Turbo manifold/Turbo Header
The blow off valve. This is the device that gives you the nice “PsssssssHHH!” sound when you let go of the gas while under boost. Not just that, it lets your turbo live longer. Why is that? Imagine you had a peice of straw. And pretend that you are a turbocharger. Blow through the pipe. Easy right? Now imagine you cover the end of it. It is very hard to blow right? By covering the end of the peice of straw, that is EXACTLY like closing the throttle plate on the throttle body. Because when you let go of the gas, the throttle plate closes.
Now, imagine you had a mini blow off valve on the straw. So that everytime you put your finger/cover the end of the straw, the blow off valve opens. So the air goes through there. Now it’s easier for you to blow! And since its easier, that must mean its easier on the turbocharger! Which means longer lasting turbo!
11. FMU. FMU stands for Fuel Management Unit. You will definetly need this because it adds more fuel into your cylinders when you boost. If you force more air into the cylinders via a turbochargers, you must add more fuel! And how do we add more fuel? There are a couple of methods. We can make the injectors shoot in more or we can increase the fuel pressure. For now, lets ignore the first method. And focus on the second method because that’s what we will be using!
All B series motors are fuel injected and use a fuel rail. The fuel rail is always under pressure so that when the injectors open, the fuel shoots into the cylinders! What we can do is, increase the pressure so that it shoots more fuel into the cylinders. To make it easier to understand, imagine you had a water hose with nothing attached to the end of it. Now, imagine you squeeze the end of it, more water shoots out! Thats because you increased the pressure.
The FMU does the same thing! It “squeezes” the fuel lines to increase fuel pressure.
Without an FMU, your motor will blow up for sure! All FMUs have ratings, such as 12:1 or 8:1. What that means is, if its a 12:1, it will raise fuel pressure 12 PSI per 1 PSI of boost. So if you boost 7 PSI, then it will raise the fuel pressure to 7 X 12 = 84 PSI. When the fuel pressure is raised, more fuel is added into the cylinders. Easy concept.
Processing your request, Please wait....
