NoPistons -Mazda Rx7 & Rx8 Rotary Forum

NoPistons -Mazda Rx7 & Rx8 Rotary Forum (https://www.nopistons.com/)

- Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)

- - 6 Port Bridgeport Pics (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/6-port-bridgeport-pics-11951/)

Quote:

Originally Posted by DJ Rotor' date='Feb 8 2003, 06:44 PM

Most excellent!

Couple more questions: the bottom half of the port is always on - did you consider giving that part only a street port, and having the bridge port only on the auxiliarys? What effect would this have? I'd think then you'd have better low-rpm torque and fuel mileage, with the bridge available when the auxiliarys open - although obviously flow would be limited compared to the way it is now. Also what did you do with the centre housing?

Thanks!

J

My next N/A proyect is exactly that. A streetport on the regular 4 ports and a bridge on the 5&6 ports. The center plate for the white FC engine I also did a big bridgeport.

Quote:

Originally Posted by blaze08' date='Feb 8 2003, 07:57 PM

What if i did this kind of porting Judge Ito. What else would i need to do. Give me some tips, I'm all the way over here in Florida, otherwise i'd pass by you're shop and just talk all about rx7's.

ok this kinda of porting needs a free flowing exhaust to eliminate back pressure. The problem with a free flowing exhaust is the noise level. This 6 port bridgeport engine is going to have a custom exhaust. If I manage to control the noise level and allow a nice free flowing exhaust, Ill post the exhaust set up that I used. Your going to need bigger secondary injectors. The first gen. GSL-SE model have some nice 750cc injectors that pop right in to the secondary injector fuel rail. Some MSD's For the leading coil you could use the MSD 6AL and for the trailing coils you could use the MSD DIS 2. is basically one MSD box with two channels for the trailing factory coils. I have more tips. Ill post them if your going to go this route..

I'll be hearing from you then... Till then I still have that extra 6port engine in my garage. I"m not going to start to do anything with it right now though. Hopefully by next month.

Judge Ito, a little off topic, but what do you think of using na rotors with a bridgeported turbo motor..

I was thinking that the higher compression rotors would help to difuse some of the effects of the large overlap at low speeds, similar to upping the compression when fitting a piston motor with a larger camshaft, in order to maintain a minimum amount of low speed cranking pressure, and enable the motor to run without having to advance the ignition in next week and throw a ton of fuel at it to get it to idle... I realize there is less boost potential with higher cr rotors on a given grade of fuel however I am thinking this would help maintain off boost driveability as well..Maxt

Maxt, i wish i could answer you! And Judge Ito thanks for the support man, This site is very Fortunate to have you. Thanks for sharing your Knowlege with the rest. Felix Wankel would be proud of you(LOL). https://www.nopistons.com/forums/pub...1047683894.gif

Judge that looks nice https://www.nopistons.com/forums/pub...DIR#>/wink.png Did you trace? J/K Out of curiosity do you have a dyno there at your shop?

Quote:

Originally Posted by Fd3BOOST' date='Feb 9 2003, 05:44 PM

Judge that looks nice https://www.nopistons.com/forums/pub...DIR#>/wink.png Did you trace? J/K Out of curiosity do you have a dyno there at your shop?

I see you under estimate my drawing skills https://www.nopistons.com/forums/pub...#>/biggrin.png .. No trace, free hand drawing. I forgot to let you guys in a secret I draw a little too. No Dyno yet. My shop is not that big. is 30X30X30 feet. I have parking out side my shop for about 40 cars but very small inside. Soon Im going to move and I will purchase a Dyno. Ill keep everybody posted.

Judge..are you looking for a Chassis dyno or a engine dyno?