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The PCV System

1) When the engine is running, a small portion of the gases (which are formed in the combustion chamber ) leak past the piston rings and enter the crankcase. Since these gases are under pressure, they tend to escape from the crankcase and enter the atmosphere. If these gases are allowed to remain in the … Continue reading The PCV System
About ZZP Heads

About ZZP Heads

We have spent many years perfecting the work on our heads. We have flow tested heads from Intense, Thrasher, RAT, and many private shops. When we got close to our final design we had two shops do flow testing on the same ports to verify accuracy. Once the port design was final, we supplied the … Continue reading About ZZP Heads
FREE MOD: Ground Wire Upgrade

FREE MOD: Ground Wire Upgrade

The factory does a poor job of grounding the battery to the chassis. By fixing this you can increase the performance of your electrical system. You can fix this issue by performing the following steps: 1) Remove the ground wire from the battery to the chassis using a 10mm socket. … Continue reading FREE MOD: Ground Wire Upgrade
Why Drill Holes in your Thermostat?

Why Drill Holes in your Thermostat?

Why Drill Holes in your Thermostat? The main reason to drill a hole in your thermostat is to keep your car cooler by controlling the KR. However, these holes only reduce the overall engine temperature by about 5 degrees. Did you know there is a much more important reason for doing this? While at the … Continue reading Why Drill Holes in your Thermostat?
Engine Exhaust Coating Comparison

Engine Exhaust Coating Comparison

Historically speaking, reducing engine bay component temperatures has been critical in achieving success for many types of automotive racing. The cooler that some of these components are during operation of the vehicle, the more efficient the engine becomes. Colder air … Continue reading Engine Exhaust Coating Comparison
How to Achieve Neck Snapping 60′ Launches

How to Achieve Neck Snapping 60′ Launches

There are many products available and becoming available for the grand prix that aid in launching. Some of these are: Limited slip differentials Coil spacers or spring blockers for the rear Traction bars for the front Lowering springs to a small degree Struts to a small degree Some people have even suggested some pretty … Continue reading How to Achieve Neck Snapping 60′ Launches
Intake Designs, Airflow Testing, and Theories

Intake Designs, Airflow Testing, and Theories

Much debate still lingers about the standard CAI box vs. a FWI system. It is well known that maximum performance out of a combustion engine requires cool air. This means designing an intake system that brings in as close to ambient as possible. With these thoughts in mind, many people are drawn to a FWI. … Continue reading Intake Designs, Airflow Testing, and Theories
Series 3 HV install

Series 3 HV install

This is a write-up on how i did my hv3 install on my 2007 base GP. Tools needed: any tools that you might need to remove your air intake. (I only needed a flathead screwdriver. ) Socket set. I used my 1/4 drive socket with a long extension so you can maneuver around the … Continue reading Series 3 HV install
FREE MOD: 1997 Grand Prix Auto Headlight Sensitivity

FREE MOD: 1997 Grand Prix Auto Headlight Sensitivity

’97 had a different light sensor for the auto headlamps with a blue lens covering the photo eye. The hole in the mounting panel was also much smaller in 97, causing an over-sensitive auto headlight condition. By enlarging the hole in the mounting plate for the light sensor on the ’97 model to the now … Continue reading FREE MOD: 1997 Grand Prix Auto Headlight Sensitivity
Mystery Knock Retard (KR)

Mystery Knock Retard (KR)

Mystery KR: A problem that has plagued many GP’s has been the mystery KR. Some GP’s have always been a little slower than they should be. Some GP’s are haunted by KR that just won’t go away, or they get Knock Retard much sooner than they should.