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RX7 with 700 hp 13B 

Introduction / Photos


Introduction:

In June 2002 I met (though a good friend) a guy who was building up a tough, street legal RX7.
The design brief was for ultimate power from a 13B-REW. I am told that the original engine was replaced with a rebuilt import engine by a 'well known' rotary workshop in Melbourne - but it lasted only a day due to the waste gate not being correctly adjusted when it was installed, consequently running full boost into the new engine (20+ PSI). Because of this the original engine was dusted off, rebuilt and installed in the car.

For comparison, a similarly specified 1986-1998 RX7 TurboII for a Corolla drag car produced just over 500 rear wheel horsepower at around 20PSI boost on the dyno ('Calculated' to be Flywheel horsepower of 650). The 13B-REW has thicker metal in the intake port area than the earlier TurboII allowing the ports to be around 30% bigger, hence it is estimated that once this engine is complete and tuned it will produce somewhere in the region of 700 flywheel horsepower.

Let's see how this compares to some of the most desirable road legal vehicles available:
RX7 = 1300kg/700hp (1kW=1.39hp) ~= 2.6 kg/kW
Ferrari F50 = 1350kg/387.9kW = 3.48 kg/kW
Lamborghini Diablo GTR = 1395kg/440kW = 3.17 kg/kW
Suzuki Hyabusa motorcycle (wt inc rider) = 430kg/172hp = 3.47kg/kW
McLaren F1 = 1138kg/467.7kW = 2.43kg/kW
While a better power-weight ratio does not guarantee better performance, it is still fast company. Bear in mind that the total cost of the engine conversion including the turbo, manifolds, intercooler, computer, clutch, exhaust etc is less than the cost of the Suzuki.

Stay tuned - I will add more photos when the car is complete and a complete write up from the owner and/or the technician doing the build-up.

Photos:


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External waste gate
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'Trust' Intercooler
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Relocated A/C condenser
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Twin plate 1100hp clutch
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RX7-SP differential
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Slotted brake rotors
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RE-Amemiya 17" wheels
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This page last updated 15/6/2002
Update History:
17/6/2002 - Added supercar/bike comparison
15/6/2002 - Created page
 

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