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High performance RX7 Tuning
"Wankel engines, what goes around comes around."
The RX7 was the car that made the Rotary engine cool.With a displacement of only 1400cc it matches the power output of engines nearly twice that size. The beauty of the Rotary engine is that it can enjoy much higher speeds without being subject to the same internal forces as a reciprocating engine.
This means that you have a lot of scope for increasing the power without having to resort to extensive modifications. The turbo engine gives a lot of scope for tuning with the addition of a larger turbo, a hybrid turbo (uprated internals in a standard case) or a twin turbo setup. A remap will help release more power in all cases.
Weak spots include gearbox issues caused by loose mountings which can be addressed with a reinforcing frame. The issue usually manifests itself as an issue in 2nd-3rd gear changes and will get worse if ignored.
Oil leaks have also been reported but a number of specialist RX7 tuners offer stronger sumps with a better o ring seal.
The car is relatively light but this shouldn't stop you taking it further with a carbon fibre bonnet and even carbon fibre wings and panels.
A better flowing exhaust will help to improve peak power. Get an uprated intercooler to save the power lost by heat gains. If you are serious about power gains then lose the air conditioning and fit a larger intercooler mounted at an angle in the engine bay. The intercooler will benefit from a bonnet vent if possible.
A set of coilovers will stiffen the handling and if this is matched to a rear strut brace you can have a very sharply cornering RX7. Reinforcing the front and rear suspension turrets are beneficial and give noticeably improved handling on older cars.
When buying an RX7 you should ensure that it has been well looked after and properly serviced. These are specialist engines so need the attention of a specialist. Reports of unreliability and requirements to rebuild are largely unfounded provided the car is properly serviced and looked after.
We shouldn't really give attention to making the RX7 go faster without looking at the brakes. There is a nice range of large brakes available such as the KAD 356mm discs mated to 6 pot calipers.
Why not join us in our Mazda forum and meet our other resident RX7 owners and swap tuning tips and advice with them.
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