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Increasing HP & Torque(bombing)

When modifying a Dodge Ram its not just the parts you put on the truck that determine how its going to work for you.

There are so many lies that are being told to the pcm, and i dont mean people lying to you , what i mean is that when you modify your truck most people accept the fact that their fuel calculator for one is no longer accurate.(that kind of lying is what i mean)

The pcm( power control module) that controls your automatic transmission relies on 3 basic inputs to control the governor solenoid.

1) tps, the tps basically monitors your throttle position when you are going down the road.

Most guys will tell you after they bomb their trucks what used to take them 3/4 throttle now takes them 1/2 throttle to achieve the same vehicle speed output.

The more you bomb your truck the greater the differencs are,

2)) transmission pressure sensor inside the vb,
Whether you add a shift kit, vb, or whatever to your transmission which you will have to do to increase the line pressure to keep the clutches inside the transmission from slipping,

keep in mind - as you increase the pressures in your transmission the pcm will pick up on that and sense something is wrong and put you into limp mode.

Dont worry about that , there is an easy fix for that, by adding a resistor in line you can fool the pcm into thinking you have stock pressures.

Boy that was easy right, $1.00 from Radio Shack and now you have your truck running pretty good, sounds simple enough right?

The only thing now to consider is that every action has a reaction,
see the pcm uses the pressure sensor on the vb as one of the inputs for controlling transmission shift points.

OK , so now we have lied to the tps, and lied to the pressure sensor, the third input the pcm uses is the vehicle speed sensor.

A lot guys tend to put on over sized tires, now your truck is going faster than what your vehicle speed sensor is indicating.

I am not going to proceed to tell you how to bomb your truck only you can decide that.

If you are in a rural area not much stop and go traffic. most of this stuff will not affect you too much, however if you do a lot of city driving light throttle, IF NOT SET UP PROPERLY you will be one unhappy customer and the drivability in the city will suck.

The guys installing your products and yourself are one of the key factors to having a nice working drivable truck.

I realize most of you guys want good performance but i know you also want good drivablility and durability and the guy setting up the truck must understand that.

I cant stress enough how critical the set up is.

If you are light foot driver most of the time it is even more critical than a guy that drives around with a heavy foot.

You 12 valve guys same senario, garbage in = garbage out set up too is a huge factor for you guys.

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Bill Kondolay
DTT Tranny Builder