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**scheides** · 12-14-2009

Random update. All evo8's that want to run tephra v7 (i.e. pretty much anyone that wants to run one of these out-of-the-box speed density roms) run the 9653xxx6 base rom, which does not come with the EGR and fuel evap code from the factory, so as a side effect you do NOT need to run mrfred's manifold air temp (MAT) logging hack at all, just wire in the sensor into the appropriate pin and go! The stock IAT table is re-scaled for the standard GM IAT sensor, and you simply log MAT on MUT11, done.

Car has been running a little iffy while cold, since it got a bit colder over the last week. This has been a good test of this speed density patch IMHO, because it really needs to adjust for climate changes to be effective. I've been crossing my t's an dotting my i's and making sure I'm not doing something to cause this myself. I will be doing a bit more logging, and possibly messing with the two warmup tables. I really don't want to though, I never had to before! As some of the other issues, this is a minor problem, and not enough to kill this whole project for me.

I can still fire the car up, either let it idle (rock solid @1400, slowly falls to 1000 as it warms up) w/o touching the gas pedal, or simply drive away and deal with a bit of tip-in stuttering that.....now that I think about it, is really no worse than the warm-up timing pull that all stock evos have.

I am ordering an Omni 4-bar MAP sensor today from JohnBradley on evoM, as my car sees 30-31psi regularly and my EvoX MAP sensor is rated at 3.25 or 3.3bar (depending on who you ask) but ultimately is only good up to ~33psi. Anyways, just looking for a bit of extra headroom. If anyone would like to buy my EvoX map sensor, shoot me a PM.

12-14-2009	#49
scheides flips McGee Cribbage Square Champion! Great Mahjong: Classic Champion! Mah Jongg Solitaire Champion! Mahjong Connect Champion! MuMu Champion! Join Date: May 2004 Location: Minneapolis, MN Drives: BeaterX Posts: 12,900	Re: Speed Density on Evo ECU Random update. All evo8's that want to run tephra v7 (i.e. pretty much anyone that wants to run one of these out-of-the-box speed density roms) run the 9653xxx6 base rom, which does not come with the EGR and fuel evap code from the factory, so as a side effect you do NOT need to run mrfred's manifold air temp (MAT) logging hack at all, just wire in the sensor into the appropriate pin and go! The stock IAT table is re-scaled for the standard GM IAT sensor, and you simply log MAT on MUT11, done. Car has been running a little iffy while cold, since it got a bit colder over the last week. This has been a good test of this speed density patch IMHO, because it really needs to adjust for climate changes to be effective. I've been crossing my t's an dotting my i's and making sure I'm not doing something to cause this myself. I will be doing a bit more logging, and possibly messing with the two warmup tables. I really don't want to though, I never had to before! As some of the other issues, this is a minor problem, and not enough to kill this whole project for me. I can still fire the car up, either let it idle (rock solid @1400, slowly falls to 1000 as it warms up) w/o touching the gas pedal, or simply drive away and deal with a bit of tip-in stuttering that.....now that I think about it, is really no worse than the warm-up timing pull that all stock evos have. I am ordering an Omni 4-bar MAP sensor today from JohnBradley on evoM, as my car sees 30-31psi regularly and my EvoX MAP sensor is rated at 3.25 or 3.3bar (depending on who you ask) but ultimately is only good up to ~33psi. Anyways, just looking for a bit of extra headroom. If anyone would like to buy my EvoX map sensor, shoot me a PM.