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Old 08-12-2004, 12:43 AM   #1
hippy
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Default New Utec Software Version?

Hi all,
Saw the thing about the dtech, so while I was on the txs website I figured it would be a good time to check for a new software version for my utec. Anyways, I saw the 4.2c version and was wondering if anyone knows what the difference is between that and the origional 4.2? Thanks,
hippy
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Old 08-12-2004, 01:04 AM   #2
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4.2c fixes the misfire that happens at 100% IDC. Iíll make an official software announcement tomorrow.


-Nathan
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Old 08-12-2004, 07:53 AM   #3
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Hoorah for huge injectors that only hit 50% IDC
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Old 08-12-2004, 10:12 AM   #4
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Quote:
Originally Posted by nmyeti
4.2c fixes the misfire that happens at 100% IDC. Iíll make an official software announcement tomorrow.


-Nathan
thanks for the quick reply, I have a question about what you mean though. Do you mean that it fixes the weird glitches in the software? Like when I'd be running wot and the tps would jump from 103 to 104(even though it usually pegs at 103) and the fueling would go weird for a sec? Or is this something that only benifits certain people(like people with modded injectors)? thanks,

hippy
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Old 08-12-2004, 12:00 PM   #5
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It fixes a condition where a misfire would occur when the UTEC reached 100% IDC. Now when you hit 100% this will no longer happen. You still shouldn't be trying to run 100%.

-Nathan
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Old 08-12-2004, 01:28 PM   #6
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Nathan - what's life without risk?

I ran 97-100% for a couple of months on my GT30R - STi pinks and an FPR crush. I would never do this to or recommend this to someone else, of course. It's stupid, wrong and dangerous. Like so many wonderful things in life.

This might well explain why I could feel an occasional odd pull at max power on that setup. I never got a code, but you could feel it a tad once in a while and I saw it on the dyno once.

-Sean
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Old 08-12-2004, 03:44 PM   #7
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is this problem in the STi UTEC?

distinct hesitation at high rpms/high IDCs when running stg2. wondering if this was the problem...
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Old 08-12-2004, 08:00 PM   #8
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You will also need to enter your parameter maps in manually as there are extra knock threshold settings.

The TurboXS WRX parameter maps on our web site are suitable for Version 4.2c.

regards
Pete
(TurboXS)

Edited to reflect update to TurboXS web page.

Last edited by TurboXS (Pete); 08-13-2004 at 07:08 PM. Reason: Parameters updated on TurboXS web site
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Old 08-12-2004, 09:22 PM   #9
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Which parameters do we need to change (enter manually) in ver 4.2c? Are we under or over protected from knock?
Thnx
Chris
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Old 08-12-2004, 09:53 PM   #10
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Quote:
Originally Posted by WRX216
Which parameters do we need to change (enter manually) in ver 4.2c? Are we under or over protected from knock?
Thnx
Chris
Neither (I hope). I imagine its just additional settings.
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Old 08-12-2004, 11:54 PM   #11
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nice. since i push the edge myself i think this will smooth things out. i too feel a stumble, almost like it's waaay too rich, but only for a blink.

as soon as my tuner comes in (tomorrow.. got the fingers crossed), and i get it rigged up, i'll probably do a FPR crush.
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Old 08-13-2004, 09:28 AM   #12
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Is there an issue even if OLF is off?

Is there any chance you will be updating maps or software soon to eliminate the cross-over hesitation? Currently, it seems hesitation can be reduced but not eliminated. This is keeping me from going to OLF. Just wondering...
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Old 08-13-2004, 11:03 AM   #13
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Quote:
Originally Posted by Steve E
Is there any chance you will be updating maps or software soon to eliminate the cross-over hesitation? Currently, it seems hesitation can be reduced but not eliminated. This is keeping me from going to OLF. Just wondering...
Agreed. Even with Jorge's help, I've only gotten my map about 90% hesitation free. No matter what I do, it still happens from time to time. It's really annoying. Outside of owning a UTEC for a couple years and fiddling with it, I don't know all that much about tuning, but it does not seem ideal to have to "tune around" what amounts to an incompatibility issue between the UTEC and the factory ECU. The UTEC itself should somehow address this to make things a bit less cumbersome for the end user. Other than this minor (and possibly uninformed) gripe, it's a fantastic product.
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Old 08-13-2004, 11:24 AM   #14
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Quote:
Originally Posted by Steve E
Is there an issue even if OLF is off?

Is there any chance you will be updating maps or software soon to eliminate the cross-over hesitation? Currently, it seems hesitation can be reduced but not eliminated. This is keeping me from going to OLF. Just wondering...
steve,

since you've got a '02, you could do what i do: just turn on olf, and set the x-over to 60% tps. we don't need to worry about the stoich fueling transition issue that the '04s have, and it seems to work pretty well for me.

in the long run, a bit of "smearing" or interpolation of values, both for fuel and ign timing, would be nice as the utec takes control, and would go a long way to smooth power transitions. doesn't seem that hard software-wise either.

ken
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Old 08-13-2004, 11:40 AM   #15
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Quote:
Originally Posted by peterex
Agreed. Even with Jorge's help, I've only gotten my map about 90% hesitation free. No matter what I do, it still happens from time to time. It's really annoying. Outside of owning a UTEC for a couple years and fiddling with it, I don't know all that much about tuning, but it does not seem ideal to have to "tune around" what amounts to an incompatibility issue between the UTEC and the factory ECU. The UTEC itself should somehow address this to make things a bit less cumbersome for the end user. Other than this minor (and possibly uninformed) gripe, it's a fantastic product.
tough to make a call without seeing maps/logs...but i have crossover at 20% and have set my 10 and 20 columns in the timing map to ECU. fiddle with the fuel then in the 10 and 20 to make sure its all gravy, and voila, no hesitation.
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Old 08-13-2004, 11:50 AM   #16
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ride5000: Thats what I am doing now. It'd just be nice to be able to run injector scaling and the adjustable rev limit stuff.

happasaiyan: I tried moving the crossover everywhere, had boost and timing set to ECU (for even the whole map at times!) and had fuel spot on 14.7:1 at the transition point with no full sucess. Was it minor? Yes. But the problem is when you hover right at the transition point, it screws up. Its like the ECU is waking up or something and when you hover there it does it 3 times in a second and gets all messed up. Just lacks refinement to me.

If the crossover could be set to like 1%, it may be better. Just let the ECU deal with startup and idle.
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Old 08-13-2004, 12:05 PM   #17
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hmmm...a 1% crossover is interesting...but your fuel milage would go down.

some people have talked about the UTEC averaging (for a second or 2) the fuelling between OLF and CLF.

the methods i listed have helped me to rid my car of hesitation...i get it maybe once every few days, and its a very minor hesitation, and only when the car is cold. most of the time, the car is smooth and you cant tell.
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Old 08-13-2004, 01:08 PM   #18
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Heck, I'd gladly tune every darn cell in the map to get my MPG back to stock if the hesitation was never there. The fun part is tuning, the bad part is the hesitation, even if its only once in a while. Even passengers noticed it.

I guess the MPG stuff could get tricky in changing weather conditions...
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Old 08-13-2004, 01:31 PM   #19
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Quote:
Originally Posted by Steve E
ride5000: Thats what I am doing now. It'd just be nice to be able to run injector scaling and the adjustable rev limit stuff.
steve, i am pretty sure it works still. i have a 7500 rpm limit in effect, despite my 60% crossover..

i haven't played around with injector scaling, but from what i know you do need to have OLF enabled, but you don't necessarily have to be past the threshold point in order for it to scale the maf voltage and pass that on to your ecu. for fine tuning (ie, vs. rpm) you can change the zero column values, but you don't have to as long as the injector scaling is in the ballpark. once you're above the threshold, it scales the background MAF vs RPM fuel map built into the utec OLF algorhythm.

again, i haven't tried scaling (but i will be soon when i crush the FPR), so take what i've said with a grain of salt.

ken
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Old 08-13-2004, 02:04 PM   #20
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ken, do you have OLF off or just set it to crossover at 60%? I am not positive, but it seems that the rev limiter does not change with it off. I could be wrong, I definitely don't notice the "soft limiter" kick in though. Maybe I'll evperiment with that a touch.

The 60% crossover thing is where I start to mess around more. Think about it, at 60% TPS, you are never using any load site under about 40%. My crossover (with OLF off) is 5%. This allows me to control timing at lower loads which makes for a smoother tune with no sudden step in power. I run ECU timing up until 2000 RPM and ECU boost until 50% TPS. I then ramp up boost in th 60-90% columns. The 90 and 100% columns are the same. So, I get low boost at low throttle, with safe AFR's and smooth timing that I can adjust while having a seamless transition into the good stuff. Nobody seems to do this but I find I have my best tune this way, smoothness at least. My theory is this is the closest wat ot get to a standalone without messing with startup and all that garbage. OLF is the next step but it still needs work IMO.
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Old 08-13-2004, 02:49 PM   #21
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Quote:
Originally Posted by Steve E
ken, do you have OLF off or just set it to crossover at 60%? I am not positive, but it seems that the rev limiter does not change with it off. I could be wrong, I definitely don't notice the "soft limiter" kick in though. Maybe I'll evperiment with that a touch.
oh no, i sure DO have OLF turned on! and it IS set to kick in at 60%.
Quote:
The 60% crossover thing is where I start to mess around more. Think about it, at 60% TPS, you are never using any load site under about 40%.
i'd have to disagree with that--i have plenty of logs with lower load sites. think about it.. aren't there times when the throttle is depressed past 60% and the manifold pressure is <10 psi? certainly in the lower rpms ranges, before the boost threshold, and sometimes in the upper rpms (generally only as a "pass-through") during transitions.
Quote:
OLF is the next step but it still needs work IMO.
i do agree with you there... from a thread a while back it was suggested that when the utec goes into OLF it should send a 100% throttle position signal to the oem ecu. that way the oem ecu won't be "thinking" that the mixture should still be stoich when it is not, and the LT and ST fuel trims should be more stable... essentially like it was an extension of vaus/ed's MBC-friendly gadget.

ken
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Old 08-13-2004, 03:45 PM   #22
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Quote:
Originally Posted by ride5000
i'd have to disagree with that--i have plenty of logs with lower load sites. think about it.. aren't there times when the throttle is depressed past 60% and the manifold pressure is <10 psi? certainly in the lower rpms ranges, before the boost threshold, and sometimes in the upper rpms (generally only as a "pass-through") during transitions.
OK, I was a little overboard there. Especially with a bigger than stock turbo.

Either way, the UTEC rocks and I can't complain. There are so many ways of setting it up and tuning it, it consumes a lot of my time trying different things (which is fun). The OLF stuff seems like it could be great and is frustrating now, at best).
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