LT1 “Free Mods” for Horsepower
De-screening the MAF sensor.
****WARNING!!!?.THE MAF IS EXTREMELY SENSITIVE BE CAREFUL WHEN HANDLING IT! NEVER TOUCH THE WIRES EITHER! *****
Start by removing the MAF from the car and finding a clean area to work. There?s many ways to remove the screen, but probably the safest way is to use a Torx head socket and unbolt the 2 metal halves from the actual sensor. This will prevent you from accidentally damaging the wires. Set the sensor aside where it won?t get damaged.
Some people have had some negative effects from removing the MAF screen, so I would suggest trying not to damage it while removing it. There is a small snap ring that can be removed with a pick or small screwdriver, and the screen will come out, in one piece. I?d do this just in case you need to reinstall it.
If you don’t care about the screen. Grab a screwdriver and go wild.
Throttle body bypass.
Start by removing the intake elbow so you can easily see the underside of the throttle body. Locate the hose that leads from the radiator to the drivers side of the TB. Have plenty of rags ready and loosen the clamp. Some coolant will drain out, it?s not much, but try to keep it from spilling on the Opti. Next, find the hose that leads from the TB to the steam pipe. (it?s the other hose on the bottom of the TB). Remove the hose from the TB and from the steam pipe. Now take the first hose and connect it directly to the steam pipe. Clamp it down and you?re finished. Some people use caps to cover the ports on the TB, but it?s not necessary.
Intake silencer delete
This one requires a bit of creativity, but it?s pretty straight forward. Start by removing the intake elbow. You?re probably going to need to cut the clamp off the silencer, then remove it. Now you just need to find something to plug the whole with. I?ve heard some shampoo bottle caps and deodorant caps work or you can trace the shape on to some wood or aluminum and cut it out. Then simply insert the cap into the hole and use a new hose clamp to clamp it down. When inserting the cap, try to position it so it is flush with the surface on the inside of the elbow.
50 Cent Skip shift eliminator.
Another one that’s not pretty but it will work. Go to Radio Shack and buy a 2200 Ohm ? Watt resistor. Disconnect the wire harness on the CAGS solenoid and insert one end of the resistor into each of the 2 ports on the harness (wire side, not the solenoid side) tape up the harness and resistor so water can?t get to it. Then tape up the solenoid connector for the same reason. Ziptie the wire harness somewhere out of the way so it doesn’t fall out and drag on the ground.
This will disable the Skip shift solenoid, however the light on the dash will still light up when it?s trying to activate.
Gutting the catalytic converter
DISCLAIMER: FOR OFF ROAD USE ONLY
This isn’t technically free, but it?s usually cheap. WARNING?.you will fail visual inspection during emissions testing and most people fail the smog test without a cat. The easiest thing to do is find a muffler shop and ask if they will cut out the CAT and weld in a straight pipe. It is illegal for them to do this, but most places don?t really care. Try to avoid the chain muffler shops, use an independently owned shop. They?re more likely to say yes. It cost me $20 to have my first one done. On my second car, I bought the owner lunch ($4.00 at Taco Bell) and he did it for me.