Mazda RX7 FD HT12 Stage 1 Turbocharger Upgrades 1992-1998

REQUIRES CORE - MUST READ INSTRUCTIONS

CORE INSTRUCTIONS

The Stage 1 HT12 turbochargers require a core upon build up.  No Y pipe needed with the core.  Since we reverted back to modified HT12’s there isn’t a need to extend it like we did on the older upgrades.

Here are all the details on the BNR Stage 1 HT12’s!

• GT28 Casting turbine wheel 
• Left hand shaft nut 
• high performance 360 degree, dynamic thrust assembly(dual feed)
• Dynamic, billet seal plate (less drag than stock carbon seal setup)
• BNR’s drop in Gen 2 Billet compressor wheel upgrade (requires no modification to the compressor housing and 15% more peak flow over stock cast compressor wheel)
• Dynamically balanced less than .5 gram/in2 as a rotating assembly
• O ring grooved bearing housing (eliminate the silicone mess that’s normal)
• Ported wastegate (30mm)
• Radius put on the secondary turbine inlet (cuts down on cracking)
• Upgraded Actuator assemblies which have 3 additional psi over stock 7 psi actuators.  The additional spring pressure will help you generate more boost even with the OEM boost control solenoids.