I found a website with a couple videos of a mighty mighty FC. It idles like ****, but it pulled like an F1 car on the dyno. They said it had "bridgeport."

Sooo, to cut down on word count and to get to the point, what's a bridgeport?

 

A bridge port is a type of porting you can do to the intake side of the engine.


http://www.mazdatrix.com/faq/portbp.htm

That is what it looks like


-Zach

 

makes power higher up the rev range than a normal port or a street port does, pulls like a train from 4500 to 9000ish depending on the size and sepc of the turbo that it is flowing into

 

It worths the money where you use it to race for $$$$$$$

 

What website had the videos you looked at?

 

Im gettin my engine rebuilt and I was thinking of getting it bridgeported or at least street ported or something.
I know bridgeporting is better than street porting, but does bridgeporting lower the life span of the engine or does it do any harm to the engine?
thanks

 

soul has some videos of his "half-bridge" at idle (pulling out of parking spot, then turning around and pulling back in)

http://home.attbi.com/~node10/soulbridgeidle.wmv

 

Brideporting is going to lower the life span of the motor compared to a stock motor or a mild street port.

 

You should be happy with a streetport/exhaust port as a daily driver. The bridge port does significantly lower the life of your motor since the corner seal has only has that little bit of clearance to go over so it won't fall into the intake port.

But do what you want! If you can do it yourself and have access to a lot of intermediate/end housings and can rebuild them in one day, well then go ahead

 

Logically, I don't see your point. The intake port is a minor part of the vaast area the corner seal sweeps against, and besides, it's already open on one side of the path anyway, a bridge just opens up the other side. I can understand lower life due to higher revs used (I just blew a STREET ported engine after 23kmi, and I never went over 8500, had sensible ignition timing, and it was non turbo besides) but I don't buy the corner seal argument.

On the other hand, if anyone can show hard data, I'm listening.

 

Does BRIDGEPORT make your idle sound like: prat prat prat prat prat??? yknow like rotary race cars..

 

its gets you well on the way, it all depends on how much overlap it creates

bridge ports do have a nice brapping idle......

 

How does the the p port sound at idle? I am building a p port 12 A now for my rx-3 SP, but I have never heard one run. Since there is so much overlap do they realy sound choppy? Any ways I think I am going to have it running by spring break and I will make sure to get a vid of it running on here.

CJG

 

i'll upload a mp3 of a 13B PP for ya

you are missing out on the most glorious exhuast note ever produced

take a wiff of this

http://www.geocities.com/rowdyrotary/paulrx4.wav.mp3

 

It sais the web page is not avaliable. Is it me or does this not wrok? Any ways thanks for taking the time to upload it, I want to hear it! thanks.

CJG

 

try
http://www.geocities.com/rowdyrotart...pheralport.mp3

you need to download it, copy and paste it into gozilla or similar

 

Can you email it to me?

paw@ite.com

I can't right click and save it...nor can I link straight to it...

Maybe I am just slow..(or is it.."I think the clock is slow..")

Patrick

 

You can't link directly to files with GeoCities. The only way to get a pic or sound or video off of a GeoCities site is if it's linked from a GeoCities page.

Hence... go to http://www.geocities.com/izzmus/evilengine.html and go to the bottom and click on "Drivin' around cold". That's not even a bridge port, it's a mild street port.... if the idle mixture is too rich it'll start to brap brap brap, etc. Us non-bridge types only have cool sounding engines for the 10-15 minutes it takes for it to warm up Or go to /images/ and click on gargle.wav (it's not linked from a page), that's what it was like when dead stock... (you can hear the exhaust popping too )

If you want an insane sounding engine, try to find footage of the 787B, from Sevenstock. Short, very wide spaced brap... brap... brap... and then when it revs it sounds like a 1/2" air impact gun! Peripheral port four rotor...

- PJ ('7-less since Christmas... )

 

Thanks...

Some nice sounds. I thought my FD sounded rough....(I am still not used to the sound of a rotary engine....)

Patrick

 

wanna check that e-mail addy, i sent it and it got returned the file is about 1/2 a mb

 

Don't worry about it...I already got it.

The email address is correct.

I think the server was down for a little while.

Thanks,
Patrick

 

so what you think about the sound of it then?

 

Sounds sweet.

Patrick