Ap1 vs rx8
Joined: Apr 2005
Posts: 970
Likes: 2
Originally Posted by Spartikus,Oct 29 2006, 03:30 PM
A rotary engine goes through power strokes roughly twice as fast as a 4-stroke engine, so sometimes they are considered as double their physical displacement.
Also, I've seen RX8's dyno 30whp less than an S2k on the same dyno. They are at about 170whp stock, so don't believe too much of what Mazda says about the hp.
Also, I've seen RX8's dyno 30whp less than an S2k on the same dyno. They are at about 170whp stock, so don't believe too much of what Mazda says about the hp.
so much for that carbon fiber driveshaft minimizing drivetrain loss
Registered User
Joined: Jul 2005
Posts: 1,670
Likes: 0
From: Gie
It is very difficult to compare specific output of a rotary engine to that of a piston engine. Too many differences in too many areas.
A more telling comparison would be to measure the power output per amount of fuel consumed. This would take the number of pistons/number of rotors variable out of the equation altogether.
1. Rev each engine to it's max power operating point. Lock the dyno.
2. Measure power output.
3. Measure fuel consumption.
From what I've read about the Renesis motor, it would NOT shine at all in this test.
A more telling comparison would be to measure the power output per amount of fuel consumed. This would take the number of pistons/number of rotors variable out of the equation altogether.
1. Rev each engine to it's max power operating point. Lock the dyno.
2. Measure power output.
3. Measure fuel consumption.
From what I've read about the Renesis motor, it would NOT shine at all in this test.
Registered User
Joined: Jul 2005
Posts: 1,670
Likes: 0
From: Gie
Originally Posted by s2krazy01,Oct 30 2006, 12:01 AM
i figured they were 3 times faster since a rotor will produce 3 strokes/rotation whereas a 4-piston motor will only produce 1.
so much for that carbon fiber driveshaft minimizing drivetrain loss
so much for that carbon fiber driveshaft minimizing drivetrain loss
There are three power pulses per one rotation of an indidual rotor.
The Renesis motor (2 rotors). Has two power pulses per one rotation of the output shaft.
Thread
Thread Starter
Forum
Replies
Last Post