No VE Tuning?
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From: Denver International Airport, Colorado USA
Asking with all due respect, not to start an argument.
Thanks.
..WeathermanShawn..
Shawn, I have a draft of a paper I wrote about it over a year ago. I never finished it, but I think it should cover enough details for you to form your own opinion. You want it? I do warn you though, it's like 13 pages of linear algebra...
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From: Denver International Airport, Colorado USA
Well, I read your Speed density paper from start to finish.
Marcin no doubt your brilliant. I got through Calculus-3 and differential equations, but if I could make B's and C's I was lucky. So it is not easy reading.
No sarcasm here, but for 99% of us the 'cliff note' summaries of your work would really help to educate many of us as to your findings.
Either that or you need to market a new tuning software program. I like your ideas of VE..temperature bias and using STD in a program.
You just need to condense your knowledge for the rest of us mortals.
Can you briefly elaborate on your opposition to Virtual VE?
Thanks.
..WeathermanShawn..
.
Marcin no doubt your brilliant. I got through Calculus-3 and differential equations, but if I could make B's and C's I was lucky. So it is not easy reading.
No sarcasm here, but for 99% of us the 'cliff note' summaries of your work would really help to educate many of us as to your findings.
Either that or you need to market a new tuning software program. I like your ideas of VE..temperature bias and using STD in a program.
You just need to condense your knowledge for the rest of us mortals.
Can you briefly elaborate on your opposition to Virtual VE?
Thanks.
..WeathermanShawn..
.
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Joined: Nov 2006
Posts: 620
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From: Katherine N.T Australia
The Raw data is still there if you want to use it after all.
One good thing is at least EFI LIVE has embraced the stock programming rather than hacking it and going old school like HPTuners has done.
"Boosted" differences were referenced a few times. Are you guys saying that if you are running boost (+ H/C) you definitely SHOULD tune both VE and MAF?
On a side note; Where is a "beginners" write up for calabrating the MAF?
On a side note; Where is a "beginners" write up for calabrating the MAF?
http://redhardsupra.blogspot.com/200...explained.html
please comment, discuss, or just rip it a new one...
please comment, discuss, or just rip it a new one...
Teching In
Joined: May 2007
Posts: 43
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Did you get over 50 hits in the main cells you wanted to tune?
Did you use a Wideband? And did you disable fuel trims when doing it?
Did you disable the MAF?
Each one of those is mandatory when VE tuning. Miss one and your wasting your time.
VE tuning is not hard. It amazes me most tuners outside of AUS still haven't seen the light of SD tuning. Hell we even had our high end performance models come out from factory MAFLESS SD tuned here.
Did you use a Wideband? And did you disable fuel trims when doing it?
Did you disable the MAF?
Each one of those is mandatory when VE tuning. Miss one and your wasting your time.
VE tuning is not hard. It amazes me most tuners outside of AUS still haven't seen the light of SD tuning. Hell we even had our high end performance models come out from factory MAFLESS SD tuned here.
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Verdad Gallardo TECH Enthusiast
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From: Denver International Airport, Colorado USA
You are attempting to filter out throttle transients based on changes in TPS % per millisecond. Most of the tuning software gives you that ability. You can also filter out Fuel Cell >19 (decel, WOT, EVAP Purge, etc)..
Theory being abrupt throttle transients are not representative of a true VE RPM/MAP cell.
As far as accurate street SD/VE tuning, seems like the people who can do it successfully have little to no elevation changes on their course and can keep ECT/IAT constant during logging. Any elevation, ECT, or IAT change and you begin sampling multiple air density samples for the same RPM/MAP cell. BARO may only update at key on or open throttle on a sample run, so it can skew your results.
I.E...You can get big swings in your VE values (STD) for the same RPM/MAP cell.
By the way Marcin..great work on your recent work. Still thinking it over.
..WeathermanShawn..
Theory being abrupt throttle transients are not representative of a true VE RPM/MAP cell.
As far as accurate street SD/VE tuning, seems like the people who can do it successfully have little to no elevation changes on their course and can keep ECT/IAT constant during logging. Any elevation, ECT, or IAT change and you begin sampling multiple air density samples for the same RPM/MAP cell. BARO may only update at key on or open throttle on a sample run, so it can skew your results.
I.E...You can get big swings in your VE values (STD) for the same RPM/MAP cell.
By the way Marcin..great work on your recent work. Still thinking it over.
..WeathermanShawn..
eh, dyno tuning with a wrong methodology is still gonna return crappy results. they're gonna be less peppered with noise, but ultimately it's still crap. read into the paper, i think i've explained it at least partially in there, it's the whole 'proper attribution' bit.
