04-12-2014, 04:04 PM
Join Date: Jan 2011
Originally Posted by Hemidup
Everyone knows we really have no way to increase transmission line pressures except with resistors. The Transgo 2.2 ohm as well as the Sonax Boost controller add about 10-15 psi of line pressure. A 1.5 ohm resistor adds up to 30 psi and seldom throws a low line pressure CEL. Denny tried a .5 ohm resistor and said it made close to 300 psi of line pressure with a constant CEL. By adding a resistor, it basically fakes the TCM into thinking that the clutches are wearing and that by adding more line pressure is its way to make the trans last longer. Kinda like the Power Wire resistor which makes your PCM think that the ambient air is 20* cooler than it really is.
So this got me to thinking.....How about adding a variable resistance controller such as a F1 Hurricane resistor mod or such to the line pressure sensor wire installed just like the Transgo resistor? By adding or subtracting the amount of resistance will effect the way the TCM see's and allows a certain amount of line pressure. You could set it at 2.2 ohm's for daily driving and such, than maybe set it to 1.5 ohm's for a lil towing or spirited street drivng, than maybe 1 ohm for full a out boogie mode. Whadda think?
How about you Redtruck-VA? Your the perfect canidate since you already have a line pressure tester and gauge.
Sure I got no problem installing and testing what you have. Have you read my write-up about the Sonnax/Transgo hybrid? I'll see if I can find the link. I'll have to go back and reread some things, but I believe maximum pressure attainable is 240psi due to the mechanical relief valve.
Note: I found this from a old post.
Note: Sonnax and Transgo
both excellent line boosters achieve the end result two different ways. Sonnax simply adds resistance in series to the LP sensor value and Transgo
add's the value in parallel to the LP sensor. Transgo
I look at as being a little more sophisticated as the Line Pressure actually reduces it's offset as the overall pressure increases, where as Sonnax there is a fixed offset at all pressures. A hybrid of the two would really be cool and I have played with it a little without successfully getting exactly what I wanted. The mechanical relief is set for something like 245 psi and I would like to see a consistant 140-180psi. Using a Sonnax I currently get 170psi on acceleration. Criuse it is much lower than I like at 40 psi, but jumps up with any throttle movement. Keep in mind your MAP voltage is a major input for controlling LP. So any tuning using MAP voltage I would highly recommend you monitor your LP to stay safe. Good luck...
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