Category Technical Talk

Last month we have reported the existence of the Jeep Grand Cherokee SRT Hellcat with the supercharged 6.2L HEMI V8.

Recently, some other automobile medias claim that, they have heard from their “source” that the upcoming Grand Cherokee SRT Hellcat is able to reach a top speed of 200mph and run the 0-60 mph within 3 seconds (for example, this report).

While we cannot confirm whether the Grand Cherokee SRT Hellcat can reach 60mph in less than 3 seconds, we can definitely see in order to reach the speed of 200mph, how many horsepower the HEMI V8 engine need to make.

Using the same calculation procedure in our previous article (which calculates the output requirement for th...

Note: We have a more comprehensive analysis of the BMW B58 engine, click and view it:

Detailed Analysis: The BMW B58 Inline 6-Cylinder Engine

The upcoming 2016 BMW 340i will be equipped with a 3.0L turbocharged I6 engine (code name: B58). This is not the same N55 engine which is widely used in many BMW cars at this moment (like 235i/335i/435i/535i/740i etc.), instead the B58 engine is an completely-new design and has many fundamental differences than the N55.

Below are some analysis based on the engine structure images released by BMW.

1. The biggest change in the B58 engine is its block is a closed deck design (while the N54/N55 is an open deck)...

There are many things can be said for the 5.2L V8 engine installed in the 2016 Ford Shelby GT350 Mustang, which outputs a glory 526 hp. While you may see comments saying how good this engine is in many articles in other media, we are going to show you some insights of this V8 which you might not be able to see, and Ford also will not tell you.

First let’s take a look at the exhaust manifold.

From the above photo you can see, for each cylinder bank, the 1st and 3rd cylinder’s exhaust path are combined into one branch, and the 2nd and 4th cylinder use an independent exhaust path (branch), and finally the 3 branches are integrated into 1 single outlet...

We have attended the 2016 BMW 7-Series preview event yesterday night at Beverly Hills, California. During the event we have the opportunity to experience two pre-production 750i xDrive sedans: one with the executive lounge 4-seat configuration, another is the MSport version.

Above image: an artist rendering of the 2016 7 Series, compared to what I have seen in the event this rendering is 95% identical to the actual vehicle

We are not allowed to bring any cameras or cellphones into the event location, but for how the new G11/G12 7 Series looks there are already plenty of photos and renderings leaked on the internet, the above is one of them...

Along with the face-lifted 2016 3 series, BMW has also released one image of the new-designed B58 6 cylinder turbocharged engine, which is used on the upcoming 340i (replacing the 335i).

From the below image depicting the left-hand-side of the engine, we get the below two conclusions about the B58 engine:

1. It is using a single turbocharger, a similar design as the current N55 engine; the turbocharger will be a twin-scroll type;
2. The exhaust manifold is not integrated into the cylinder head; instead it is bolted onto the engine.

Please do not be disappointed about BMW’s decision of keeping the single turbocharger design in the new B58 engine, for such output level (a...