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5250 High Performance Blog

cleaning Direct Injection Dirty Valves

[fa icon="calendar'] Jan 16, 2018 7:00:00 AM / by Mike Wiener posted in Direct Injection cleaning

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Direct Injection intake cleaning with Walnut shellsMost new engines in cars today are what is called Direct Injection motors.

The fuel is directly injected into the combustion chamber.

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Performance Dyno Shop Denver Colorado | Welcome to 2018

[fa icon="calendar'] Jan 1, 2018 12:52:21 PM / by Doug Sherwood posted in Dyno Shop

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Dyno Shop Colorado | As we turned the page leaving 2017 behind us, we must look to 2018 for what matters. More Horsepower


The weather is cold outside and yet the horsepower goals we all crave is still burning inside those want it bad enough. Our Dyno is always ready for being tested.

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High Performance Engine Builds | Lighten the Flywheel?

[fa icon="calendar'] Dec 29, 2017 7:00:00 AM / by Mike Wiener posted in High Performance Shop, Subaru Clutch Upgrades

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Rotating Mass Reduction | Think before you lighten

When it comes to going fast, lighter is better. Lighter accelerates faster, turns harder, and stops sooner. Race cars do everything they can to lose weight and this is mirrored in many sports cars. As the famous saying goes, "Add lightness."

But there does come a point where things can get too light.

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Think first, build more Turbo Power next | Subaru Turbo Upgrades

[fa icon="calendar'] Dec 20, 2017 9:56:15 AM / by Mike Wiener posted in Subaru Horsepower, Turbo Upgrades

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At 5250, Our focus is on performance builds that deliver power gains without sacrificing drivability.

This means that we do not recommend stock location aftermarket turbos. We have good reason for this.

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Rotary Engine Rebuilds | Making more horsepower

[fa icon="calendar'] Dec 17, 2017 11:08:46 AM / by Doug Sherwood posted in Mazda Rotary Rebuilds

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The Rotary Engine is unique, however the goal of making more horsepower is the same when it comes to building reliable power.

Every performance car owner wants more power, better handling and they want it to last longer. OH and a few want it to be cheap....

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5250 Performance | Why we do what we do

[fa icon="calendar'] Dec 13, 2017 7:30:00 AM / by Mike Wiener posted in Dyno Performance Shop, SCCA racing

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At 5250, we work on SCCA race cars, and street performance cars that think they are race cars.

Even though the majority of our customers drive street performance vehicles, we have a deep passion for real race cars. While we always put forth our best effort for reliable performance, racing adds a level of detail, urgency and results that street cars will never attain. You cannot lie about a results sheet, data tells the story.

While missing the next cars and coffee will cause great disappointment to an enthusiast, there is no real loss.

Real racing at real tracks with serious competition is putting your words away and competing with your peers. This is the real deal, for some it is just talking about it, for a few.…it is life.

Preparation is critical | Missing a single race in a series can be the difference between first and second place as points are cumulative through a season.This is one of the many aspects of racing many do not understand

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Misfires | spark plug gap for Gasoline or E85 & Subarus

[fa icon="calendar'] Nov 29, 2017 7:30:00 AM / by Mike Wiener posted in Subaru Engine Failures, misfires

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Misfires & Sparks plugs.

Every gasoline engine has them and just like there are hundreds of different cars on the road, there are hundreds of different types of spark plugs.

Every engine requires it's own specific shape and size plug, but there are many different styles to choose from for each engine. Choosing the wrong plug can actually cause catastrophic engine failure.

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3 reasons - High Performance Modifications | If you are going to, you should…..

[fa icon="calendar'] Nov 27, 2017 7:00:00 AM / by Mike Wiener posted in High Performance Shop

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Dyno Baseline your car | It really is that simple. It doesn't matter if you plan on having a custom tune done or not, you should baseline the car before and after any modifications are done.

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Engine Building Tolerances | Rebuilding a rebuilt engine

[fa icon="calendar'] Nov 16, 2017 8:00:00 AM / by Mike Wiener posted in Rebuilding Engines

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We build high performance engines of all varieties.

The truth of lasting performance is in the details, how well parts fit and the tolerances we build into them.

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So, you want to go faster | SCCA racing facts

[fa icon="calendar'] Nov 10, 2017 9:00:00 AM / by Doug Sherwood posted in SCCA racing

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With our in-house SCCA Mazda race cars, results speak louder than words. This year was a good, bad and learning year for racing.

When you start racing with a sanctioned group like SCCA, the fact is that you will be ’schooled’ by your competitors who have more experience and probably money than you do. That doesn’t mean that you accept defeat and quit. It also means that what works on the street isn’t always the best for the racing.

What do I love about SCCA racing? The fact that you get to compete with other drivers on a level playing field. At the end of the day, you are given a trophy or a results sheet that shows how well you did with your competitors. The competition is fierce, the racing is safe and when you win the feeling is amazing.

You cannot do that on the street. Pulling 1.6 G’s is a good feeling, out-braking a competitor is amazing. Putting together a solid fast lap is always the goal. Getting beat can also be very humbling.

Engines are made at this level to run at high RPM’s and pull hard for many laps. I’ve heard many people talk about track days, this is not the same.

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