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-   Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)
-   -   Bridge Porting ?'s (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/bridge-porting-s-46577/)

j200pruf 03-27-2005 03:48 PM

OK Here is the deal. I have some spare 6 port housings that I want to bridge port. I am wondering should I port the original port up or make the eyebrow larger?



I will try and make a pic of what I am talking about.

CletusFD3S 03-28-2005 09:52 AM

talk to G MON he knows his ****.

j200pruf 03-31-2005 12:47 PM

GMON, MS7, ITO, BDC, none of you guys can take a second to explain this :(

BDC 03-31-2005 06:20 PM

[quote name='j200pruf' date='Mar 31 2005, 10:46 AM']GMON, MS7, ITO, BDC, none of you guys can take a second to explain this :(

[snapback]693421[/snapback]

[/quote]



I'm not sure I fully understand the question. What exactly are you getting at? What's your goals?



B

Judge Ito 03-31-2005 07:49 PM

I'm building a new 6 port bridgeport engine. I don't know when I'll be finished but I'll take pics this time around. go ahead with your question..

Judge Ito 03-31-2005 07:51 PM

[quote name='j200pruf' date='Mar 27 2005, 09:48 PM']OK Here is the deal. I have some spare 6 port housings that I want to bridge port. I am wondering should I port the original port up or make the eyebrow larger?



I will try and make a pic of what I am talking about.

[snapback]691554[/snapback]

[/quote]which port are you asking to go up on? the primaries or secondaries??

j200pruf 03-31-2005 08:55 PM

This is mostly concearning the secondary and aux ports. OK here goes with (hopefully) better writing.



I was wondering if I should port the regular part of the port up more, or port the eyebrow down? I am shooting for about 5mm thick bridge between the ports and the eyebrow, with the eyebrow part of the port about 1-1.5mm from the coolant oring groove.

j200pruf 03-31-2005 09:31 PM

And I am going to run a thicker bridge on the primary ports with the little piece of the apex seal on that side. On that could I go with a 4mm or smaller bridge on the secondary/aux ports with out sacraficing reliability?

j200pruf 04-06-2005 08:22 PM

One one, I will try a pic to get my point accross.

mazdaspeed7 04-06-2005 09:23 PM

On my half bridge 6 port, I left the stock opening side almost untouched, and made the eyebrow have more area. I had to turn the apex seals around so that the corner pieces were towards the center iron to do this though. I could hear the corner pieces clicking as I turned the engine by hand before I turned around the seals, and didnt want to risk it. I dont know if opening the main port sooner and making the bridge narrower would have changed that, as I havent done it. But, thinking about it, I could see how having the bridge closer to the tip of the apex seal would prevent that.


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