MotoIQ Project Sentra Spec V

Project Nissan Sentra Spec-V part 5; Lessons in Geometry

By Mike Kojima

Although Nissan hyped up the Sentra Spec-V as a performance sedan in its marketing campaign, in truth the car was a little more than a piece of basic transportation with a few performance enhancing bells and whistles.  The car was cursed with a crude beam axle rear suspension and a McPherson strut front suspension whose geometry was designed around efficient packaging and relentless understeer rather than performance.  Because of this, the Sentra is at a significant disadvantage in the handling department when compared to its FWD rivals, mainly Hondas, the Scion TC and even the Infiniti G20.  Despite of all this, we at MotoIQ are always up to an engineering challenge and we set about to rework the SE-R's suspension to attempt to make it a little more competitive.

To read more about Project Spec-V click here!


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Understanding the EFI process

EFI 102- Understanding EFI Processes Through Detailed EFI Sub-system Analysis

By Christian Krahenbuhl

This is the second of four EFI articles from Cobb Tuning. This article will provide a more precise focus on modern EFI Systems; introducing you to various closed-loop control systems and explain how some of the basic calibration/tuning feedback systems are used. We will again introduce you to the new terminology and rhetoric used by tuners, engineers, & engine calibrators. This article will use more advanced animations and hands on exercises (with a spreadsheet) to educate you as to how calibration of modern EMS is done. We will breakdown the EMS into sub-systems; we will look at separately understanding and calibrating the Fuel System, the Ignition Advance System, the Boost Control System, the Camshaft Phasing System & Other Control Systems.

Read Part 1 here!


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Posted in: Magazine, Tech, Engine

Museum Autovision Rotary nerd heaven

Technobabble - Rotard Heaven

by Dave Coleman

For about a decade, the rotary engine looked ready to take over the world. Dozens of companies were developing the powerplants in an effort to exorcise the rotary's demons and realize the potential of its simple concept and compact proportions. Almost all of them failed, and the whole exercise was relegated to a historical footnote.

Here, in a small museum about an hour south of Frankfurt, is a glimpse into just how big and complex that footnote should be.







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MotoIQ Project V8 RX-7

SNEAK PEEK:  Project V8 RX-7

By Jeff Naeyaert

Normally we don't do Project "previews" here on MotoIQ, but normally Mike hasn't ground down 1 of his only 2 typing fingers in a power sanding accident rendering him unable to write and normally the FedEX guy doesn't bring us as exciting stuff as he did last week!  So here it is, an introduction to Project V8 RX-7! 


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AEM water injection system

Ask Sarah- Does water injection work?

By Sarah Forst

Hey Sarah,

I have a turbocharged 1995 Integra GS-R with a T3/T4.  I usually set the boost around 8-10psi but sometimes I get up to 14psi.  I still have a stock ignition.  Is this boost too high for 91 octane?  One of my friends said I should install a water injection system, but doesn’t that just kill power?  Can you recommend any water injection systems?


Got a Tech Question?  Email Sarah at


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VIDEO: Restore Your Fogged Up Headlights

Video courtesy of Meguiar's

MotoIQ Staff Report

If you don't know who Meguiar's is then you have probably been hiding under a rock for some time.  Meguiar's is the #1 producer of high quality car care products.  We got to meet the good folks at Meguiars at a SEMA event a few months ago and they impressed us with their knowledge and passion for what they do.  In fact Meguiar's invited the MotoIQ crew to their headquarters to teach them some of the secrets of car detailing which you will see in a future article soon.



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Suck Squish Bang Blow part 2- The Four Stroke Cycle

By Mike Kojima

Now that you know what all of the basic parts of an engine are and what they do, it’s time to understand how they work together in a system.  Almost all cars except for the rotary powered RX-8 and nearly all motorcycles use 4 stroke engines or what is called by engineers, the Otto Cycle to turn the chemical energy of gasoline into power.  Manipulation of the 4 stroke cycle is essential for obtaining more power from a motor so it is important to know what the different parts of the cycle are and how they affect your power output. 


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 nissan pathfinder engine

 Project Pathfinder Part 10, How to Build the Nissan VG30E

By Mari Umekubo

We are getting quite excited as Project Pathfinders motor is now up and running. We are out to show that a solid and reliable naturally aspirated Nissan VG30E can be just as strong or stronger in the power department as the VG33R supercharged motor in the  Frontiers with vastly superior fuel economy.  We also want to show that we can get the pulling power of a small V8 out of the VG. Last month we covered some tricks that Dan Paramore of DPR used to make our heads flow.  This month we will dive into the shortblock of our super Pathfinder.

To read about our VG30E headwork click here!


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Frankenmiata making it handle


FrankenMiata - Making it Handle With a Hacksaw

By Dave Coleman

Frankenmiata phoenix alice in wonderland pan

The secrets of the the FrankenMiata's handling have been hidden for too long. Time to reveal everything. How we stiffened the springs without lowering the car; how we used bumpstops for free travel; how we stiffened the sway bars, and knew how much to do it; and where we set the alignment. All without spending a penny.


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AEM LS1 plug and play EMS ECU

AEM's Plug and Play ECU for the Chevy LS1, a Swappers Delight!

By Mike Kojima

Being able to have full control of engine management is a huge advantage when putting together one of the new generation hybrids.  We found a great remarkably simple solution for tuning with AEM's plug and play EMS for the LS1. The LS is fast becoming the new hybrid swap replacing K motors in Nissan S chassis and finding homes in the engine bays of 1st and 2nd generation RX-7's.


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The Dog Car

The Ultimate Guide to Suspension and Handling: Part II - Controlling Body Motion

by Mike Kojima

Previously, we addressed the most important aspect of handling, the tires. The next important suspension trick to increase grip is to reduce body motion such as roll under hard cornering, dive under braking and squat under acceleration.  In later editions of this series we will get into the technical aspects of chassis dynamics but for now we are covering the basics and will gradually get into the harder to understand parts of the subject.


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Sarah Forst Project Garage

Project Garage Part I: Introduction

By Sarah Forst

When I was looking for a house, I knew I needed a bathroom, a kitchen, and a bedroom, but right up there with those priorities was a large garage. Since Monster Garage, freebie style, isn't too probable, thus begins Project Garage, budget style.

Project Garage Part I covers installing additional electrical outlets, insulation, and drywall in an unfinished garage space.


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Mike Kojima Yam

Revenge of the Nerd - Fear and Loathing in Las Vegas or Top Fuel Fun!

By Mike Kojima

A couple of weekends ago I took my 9 year old Daughter Christa to the NHRA Winternationals in Pomona.  Being the jaded 9 year old she is, she loved the Top Fuel cars, liked the funny cars and thought the 6 second Pro-Stock cars were lame because they were "too slow".  In between runs I explained how the inner workings of Top Fuel and Funny cars tick.  She was pretty amazed at some of the facts I told her about the cars and wanted to know how I knew so much about them.  I told her the story of how I was a crew member for a Top Fuel Funny Car last year during SEMA week.  I learned a lot about these amazing cars that day and I'll tell you the story I told her.


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K&N High flow air intake for 2008-2010 Subaru STI

K&N High-Flow Intake System Adds 17.52 Horsepower to the 2008-10 Subaru STI 2.5L

MotoIQ Staff Report

K&N has recently released their High-Flow Intake System for the 2008-10 Subaru WRX STI, (part no. 69-8005TTK) increases horsepower by 17.52 hp at 5260 rpm over the stock intake configuration. To achieve such a performance increase, K&N replaces the original intake assembly; including the air box, air filter and intake tube with an all-new intake design. The new system draws air through a K&N High-Flow Air Filter that increases airflow and never needs to be replaced. Protecting the cone-shaped air filter, and isolating it from engine heat, is a powder coated heat shield that replaces the stock air box.


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PWL Nissan Titan High capacity oil pan

Nissan Titan Large Capacity Oil Pan, Cure for Transmission Overheating?

By Annie Sam

Without forcing you to read about our Nissan Titans transmission woes, basically the trucks major problem is that the transmission temperatures get very high when towing going up long steep grades such as the notorious Baker grade and the Grapevine, especially in the summer time.  We have experienced this transmission overheating even though our Titan has the factory tow package which has two oil coolers, one in the radiator and an oil to air unit in the front of the truck.


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Posted in: Magazine, Tech, Nissan

Amsoil Severe gear SAE 250 Super heavy duty racing gear oil

Amsoil Severe Gear SAE 250, Medicine for Weak Transmissions      

MotoIQ Staff Report

Now Redline is going to have some company in the extreme use category as Amsoil has just launched and new severe duty racing gear oil, Amsoil SEVERE GEAR SAE 250.  Like Redline, the Amsoil product has an amazing gear cushioning weight of 250!  The heavy weight SEVERE GEAR SAE 250 resists sling off and forms a shock absorbing cushion between gear parts as well as using an advanced extreme pressure metallic film forming additive package.  SEVERE GEAR SAE 250 is designated for racing use and is so new, you won't find it on Amsoil's web site yet but you can read about it on MotoIQ!


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Project Honda Ruckus modified high performance big bore racing engine

Project Honda Ruckus Part 7: Building the Engine

By Jeff Naeyaert

In our efforts to build the ultimate Honda GET 50cc engine for our Honda Ruckus, we have learned a few things with our first iteration of our modded engine, lessons to make our second one better we hope.  In our quest to get even more power out of our little Honda we are going to build another engine, this one is going into another Ruckus in our stable. Our goal for engine number 2 is to surpass the 58 mph of our first engine and reach 60 mph with the Honda engine that came with the Ruckus.

To read about our previous engine build click here for part one and here for part two.  To see all of our Honda Ruckus stuff click here.


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The Progress Group Scion TC coilover suspension kit

Project Scion TC Part 4: Suspension and Brakes

By Mike Kojima

With our cage and safety equipment done on our Scion TC race car, it is time to do stuff to increase performance!  The suspension on a road race car is critical for it to be competitive and we need to so some serious stuff on our car.  Since our Scion TC is being built in its first stage for NASA's PTD class, we have some interesting factors that we have to consider.


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