crxracer

Does this apply to rotaries and is it possible to achieve by changing port timing

misterstyx69

iTrader: (142)

sorry..what the heck is Exhaust initiated induction?!
Do you mean Turbo?.

crxracer

On a piston engine it is when timing and exhaust is perfectly in sync and the pressure difference applies suction to the intake port allowing a na motor to run slightly above atmospheric pressure

misterstyx69

iTrader: (142)

Ya learn something new every day..
This would be interesting to know.

Evil Aviator

That is called "scavenging", and you are referencing an engine tuning technique called "overlap". This video explains valve overlap on a piston engine.

See this link for how overlap works on rotary engines.
Rotary Engine Illustrated

If you want more technical information, port timing is covered in the Kenichi Yamamoto books.
Foxed.ca - Mazda RX-7 Manuals

One of the best things about this forum is that I can learn the new terms that the internet generation makes up for things that have been around for decades. This keeps me younger than my coworkers, at least in my mind anyway.

crxracer

Actually learned it reading david vizards budget built v8 book was just wondering if it transferred over to rotaries, and thanks for the info cleared that up for me. Side note some of us youngsters actually read books still

Sgtblue

iTrader: (16)

It's also discussed in Werner's book "Street Rotary", and (IIRC), yes it's possible in a rotary.

Evil Aviator

Hmm, the David Vizard articles that I have read used the standard "scavenging" term, although he likes to make an argument that it is effectively a fifth cycle. He must have made up that term for his fifth-cycle theory. I guess I am going to need to read some more of his works so I can catch up on things. See, like I said, this website is great for learning all of the new made-up terms. (All terms were originally made-up at some point in time).

Good, that Foxed website should keep you busy, lol.