today i was bored and decided to start portin my engine in the shop, did i go to far with the primary port for a street port?? i didnt have a template, so im not sure thanks guys

 

one more pic

 

It'll make a lovely bookend...

 

so i went too far, thats all good, it was just sittin there anyways

 

Isn't that a secondary port?

 

well, does anyone have the front end housin, a rear rotor housing and rear rotor for an 86-88 n/a?? its an extra engine, i would like to port it myself and just have it as an extra engine sittin around, templates are a good thing

 

primary, secondary whatever sorry primary is the mid housing ports huh?? so secondary yes lol

 

Yeah the secondary is the one with the 5/6 ports. Mazdatrix sells the templates, but you still have to cut em out yourself

 

i really dont know much about porting.. but.. if its big.. isnt it just called a different name? like extend port, or large street port? and it gives more power?

 

Here, check out this 6port layout. It may help

 

Look carefully at the picture above. See where it says "corner seal track"? You CANNOT remove any metal from where this track passes, otherwise the corner seal will fall into the port! This is what the bridge in a bridgeport is there for. This is what you've done wrong. If you're gonna to some porting get some templates.

 

you grind in the area's marked in red - these become the edges of the ports, if you thought you were doing the right thing with the ports you did, i suggest you spend an entire day sitting on yo **** on the internet and dig up everything you can about intake porting a rotary engine and what difference each part makes. i scanned an article about it and i can probably dig it up for you if you want.

otherwise i would suggest leaving porting to someone who has done it before

 

i mean no disrespect by my statement.

porting is actually pretty easy if you have

a template
a steady hand
earplugs
a saturday

just pay attention to what you are doing. almost everything you need to know about side housing port modification can be found on mazdatrix's website. they show a few pictures and give a brief description of the process. they also tell you what to look out for. i studied their information, bought a template, and had no problems. the thing to look out for is to modify the port CHANNELS as well as the port FACES, except ports 5 and 6 of course. the walkthru i read didnt include that information. just visualize the shape you are after and get to it slowly. always keep your water jackets in mind as well.

be careful when porting and all you have to spend is $30.00 or less on a template, and can have the project completed much quicker and cheaper.

 

I thought I read somewhere before that the 6p housing is not bridge portable... tho, it kinda looks like it may be from that pic.. is it?

-Tesla

 

hahaha, damn i went too far, poor corner seals lol, oh well, learning experience

 

The problem is not in the engine block or the port, its in the timing and the manifolds. Bridging the secondary ports and grinding the 2 ports into one gives more timing than a PP(opens same time as a PP, but closes later. You have to have a BIG short runner manifold to not lose power from this. To keep it simple, you cant do it unless you want to shend the money to have it done right, including dyno time to tune the intake runners for the ports.

 

bringing a post back .Anyways can anyone post the picture that "Felix Wankel" had posted (I cant get it) so i could see where the corner seal trail is? I am planning on porting my own engine but I want to know everything I can before I start.

BJ White

 

here

 

There's no flame intended here!

Would you randomly grind a new cam for your piston engine? I doubt it. That's what you're doing when you port an engine without templates. Changing the ports give the same effects as changing cams. If you really want your engine to perform to its maximum capability you need to take advantage of all the testing done by pros.

 

You should really get a Mazdatrix template, as a matter of fact get both intake and exhaust. Mark with ink and then grind...

 

And if you intend to grind the exhaust ports, get TII rotor housings. They don't have the exhaust splitter in the way, and are much easier to port (so I hear).

Ren

 

I am planning on buying the templates but I want to investigate it as much as I can into how the porting/timing works as well as where I can and cannot cut.This way I wont be sitting there cutting away metal (with templates) and not knowing what the hell I am doing I liek to research EVERY little thing about what I do to my car before it is done so I know the pros/cons of it.Thanks for all the info though

BJ White

 

Read and be edumicated!

http://www.rotaryengineillustrated.c...-ports101.html

 

Thanks that page is GREAT,one of the best yet

BJ White

 

looks like soeone was having some fun milling the engine