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10-28-2013
From what I can tell its as simple as copying L67 tables into my tune and buying the sensor. I also know it's only a back up safety if the MAF goes out but safeties are put into place for a reason. What have y'all done? One bar or two bar?
I forgot to mention I have a mechanical gauge, this is more for the PCM.
TIA,
Slim
Last edited by slimguns; 10-28-2013 at 08:47 AM. Reason: Addition
10-28-2013
1 bar or no map sensor is my typical solution. I usually dont mess with anything on a GTP either.
10-28-2013
I added the 2 bar map when i did my topswap. I swapped the harness connector and updated the map tables in the bin file. make sure that all the tables that deal with MAP are set correctly as well. now that you will be able to read above 100 kpa, your old tables may not have proper fueling in these areas.
10-28-2013
lolwutOriginally Posted by Z34Phoenix
there is no such thing as "map tables". You either have a 2 bar operating system or a 1 bar operating system, there is no (easy/tested) way to change one over.
10-28-2013
Sounds like more hassle than its worth. I'll stick with my MAF and a mechanical gauge. Thanks guys...
10-28-2013
Dude I don't know why you mess with people on here. If you open a bin file you will have tables for the map sensor. Your scaler, offset, max, and one other I can't remember at the moment. All you need to do is change these to match that of a l67. You then need to make sure fueling is correct in your other tables so that now when you exceed 100kpa the fueling will be correct.
I am not speculating on how to install a 2 bar map. I have one in my car right now! It is functioning perfectly. Anyone who knows how to splice in the new connector and has access to a tuner can change over to one. There may be a year car that all the map tables are not mapped. In that case it would be difficult. But for a fact, my 98 Z34 bin is working with the 2 bar map, my buddy changed his 96z34 to accept a 2 bar map when he installed a sc, and he later changed to a 97 z34 file when he converted to a 4t65 and it also accepted the upgrade to a 2 bar map.
10-28-2013
What do you "get" (other than a safety) from it? Doesn't the MAF do the heavy lifting?
10-28-2013
Boost will be recorded in your logs.
Other than that, nothing.
10-28-2013
The ability to have a finer control over your tuning.
10-28-2013
I must say I like that idea....
Guess I'll look into it
10-29-2013
I can promise you this isnt possible. I have been involved in the maping process of map sensor stuff at one time even.
The fact you "just moved some stuff over, like the scalar oh I cant remember right now" is further proof you are making stuff up.
Define finer control, and define tuning in this context. Im real curious to see why you think the map sensor has any say in anything.The ability to have a finer control over your tuning.
10-29-2013
Well since you have not figured out how, here you go.map settings.JPG
Also I am so sorry that i could not remember every table off the top of my head. The picture above shows the MAP section and tables i changed to allow the L36 bin to properly read the L67 Map sensor. as long as your bin has these tables it is possible to swap to the l67 sensor. data log.jpg This is a data log showing the map sensor returning correct values.
Most people on here know you are just here to stir the pot and play devils advocate. I am here to help others by sharing what i have learned and learn more from others. you say its not possible. I am providing proof that it does work. If you have specific examples of issues you have seen or platforms it does not work on please list them.
I define "finer control" as being able to adjust fueling based on MAP. the main file here is the VE. not all bin files use VE as multiplier. On my 96 DOHC the factory file used VE when calculating fueling in PE. Most 98+ files i have seen VE is not always active or even enabled as a back up for MAF failure. In tiny tuner you can activate it and use its values to be incorporated into fueling. I found this to be very useful when tweaking AF with a wide band installed. also if you do a proper VE tune, you can have a fail safe tune if your MAF sensor dies.
Last edited by Z34Phoenix; 10-29-2013 at 09:58 PM.
10-30-2013
I highly doubt this. No GM PCM I have ever found uses VE in power enrich over the MAF. It may be a creepy 96 thing, but unless you can explain to me the hysteresis between those 2 tables I again do not believe you.I define "finer control" as being able to adjust fueling based on MAP. the main file here is the VE. not all bin files use VE as multiplier. On my 96 DOHC the factory file used VE when calculating fueling in PE.
Tinytuner allows you to switch between AlphaN maf failure and VE maf failure modes, it does NOT enable "magic VE all the time mode" that people think it does. I have tested this extensively via an all 0 VE table in mulitple different OSID's.Most 98+ files i have seen VE is not always active or even enabled as a back up for MAF failure. In tiny tuner you can activate it and use its values to be incorporated into fueling. I found this to be very useful when tweaking AF with a wide band installed. also if you do a proper VE tune, you can have a fail safe tune if your MAF sensor dies.
As far as a "proper fail safe" goes... Unless you have a stupid setup like mine making over 800hp, then you are going to be able to get your car home on a stock VE every time, with decent MPG and minimal stalling.
As far as your map sensor deal goes... Congrats I guess. Doesnt seem to make sense to me as the code behind a L36 vs L67 map sensor is WAY WAY different... I tried to enable a 3bar for logging reasons.
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