Diesel Turbo Back Exhaust - Will it Cause Me to Lose Low End Torque and Horsepower?

Diesel Turbo Back Exhaust - Will it Cause Me to Lose Low End Torque and Horsepower?

Myth #1 - If I install a 4" turbo back exhaust I will lose all my low end torque.

This is one of those subjects with questions we get almost daily. It takes several forms:
- I read on the internet forums that you will lose all your low end power if you install a 4" turbo back exhaust.
- My friend installed an exhaust on his truck and now it doesn't have the same power it did on take off.
- A diesel engine needs backpressure and if you open the exhaust up too much it will hurt my engine.
- A diesel engine needs back pressure and if I open up the exhaust I will lose power.

Due to the relative low cost of a turbo back exhaust, and the amount of diesel owners looking for a little more power, this is a very popular subject. First things first, a turbocharged diesel engine does not need so much as pound of back pressure after the turbo to perform perfectly. In fact, the less restriction after the turbo, the better. You have to understand that between the exhaust port on the head and the inlet of the turbocharger there is usually back pressure of at least equal if not more than boost pressure on the engine at all times. Any back pressure the engine needs for proper function is provided before the turbo, period. Pressure on the outlet side of the turbo just leads to higher exhaust gas temps. When we install a

four or five inch turbo back exhaust system, we see several things. First is usually a large drop in exhaust gas temperatures. A 100-300 degree or more drop is not uncommon. Second is an increase in fuel mileage. If the engine doesn't have to work to push the spent exhaust gasses out of the tail pipe (we learned in the first article that an engine is nothing more than an air pump), it can use that horsepower to help turn the flywheel and transfer more power to the ground. And third, we will usually see somewhere between 15-30 rear wheel horsepower increase on the dyno when upgrading from a completely stock exhaust.

So what about the internet forums, your buddy, or even you that noticed less performance of the line after installing a high flow diesel exhaust system? Well, you're not crazy and your buddy isn't a liar. The reason for the low end loss on some trucks is from a loss in exhaust gas temps. A turbocharger is driven by pressure and heat. The hotter the exhaust gas, the more it will expand and drive the turbo. If we install a free flowing exhaust that lowers those temperatures, we will see slightly slower spool up all things being equal. Where there was a restriction in the stock exhaust before that caused the exhaust gas temps to be higher at all times, now the temps drop quickly and they have to warm up before the turbo will spool fast again. Is this a huge deal? No.

Most people who have added some sort of programmer that increases low end fueling will never notice it. Also, this slower spool up is more noticeable on standard transmission trucks than automatics due to being able to operate in lower rpm ranges at will. Also, this "loss in low end torque" is usually only noticeable when the truck is cold or has sat idling for a few minutes. Once the engine reaches normal operating temperatures, you should never notice it at all. What you should notice is increased horsepower, increased fuel mileage, and lower exhaust gas temps.

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Diesel truck exhaust stacks, The Hottest Thing On The Road

The exhaust pipes are the hottest item in the market for diesel performance. Diesel exhaust pipes look great and are functional. In this article I will try to address the functionality of truck exhaust stacks and the different variations of truck exhaust pipes that are available. First I will address the most important companies, the exhaust pipe.

MBRP Inc. is the manufacturer of the MBRP exhaust pipe smoking. The Smoking MBRP exhaust pipes have been developed forBig Rig aggressive look and the classic MBRP sound. MBRP has both turbo back exhaust systems and batteries universal bed kits that go through the bed and connect to the stock exhaust system in connecting flights at a reasonable price. Both the turbo back exhaust system and universal "T" pipe bed kits are made of stainless steel. The turbo back exhaust pipes are mandrel bent and give the maximum exhaust flow to get the fuel economy, increase power and minimize the EGT. The diesel exhaustStack "T" pipe bed kits are more for looks, although it will still be a performance gain. offer MBRP 4, 5 and 6 inches cut exhaust pipes and the options of a straight cut or a miter angle, a curve or off-peak and end of shift stack tug bull. This batch variations available in 36 inches or 48 inches long to come. There is also a checker plate aluminum cover over the pipe "T" in bed, make a nice check and complete ready to touch the hot pipe "T 'a bit to hold.

Exhaust System

Grand RockTruck exhaust systems make chrome exhaust pipes for trucks and large plants. Chrome exhaust pipes are very durable and have a reflective surface, which looks a lot. Grand Rocks Chrome exhaust stacks 3, 4, 5, 6, and 7-inch sizes. Grand Rock also offers their chrome universal Powerflow "T" Pipe kit for those who see only by looking after the big plant and a small performance gain. They also offer a turbo back chrome exhaust system for those who are for all performance andlooks like. Chrome exhaust systems are very durable and much less expensive. Chrome exhaust stacks look great and are a great value.

Most people that buy truck exhaust pipes, which either look or performance gains and maximum exhaust flow. Some, however, exhaust pipes, for functional reasons. Imagine a flat bed tow that day things, everyday. Would not it be nice for the exhaust gases, most importantly, we are constantly working in order not tochoking on exhaust fumes. Finally, the truck exhaust stacks are functional and look good, and most importantly, add performance, efficiency, aid and temperatures, so get your expensive truck takes longer than necessary.

Exhaust stacks are a great way to increase the power and Chrome exhaust stacks will give you the look you want on your truck.

Diesel truck exhaust stacks, The Hottest Thing On The Road

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