NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)
-   -   Square Exaust Ports??? (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/square-exaust-ports-10415/)

j9fd3s 01-11-2003 06:11 PM

hey i was about to post that pic!



mike

SPEED_NYC 01-11-2003 06:44 PM


Originally Posted by JBurer' date='Jan 11 2003, 02:53 PM
Hey, I recognize that motor!

I thought you were joking about the square exhaust ports. Have you called CLR to see what he thinks about it?

Best,

John

nope, no joke john. nah i didn't bother calling carlos, **** CLR.

the motor is running strong as hell, i'm awaiting some repairs and i'll try to get the car on the dyno to see what square ports can do https://www.nopistons.com/forums/pub...IR#>/smile.png

SPEED_NYC 01-11-2003 06:45 PM


Originally Posted by Grizzly' date='Jan 11 2003, 02:58 PM
Rice Racing's Exhaust is'nt far off the same size.

i knew rice had huge ports, but i never realized they were square also. i think peter has removed the sleves though

93 R1 01-12-2003 04:07 PM


Originally Posted by SPEED_NYC' date='Jan 11 2003, 07:45 PM
i knew rice had huge ports, but i never realized they were square also. i think peter has removed the sleves though

Yeah he took the sleeves completely out

Dragon 01-13-2003 12:08 PM

When the port opens all at once like that it creates a sharp hard pulse that will spool a larger turbo with a big ex housing faster.. and make a very loud exaust note.. https://www.nopistons.com/forums/pub...#>/biggrin.png I'd leave the bottom of the port and maybe round out the top a little, maybe bring it up 2mm in the middle and round it to the corners so the apex seal doesn't hit a flat edge when it closes.. Other than that it should work..

Grizzly 01-13-2003 12:19 PM

I am not sure where i found this pic but its a nice shape and size port.

Dragon 01-13-2003 12:49 PM

That looks like a nice 425 ish hp engine lasts a long time port there.. lot's of apex seal ride area, not really much wider than the stock port, but up a few mm's and down a few..

Grizzly 01-13-2003 06:20 PM

I supose the Bhp depends on the Bridge and T51 bolted to it realy? LOL

fdracer 01-13-2003 06:48 PM

what i wanna know is why they ported it so much at the bottom? the sleeve's still there so it doesn't help w/ total exhaust flow. all they did was shorten the power stroke and they didn't even gain any flow out of it.

SPEED_NYC 01-13-2003 07:02 PM

dragon, grizley and fdracer, which port are you guys referring to? mine or that last one?


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