[Diy_efi] tuning question

[Tim Marsteiner]

Interesting that you mention IAT. 

I just finished a little excel graph comparing my
bikes factory setting for fuel correction for air temp
against a standard Motec curve and the Hydra EMS curve
(http://www.mrcontrols.com/installs/nemesis/tuning.htm)

You can view the graph here:

http://superxtune.com/AirTempCorrGraph.jpg

My bikes curve(sagem) seems to be pretty whacked.

Anybody ever seen anything like this?

Thanks,
Tim


--- Michael Richards <michael at fastmail.ca> wrote:
> Some of your results will depend upon the accuracy
> of your WBO2. On my 
> Techedge I typically see within 0.1-0.2 points of
> repeatability given a 
> specific load site and provided that all the
> corrections are working 
> properly. If you don't have an accurate IAT signal
> or CLT for example 
> it could account for the variation you see. Also be
> aware that ignition 
> advance will have an effect on the measured AFR.
> 
> -Michael
> 
> > Is +/- 5% variation within the realm of acceptable
> for
> > a engine of this type?
> > 
> > I have heard that the wideband O2(NTK) reading can
> be
> > made more accurrate by correcting for EGT. Does
> anyone
> > have an idea of what AFR correction I might apply
> > based on EGT?
> > 
> > 
> > Thanks,
> > Tim
> > 
> > 
> > 		
> > __________________________________
> > Yahoo! Mail Mobile
> > Take Yahoo! Mail with you! Check email on your
> mobile phone.
> > http://mobile.yahoo.com/learn/mail
> > _______________________________________________
> > Diy_efi mailing list
> > Diy_efi at diy-efi.org
> > http://lists.diy-efi.org/mailman/listinfo/diy_efi
>
_________________________________________________________________
>     http://fastmail.ca/ - Fast Secure Web Email for
> Canadians
> 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/diy_efi
> 

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com