi.png

Pic's

by **uberderv** » Sat Mar 10, 2018 11:52 am

I don't think pic number one is from a 110hp car. I'm not on a computer at the min but I am sure the C5 file I use goes up to about 24 BTDC.

by **MothaHDI** » Sat Mar 10, 2018 1:10 pm

uberderv wrote:I don't think pic number one is from a 110hp car. I'm not on a computer at the min but I am sure the C5 file I use goes up to about 24 BTDC.

Omg, sry my bad!! I did this on a hurry... :(

corrected.png

by **jurebv** » Sat Mar 10, 2018 3:04 pm

hmm i dont get same result either...for 50mg and 2500rpm i get EOI 9,75 ATDC but on EOI Builder its 5,56 degrees, is there any topic about EOI Builder? so I can what formula it uses? i'm pretty sure my formula works