Greg

Are anuses unpleasant?

I remember going 140 mph stop light to stop light in a RX4 when I was in high school. The guy driving was a real unpleasant anus.

Dave Stohler

I'm sorry if I came off as a prig, but this happens to me all the time, especially concerning automobile engines. I've spent the better part of a decade as an automotive engineer, but anytime I go to a party there's always some guy who "knows more than me". Of course, he doesn't know anything, but I have to keep listening, biting my tongue, and looking for a way to slip away. Ugh!

iamlucky13

My bad. To think I went all these years thinking radial and rotary were the same. I'm heading over to google right now to fix that deficit of knowledge.

Rev.Chuck

Dave is right (no reason to be a jerk, thats ok tho, his name is taped to my heavy bag right now.) The wankel does have four distinct phases so it does not work like a two stroke(Something I am familar with, certified by Echo/Kioritz, Kawasaki, and Suzuki, since '85) Still looks a lot like a two stroke cycle and one revolution: apex passes intake port opening chamber, the chamber fills til the second seal closes the port, the chamber moves into the compression area of the housing, the plug fires and the chamber moves into the mirror image expansionarea of the housing, the first seal passes the edge of the exhaust port and spent gasses start to egress urged on by the trailing apex. Is that correct? I have never had my hands on a rotary while I have worked on thousands of two strokes (Including Detroits, my first job out of tech school) and many hundreds of four stoke gas and diesel motors.

Dave Stohler

For the record, all 2-strokes have one thing in common, and that is a pressurized intake. Without some form of blower (or even, as in a simple 1-cylider, crankcase pressure), a 2-stroke will not run. This is not the case with a Wankel rotary. It does not need pressurized intake to work.

SD Fixed

Perhaps I should, but sometimes to get a point across, it takes a slight jab to get the attention.

Now that Dave and Rev. Chuck have leveled it out, it's all fine.

Ironically, at least the three of us use our real names.

Rev.Chuck

It may be coincidence but Dave Stohler is the name of Dennis Christophers character in "Breaking Away"

h8r

How Rotary Engines Work

rotorheadray

I had to join and make a comment here and set u all straight

a rotary engine does use the phasing of a four stroke engine suck/push/bang/blo but its processes are much different due to the movement of the rotor......but it isnt technically a 4 stroke because there are no strokes

a rotaries rotor tips(apex)and seals to housing and end plate lubrication works just like a 2 strokes lubrication system but around the figure of 100 to 1 ratio of oil to fuel due to the inner surface being chrome plated it doesnt require the amount of oil to keep it going usually its administered one of 3 ways ,either 2 little pipes that feeds into fuel float bowl from a small pump connected and driven from the front of the eccentric shaft(crank shaft)or it feeds directly into rotor housing or directly into inlet manifold

The people that dont like them and have had trouble with them generally dont know how to treat them as they are different and require different attitudes (like diesels need the glo plugs warmed up before starting)and rotaries need to be warmed up before driving them ..ive had my rotary powered car for 15 years nd the motor has never been touched other than the routine maintenance and is driven every day!!!
and on the economy issue the rotary engines design was actually originally a supercharger and redisgned into an internal compustion engine so its just a big pump but when u compare an engine of the equivalent power it aint all that bad but what other engine can rev like it does???
So basically u both were right in your own way but didnt realise it !!!!!!!

https://members.dodo.net.au/~quickservice/index.html

Ray ...My 2 bobs worth

rotorheadray

Oh yea i forgot
and there is 2 power strokes per revolution on a 2 rotor engine!!!!!

mrdoright0405

The RX7 cars are fast. But engines are no good after 100K miles.

Desk Rider

Actually, Fritz Wankel is German and the rotary engine was first built in 1957 in Germany (read on the Antique Autombile Club of America website).

These Germans have invented it all (4 cycle engine, aircraft jet engine, diesel engine), haven't they?

khuon

Well, technically Sir Frank Whittle just edged out Dr. Hans von Ohain by a nose as the inventor of the jet engine. Whittle also claims first place for filing the patent and working prototype but Ohain's design was the first to actually fly in an airplane. Both worked on their relative designs independently and without knowledge of the other. I guess it's sort of like how calculus was invented independently by both Newton and Leibniz although some people have argued that Fermat was the real inventor of calculus.

Doctor Who

Wrong.

Tell that to my 1988 GXL RX-7 that had 130K on it when it was rear-ended by a semi, and thusly totalled.

Or my 1989 GXL autocrosser that had 189K miles on the original engine when I blew an oil seal while shifting at 8K RPM.

Or my friend's 1985 GSL-SE that has well over 200K on the original engine, and still drives great.

Or a gentleman from the Cincinnati RX-7 club that replaced the original engine in his 1993 twin-turbo RX-7 at 140K miles.

Wankel motors aren't timebombs.

Cwaters

Don't be silly.
My 160K 86 RX-7 is rinning fine. It needs some lovin' but, then, so does my 160K Civic and IT is nine years newer...

Another post said that a rotary that uses oil is in trouble. A point of clarification on that: All the 12A and 13B engines are designed to use oil. They actually have a mechinism that injects oil into the intake charge to help cool the rotors and apex seals.

Like all cars of their age, these RX-7s have their issues but the longevity of the engine isn't one of them.

Cory

miamijim

You guys should lighten up...whats wrong with american muscle? it moves my bike and my car.

Quote:Originally posted by late
Attack, you mean like describing someone as an unpleasant body orifice?


Are anuses unpleasant?

I remember going 140 mph stop light to stop light in a RX4 when I was in high school. The guy driving was a real unpleasant anus.

Speaking of backsides.

seely

Truthfully I have seen FAR more RX-7's that need a new engine at 80-120k mi than any other car I have considered buying. I wanted one for a long time but couldn't find one that was running right. No one will work on them anymore, and all the ones I looked at burned oil or were in need of a rebuild

apple_quit

i'd hate to know what to do to have a freer flowing exhaust

gcthree

Geez, I just read some old posts on the Spinergy Rev X wheels I've been riding, and now all this stuff about my '93 TT RX7 being a timebomb...what's a guy to do? Actually, I did blow the motor at 33,000 miles, but I was putting 15 lbs. of boost into it, and well, I learned the hard way that octane boosters that claim to raise the octane numbers by 2 points actually mean .2 points, as in 93.2...not 95! So, these days, my streetported RX7 feasts on a diet of 100 octane unleaded, and it's bulletproof.