Detailing and Cleaning
Porting the stock Throttle Body
How to bore out your stock TB for imporved throttle response.
Making the throttle body a circle
When looking at the throttle body you will see that the entrance for the air is not a perfect circle. The outside of the throttle body dips in toward the rear of the car where the obstruction is. To prevent creating a hole you will need to shape the throttle body with the epxoy.
Fill the backside of the throttle body with the epoxy. Allow the epoxy to set.
Slowly using the dremel grind away at the bump to make it a circle. Do not grind the opening larger than the butterfly in the throttle body. You will get through the plastic of the throttle body and into the epoxy that you applied. Be sure to blow or suck out the dust often.
Do not alter the rectangular opening on the opposite side.
Try to get the curve as smooth as possible. Do a final polish with a fine sandpaper. Clean the upper, uncoated, side of the throttle body.
Putting it back on
Bolt the throttle cable holder back on to the throttle body. Bolt the throttle cable back on.
Put on the metal clips and the TPS sensor.
Gently crew the throttle body back on. This is metal going into delicate plastic.
Reconnect the battery. Reconnect the intake pipe. Start the car and listen for any whistling sounds or other unusual sounds. If so you may have a leak.
If you think you have a leak recheck throttle body mounting. Check for holes in the throttle. Check for a solid connection of the intake pipe to the throttle body.
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