Category Archive for "Tech Articles"

Subaru EJ vs. DIT engines: Critical Changes in Knock Control

Subaru’s new DIT (direct injected turbocharged) engines have replaced Subaru’s aged EJ series which have been found in Impreza, Forester and Legacy models since the 1990’s. While many things have changed, some appear the same. The knock control related functions

Read More

E85 Ethanol In a Non Flex Fuel Vehicle – Pros, Cons, Concerns

E85 fuel is an ethanol gasoline blend which offers performance advantages at drastically lower cost than race fuel. This attractive combination has taken the performance industry by storm. There are many articles about its basic properties. Rather than rehashing that,

Read More

The Subaru WRX EJ205, engine bearings, and you.

Innovative Tuning’s head tuner Mike started modifying Subarus with his 2002 model year WRX back in 2001. Spanning 2002-2005 model years in North America, we’ve been working on and tuning these 2 liter turbocharged cars for a long time know

Read More

Winter Fuel Economy Reduction – Causes and Helpful Hints

Each winter we at Innovative Tuning see posts on the internet and field concerns from our customers who often think they may have a significant issue with their vehicle based on a change in fuel economy. In the vast majority

Read More

Boost Creep – Definition, Causes, Solutions

World renowned turbo manufacturer Garrett defines boost creep as “a condition of rising boost levels past what the predetermined level has been set at.” Ideally a turbocharged engine will spool up, achieve target boost and match the per RPM boost

Read More

How An Intercooler Makes You Horsepower

I took the required formulas, found some actual values from a real car, and put it together so it’s easy for you guys to see how intake manifold air temp. relates to power output. Lets start with a 70 F

Read More