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Nissan 370Z Engine VQ37VHR

Nissan 370Z Engine Tech!  Inside the VQ37VHR

By Mike Kojima

The VQ37VHR engine found in the new Nissan 370Z is a marvel of automotive engineering, powerful, clean and efficient, but from a tuner's perspective it is controversial.  Although the VQ37VHR is a work of engine design art, we predict that it will be exceedingly hard to modify beyond basic bolt-ons.  At a glance the VQ37VHR pulls some impressive numbers pumping out 332 hp @7000 rpm and 270 lb-ft of torque @5200 rpm out of 3.7 liters in the 370Z chassis.

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Redline Time Attack! - Willow Springs 5/31/09

by Eric Hsu

Unlimited class results from the 2009 Redline Time Attack Round 2 @ WIllow Springs time attack and the happnenings in the unlimited class.


How do Wideband Air/Fuel Ratio Sensors Work?

By Mike Kojima & Dave Coleman

The art of tuning an engine is not new, being important since the birth of the internal combustion engine over 100 years ago. For a generation or two, methods such as CO meters, vacuum gauges and the arcane and very subjective black art of reading the spark plugs to determine the engines running condition were the main tools in a tuners arsenal.


Sierra Sierra Enterprises - Time Attack EVO 8

by Eric Hsu

An introductory look at the Sierra Sierra Enterprises Mitsubishi EVO 8 Unlimited Class US Time Attack car. I think this car is the cleanest built unlimited time attack car to date.

Chuck Johnson's Bonneville Adventure Part One

By Annie Sam and Mike Kojima

Many of us can remember the heydays of the salt flats and have dreamed of one day running there.  I can remember as a 4 year old, having my Dad read me stories from the newpaper about Craig Breedlove and Art Arfons duels on the salt. I even had a toy model of Breedlove's Sprit of America jet racer.


How Not to Take Part in a Rally

By Aaron LaBeau and Mike Kojima

For those of you not familiar with Dave's pile, it is a rusting, dented, Krylon painted and smashed 1969 Datsun 510 immortalized on the pages of Sport Compact Car and on Speedchannel's crappy rally coverage.  However ugly it is, the old dog is packed full of state of the art stuff like a DMS long travel rally suspension and a modern SR20DE engine and transmission.


Building the Bulletproof Transmission, Secrets of the Pros

By Mike Kojima

The transmission was much weaker than the Civic transmission and hampered the efforts of the Nissan camp in getting the Sentra SE-R into the record books in competition.  The SE-R did manage to get into the 10’s then even the high 9’s in import drag racing at a high cost in broken transmission parts. Nissan transmissions might last one or two passes, a point that Honda’s didn’t reach until they were deep into the 9’s and even the 8’s.


EVENT COVERAGE:  SpoCom 2009   

by Jeff Naeyaert

We spent the better part of 5 hours Sunday afternoon at SpoCom 2009 hosted at the Long Beach Convention Center. So dedicated to the scene are we that missing the first 3 quarters of the Laker game, to make our first public appearance was no biggie. 


Project 200SX SE-R Low Buck Nissan SR20DE Build


motoIQ Tech Exclusive! Project Low Buck Nissan SR20DE Part One 

By Mike Kojima

The SR20DE engine has been Nissans workhorse performance 4 cylinder for more than the last decade.  Originally introduced in North America in the Infiniti P10 G20 and in Japan in the PS13 in 1990, the SR20 was designed as a performance motor from the beginning.  Later in 1991 the SR was dropped into the venerable B13 Sentra SE-R and NX2000.  The SR20 was carried over to the B14 200SX SE-R in 1995 and the B14 Sentra SE in 1998 as well as the P11 1998-2001 Infiniti G20.  The 2000-2002 B15 Sentra SE was the last application of the SR20DE in North America.


Nissan low hydrogen DLC coating with ester nanoparticle oil has ultra low friction

Nissan 370Z Bad News Buzz:  High Engine & Diff Oil Temps ~ The $300 Dollar Oil Change ~ Engine Clatter & More!  Hype or Reality?

By Mike Kojima

One of the main issues is that the 370Z and G37 with the VQ37VHR engine experiences high oil temperatures. The high engine oil temps can cause the engines ECU to put it into a limp home mode where the engine rpm is limited, first to around 6000 rpm and if you don’t start to behave, a lower limit of about 3500 rpm is engaged until the oil temperatures drop below around 280 degree and the key is cycled. The VQ37VHR is very prone to suffer from high engine oil temps during any sort of extended high speed driving such as motorsports events, in racing and even non competition events such as track days.

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Nissan 370Z VQ37VHR VVEL system

Nissan’s 370Z VQ37VHR Cylinder Head and VVEL Continually Variable Cam Timing Technology(NEW VIDEO) 

By Mike Kojima

The unique VVEL system completely controls the intake valves opening and closing events. The VVEL system is exceedingly complicated using two separate rotating shafts driving links that operate eccentrics activating a valve activating reciprocating rocker arm that takes the place of the traditional cam lobe.

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2011 Nissan 370Z hybrid sports car

motoIQ Feature; Nissan to launch hybrid 370Z sports car in 2011? (updated, new info! 5/28/09) 

By Mike Kojima

The Nissan 370Z hybrid will be powered by a version of the VQ engine displacing 3.7 liters and an electric motor. A hybrid drive system will use two separate clutches, one between the internal combustion engine and the electric motor with another clutch between the electric motor and the drive wheels. This system will optimize performance and efficiency depending on operating conditions. The new hybrid system will also feature a full plug in EV mode for city type conditions where charging stations are available to maximize economy.

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Nissan 370Z Killer Bee dyno test

Nissan 370Z 6-Speed Manual Transmission Parts Dyno Test, We Test Stillen's Exhaust System and High Flow Cats With Technosquare's ECU Reflash

by Mike Kojima

For our test mule, we used the Killer Bee, the yellow 370Z that was our May feature car. The Killer Bee is a sports package 6-speed manual transmission 370 that was returned to stock for our evaluation. We will be evaluating more parts on the Killer Bee in the near future so stay tuned! In stock trim the Killer Bee slung out 262 whp at 7000 rpm and 210 lb/ft of torque at 4600 rpm. The VQ37VHR engine exhibited the typical wide flat torque curve and nice linear power curve that the VQ37VHR is becoming renowned for.

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Berk Technologies 370Z cats and downpipes

Berk Technologies Nissan 370Z Downpipes

By Mike Bonnani

When evaluating the exhaust system on the Nissan 370Z we were amazed how restrictive it was.  The tubing diameter is tiny for an engine with the output of the VHR37.  To help address this issue we decided to start uncorking the exhaust system by evaluating a set of high flow Catalytic Converters and Downpipes from Berk Technology.

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