TunerPro User Forum

dizwiz24

I would love to be able to display data, of my choosing, from the datastream live onto an iphone in my line of sight

Particularly knock retard.

Does this functionality exist ?

dizwiz24

Hello I am trying to tune out a rich idle smell on a supercharged 93 $DA2 corvette with 224/236 cam. No Cats or emissions equipment. Its my understanding some overlap in the cam can cause some false air going past the o2's and signaling a false lean condition - causing ECM to dump fuel. My question ...

dizwiz24

Does anyone have any recommendations on a minimum pulse width setting for 60 lb injectors? The goal is to get more controllable fuel trims (ie. BLM's closer to 128), less split BLM's, etc. I heard someone say once that you dont want a minimum pulse width below a certain value or it would cause issue...

dizwiz24

thanks!

dizwiz24

Hi How would I find out what 'byte #' corresponds to the A/C pressure output on a $DA2 tune? 93 corvette I have never been thru/ dont know how to read the actual 'code'. I am datalogging my wideband o2 sensor thru my A/C pressure transducer such that it shows up alongside (referenced) to my other op...

dizwiz24

Hey guys, I was just curious what happens in this scenario: Imagine I have commanded 20 degrees of timing at a given MAP/ RPM Now, imagine I have knock or traction control commanding say 25 degrees of timing reduction.... What happens? Does it go to 0 degrees of timing? Or does it generate an error ...

dizwiz24

I know its ben a year, but i wanna chime back in I put different headers on (arh 1 7/8" vs. Tpis) and there is less split blm issue. the new headers have the 02 bungs in a slightly different location. I like the suggestion on playing with fuel/spark to get the most idle vacuum. Thats how we use...

dizwiz24

Split BLM at idle might get better playing with IAC air flow. distribution issues seem to play a big role in that. http://www.thirdgen.org/techboard/diy-prom/356830-miniram-split-blms.html Also read "Vern's tale on post #8. Idle stink can get better by lowering the o2 constants by small amount...

dizwiz24

I have a supercharged 93 corvette lt1. It is speed density (came that way stock). I notice my $DA2 definition file has listed left/right rich/lean O2 threshold vs. airflow tables. Theres a couple sets of these tables, one for left, one for right, and then ones for fast and slow. If I adjust these ta...

dizwiz24

I have a 224/234 114 LSA cam on my supercharged 93 vette ($DA2). I dont run cats to minimize exh backpressure to maximize supercharger performance. There is a nasty exhaust smell at idle that im having a tough time getting rid of. BLM's sometimes split (and then come back together), but usually are ...

dizwiz24

the way i have it setup, it won't rev up to whatever the limit is when the clutch is depressed, only cut fuel or spark if above the limit you want. ah... so if Im using cruise control (below 4000 rpm...or whatever the limit is... lol) everything will still work fine. This allows engine rpms to 'fal...

dizwiz24

i've done this with nAst1, actually turned it into a 3-step limiter: step 1 = not moving, clutch disengaged, for launching at high throttle but not high RPM step 2 = moving, clutch disengaged, for shifting without lifting the throttle step 3 = max RPM to allow before cut regardless of MPH or clutch...

dizwiz24

Ive heard of some of the mitsubishi eclipse / evo guys do stuff like this. Ive heard this is available on their common tuning software called DSM-Link or something of the sort. Essentially a 'drag race' mode is entered (ie. uploaded before drag race) and whenever the cruise control kill switch (on c...

dizwiz24

Does anyone have any tips on doing a 2 bar MAP conversion on a forced induction 93 corvette? Ive been using a $DA2 definition file. Is it as simple as installing the 2 bar MAP sensor (in place of the stock 1 bar unit) and then just halving the VE tables? I know theres a couple people who have done i...

dizwiz24

Ok this is good info as my dfco is set to engage below 1200 rpm, which you advise against.

I can zero that out.

People on other forums say I should just zero the whole dfco out to eliminate it entirely

dizwiz24

I wanted to ask about where my DFCO (deceleration fuel cut off) settings should be at for best performance (smoothness and fuel economy). I have a bunch of scalars and tables for this on my $DA2 definition file. I have: DFCO enable RPM DFCO disable RPM DFCO enable MAP DFCO disable MAP DFCO diasble R...

dizwiz24

I wanted to see if anyone else on here has noticed this. If I modifiy the PE fuel adder % vs. coolant temp it has a much bigger effect on WOT AFR than if I modify the PE fuel adder % vs. RPM table. Example: If I take out 10 % from the PE fuel adder % vs. coolant temp and then try to add 10% back in ...

dizwiz24

used in closed and open loop. it's for periods of rapid throttle movement and only takes effect for a very short amount of time. differential is being used in place of "delta". ssentially how far has the TPS moved since the last time it was checked. Thanks for the info. This sounds like i...

dizwiz24

Im getting an occasional part-throttle 'hiccup' under mild boost. This occurs in between about 2400 and 2800 rpm. This would be a 100 kPA (max MAP value situation ). Im making 4 psi by 2800 rpm. I suspect its leaning out as its still in closed loop still trying to make '128'. What are my options, un...

dizwiz24

I have a question about this table. Its set up as a 2 column. % TPS vs. % fuel adder. Currently the values are pretty close to 0 for all % TPS. Does this table only add fuel for a brief instant when you press the gas, or does it add fuel the entire time you are at that % TPS. Im assuming it operates...

dizwiz24

I was in the middle of a discussion, on another website, about when exactly VE table values affect fueling on a $DA2 speed density tune for 93 lt1 vette. Some people stated VE table values only affect fueling under open loop operation. Open loop would also include power enrichment operation as well ...

dizwiz24

Is there any advantage to setting cell boundaries such that say...highway operation (65- 80 MPH) is the middle of the boundary? With current mods, I cruise about 2050 RPM at 65 MPH. Also, MAP is typically (on flat road, w/ consistent throt. input): 51 to 53 kPA. However, I see from my data that it d...

dizwiz24

I ntoiced a Fast O2 rich/lean threshold currently set to 0 mV ( I got the tune from a vendor specializing in the mods I have). Does this sound correct for this to be set at 0 mV? Any help is appreciated! Stock bins are not. Sounds like a way to run open loop, while in closed loop... that would be i...

dizwiz24

I have a 93 lt1 corvette w/ speed density original equipment ECM. Im using $DA2 definition file. I noticed a 'stoichiometic AFR' value. Currently, its set to 14.7:1. If I put wide band O2 sensors in place of the stock narrow band sensors, Can I change this for other fuels? ALso, I noticed a table (a...

dizwiz24

Ok. I sent you a pm

dizwiz24

Im finding my supercharged/meth injected 93 vette is pulling timing not related to knock retard... The service manual confirms that the ecm can pull timing based on knock and inlet air temp. I've relocated my iat sensor to ambient air (vs. Supercharged air) but still get some knock retard. There is ...

dizwiz24

Ill try to get the datalogging feature to work on tunerpro. Ill let you know when I generate some data, id lov e to get these dialed in perfect.

dizwiz24

yes, I can make a histogram. I can plot just about anything in excel. do we have to use the datalogging feature on tunerpro to get this data? I think I had some issues with this feature, on tunerpro, awhile back. Ive been using datalogging from TTS datamaster, and using tunerpro to make changes to m...

dizwiz24

robertisaar,

What is the procedure for using tunerpro histograms to calculate/apply VE correction factors?

Id love to know how to do it.

dizwiz24

Hi, im getting to use the file fueltrim.exe, that wad once supplied to me by someone on here. This file allows you to input a bunch of rpm, map, and blm numbers to then output a series of correction factors. I ran this program, based off of data from a 1.5 hour interstate drive. There were some hill...

dizwiz24

Im currently using $DA2.xdf file to read/modify my bin's. I know there is also a $DA3.xdf file, but I havent messed around with this. Is the $DA2.xdf, in the definition file section of this website, the most up-to-date? Or is there something else I should be using, with more tables, etc., to tune my...

dizwiz24

I have a question about $DA2.xdf, for 93 GM corvette lt1. The gm lt1 v8 enginehas 2 banks of cylinders, each with an 02 sensor, left and right, but yet there is only one VE table in the $DA2.xdf table. What if I wanted to correct split BLM's (between left and right bank)? I dont think there would be...

dizwiz24

I just pulled tried this and it works. I can backcalculate a voltage based on the equation you gave me and knowing that volts = 5N/255 I can then look in a table, supplied with my wideband sensor, to see what AFR that voltage corresponds to. robertisaar, I didnt think any fueling/ ECM changes result...

dizwiz24

im assuming N is volts... what im doing with the A/C pressure sensor is as follows: I removed my A/C (hence no need for A/C pressure sensor) and hooked up the 0 to 5 volt output of my AEM UEGO wideband O2 sensor into the place of the A/C pressure sender (which is also 0 to 5 volt output). This way w...

dizwiz24

robertisaar,

It says DA2.ads
version 1.1 92-93 LT1

I use the tunerpro data logging software to look at datalogs...

Sometimes I also use TTS Datamaster to look at the datalogs..

dizwiz24

My A/C pressure output is an analog 0-5 volt output, that shows up as a pressure when a datascan is made on my 93 lt1 corvette. Id like to know what equation (what conversion factor) the $DA2 program is applying to translate that volts to pressure. Id like to be able to back calculate the volts from...

dizwiz24

robertisaar, Im assuming when you mentioned MAT, that you meant MAF. The only thing about that explanation is that the 92-93 cars, on $DA2, are all speed-density. No MAF. If compensation counts are related to the MAF, why would that table be in a $DA2 for 92-93 speed-density LT-1 cars? I think its f...

dizwiz24

I noticed a table called MAT compensation counts vs. MAT. As MAT (manifold air temp) increases, compensation counts appears to increase and then level out. Does anyone know what this is and what will be affected if I change it (ie. does a higher compensation count add or decrease fuel as manifold ai...

dizwiz24

Ok, I found one table, under $DA2, for MAT Compensation Counts vs. MAT (manifold air temp = same thing as IAT - inlet air temp) The compensation counts appear to increase and level out as MAT (measured in degrees C) increases. Does anyone know what compensation counts affects? (ie. if I change the v...

dizwiz24

What sensors are giving active input - that is affecting the fueling, during closed loop operation...?

Is it solely o2 sensors, and TPS?

What about IAT (inlet air temp)? I find no tables in $DA2.xdf for fuel % vs. IAT.

dizwiz24

I want to modify my fuel cutoff on my LT1 to account for some new mods. Anyways, I have the following options: fuel cutoff speed (a vehicle speed): this is set to 255 MPH - which I will never achieve fuel cutoff 1st gear (eng speed): 6300 fuel cutoff 2nd gear (eng speed) 6300 fuel cutoff 3 thru 6th ...

dizwiz24

Im working with a $DA2, stock ECU on 93 corvette, w/ procharger, cam, and long tube headers. Is there anyway to adjust individual cylinder fuel trims? Like to correct split BLM's, or add a little extra fuel to that one cylinder on the drivers side that fires right after the cylinder next to it (and ...

dizwiz24

I recently installed a procharger on my mod'd 93 LT1 vette. Im having some issues with knock retard. Not sure if real, or fake. Either way, I need to do some hard core datalogging. My Auto X-Ray frame scanner (that plugs into the ALDL) doesnt have the resolution (ie. it doesnt capture every frame). ...

dizwiz24

INT is another thing to look at, your BLMs could be around 128(which is fine), but your INT could be anywhere from 96-172(depending on the factory settings), if you stay in that VE cell long enough, the BLM will adjust until the INT is close to 128(usually within 4 in either direction), then you wi...

dizwiz24

My question is how would one check and see what the current variable (ie temp) defined as high temperature is currently set at.

It doesnt appear in my $DA2 definition table. I cant see it or change it.

I imagine what ever it is is fine, Im just curious what is considered high temperature.

dizwiz24

Im tweaking a tune that was supplied to me by a guy with a similar setup on his S/C 93 LT1 6spd. One of the Tables/Functions in my DA2.xdf definition file is: TPS threshold for WOT (HI cool). If I open it up, it has a list of RPM's and a %TPS that can be changed. There are currently values such as: ...

dizwiz24

Ive got a baseline tune from a similar car and am going to be taking my car to the dyno thursday to tune. This is a 93 LT1 corvette w/ 6speed manual. Its a speed-density setup w/ hotcam, ported heads, LT headers, and, of course, ATI procharger w/ 60 lb/hr injectors. Im running 6psi boost. Idle is fi...

dizwiz24

I tried again datalogging with TunerPro RT tonight using the cable I had with TTS Datamaster (Which is an ALDL cable with serial connector and USB converter on it). This was with the cable connected to the ALDL port. It still did not work. I had browsed and selected the $DA3 1992-93LT1.ads file. I t...

dizwiz24

Mark,

If I understand you correctly...With an ostrich on it, I will not be able to datalog from the ALDL diagnostic port?

But, with a chip instead of ostrich inserted into the ECM slot, I can datalog from the ALDL port?

dizwiz24

Hi, Im having some issues using the datalog feature of TunerPro RT. I have a 93 LT1 corvette w/ ostrich adapter plugged into my ECM chip socket. I am able to connect/download/upload changes to Ostrich emulator fine. The issues I have is w/ the ALDL data logging portion. I cannot connect to ECM and g...

TunerPro User Forum

Search found 55 matches

Any bluetooth obd-1 $da2 for real time iphone display?

$DA2 speed density. O2 Rich/Lean Thresh.What gm/sec for idle

minimum pulse width? 60 lb injectors, $DA2

how do I find what 'byte number' corresponds to A/Cpres $DA2

what if a tune tries to reduce timing below 0?

does $DA2/spd dnsty use rich/lean o2 thresh vs. airflow tabl

tuning out the smell of a bigger cam... tips on a $DA2?

possible to do a 'no-lift-shift' on a $DA2

any tips on doing a 2 bar MAP conversion on a FI 93 $DA2 vet

DFCO settings on a 93 lt1 corvette w/ $DA2

$DA2.. modifying PE fuel adder % vs. coolant has bigger effe

$DA2..occasional part-throttle hiccup under boost...

$DA2 def: Accel Enrich vs. Differential TPS (Mult).when does

under what conditions does VE table effect AFR? $DA2

$DA2. 93 lt1-vette. Any advantage to centering cell boundari

Re: $DA2 on 93 lt1 vette, stoichiometric AFR - can this be m

$DA2 on 93 lt1 vette, stoichiometric AFR - can this be modif

$da2 on 93 lt1 vette: no spark retards vs. inlet air temp ?i

automatic ve tuner fueltrim.exe for $da2.xdf

most up-to-date $DA2 def file for 93 corvette lt1 6spd?

$DA2, for gm lt1 v8, 2 banks, but only one VE table?

any idea what 'byte' is giving me my A/C pressure, $DA2

MAT compensation counts vs. MAT - what is this? $DA2 .xdf

what sensors give active input during closed loop, 93 vette

reseting rev limiter on a DA2 file. fuel cutoff and resume ?

$DA2, anyway to adjust individual cylinders fuel trims

ostrich and datamaster datalogging, how to? 93 lt1 vette SC

What is this?...TPS threshold for WOT (HI cool)..$DA2,93 LT1

tunerpro RT supercharged 93 LT1.dyno thurs any tips?

problems datalogging - 93 lt1 corvette w/ ostrich adaptor