This question has been on the uberdata forums for a week unanswered.

I notice when i click on 3 bar MAP from stock, the numbers remain the same, but the tables change. Will it run my car fine into boost like this, or do i need to change the numbers appropreately?

What do those numbers mean anyway...? I'm such a n00b. =\

 

http://uberdata.pgmfi.org/foru...=3853

replied in there

 

I'm not sure if there's a short cut (maybe redo the boost efficiency and boost timing retard with a much larger value?), but it looks like you'll have to manually recalibrate the boosted portions of the fuel AND ignition timing basemaps by starting conservative and slowly checking/working your way up the boost columns as you go.

The columns are manifold pressure readings and the rows are RPM. The ECU uses those two inputs, combined with an air temperature measurement to determine mass air flow going into the motor. The ECU looks up the basemaps for injector base pulsewidth and ignition timing values (the numbers you're changing in the tables) to output to the injectors and ignition control module.

 

Okay, tuning is new to me, i was just using BBKA's MAP and getting good numbers on my car, 14s driving, 11s at WOT.

I get everything you said, i just don't get what those numbers actually mean, the numbers that the MAP and RPMs correspond to. It doesn't really matter what they mean, i know what they do, i guess they're just random numbers that don't actually mean anything, just a scale to work with. Hard to explain what i'm thinking i guess.

I guess i'll read about a base map on uberdata some and make something from it, this will be a good time to go to 1.7 i suppose.

One thing with 1.7 is there's a glitch on all of my computers, in top left corner in the middle of the 4 boxes is a number not in the boxes, it's in the middle, is this normal? If not, i'll get a picture.

 

ya that # in the corner is normal
i have no idea why its there either but it doesnt seem to cause any problems

 

Starting from scratch works fine. But, it still leaves the 2bar boosted column with values that half of what they're supposed to be.

The fuel basemap numbers are arbitrary on Uberdata. The ignition timing values are absolute. The values are exactly what the ECU outputs in degrees of crank angle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by O16581724 5 2 5 &raquo;</TD></TR><TR><TD CLASS="quote">I get everything you said, i just don't get what those numbers actually mean, the numbers that the MAP and RPMs correspond to.</TD></TR></TABLE>

I haven't been inside Uberdata in a few months, but in tuning, you can't get focused on any set unit. Just the other night (cold cold night), I was tuning cold start on a car and couldn't figure out why the coolant temp sensor wouldn't get any warmer than 90°

 

They are basically just numbers for all purposes. The higher the number the more fuel, that is all you really need to know as far as what they mean. They don't mean pulse width or ms of the injector, they are just numbers.

 

That's the answer i was looking for, i just wanted a better understanding of those numbers. I'll figure this tuning **** out, unless you want to help "IN VTEC".

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by O16581724 5 2 5 &raquo;</TD></TR><TR><TD CLASS="quote">Okay, tuning is new to me, i was just using BBKA's MAP and getting good numbers on my car, 14s driving, 11s at WOT.

I get everything you said, i just don't get what those numbers actually mean, the numbers that the MAP and RPMs correspond to. It doesn't really matter what they mean, i know what they do, i guess they're just random numbers that don't actually mean anything, just a scale to work with. Hard to explain what i'm thinking i guess.

I guess i'll read about a base map on uberdata some and make something from it, this will be a good time to go to 1.7 i suppose.

One thing with 1.7 is there's a glitch on all of my computers, in top left corner in the middle of the 4 boxes is a number not in the boxes, it's in the middle, is this normal? If not, i'll get a picture.</TD></TR></TABLE>
the number in the corner is the average of the cells around it. This is the actual value the ecu looks up from the table. Also like 93turbo16 said they are just arbitrary numbers that have a number of different corrections applied to them including ect, iat, etc.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">Starting from scratch works fine. But, it still leaves the 2bar boosted column with values that half of what they're supposed to be.

The fuel basemap numbers are arbitrary on Uberdata. The ignition timing values are absolute. The values are exactly what the ECU outputs in degrees of crank angle.</TD></TR></TABLE>
I don't believe the ignition values are totally absolute set in stone either. It was found that gear correction in the stock honda ecu actually corrects timing which means there is a correction factor even applied to your timing values.

 

You have to remember that it's before any correction factors. That's why they call them basemaps.

 

Sorry i just thought that when you said that is what the ecu actually puts out as the ignition timing you thought it outputed exactly what is in the map, which it doesn't always do.

 

My fault for not thinking to clarify. My choice of words was a little flawed.

 

no problem