Hi guys, i have mounted the Blitz Nur Spec R cat-back * and the HKS air filter in the stock box.
I tested the car before and later in the Dyno to see the effective gain of power and the power jumped from 242.5 Hp (the stock power in europe for the RX 7 is 243 Hp due to the more restrictive emission law tha USA RX7 that has 255 Hp) at 272.3 Hp.
I'm very happy, beatifull sound of the exhaust without the inner silencer (with in, i not yet checked).
Drive the car is about the same, it has lost a bit of power below 2000-2500 rpm, but it is more powerfull above these rpm.
I suggest this modification, the care is more funny to drive, and in the highway, you really fell the power above 140 kmh (100mph).


*(different from the normal Nur Spec that you have in the USA, it have a removable buffle to change sound and power, this buffle is bolt on in your Blitz Nur Spec, but you can't leave it)

 

30 to the wheels! That's pretty good.

 

Strang though, are you estimating the gains at the crank or the wheels? As most everyone knows, the claimed HP rated by the factory is always at the crank.

 

The power is:
stock: Engine 242.5 Hp 6085 rpm
Wheel 211.6 Hp
Torque 329.9 Nm at 4219 rpm

tuned: Engine 272.7 Hp 6597 rpm
Whell 238.4 Hp
torqe 316.3 Nm at 4578 rpm

The pressure was 1022 millibar
and the temperature was 27C°

What do you think about the torque lost??

I attach the dyno chart stock and tuned.
Thanks

 

This is the dyno chart with the Blitz nur spec R and the HKS air filter the stock box.

See and tell me what you think about

 

not bad at all. Just confusing by your first post, I was thinking you had 279 rwhp! I was like