From that my guess is that the D - A converter used to read that input is an 8 Bit converter but the scaling is such that when you see 255 or 0 that equals 22.5lbs of boost. If that table is rescaled you can make those values read whatever you want, Although I don't see a table in HP tuners to allow a person to do that unless I'm missing it.

An 8 bit D - A is generally a chip that is soldered to a board, to get the resolution any better one would have to change the chip. If GM is changing the highest value that PCM to something higher. Are they intending to change the PCM and the sensor, or, just changing the sensor and rescaling the output value?

Interesting

D.

 

Leaks indicate it's a register shift. Maybe somethng like these get support...

http://delphi.com/shared/pdf/ppd/sensors/et_mapmat.pdf

 

We'll take the .1 to 3.5 Bar please.

I can believe a shift or a shift with math but they would still have to rescale the table/s and again they have access to tables we aren't seeing with HP Tuner, yet.

Load could be calculated from the map sensor, 100% load could be 0 PSI or 14.7 absolute and 200% could be the highest value the PCM can read from the A -D but it would still need to go into some sort of table I would think.

Don't know enough about this PCM, Yet.

D.

 

Agreed on the scaling. 3.5 bar... wheeeee. I'm not planning 50psi, but 30 sounds good

Re the scaling, it's pretty clear they will have had to do something big, and again, leaks from inside are saying this is an OS rewrite.

 

That doesn't sound good. Wouldn't that make HPT useless until they can catch up?

 

Yes.

 

Not for me. Only for those that choose to buy the Chevy tune. Which while having some interesting possibilities will initially have less HP and torque then the current OS tuned via the HPT system.

Hopefully HPT will be able to open the new OS as well and allow things to proceed even farther.

 

rommer I agree. I am currently running an ADM Stage 2 tune. If the numbers being thrown around are correct I would be going backwards. Like you, I believe I'm going to wait until HPT is able to open the new OS before I consider moving in that direction.

D.

 

My biggest issue at this point is getting the power to the ground.

Between smoking the tires in 1st and 2nd and occasional clutch slipping the last thing I need right now is more boost!

 

I don't have the clutch slipping issue, yet.... But I do have a traction issue. As I see it, if we fix the traction issue, the clutch will be the next problem. After that maybe the trans. Tires are a given at this point.

XXL, have you installed your snow injection system yet?