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Throttle Body Spacer
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bszopi
Throttle Body Spacer
Port injection The TB spacer is meant to keep the throttle body cooler, by separating it from the manifold using a phenolic material instead of metal. The misconception is that by adding space behind the TB, you are going to get more torque. The lowered temperature is fine, and is worthwhile (see TB coolant bypass), but the cost of a spacer and the remaining intake manifold temperature doesn't do a whole lot on its own. The performance myth with this device is that it allows more air in... -
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Throttle Body Heat Shield
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Throttle Body Heat Shield
Its 2024 and this needs a bit of an update. We have been using 3D printed materials and had to use a throttle body heat shield to keep the header from melting our part. This was PETG, so definitely not the best for this application, but the shield worked. It was made of steel and bolted to the bottom 2 bolts of the throttle body. Also in a race car, which is a different scenario than the original article was written for. We originally wrote that a metal heat shield is going to become a heat...Last edited by SappySE107; 07-28-2024, 07:22 PM. -
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Throttle Body Coolant Bypass
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Throttle Body Coolant Bypass
This isn't so much a myth, as it is exaggerated. The lines were put in by GM for cold climate conditions, which is said to cause ice to form on TB, which could cause a lot of problems, like a stuck open condition that can cause an accident. There have been no known reports of this happening, but there hasn't been any research either. ... -
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Electric Superchargers
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Electric Superchargers
There are several different versions of this myth floating around.
Here is one view on why electricity and boost don't mix: Click Here!
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Thermostat
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Thermostat
I'm going to keep this short, because its a simple concept. For years people have been spreading the word that a 160 stat will cause problems. This is true, as it hurts gas milage and MAY cause the cylinder walls to wear faster due to less expansion. If your fan turn on times aren't matched, it can allow a cycle of 160 to 220 degrees back and forth, which will contract and expand the cylinders. ... -
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IAT Resistor Mod
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IAT Resistor Mod
IAT stands for Intake Air Temperature. It is a simple thermistor that changes its resistance according to the temperature it is at. The idea beind this modification, is that by changing the resistance to that of a cooler interpreted reading, you will get more fuel. While it is true that you will dump more fuel...its false that this is a good idea. Running rich is bad for performance, so you are just wasting your time with adding more fuel in this fashion. ... -
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Self-Tuning Computer
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Self-Tuning Computer
"The MAF sensor will compensate for your mods". No, it wont. It will accept mods, including boost a lot easier than a MAP sensor setup did, because the computers are programmed with the ability to read boost values and higher airflow through the MAF sensor. However, the computer is programmed with hard set tables for the MAF sensor inputs to be converted to g/sec of air. The problem with thinking that the computer will tune itself is that it really doesn't tune. It just adjusts to keep the engine running. ... -
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TPS-TEC Mod
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TPS-TEC Mod
TPS, or the Throttle Position Sensor is the device that tells the computer how far the throttle plate is open. The major misconception with this device is that the car uses it for fuel delivery. The MAP (Manifold Air Pressure) or MAF (Mass Air Flow) actually have this job, not the TPS. The job of the TPS is for what is called Power Enrichment in the computer. At a programmed TPS %, the car will resort to a different set Air/Fuel ratio for the added demand on the motor. The TPS-TEC is supposed to take the real TPS and tell the computer you are at a higher TPS%. This is all done through varying voltage, so the device itself most likely works. However, the real question is "what does it achieve". Well, it achieves what your foot achieves. You can think that your car is faster because instead of 70% throttle, it only takes 60% throttle to go into this Power Enrichment mode. ... -
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