Garrett’s GT40 just screams out potential when your glancing into the compressor inlet. Garrett has always done a great job at engineering turbo’s especially for the jap crew, however the GT4088r is a funny turbo because it’s rated at 370 – 650hp but it’s recommended for use on 3.5 – 5.0L engines, so it would be ideal for 6 cylinders or larger, I did find it funny that after doing research we found a lot of Honda boys running the GT40’s.

Again a straight forward set up like all Garrett’s mid range turbos, oil and water cooled CHRA, external waste gate, T4 flanged twin scroll turbine housing, it also does feature a ported compressor housing to increase protection against surge. Being such a large ball bearing turbo and for its price it certainly is a steal, great for any low RPM large displacement engines, but I would not recommend it on a Honda Civic.

RRP $1900

Tech Specs

Rated HP: 650

The Trust T78 is a widely known Turbo that is very popular due to its boost capabilities and extremely large compressor flow. Designed by Trust / Greddy and Built buy Mitsubishi it is one of most sought after journal bearing turbo’s in the 700hp range.

With well over 20 years of performance & turbocharger experience the T78-33d is from Greddy / Trust’s large hybrid T-power series of turbos that feature an extra large free floating journal bushing with a large diameter center shaft for robust performance, testing has revealed that some of these Trust / Mitsubishi turbos have better response than similar sized ball bearing competitors in certain applications. three different turbine housings are available for the T78 all with a T4 flange and the option 80mm or 94mm V-band or 4 bolt flange outlet with various A/R meaning choosing properly sized housings can mean all the difference in usable power. The T78 uses an oil only CHRA (center cartridge) which does make a easy installation.

Very popular on bolt on kits for the RB26, 1JZ and 2JZ engines it is not to hard to source one, you will have to consider that due to the size of the turbo the T78 will not hit 20psi until about 4500rpm, depending on the A/R of your housing, but it will hold it right up to red line. They have even been seen bolted up to engines as small as the CA18, the only other turbo that would compare closest tot eh T78-33d would be the GT37, being rated at 720hp and down side being a bit laggy I would recommend the T78 for drag / track applications, for drifting and low down torque I would be going down the GT30 / AX75 path.

RRP $2500

Tech Specs

Rated HP: 710

Apexi’s AX75 is one of the most sought after turbochargers in the jap market and is especially popular amongst the rotary’s. the AX75F82 is a ball bearing turbo that is designed for high power output with a rating of 550-650HP. It spools up very fast and it Keeps on pulling until redline. The AX75F82 is Engineered by Apexi and Built by IHI and from the examples people have seen and the specs of the turbo the compressor and turbine are well matched to suit 2.0L up to 3.8L engines. Some people have pulled as much as 480 rwhp on a mildly modified RB25. On a RB25 it will hit full boost at 4,000rpm so there is a bit of delay compared to the twin setup or a Blitz K3 but keep in mind they are designed for mid-range to top end power.

The AX 75 features the “AIRICK system” which is a patented material that is inserted between the compressor housing and the compressor wheel. The insertion of this material allows near 0 clearance between the blade and housing improving compressor efficiency by almost 5-6% all across the board. AIRICK also lowers compressor outlet temperatures under high load by 50-68 degrees F. not only will it improve the overall efficiency of the turbo but also enhances boost response. The inlet flange is a T4 and has a 3 inch turbine outlet, it will only run an external wastegate (recommended size is 50mm), the working pressure is 18 – 26psi with a max boost of 30psi, it really is a fantastic baller for anyone looking for 600hp on a single turbo setup. They are no longer being manifactured but can be found if you search hard enough.

RRP $1600

Tech Specs

Out of every Turbo I have ever seen the Borg Warner EFR-6758 would have to be the Best, the most reliable and Fast spooling Turbo in the 275-450HP range, I mean it has to be the biggest breakthrough in turbocharger technology sine the GT28RS.

BorgWarner EFR (Engineered For Racing) series of turbochargers are a truly remarkable piece of automotive technology, with just about as much engineering as Toyota’s 1UZFE it really is well built. First off by looking at the comp cover we can tell it’s no ordinary Turbocharger, It features a Boost Control Solenoid , and also a Blow Off Valve (BOV) built into the comp cover, all of Borg Warners AFR’s series have this feature. Like most entry level racing turbo’s it has a high flow internal wastegate and there are two options for the exhaust housing, a T25 inlet flange along side a 3″ V-band downpipe discharge with .64 A/R or Twin scroll housing with a divided T4 Inlet flange with the 3″ V-band downpipe discharge but with .92 A/R.

Inside the CHRA we have Dual Row Ceramic Ball Bearing’s which are the most durable and fastest spooling bearing technology every manufactured to this day, and on the compressor side there is a funky looking wheel that is Forged & Milled for strength and lightweight, the whole turbo has a temperature resistance up to 1,050°C, even durability is excellent with twin deals on the compressor and turbine ends of the CHRA to less oil seepage. Although the center is water-cooled it is not mandatory but recommended by BorgWarner, another first I have ever seen it features a built in oil restrictor.

The EFR-6758 is supposed to be equivalent to Garrett’s GT30r but I see for the price the EFR turbo’s are more advanced, there have been reports of these turbochargers bolted on 2.0L engines and have spooled to 25PSI by 2000rpm !! Rated at 275hp-450hp for small engines or up to 1000hp in twin turbo setups it really is a great all rounder and with a working pressure of 10-25 psi and a max boost of 27.8psi it really does kick ass. For a ball bearing turbo it really does have a competitive price and funky look.

RRP $1600

Tech Specs