4CN Air

iTrader: (7)

Got the datalogit working, I threw the data into Excel to smooth it a little. It's nice cause you can just move the points on the lines directly and Excel modifies the table for you. Makes smoothing very easy.

I'd like some input on my values though since this is my first bit of tuning.

It didn't seem to fix my surging/bucking that I experience under 3000rpms though. Light throttle driving is still a bit of a chore. It seems liek i fix it, then it just comes back. It seems to get worse with warmer weather, but then it got colder tonight and it didn't get any better. I'm really lost, I'm thinking it's ignition rather than fuel related at this point.

I'll be changing my plugs and checking out my ignition maps tomorrow.

Thanks for any help provided.

Aeka GSR

iTrader: (4)

i dont have an answer to your question, but what excel program are you using to smothe data?

4CN Air

iTrader: (7)

just graph the data, then you can click directly on individual data points and move them up or down, this will change the corresponding cell automatically. Then when you're doen just copy and paste it back into FC Edit and "write all"

Aeka GSR

iTrader: (4)

never thought about that, awesome.

mark57

What WBO2 do you use?

4CN Air

iTrader: (7)

those aren't AFR's just injection settings. I need to get a WB02, of course I need to get my own datalogit too, lol.

mark57

I presumed you had a Datalogit, WBO2 and that you know better than to manipulate the Base Map with unconfirmed bogus values that "look pretty". "Pretty timing" may finish off your engine.

4CN Air

iTrader: (7)

OUCH!

I had it tuned by Dave @ KDR, so it was a safe tune, but we didn't get any time on the street. A couple values in the vacuum/low RPM range would go the wrong way and things like that, I just smoothed them out a little, which is recommended in the tuning articles/threads I've read. This was not done for LOOKS!

Also I was adding fuel to try and fix the surging/hesitation issue at low RPM/light throttle. The only thing I'd have to worry about destroying is spark plugs. Thanks for the bump though.

twokrx7

iTrader: (1)

It's near impossible to look at your base fuel table and make an assessment. Smoothing is a good deal after some afr tuning if you want to get everything as linear as possible, meaning you want your personal "ideal" values of afr across and up the map with minimal variation from cell to cell or run to run or when dropping or upping boost. The downer of this is that you need to recheck your afr as it will change after you make adjustments to the base map. I'm not sure it will do much for you in the low load non-idle areas and I doubt that Dave touched them. If you have some driveability issues at light load get some kind of afr meter on it and adjust the afr accordingly, you may have to mess with the accel enrichment if it's going lean on throttle tip-in.

Idle can be a different story. I discovered that making all the cells around my idle point have the same or near same fuel and timing really locked down my idle (along with a lot of other map changes and underhood deletions of course). Not sure if you would call this smoothing but it works well.

4CN Air

iTrader: (7)

I was just trying to rule out the possibility of there being some glaring problem in my maps that I just couldn't see. Accel maps were enriched a little, and my idle is good.

I'll post more useful maps once I hook up a WBO2.

DaleClark

iTrader: (55)

I've been playing with the acceleration enrichment values lately, and have smoothed out a lot of low RPM bucking. Most times it's an accel pump issue, not necessarily the map. If you have jerkiness when you suddenly give it throttle, time for the accel map.

Neat trick with Excel, though!

Dale

4CN Air

iTrader: (7)

Question with the accel map. Say you want more fuel right at tip in, you increase the left column. The right column is decay but this doesn't necessarily require an increase if the corresponding left column gets an increase does it?

4CN Air

iTrader: (7)

An Innovative LC-1 is all I would need right? Good deal on them here: http://cgi.ebay.com/ebaymotors/Innov...QQcmdZViewItem

seems liek what I'd be looking for since I don't need a gauge and the controller is nicely built into the lines. Any problems with this setup on a datalogit? Accurate setup?

RX7_Fanatic

anyone know if steve kan will tune to fix low rpm bucking and such nonsense that we all encounter with our FD's? From what i've read he does, but i wanted to know if anyone has some before/after experiences...

and keep us updated on how your smoothing goes, my damn car acts like a bucking bronco if its pissed at certain temps and such...pisses me off

edit: idle sux too most of the time

4CN Air

iTrader: (7)

Yeah Steve does primarily street tuning from what I've seen. Then if you want to add dyno tuning he'll do that too. I've heard people raving about the driveability increase and often increase in MPG after his tuning sessions.

mark57

Actually, you do need the gauge - so buy the LM-1 or the XD-1. Do you own a Commander?

4CN Air

iTrader: (7)

I wouldn't need the gauge with a datalogit though, right? I'm borrowing one now but will be purchasing one soon.

fritts

iTrader: (5)

You don't need a gauge as you can use the 0-5 volt out on the LC-1 to input into the datalogit. I am using the LC-1 with the datalogit currently. After seeing the way the datalogit records the AFR in the map, I think that a guage should only be used to look for gross AFR problems.

4CN Air

iTrader: (7)

UPDATE: discovered the surging problem!

(my spark plug end at L1 connection beside a good one)