Which engine has a higher revving copacity before blowing up?, a rotary engine or a v8,v6.?

Question

in other words which one can take more abuse

Answer 1

http://www.expeditionexchange.com/tractech/
The rotary engine is able to reach and maintain higher rpm's over a normal piston engine 4 cycle engine. Because it uses intake and exhaust ports rather than valves, rocker arms, push tubes, lifters, cams........ . The rotary may become lower in efficiency (unless super charged) the higher the rpms go--but there are no valve train components to float or falter. The original rotary engine was made to run in the area of 25,000 rpms--but you had to disassemble the engine to get to the the spark plugs (no, not the Mazda generations), Why the rotary engine does have the mass of the rotors. It doesn't share the weakness of piston rods, the rotor turns in one direction, unlike a piston engine that goes from pushing the piston up to pulling it down--with a chance to pull the piston pin out the bottom of the piston. Back in the mid 80's I use to watch the 3 rotor engines crank out 700 hp racing in GTA and GTU classes. great difficulty to make these engines meet emissions standards of today.(intake and exhaust ports are fixed--can't adjust valve timing or cam profile--where there is not one)

Answer 2

A rotary engine is by far capable of higher revs for longer durations than any piston engine.

I currently have a 1988 RX-7 and a 2005 V6 Tiburon and I can't rev the Tib like I can the 7. If I did the engine would definately blow up!

I redline my 7 everytime I drive it (about 9,000 rpms) at least once during the ride, to keep carbon from building up in the engine, which can destroy the apex seals. If the seals crack a rebuild will have to be done.

Answer 3

In the way of sheer abuse, it's the V8.
The V8's are usually more solidily built, due to the fact that they usually go in to larger cars and vehicles, where the engines need to stand up to the abuse put on them by the sheer wieght of the car and other factors.
As for which can rev higher, it's the rotary engine.
The rotary engine has very little rotating mass, and what mass it does has, is very compact, meaning that there is a lot less weight rotating with each revolution, allowing it to rev higher. Where as V8's and 6's have more mass spinning, inhibiting their rev range.

But as for sheer abuse. It is the V8 that can take more abuse.

Answer 4

the big advantage with the rotary engine is the lack of moving parts. inside the block, there are only 3 moving pieces, so the chance of scattering any parts is just so much less, in a v6 there are so many moving assemblies. just look at the valve train alone for one cylinder.
the dis advantage is available power, you just can not shave the head to raise your compression. see if you can not find a rx7 club, or do some research and find the truck that used a rotary engine, if i remember correctly it was a 4 rotor engine but i could be wrong. just imagine 4 rotors that is the equivalent power of a v12 engine in a tiny spot, WOW.

Answer 5

In theory rotary engines don't have a red line but they do in reality due to overheating. I'd think a V8 would hold up best though.

Answer 6

a rotary engine will turn more rpm,s before blowing up,but some of the Chevy small blocks will crank a lot of rpm,s out also ,before blowing,i seen a 327 Chevy engine hit 975 rpms before it blew up,but when it let go ,there was nothing left of it,and the guy had a fortune in it also,good luck hope this helps.

Answer 7

I've been working with engines ever since I was a kid on the farm when the British Leyland Rotary Engines were all the rage in the US and I don't make it a habit to redline and blow up my engines...period

Answer 8

rotary engines require a lot of maintenance... but max RPM's depends on a lot more things than the size or type of engine

Answer 9

there is a video on streetfire.net of them revving an RX7 full throttle it took a realy long time for it to blow

Answer 10

if your talking factory not built it would be rotary