Machine tuning matters

If there’s any wonder about the importance of machine service and its impact on the quality of espresso, look no further than the home version of the espresso making game.

Over the past several weeks, my home espresso machine was showing the telltale signs of failing gaskets and seals, which need replacement about once a year with regular use. The water pressure through the group head gradually went from a heavy flow to a trickle and then to a drip. Over time, though almost too subtle to notice, I was pulling my espresso shots differently to adjust to these pressurization changes.

I was taking more and more time to force sufficient water flow in the group head — compensating so I could generate the proper water pressure through the puck of ground coffee that I inserted into the portafilter. Because of this, hot water came into contact with the surface coffee for longer periods of time, changing the extraction of my shots to something much more than desired, and resulting in an uneven shot that contained more water-soluble, bitter elements in the cup.

The answer, of course, was to open up my machine and replace a number of seals and gaskets. This was my project yesterday. While a few gaskets were still in good shape (my machine contains nine different gaskets, six of which are in the group head assembly), the main pair of gaskets around the group head piston showed serious wear.

These seals were worn down from regular use and no longer held the tight pressure seal needed to properly control the water flow. In the photographs below, you can see the difference between the old, smoothed-down pair of rubber gaskets on the piston and what a new pair looks like in their place. The new gaskets “poke out” from the circumference of the piston, gripping the cylindrical piston wall with a much tighter seal.

Breaking out the wrenches, universal retaining ring pliers, and food-safe lubricant, it’s enough to make you feel like you’re rebuilding a car engine. But the bottom line is that my home machine makes a far better espresso once it has been serviced like this. Even so, such a fix still requires me to greatly adjust my espresso shot pulls to account for the improved pressure control.

So whether your favorite café uses a super-automatic, semi-automatic, or manual lever espresso machine, regular, professional machine service can make a huge difference in the quality of the espresso they produce. And if your home machine is making espresso that’s a lot worse off than it was a year ago, it’s probably time for a tune-up.

Mazda RX-8 Speed Machine 2007 Falken

Speed Machine Performance is a retailer and tuning house run by Dave Gibson and his team of knowledgeable techs, who boast a combined 30 years of experience working with rotary engines, most recently gaining notoriety in the Mazda drift community. The shop has had its hands on some fairly high-profile slide machines, like the FD generation RX-7s of the C-West/DRFT and Falken Tire teams, and in fact Falken Motorsports has retained Speed Machine’s services as mechanics and car makers. That’s why when it was time for Falken to look toward its drifting future, it went right to its valued constructor.

The platform this time, was Mazda’s current sports coupe, the RX-8, a vehicle that in stock trim is motivated by a naturally-aspirated Renesis rotary mill. While the RX-8’s Wankel is an evolutionary cousin of the previous 13B motor, it was designed to reduce exhaust emission and improve fuel spending; it poses unique tuning challenges when compared to the tuner-favorite, twin-turbocharged Mazda 13B-REW rotary powerplant from the RX-7. The 13-REW is a classic power plant that seamlessly used one pump for low-end power before switching to the second turbo for the top end of the rev range.

The Speed Machine team also realized quite early that the naturally aspirated setup wouldn’t go in the highly turbocharged world of professional drifting. The sport isn’t necessarily about speed, but it is about being able to get sideways at will, and an extreme amount of torque is critical to doing that.

To mitigate the issue in the quickest manner, SMP decided on a engine swap; calling on Mazda’s sequential twin-turbo 13B-RE Cosmo rotaries for drift duty – SMP freshened it up with super lightweight 9:1-compression rotors and NRS ceramic seals before dropping it into the RX-8 engine bay. The engine studs were cryogenically treated for a further measure of bulletproofing, and then Speed Machine came up with its own custom urethane engine mounts to swap the mill into an RX-8’s FE3S chassis.

SMP continued to look for power by completely overhauling the forced induction setup on the 13B, fashioning custom manifolds for the duo of Garrett GT28RS turbochargers. Twin Turbosmart 48mm Pro-gate wastegates allow exhaust to bypass the pumps’ turbine blades, and spent gases are sent to the atmosphere via a dual 3” aluminum exhaust. Meanwhile the compressor sections compel induction to a Blitz Nissan Skyline GT-R intercooler that’s been outfitted with SMP end tanks, a heat exchanger that is V mounted opposite a custom Speed Machine double-pass, dual-core radiator and FAL fan. Charge plumbing, rigged with Adel Wiggins clamps and a pair of Turbosmart race port blow-off valves, ultimately delivers boost to an SMP custom intake manifold with two 72mm BDL throttle bodies.

The increased induction required equal consideration for fuel, and to that end SMP went all out to create a system that delivers on demand in a rough competition environment. It opted for big 1,000cc RC Engineering injectors fed by dual Aeromotive A1000 pumps and adjusted with Aeromotive A1000 injected bypass regulators, one per each rail. Fuel for the RX-8 originates in a 12-gallon Fuel Safe cell and is deposited into a surge tank thanks to an Aeromotive Tsunami feed pump. With the induction and fuel elements in place, Speed Machine keeps the power on edge without blowing things up through the use of electronics, namely a Haltech E11v2 engine management and Turbosmart e-Boost2 boost controller.

SMP continued to look for a competition advantage by sorting out the gearbox that comes with the 13B, plugging in an OS Giken close-ratio gear set and 2-way differential in the FD gen. transmission. Additionally, the shop customized a Japanese-spec FD3S RX-7 chassis steering rack with its own tie rods, and redid the rear suspension members with its custom 5-link setup. Also aiding in handling and hooking up are a quartet of Tein Mono Flex coilovers with EDFC and an equivalent number of SSR MS1 rims shod in Falken RT-615 rubber.

SMP’s formula for making this Mazda fly comes complete with aerodynamic bits, too, in particular a Mazdaspeed aero kit and APR Performance GTC wing. To shave speed, or get the car squirrelly, brake mods came in the form of Project Mu 4-piston, 4-pad front calipers, with rears on the way from Japan. Speed Machine also gave the RX-8 Teflon-lined brake lines and a Wilwood dual-master pedal assembly.

Inside the cabin of the coupe, the spare, all-business interior is marked by a roll cage, Sparco Evo bucket seat, and a Safecraft halon 1301 fire suppression system. The RX-8’s pilot steers via Sparco wheel, attached to a Works Bell quick release, and keeps appraised of the Mazda’s performance through an AiM Sports MXL data acquisition system and digital dash.

Speaking of drivers, Japanese racing ace Seigo Yamamoto has been charged with challenging the North American pro drift landscape with the pumped up RX-8. He is one of Falken’s go-to pilots, and stands to gain the most from Speed Machine’s stellar track record for tough-as-nails competition Mazdas. With the season in full swing and a brand new ride at his disposal, he’s in good shape to end ’07 with a strong finish. Competitors should take heed; the biggest threat is probably coming from the last place they expect it.

A Sexy MachineCar Tuning

Car tuning has been referred by many not only as a way to modify a vehicle but it has also been called an art and a way of expression. Tuning vehicle can be done as a hobby as well as it can also be a job for many people who love these performance based machines. A vehicle can be modified in order to better suit its owner as well as to improve its performance and handling.

What a vehicle has just come out of a factory all of its accessories and characteristics are very generic and standard and the rest of the models which are being built in other words, nothing has been customized in order to fit a person's taste, by tuning a vehicle a person not only can choose the color and body work which can be applied to it, the other can also choose to improve the engine, the tires, the rims, the interior design and in many cases a vehicle owner may choose to install additional features and electronic accessories which increase the value and the level of attention the card can get.

Electronics and accessories:

This is one of the most common tuning procedures which is done to a vehicle by those who love electronics as well as cars, we live in an age where music has gone far beyond from the traditional home radio, today we are able to receive news, listen to music which is broadcasted from a satellite directly into our car stereo; others also prefer to carry a custom playlist by adding an additional MP3 player to their cars.

Additional accessories may include high-end speakers, lighting system, a DVD player as well as several widescreen monitors, this are all parts that can be customized by the comes to the interior of a vehicle it also falls within car tuning.

Performance based tuning:

Today's gas prices are climbing to record prices which is what most people are getting concerned about it and are also purchasing smaller cars which will allow them to increase their mileage and spent less at the pump, though some have large vehicles will undoubtably want to tune their cars so that it doesn't burn too much gas. The age can also read to them in order to adjust the RPM.

Additional exterior improvements also include: double exhausts, air vents, spoilers, customized bumpers, custom-made stickers and decals. These group of improvements and customizations are ultimately referred to as car tuning which may be applied to a vehicle order to turn it into a lean sexy machine.

provides more information about auto tuning and it also shows a great gallery of car pictures as well as car babes, visit us today for more great tips.