Side port is another term for street port, right?

The term Japanese tuners seem to use for a minor porting is side port (ie, it doesn't change the open/close timing because it only widens it to the sides?), so I figure that's the same street port.

 

never heard that before, but if it's true then its bound to cause some confusion here.

 

Widening to the side *does* change the opening timing.

The way I understand it, side port is anything using the conventional ports. ie, anything besides pp.

 

I mean the sides that are facing the inside and outside of the irons, not the sides going around the iron..

I guess I forgot to specify.

They always specify either normal, side, bridge, or peripheral.

Funny story, I walked into an RE Amemiya garage to look around (found it by accident 200 feet from where I lived), and asked the dude what kind of port he was doing, and he said "peri-port" and I just sort of had a "huh?" look on my face, and he told me "peripheral," although I still didn't know what a peripheral port was until about 3 months ago...

 

I don't understand what you mean. There's only two ways you can port, extend the opening or extend the closing timing.

If you're talking about only working on the runners then it's still a standard port IMHO.

 

yeah ... as far as i know, side port covers stockports, any variations of streetports and bridgeys. only peripherals are different. i'm not sure i'm understanding what you described either.

 

side port does not equal street port

 

Side port means the ports are on the sides of the combustion chamber (i.e. irons). It is the way the ports are from the factory. There are many variations of the sideport (stock, street, bridge, blah blah).

Peripheral ports are ports that are on the rotor housings themselves. Exhaust ports are peripheral ports (aside from the renisis). NSU's had peripheral intake ports, and many high performance motors seal the stock side ports and drill into the rotor housings to create peripheral intake ports.

That aside:
All squares are rectangles, but not all rectangles are squares.
All streetports are sideports, but not all sideports are streetports.

-Marques

 

I know 2 guys that are stationed here that used to be stationed in Japan. What we call a street port in the US is commonly called a Side Port in Japan. So if I were to say "I'm getting my engine street ported", then they would say "I'm getting my engine side ported".

 

Correct!

 

YEP, that's what they say in Japan....Side=Street

 

in Puerto Rico , Overlap y Escape = streetport
Puente= bridgeport

 

Well I figured the if port was a square (which it isn't entirely, but close enough) going in the circumfurence would effect the timing, whereas only going in and out (in terms of the rotary's rotation) wouldn't quite so much...

Anyway...

I was pretty much right, at least as far as the common Japanese terms go...

Personally I think side port is a much better term, as "street port" is a VERY subjective concept

And for the record, they *always* distinguish between bridge and side... so I assume that side refers to anything that doesn't extend past the corner seals and isn't a peri-port, but also isn't a stock port ("normal" in Japanese).

 

your right V,

Side port in JN is saying street port in english, has been for the last 20 years I have been in Japan. Just different terminology for different folks.

kenn