Bounter

What would you say about these ports, are they good or bad, would you use them?
In what way will these change the engine?

They are supposed to be medium streetports according to Pineapple.

Tha 3rd picture is a practice of the port I made on a junk center housing.

farberio

iTrader: (7)

I am no porting expert, but they look like they need to be cleaned up. There should be no hard edges.

K-Tune

iTrader: (26)

those are pretty mild ports...shouldn't affect idle too much and offer more power up top.

the port looks great except for the edges...i use a small points file to bevel the edges downward. you dont want anything sticking up that could catch a seal...

bad 83

iTrader: (3)

That's a small street port. It looks like you did a pretty good job. I really don't like the porting templates that widen the port toward the coolant seal. They make the corner seal hang over the intake port, plus you can't go back and bridgeport later if you wanted to. You can port match the center iron to the front and rear making all 4 ports the same size. All the older engines had the same size ports. Makes more power. This is one of my design bridgeports. This is on a S5 center iron.

A before and after shot.



MMMMM. Bridgeport.

-CON-

Looks cool ! Except I dont think you need that threre !

Bounter

Thats what I been told too and that's the reason I'm thinking of changing these templates to something else.
I don't think I have the skills of designing my own ports so I want to get some templates.

Where can I get some templates that don't widen the port?
I think the Mazdatrix port is wider on the center housing but not on the side housings.

Then we have Racing Beat but i don't know anything about their ports.
What more do we have?

It sucks that they don't show any pictures of the template on the housing!

RotaryEvolution

iTrader: (30)

wow, porting is about dynamics not about surface area.

pitch that practice center iron in the garbage. all you did was create a more unstable BP idle that doesn't create anymore power. hint: if you want to get more flow utilize the area closer towards the colant seals, even if you have to chamfer the rotor housing to get it. second hint: air flow is about a straight path, the more you can see sky through the port, the better, providing you are also taking into account port timing. only recommend not widening the port if you need that space for a wide bridge for a FBP, which the OP obviously isn't aiming towards and why would he? bridges give shitty *** fuel consumption for maybe an additional 10% more top end power at the WAYY top end at the cost of the bottom end.

it baffles me why people think that bigger is better in porting. bench tests are also bullshit, bench tests don't apply to an assembled engine both pushing and pulling air as well as the resonance factor a running engine has.

this is all my personal opinion of course, but my customers all seem to be pretty happy with the results. bridges sound nice but i don't try to sell them because i'm not a bridge salesman.

Bounter

I'm not going get a bridge later, all I want is a decent streetport that don't shorten the engine life too much.

bad 83

iTrader: (3)

Just so you guys know. My last 12A bridgeport I ported made 178 RWHP with a 45 Mikuni sidedraft and 2 1/2" exhaust. The car got 18-20 miles per gallon driving around town. The stigma with bridgporting and horrible fuel milage is BS. It's all in how you drive it. I agree, if your just looking for a little more power, than stick with a street port. Just PLEASE don't waste your time without port matching the center iron with the front and rear. That will increase your power way more than that little Pinnaple center port.

Bounter

So you're saying I should make the primary and secondary port the same size, just as you have done on your pictures?

Do people only design their own ports and have nothing to say about the Mazdatrix, Racing Beat or any other companys templates?

RotaryEvolution

iTrader: (30)

i use the racing beat templates but i do modify them some but they work fine. i probably wouldn't suggest port matching primary and secondary ports unless you have a standalone or are running a carbed setup. it may work but you may also run into some issues with the AFM not liking it.

bad 83

iTrader: (3)

I have run the ports matched with a stock ecu without any issues. The engine that is in my turbo FB has all 4 intake ports the same. The housing have also been ported. I made 245 rwhp with the stock turbo and 8 pounds of boost. Right now I am running 15 psi and the car is scary. Breaking loose in third can make you a little nervous. Mods in the sig.