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/)
-   -   NA Bridge port/ Peripheral port Dyno sheet (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/na-bridge-port-peripheral-port-dyno-sheet-71343/)

Hyper4mance2k 12-26-2008 09:34 PM

So after much discussion on this and other forums a few of us have come to a conclusion. None of us have ever seen a dyno sheet of a bridgeport or for that matter a peripheral port 12a or 13b that is not turbo'd. If anyone has sheets if you could post and a slight description of your setup that would be greatly appreciated. I am planning on building an engine soon, and i'm trying to gather ideas and information on what powerband I want because it is for my full time auto cross car.

fc3sboy1 12-26-2008 10:14 PM

mazdatrix has numbers posted

Hyper4mance2k 12-26-2008 10:33 PM

We've all seen the numbers. I'm looking for actual dyno sheets.

mazdaspeed7 12-27-2008 11:56 AM

Not much looking apparently, the newest thread in the *gasp* dyno forum here is a n/a 13b pp. Heres the link for the lazy



And another from the same place...

Hyper4mance2k 12-28-2008 03:06 PM

cool I found those 2 peryports, but there are still no bridgeport results anywhere.

j9fd3s 12-28-2008 07:06 PM


Originally Posted by Hyper4mance2k' post='913829' date='Dec 28 2008, 01:06 PM
cool I found those 2 peryports, but there are still no bridgeport results anywhere.



i saw one dyno in person, the dyno sheet looked like a piece of paper with lines on it.... it did 231rwhp@9600 which is all the rpm the dyno will go.



it was an old school 13B, bridge was into the water jacket, but with as mild a timing you can get (3 finger...), think of a high lift shirt duration cam. 9.7 rotors, aluminum flywheel. he used an RB holley manifold with i think a 750 carb on there. exhaust was RB road race header, to 2 really long (40") 2.5" glasspacks into 2 dynomax mufflers.



he spent some time on the carb, so it was very driveable, and with the gsl-se trans highway mileage was in the mid 20's.



it was in an rx3, if it matters

Judge Ito 01-15-2009 07:34 AM

I will be visiting the dyno soon. i'll try to video some footage and have some better results then last time.. Im changing my fuel over to methanol, so i need to re-map my haltech..

xboxthug13b 02-11-2009 08:53 PM


Originally Posted by Judge Ito' post='914613' date='Jan 15 2009, 08:34 AM
I will be visiting the dyno soon. i'll try to video some footage and have some better results then last time.. Im changing my fuel over to methanol, so i need to re-map my haltech..



u used to use race fuel?

Nateb123 02-11-2009 11:37 PM

I'd head over to bcrotary.com. There's a few guys with PPorts (12As I believe) and plenty of bridges too. I remember a few dyno sheets getting posted too.


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