Tech

 

21

Project G20 Race Car: Building a More Bulletproof SR20DE!

by Mike Kojima

The good old stock SR20DE in our Project G20 Racecar has been doing yeoman duty, reliably lasting for the last few years racing in the MotoIQ Pacific Tuner Car Championship and doing many for-fun track days.  The stock SR20DE in our Project G20 Racecar came from a Japanese engine importer and has never been opened up, other than to add big cams back when we used to run the car in N/A trim.  For the past three years the engine has been turbocharged which has greatly increased the strain it's experienced. 


 

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16

Project E90 M3: Part 5 - K&N Filter Cover

Project E90 M3: Part 5 – K&N Filter

by Billy Johnson

We gave our M3 a quick and easy bump in power by swapping out the factory air filter for the industry-leading High Performance K&N air filter.  We have seen some impressive gains from K&N products and feel there’s no reason you shouldn’t have one on every car you own!  But how much power can really be gained over the OEM BMW air filter in this highly stressed and finely tuned 8,250rpm screaming V8?  Read on to find out!


 

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15

A Look Inside Alec Hohnadell's Get Nuts Lab Nissan S14

by Mike Kojima

Do you want to see a future Formula Drift Champion? Look no further than Alec Hohnadell.  At only 20 years old, Alec already has 3 seasons as a pro under his belt and is the youngest driver in Formula Drift. 


 

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10

Tested: Schroth Quick-Fit Harnesses

by Vince Illi

We've heard that a good set of harnesses can make a difference in lap times, but who wants to go through the ordeal of figuring out where to anchor them and cutting up a car's interior to install them, only to lose the use of the back seats?  We test out Schroth's solution with their Quick-Fit Harness system.


 

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09

Ghostwalk the Whip: Fixing Subaru Bump Steer with Whiteline Bushings

by Daniel O'Donnell (With language assistance for Subaru owners in bold)

There aren’t many more usable vehicles than a Subaru Outback (Scooby Vapewagon). Mild off-roading to your next rock climbing trip? Easy-peasy. Need to take your Australian Cattle Dogs to the vegan dog park? Donezo. Hauling your butch friend Karen and all her camping gear to Beaver Island for a weekend under the stars? Legally, only Subarus are allowed to perform that task. Yet with all these wonderful positives, there’s one annoying issue that nearly makes all these points moot, over time Outbacks can develop terrible rear bump steer (totes gnar dorifto).


 

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08

Project MKIV Supra: Part 15 – Preliminary testing of the Precision CEA 6870 Gen2 Turbo

by Pablo Mazlumian

Today we get some preliminary testing of the Precision CEA 6870 Gen2 turbo both on the dyno as well as on the tarmac! If you like dyno charts and speedo videos, check this out.


 

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03

No Rest For the Studious: The Story of the University of Delaware BHR14 (Part 4)

by David Zipf

In Part 3 of our SAE saga, we finally got our beast running and driving, then promptly threw the diff out like bad Taco Bell.  We then jammed to get the chassis welded back together in time for a powdercoating appointment while we took our final exams.  With the chassis at the paint shop, we pretended to be students long enough to actually graduate.  We then hopped into my trusty old CRV and headed down to see what we got.  If you’ve been reading our first three parts, you’ll remember this was an ambitious redesign, with a split chassis, heavily revised suspension, and large weight saving goals.  We also had a greatly expanded budget and needed to have a car that was not only fast, but looked good too, hence the powdercoating.


 

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01

Fixing Fuel Starvation with the Holley Hydromat

by Mike Kojma

Fuel Starvation is almost always an issue when a high performance car is driven on the track, especially on production cars modified for racing.  Factory type fuel pickups are woefully inadequate for a car with modified suspension and sticky tires when driven on the track.  Just about all of us have been victims of a sudden loss of power due to fuel starvation when cornering hard.  A lot of us have had close calls because of this.


 

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31

5 Performance Car Engines That Suck!

by Mike Kojima

We are going to go out on a limb and make a lot of fanboi's angry. They will call BS and burn us in effigy.  However we are still gonna express our opinions which were developed over the years in the school of hard knocks and talk about real issues we have seen when racing and developing many of our industries' favorite and even legendary engines. Now don't get us wrong, these engines can be turned into successful racing platforms when some major engineering and big dollars are applied but a lot of it is beyond the easy to figure out, easy buy and bolt on stage that most street tuners dream about. 


 

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27

PE Engineering's Racing Pedal Box: The Easy To Install Pedal Box

by Mike Kojima

When building a race car, the only way to get true brake proportioning is to install twin master cylinders and a balance bar. If you are not familiar with this sort of setup, we're talking about having a master cylinder for the front brakes with a separate master cylinder for the rear brakes.  The brake pedal activates both master cylinders at once through a threaded rod or balance bar.  As the balance bar is turned, the brake pedal's fulcrum point moves right or left which gives the brake pedal more leverage on the front or rear master cylinder thus adjusting the proportioning. 


 

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26

Project IS-F: Evaluating the Nitto Motivo Tire

by Mike Kojima

Our Project IS-F is still around, it has been quietly and reliably racking up the miles doing daily driving duties in and around Orange County.  Our car is driven at about 70% street driving and 30% highway driving. One thing we have noticed is that the car has a healthy appetite for tires even though the car is used mostly for family transportation duty. For instance, the factory Michelin Pilot Sports were gone after only 11,000 miles. 


 

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24

Nerd’s Eye View: Ducati Panigale 959

by Khiem Dinh

The newest middleweight sport bike from Ducati gained a few more cubic centimeters putting it awfully close to standard liter bike sizing. Of course, the bigger sibling Panigale 1299 has grown up to 1285cc. However, the 959 might just be the better buy with its upsized engine compared to the previous generation 899 and its price of $15k is right smack in the grouping of price on all the liter bikes on the market.


 

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19

The Life of Opy: Part 1 - Introduction

by Khiem Dinh

Joining the 2011 model year lineup from Nissan was this funky little subcompact crossover SUV. It had polarizing looks, but a spunky and fun personality universally liked. Underneath the quirky exterior laid a real performance foundation starting with a turbocharged 1.6L gasoline direct injection engine and handling more befitting of a sport compact. Throw in optional AWD and the Juke presented an interesting performance package.


 

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17

Evaluating HKS Hipermax SP coilovers on the Mazda ND MX-5

by Mike Kojima

The Mazda ND MX-5 is the latest evolution of the Miata chassis.  We have found it to be an excellent handling car, one of the best and most well balanced cars we have driven.  We have, however, found the car to be too soft in completely stock form to really be fun.


 

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14

Wrench Tip: How To Fix a Faulty Key Fob

by David Zipf

If you drive an older car with keyless entry, you will notice over time that the buttons stop working.  The general solution is to simply replace the battery.  But sometimes that doesn’t actually fix anything.  Other times only one button isn't working while the rest are.  If this is the case, the real problem lies deeper and fortunately, it’s an easy fix with some simple tools and about 5 minutes of time.


 

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11

Squirrel Power: Making our Suzuki FA50 Road Worthy

by David Zipf

When we picked up our 1982 Suzuki FA50 last winter, we spent all our time and effort making the old bird run.  And we succeeded!  But before we put some real miles under this old beast, we need to make it safer.  There are no mirrors and seeing as we will be slower than just about everything other than James May in an electric wheelchair, we really need to see what’s behind us when we stop or turn.  The front brakes are worn out, so we only have rear brakes to slow us down (and they are only slightly better).  The tires are rotten.  And we have no exhaust, so this thing is unbearably LOUD!!!  So let’s make our little bike safer, more reliable, and ready for emergency parts running.


 

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10

Product Development Testing with KW Suspension

by Mike Kojima

If you are interested in the way a suspension company does R&D, take a look at how a typical test session for KW Suspension goes.  We tagged along on the final calibration confirmation of KW's latest 3-Way adjustable Club Sport suspension for the BMW M2.


 

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07

Modeling Braking: Braking Harder Means Less Brake Fade

by Khiem Dinh

Almost every novice to track day driving exhibits the same fault; they do not brake hard enough.  I was guilty of this myself and I remember vividly plowing through many corners at my first auto-x killing a few cones along the way.  Whenever I do driving instruction, I almost always have to tell the student to brake later and harder.  It should be obvious that braking harder and later improves lap times.  However, braking harder versus braking lightly and longer can also reduce heat buildup in the brake system reducing fade.  To prove this theory, I made a little mathematical model.


 

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Posted in: Magazine, Tech
06

Lessons in Turbo Technology with Garrett!  Lesson 1 - The Compressor Wheel

by Mike Kojima

Recently we were privileged to be able to take a look behind the walls of Garrett Turbochargers' research and development facilities.  We were able to get an insider view of the intensive engineering inside a Garrett Turbo and viewed first hand what differentiates it from your typical aftermarket fare.  We were very impressed by what we saw and we would like to share it with you by breaking some of what a World Class OEM supplier puts into the performance turbos any consumer can buy into easily digestible lessons that we will be presenting to you periodically. Perhaps the key part of any turbo is the compressor wheel.  Let's look at what Garrett does to bring you one of the best compressor wheels on the market. 


 

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04

Building the Subaru VA WRX clutch and Flywheel with ACT!

by Mike Kojima

All wheel drive cars are traditionally hard on clutches. With tons of traction, launches involve a lot of clutch slippage. Fast shifting and even downshifting are all harder on the clutch due to the increased traction of 4 wheels.  With this in mind building a daily driver heavy duty clutch for a street car is always a challenge. 

It just so happened that our friends at ACT were wrapping up development of a clutch and flywheel combination for the late model VA WRX when we were at their office and we thought it might be a good opportunity to show what is deep inside ACT's WRX clutch which shares many design features with all ACT clutches. 


 

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