Monday, November 24, 2014

DIY Fix: How to Install a Greddy Boost Cut Controller (BCC) on a 2JZ-GTE with VVT-i (Lexus GS300/Toyota Aristo)

A Greddy Boost Cut Controller (BCC) will allow you raise the boost pressure without hitting the factory boost cut.
Our project Lexus GS300 (Toyota Aristo) has been running great, and we love the flexibility of the VVT-i 2JZ-GTE engine around town.  Boost comes online at 1500 rpm in sequential operation to provide adequate torque, and the 2nd turbo comes on at about 4200 rpm to provide additional power up top when needed.  We switched the car to a parallel setup aka True Twin Conversion (TTC mode), which has a bit more lag with the turbos providing boost starting at about 2800 rpm, but there is no dip in power between 3800-4200 rpm when the 2nd turbo would spool up in sequential mode.  This gives the car a more linear feeling powerband with more midrange punch, albeit at the expense of low end torque. 

We recently installed a bleed valve style manual boost controller to increase the boost from the factory setting of 12 psi.  One thing we noticed with the installation of the boost controller was the immediate increase in low end torque.  Noticeable boost (~5 psi) would come in at about 2200-2400 rpm depending on the gear we were in, which made our GS300 much easier to drive around town at low speeds.  We wanted to set our boost to 16 psi, however we were running into boost cut at 14.7 psi (1 Bar) of boost.  Boost cut is a safety feature where the computer cuts the ignition to the motor if the manifold pressure exceeds a certain threshold (1 Bar in our case with the 2JZ-GTE engine) for more than a second or two. 

To bypass the factory boost cut, we went with Greddy's Boost Cut Controller (BCC).  This device caps the voltage signal coming from the manifold pressure sensor, so the car's computer will not invoke boost cut.  Since Greddy does not make a 2JZ-GTE specific BCC, you will need to source one for a 2nd generation MR2 (SW20 chassis).  Follow along as we show you how to install the BCC on a Lexus GS300/Toyota Aristo 2JZ-GTE VVT-i engine. 

Thursday, November 20, 2014

DIY Fix: Increasing trunk tension on a Lexus GS300 or Toyota Aristo (preventing decapitation!)

The Lexus GS300 (Toyota Aristo for our overseas readers) is a great luxury sport sedan, and it has been our ongoing project car for the past 18 months.  There are a lot of things we love about the car, and a few things we don't like.  One annoyance is the fact that the trunk closes way too easy, and it comes down with enough force to leave a bruise on your back or head, such as when were installing the rear strut tower bar on the car. 

On a recent trip to get groceries, a small incline was enough to keep our trunk from staying open.  Juggling groceries, packing a stroller, getting rained on, and caring for a toddler don't make for a great mix.  We decided enough was enough, and took a look to see if we could do something to keep the trunk from being so easy to close.  Thankfully, there is a remedy to increase the tension on the trunk, and it literally took a few minutes to do.

Thursday, October 16, 2014

AMS Alpha Omega GT-R: King of the Streets, and King of the 1/4 Mile

If you're like us, you love horsepower and speed.  While we normally focus more of our attention on cars that turn quick lap times around a road course, we do like to see the extreme speeds a car is capable of in a straight line.  One such car is the 2000 horsepower Nissan GT-R built by AMS Performance.  The team hails from Chicago, Illinois, and they are also known for their incredibly fast Mitsubishi Evolution X.

Monday, October 13, 2014

Coronado SpeedFestival 2014 : Part 2

In case you missed the first part of our coverage of the 2014 Coronado SpeedFestival, you can view it here: Coronado SpeedFestival 2014 Part 1

Now onto part 2 of our coverage of the event.

A classic GT40 done in the Gulf Oil racing colors.

Sunday, October 12, 2014

Coronado SpeedFestival 2014: Celebrating 50 years of Mustangs; Vintage Car Racing; Car Show Part 1

It's been over 50 years since the original Ford Mustang was debuted in New York.  The iconic muscle car ushered in a war of horsepower as other car manufacturers created their own interpretation of Ford's creation.  The Mustang may have been outgunned in horsepower as the 60s came to a close where the Hemi and other big block motors reigned supreme, and the 70s brought about the oil crisis which ended the muscle car period, but in the end it was the pony car which had the last laugh.  The 2+2 sports car is the only one which has stood the test of time, with it's arch rival the Camaro taking a brief hiatus after 2003. 
The Coronado SpeedFestival is open to everyone. 

This year, the Coronado SpeedFestival paid tribute to the Mustang and its various iterations, and there was a parade lap with nothing but Mustangs during the afternoon lunch break. Aside from the focus on the Ford Mustang, the main stars were the race cars dating from the early 1900s all the way up to late model ex-NASCAR race cars.

Friday, July 18, 2014

DIY Fix: Remove and Replace Cabin Air Filter Lexus GS300 (Toyota Aristo JZS161)

What is a cabin air filter?  We all know that an air filter keeps dirt and grit from entering the engine, but what about the for air entering the inside of the car when you use your fan or a/c?  The cabin air filter is similar to an engine's air filter in that by design it is to keep pollutants and pollen from entering the cabin while driving.  Follow along as we show you how to replace the cabin air filter on our project GS300.