13B Displacement
05-29-02, 05:51 PM
#1
Full Member
Thread Starter
Join Date: Feb 2002
Location: Portland, OR
Posts: 100
Likes: 0
Received 0 Likes
on
0 Posts
13B Displacement
Ever since I've learned about RX-7s I've heard that the 13B-REW in them is 1.3L. Now I keep hearing that it's actually 1.3L per rotor (or something) putting them up to 2.6L. My questions is this: WTF?
05-29-02, 07:49 PM
#3
Old [Sch|F]ool
Ratary diplacement is measured per revolution, similar to a two-cycle piston engine. 4-stroke piston engines are measured per two revolutions.
What this means is a 1.3l rotary is analogous to a 1.3l two-cycle or a 2.6l four-cycle engine.
What this means is a 1.3l rotary is analogous to a 1.3l two-cycle or a 2.6l four-cycle engine.
05-29-02, 10:04 PM
#4
Rotary Enthusiast
most compare to 4-stroke piston engines, that are rated based on air displaced in one full cycle, which takes 2 revs.
start with 2L acura, 2L of air pumped in 2 revs (at 100% pumping efficiency)
the rotary displacement is listed for one rev, so a 1.3L pumps 2.6L in 2 revs.
the 2 stroke is also rated for one rev, so old smokey 750 cc kawasaki pumps 1.5L in 2 revs.
start with 2L acura, 2L of air pumped in 2 revs (at 100% pumping efficiency)
the rotary displacement is listed for one rev, so a 1.3L pumps 2.6L in 2 revs.
the 2 stroke is also rated for one rev, so old smokey 750 cc kawasaki pumps 1.5L in 2 revs.
Thread
Thread Starter
Forum
Replies
Last Post
LongDuck
1st Generation Specific (1979-1985)
12
10-07-15 08:12 PM
13, 13b, 13bdisplacement, 13brew, 13l, 26, calculation, dispalcement, displacement, displacment, increase, liter, mazda, rotary, rx7
