Mazda 13B-REW
The 13B-REW is a modern marvel; small, light but possessing a heavyweight punch, the rotary is a legend. From the drag strips of Puerto Rico, to Victory Lane at Le Mans in 1991 to the streets of America the 13B has been a prime-time player.
When it comes to tuning, the Mazda 13B rotary is a tread carefully proposition. Tuning must be tidy because the engine's apex seals are decidedly detonation intolerant. One unkind pop and it can be game over. The 13B is a MAP system so the ECU reads off fixed tables and is unable to compensate for modifications that reduces restriction and changes the volumetric efficiency of the engine.
The 13B is a 'Spaghetti Western' in that it has vacuum lines snaking all over the engine bay, like 67 of them. Mishandle them and you'll pay the price with a poor running or stalled engine. Compromise a boost line and you can go lean and bang. With the 13B's testy relationship with detonation an intercooler upgrade is key when turning up the boost. Also install proper gauges, like boost, water temp and oil pressure, and watch the coolant temp; FDs are on the edge in stock trim so be prepared to step up. It should be noted that precision assembly is key to a long rotary life.
Stock [230 - 240 WHP]
Stage 1 [290 - 300 WHP]
Intake [A'PEXi Power Intake] [HKS Super Mega Flow]
Exhaust cat-back [HKS Hi-Power] [Racing Beat]
Downpipe [HKS]
Turbo [Stock Sequential Twins, Stock 10.5 psi]
Stage 2 [370 -380 WHP]
Boost Control 15-16 psi [A'PEXi Super AVC-R]
Intercooler [GReddy 3-row FMIC]
Fuel System [Walbro 255 lph pump] [Mazda Cosmo pump] [720cc Primary Injectors] [1000cc Secondary Injectors] [RR Fuel Pressure Regulator]
Mid-pipe [GReddy] [JIC Magic]
Cooling System [Radiator Upgrade]
Tuning [A'PEXi Power FC] [HKS FCON V-Pro]
Stage 3 [450+ WHP]
Turbo single turbo upgrade kit [HKS] [GReddy]
[Garrett GT-series]
Intake [GReddy elbow] [3-BAR MAP Sensor]
Fuel System [1200cc Primary Injectors] [1600cc
Secondary Injectors]
Rotors [Street Port] [Ceramic Apex Seals]
Engine [Oil Coolers] [GReddy] [ARC]
Tuning [HKS FCON V-Pro]
Mitsubishi 4B11T Evo X
The "new" 4B11T engine used in the Evo X has proven to make exceptional power, maybe even more than the 4G63 part-for-part. The durability of the engine has proven to be very good, too, but the weaknesses of the aluminum block have also shown up as cylinder pressure climbs. The top of the bores have shown distortion between where they are webbed in the very top inch of the block. Some of this can be traced to poor tuning and detonation, which of course makes the cylinder pressures climb astronomically. The other challenge in the beginning was tuning past the airflow and torque limiters. Thanks to many people involved in the open source tuning world, those challenges are less and less with each passing day and it is now very easy to tune the engines. - David Buschur, Buschur Racing
Stock [237 WHP, Buschur Racing Mustang MD500SE ]
Stage 1 [310 WHP]
Exhaust [Buschur Racing 3-inch Stainless Cross Flow system]
Intake [K&N open element filter]
Tuning [Buschur Racing ECU Flash]
Stage 2 [320-325 WHP]
Pipes [Buschur Racing 2.5-inch Charge Pipes]
Intake [Buschur Racing 3-inch MAF Inlet Pipe]
Stage 3 [375-380 WHP]
Cams [Cosworth]
Intercooler [Buschur Racing 4.5-inch Race FMIC]
Tuning [Buschur Racing ECU Flash]
Source:
Buschur Racing
test3
buschurracing.com
440.839.1900
Mitsubishi 4B11T Ralliart
The Mitsubishi Ralliart is underrated, yet it has the same 4B11T motor that comes in the Evo X, so it comes with the same pistons, rods, cylinder head, fuel injectors and more. Ralliarts do not run super rich stock like the Evo X. The main differences from the Evo X are the smaller TD04 turbo and smaller intercooler. Add in some underhood packaging differences (Ralliart has the battery under the hood, Evo X in the trunk) and some rear axle/exhaust routing differences and you end up with some Evo X stock and aftermarket upgrade parts being a direct bolt on... and others not. Bottom line: Engine for engine, the Ralliart has the potential to make all the power that the Evo X MR can make. - Mike Welsh, Road Race Engineering