Gas prices always seem to be lower in the winter than in the summer. All the things that make gas prices rise and fall can be pretty convoluted, and a lot of factors play into seasonal price differences. There’s higher demand in the summer, with people going on vacations, and generally getting out more and doing more driving. The biggest factor that makes gas cost more in the summer is that the gasoline is actually different. (more…)
Remember Chitty Chitty Bang Bang, the kids’ musical about the flying car? Did you know it was based on a real car? The real one couldn’t fly (at least not in the literal sense), but it did have one thing in common with an airplane: the engine.
In the early days of motoring, there really was no replacement for displacement. Engineers hadn’t yet figured out how to make reliable engines that ran over 3000 RPM. The only way to squeeze more horsepower out of an engine was to increase the volume.
Many very large engined cars were designed for racing and to test land speed records in the early 20th century. Arguably the original was the famed Blitzen Benz, whose 21.5 liter engine could output 200 horsepower at 1,500 RPM. Not wanting to be outdone, Fiat constructed the Tipo S67, using a 28.5 liter, four cylinder airship engine. The S67 could output 300 hp at 1,900 RPM. (more…)
Have you ever seen a 1996 Jeep Wrangler? How about a 2001 Cadillac Escalade? If you’re about to say yes, hold on and think again. A number of models through automotive history have skipped model years.
Even though your car may have been manufactured or sold in that year doesn’t mean that’s what year it is. If that sounds confusing, it’s because model years are confusing. Though a car might be, for example, a 2015, doesn’t mean it was actually built in 2015. Car companies want to have the car already at dealerships by the start of the year. So, in most cases, the new model year is released in the last quarter of the previous calendar year. A 2015 might be introduced in October 2014, say.
That’s not a hard and fast rule, though. Automakers can release a new model year as early as January 2 of the previous calendar year. That is to say, a 2015 car can be sold as early as January 2, 2014. Sometimes car companies will make a new generation of a car an early release. In other cases they might extend the sales of one model year into the next calendar year if the new generation is not yet ready. That is how most skipped model years happened. Here’s a quick chronological list (more…)
Winter tires, or snow tires, as some people call them, can be a big benefit in winter driving. They give your wheels a better grip on the road, which means you’ll have better traction, handling and braking.
There are two main differences between winter tires and your standard, all-weather tires. First, winter tires are made of a more pliable form of rubber than all-seasons. Rubber tends to get stiff when it’s cold. A stiff tire won’t flex to conform to the road. That means your tire has less contact with the road when it’s cold. Pliable snow tires do better meeting their surface against the road.
The other major difference is that snow tires have something called sipes. If you look at a snow tire up close, you’ll notice that in addition to the treads there are tiny little inlets (much thinner than the tread grooves). These are the sipes. The sipes (more…)
You’re driving down a back country road at night. Over the howls of the wind, you can hear a rattle and clunking. Is your car haunted or do you just need to fix your suspension? Here are 5 signs that your shocks or struts might be ready to pass on to the great beyond:
1. A Sinking Feeling
Worn springs can lead to decreased ride height. Check your ride height and then compare it to specifications for your model. If you’re riding too low, it’s time to replace your shocks and springs. You might also notice that your car bottoms out on rough roads, speed bumps, or when you’re coming into or out of your driveway.
2. It’s Alive!
You might notice that your ride is livelier that you’d like it to be. (more…)
Many people ask us here at 1A Auto what the difference is between an exhaust manifold and a header. Well, today is your lucky day because we are going to tell you….and then you can go tell all of your friends and look all smart and whatnot. It will be our little secret but hey, that’s what we are here for.
While exhaust manifolds and headers play the same role in engines, namely channeling exhaust away from the cylinder head to the exhaust pipe and eventually out the back of the vehicle, there are important differences between them. Essentially, headers are upgrade parts designed for performance applications, while exhaust manifolds are more utilitarian. There are advantages and disadvantages to each, and which one you choose will be influenced by your needs.
Exhaust manifolds are frequently formed of cast iron in a block-like configuration. This gives them sturdiness and longevity. Because the cast iron material is thick, it holds on to heat well, which is good for emissions and keeps heat from leaking to other nearby parts. The thick walls do, however, mean there is a small space for exhaust gases to pass through, and the iron casting makes the interior rough which can slow the flow of exhaust gases. This creates back pressure which keeps the exhaust from being cleared as efficiently as possible. This reduces the efficiency and ultimately the power of the engine because exhaust must go out to allow fresh fuel and air in.
This is the problem that headers are intended to solve. Headers are aftermarket upgrade exhaust manifolds that use an individual steel tube for each cylinder. These tubes all connect to a collector pipe. The tubes are smooth and equal in length. This ensures that the gases from each cylinder reach the collector separately, avoiding back pressure. This benefit can be lost if other exhaust components are not also upgraded. If the exhaust pipe that follows the headers is too restrictive it can introduce back pressure to the exhaust system and diminish the power advantage of headers. Another disadvantage of headers is that due to their thinner walls, they do not absorb as much sound as cast iron exhaust manifolds, making them louder (although some may see this an advantage). Some vehicles do come with stock tubular steel manifolds. Primarily these are for performance vehicles, such as sports cars. Jeep also notably uses tubular steel exhaust manifolds.
That my friends, is all there is to it when it comes to exhaust manifolds and headers. Hopefully we were able to clear things up for you!