04-14-2011, 05:36 PM
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#1
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Turbo Member
Join Date: Feb 2011
Location: Virginia/Philippines
Name: PI_greg
Posts: 1,370
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LP pressures
Well folks I finally got the trans LP gauge installed. It is pretty much confirming what I thought, but to a even greater degree. That being we need a lot more LP pressure. First the LP pressure is constantly changing. It is very sensitive to MAP/TPS input. Sitting at a light it reads about 120psi, step into it it may go as high as 165psi. But cruising it is only 45psi. Now it is easy to see a big torque motor will hurt the trans if it doesn't raise quick enough. I pulled the resistor (transgo style) to do initial testing. And will start testing after I get a better feel for what is happening. One thing I am very confident in saying is tuning the MAP signal to change pulse width has a very big influence on the transmission LP.
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PI_greg 2003 SXT-Hemi, SS/T rims, 275/60-17, AeroForce, w/wideband, 6.1 ignition, K&N-77 CAI, Fastman TB, eFan, 180 stat, TMR, HD OEM Trans Cooler, SC3865/PSC1, Dual window switch/ high idle mod, Edge, Crazy Spartan (112 lsa), 2800, DTT 4:10, TCI Floor Shifter, Shift lite, Pacesetter Ceramic LT's, Magna Spun Cats/SI/DO Muffler, Mcgaughys 2/4.5 spindle kit, Monroe shocks, Caltracs, Aeon springs bumps, SRT-10 gage pillar, air horn
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