is this possible on the 95 OBD1 ecu?
Its possible on any PCM with the correct software (think OEM)
but its not possible with whats available for the 95 PCM in the aftermarket.
As for 97-up using HP, there is so much stuff they simply ignored or left out its sad.
When I asked about this directly on their site they replied "no there really isn't".
I know that to be false. Its easy to know there was far more timing info just released with the new update. And there have to be EGR tables for cars equipped with EGR. Even more there has to be some sort of calibration data for cars with traction control. Yet none will ever be decoded because there isnt enough people interested in it to make it worth the investment.
I love that they finally came through with the support we now have. Its better than nothing at all.
But I have always believed that a job worth doing is worth doing right, and that has yet to be done.
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I have to agree with Todd.
I am a little pissed off at HPTUNERS right now - it has been basically stated the PCM cannot accept Axis Scaling... which I can accept.
What I cannot accept is why they cannot then just sit down and at LEAST re-scale the tables for us to 8200 rpm. This would make a world of difference for me from 6800 - redline. Yet they refuse to do it and I'm almost certain it wouldn't take them much effort to give 100% of us with these PCM's an added benefit that we actually need.
I also cannot accept that they refuse to at least offer a 2 bar upgrade to the pre2k PCM's.... the GMSC Reflash calibration clearly has a 2 bar map on it for spark can they not at least offer us the option of spending an extra credit to re-scale the charts to accept 2 bars of data? Do I REALLY need to squeeze 3 bars of map information into the space of a 1 bar? GM did all the frickin work with the GMSC Tune can they not just follow it and apply the same to the pre2k PCM's? I'm not asking for Map Vs Rpm tuning here (god forbid) I just want 2 bars of resolution to tune on. Jeeze.
The more I use the software the more I realize its limitations and the more pissed off I get. There are many features I know they will NEVER give us including autotune or livetuning... and what ticks me off the most is I paid the same price as the guy beside me only they went and coded in all the features for them.
I can appreciate what HPTUNERS has done for the J-body community, they gave us something that we wanted, but they only gave us half of what we NEEDED.
If I cannot at least manage spark and timing from 6800 rpm - my new max redline of 8200 rpm's then what the heck is the point of even raising it? It's like playing russian roulette with my engine which, I'm sorry folks, I'm not willing to play games with.
I just don't know anymore.
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
Why not just throw in the towel and go Megasquirt? You already have HPT to eliminate codes and control spark.
-
"Youth in Asia"...I don't see anything wrong with that.
use megasquirt to run uel and spark and use hpt to shut off the sensors that would throw codes
well,better then what hpt gave us 2.2 cobalts, basically we got a door in the face. thats ok though since we have better companys starting to step up to the plate now
i posted in the thread...
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SweetnessGT wrote:I have to agree with Todd.
I am a little pissed off at HPTUNERS right now - it has been basically stated the PCM cannot accept Axis Scaling... which I can accept.
The only way that it would be true that the PCM could not be rescaled is if it were hard coded in a Rom chip in the PCM.
I cannot prove or disprove that or anything like that.
I can say it goes against all my experiences with most PCMs, so I choose not to believe them.
I can say that we can see it actually being done with the SC reflash, so I choose not to believe them.
So I cannot "accept" them at their word.
I can accept that they will never bother to remedy the situation.
And I am happy to have the capabilities I got from them because backdating everything to 95 only works for half of what I want to do, anyway.
The system is not useless, even for timing. How much timing change do you really expect to need from 6800 on up anyway. Everything I do is always the same up there for all rpm even if I do have the possibilty of changing it.
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This may be way wrong but if it was hardcoded then how was it possible to make a GMSC reflash and along the same lines how is it possible for us to reflash a 2k+ 1bar system to a 2 bar system using hpt. I call
FWIW I just read the HPT thread. Chris' (from HPT) answer makes sense based on what I know of GM code. In the OBDI systems the table size is defined in the table. The minimum and maximum range of the table are hard coded in, and the number of "steps" between max and min are determined by dividing the number of table rows or columns into the range needed. To re-scale the table you need to change the max value, the min value, the section of code which does the division, or all three. And in order to add more entries to the table you need to physically move all of the code which resides after the table. After this many of the instructions in the code will refer to information that's been moved, so all the instructions must be changed to point to the correct new locations. It can be not too hard, but it isn't something which should be done without some way to make sure everything is moved correctly.
If the table scaling is contained in the calibration section as variables then the code is already written to allow the table sizes to be redefined without moving code.
Is there a value called something like the "extended rpm slope?" That would determine your timing after the top line of the spark table is reached.
-->Slow
Wrench Monkey wrote:This may be way wrong but if it was hardcoded then how was it possible to make a GMSC reflash and along the same lines how is it possible for us to reflash a 2k+ 1bar system to a 2 bar system using hpt. I call
Because its a different OS, not just a different calibration...
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