SR20 swap Underway (pics)
#201
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If they were rating the rotary as a 3.9L on the basis of that number being the sum of all the displacement of the combustion chambers, then they must be referring to a single rotor engine, something they never produced. A 13B rotary, if it were indeed feasible to rate the engine that way, would be a 7.8L. (1.3L * 3 chambers/rotor * 2 rotors).
I believe they were referring to the 20B as 3.9L because it follows the same rating convention of the 13B, being 1.3L per rotor.
Measuring the displacement of the engines in the same units, you will see that at any given RPM a "1.3L" rotary will be ingesting just as much air as a "2.6L" piston engine at the same RPM.
This is the comparison that matters.
This is the comparison that matters.
#202
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HP = (torque * RPM)/5252
So when the engine spins upwards of 15,000rpm, who needs 400 ft lbs+ of torque. The "high end power" is a result of high engine speed and moderate torque.
#203
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Holy ****, thats what an RX-7 is, and it just happens to be one of the best production road race cars ever.
Who would've ever thought that ****, wow.
Lets go put a bunch of different truck/economy engines in it now and ruin the balance of a well tuned chassis.
Incase you didn't notice, the NASA unlimited RWD class was won, by a rotary powered FD, not an LS1 powered FD.
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Azevedo
Other Engine Conversions - non V-8
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03-01-19 09:19 PM