MotoIQ Tech

Turbo Tech: Compressor and Turbine Map Details

By Khiem Dinh

We have previously covered compressor wheel technology and also how compressor and turbine maps are generated.  Now we are going to dive a little deeper into the details of the compressor map and all-mysterious turbine map.  Furthermore, we are going to see how compressor wheel and turbine housing A/R changes affect turbine flow and efficiency.


 

Building the Long Rod Nissan SR20VE Engine

Building the Long Rod Nissan SR20VE Engine

By Mike Kojima and Chuck Johnson

We last left off our SR20VE engine repair job with Port flow Design fixing our head. Read about that here! Since our broken valve chopped up one of our pistons, we decided to go through the engine's bottom end at this time. Since we have been editorially discussing the effects of running a longer connecting rod at MotoIQ lately, what a better place to try a longer connecting rod than our race motor! Check out Khiem Dinh’s excellent article on the subject here!


Tuners: Test Your Injectors!

Tuners: Test Your Injectors!

By Jim Wolf

Oh my God, what a mess this has become! As race engine development moves forward, aftermarket fuel injectors seem to be moving sideways. About ten years back a trend started to modify stock injectors for higher flow rates. This was done by either drilling out the spray orifices or removing the spray plate all together! While some of the companies attempting this seemed to be making a serious effort, actual flow testing in many cases would indicate otherwise. No doubt someone will eventually figure out how to do this accurately, but in the mean time, they at least need to be willing to do actual flow testing, static and dynamic on each injector (no duplicated flow sheets please). Add this twist to the already diverse methods used to state injector flow values and you have a bit of a mess to sort out.


 

Project V8 RX-7: Part 3- Inside the GM LS3 Cylinder Head

Project V8 RX-7: Part 3- Inside the GM LS3 Cylinder Head

By Mike Kojima

In the last edition of Project V8 RX-7 we looked into the bottom end of our EROD LS3 engine to find that the modern Chevy V8 is a far cry from the old small block Chevy of years past.  Lately on some forums that cater to import performance, there has been a huge backlash against the LS swap, particularly into Nissan S chassis and RX-7’s.  All sorts of bleating noise from uninformed sheep decry putting “NASCAR” engines and the like into the S chassis. Purists claim that putting in a domestic engine somehow is making their favorite cars all the same and causes them to lose their soul and other things not defined by logic.  Such is the garbage cluttering the net these days.  Like many FFF facts on the interwebz, their are many fundamental inaccuracies to these statements.


 

The Three Day Wonder, Building a Nissan VQ35DE in Just 3 Days!

The Three Day Wonder, Building a Nissan VQ35DE in Just 3 Days!

By Costa Gialamas

If you have been following our adventures with Dai Yoshihara in the Middle East, then you have probably read the story of how we converted his mildly built time attack car into a Formula D drift car in just a few days, sending it to Abu Dhabi to compete in a Formula D expansion event.  You can read about our adventures from building the car to where we last left off here.


 

electrical basics

Electrical Basics and Automotive Grounding Systems

By Vince Illi (AKA Dusty_Duster)

I’m weird.  You see, most car guys don’t like electrical work.  In fact, most loathe it.  (A friend of mine once told me he’d rather replace a head gasket than crimp four wires together.)  But me, I like electrical work.  I would rather rewire an entire dashboard than remove an intake manifold.


 

Chevy LS3 E-ROD crate engine

Project V8 RX-7: Part 2 - Inside the GM LS-3 E-ROD Crate Engine

By Mike Kojima
 
Hybridnoun- the offspring of two animals or plants of different breeds, varieties, species, or genera, esp. as produced through human manipulation for specific genetic characteristics.
 
In what was nearly a generation ago, a fire was started in the Sport Compact performance market. Some guys on the west coast started dropping DOHC B series engines from the Acura Integra and H series engines from the Prelude in to the smaller Civic, dumping out the SOHC D series econo motor. The creation was called a Hybrid and in the smaller lighter Civic the bigger engines produced amazing for the time performance and launched a huge industry that for awhile dominated the modification scene creating a lifestyle of its own. Import Performance. This generation was rooted firmly against anything domestic. Domestic offerings were considered unrefined, unreliable, unsophisticated and redneck.

 

VG30DETT-Build/valvefacechambers

Engine Tech, Building the Nissan VG30DETT part 2

By Mike Kojima

In the last installment of our build, we delved into building the bottom end of our VG30DETT engine for the goal of reliably achieving 550 plus horsepower.  In this segment we will look into what was done to our top end including the cylinder heads to support this power level.

See part one about the bottom end here!


 

 

Modifed Turbo Nissan QR25DE

Extreme Engine Tech: Jim Wolf Technology's Turbo Nissan QR25DE Powerhouse Part 2

By Mike Kojima

When we last left off on our QR25DE project, Jim Wolf Technology was well on the development path for our motor with new rods, pistons and the removal of the balance shafts.  JWT still had a few more tricks up their sleeves to help the motor make more power and to improve its reliability that we will get into in this installment.

Follow our project here!


 

Nissan VG30DETT

Engine Tech, Building the Nissan VG30DETT part 1

By Mike Kojima

Found in the 1990 to 1996 Nissan 300ZX twin turbos, the Nissan VG30DETT is a robust, sturdy engine right out of the box.  The VG30DETT like many Japanese engines of the era is pretty stoutly overbuilt in stock form, making it an excellent candidate for wringing high power levels out of it. 


 

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