Mazda Rotary Club

General => General Technical => Topic started by: oyvindjs on May 02, 2012, 02:51:39 PM

Title: BP, the yays, the drawbacks, the limitations and reliability
Post by: oyvindjs on May 02, 2012, 02:51:39 PM
Hey!
I have recently aqquired this little beauty, and i want to give it that real "BRAP-BRAP"- rotary sound it deserves.

(http://i21.photobucket.com/albums/b295/Grim678910/RX323/2012-04-29204348.jpg)



I know the bridgeport configuration is slightly less dailydrivable, higher mpg, tend to be "jerky" when close to idle coming off the clutch, and has low power down low, but flows lots of air, especially in N/A configuration. I want mine turboed.
Car is supposed to be a pure and simple fun car.

I have read abit here and there over the years about BPs eating seals due to the contact area between seal and sidehouse being too small and shortening the engine lifespan. Also, i have seen people having cracked the bridge from time to time. I do also recall people trying to fix some of the seal-eating by making the edges on the port less sharp?

expected lifespan on a BP is?

Please, give me the breakdown here :)

thanks
Title: BP, the yays, the drawbacks, the limitations and reliability
Post by: Indian on May 02, 2012, 07:30:35 PM
people who want BPs, want it for the novelty, not for making power nowadays. If you want a turbo motor, then a BP isnt necessary. If you want a the brap brap, my suggestion would be to go to a half bridge. youll get the desired brap brap and some decent response.

Ill tell you though from experience, the sounds becomes annoying after some time. It no longer become a nice car to drive but a noisy, miserable, gas sucking, jerky ride, with no low end power.

A nice street port with a properly match single will be more fun and reliable than any BP engine any day.

Even a stock motor with a good single can make 500hp. This is fact.
Title: BP, the yays, the drawbacks, the limitations and reliability
Post by: oyvindjs on May 02, 2012, 08:26:23 PM
Quote from: Indian;821923people who want BPs, want it for the novelty, not for making power nowadays. If you want a turbo motor, then a BP isnt necessary. If you want a the brap brap, my suggestion would be to go to a half bridge. youll get the desired brap brap and some decent response.

Ill tell you though from experience, the sounds becomes annoying after some time. It no longer become a nice car to drive but a noisy, miserable, gas sucking, jerky ride, with no low end power.

A nice street port with a properly match single will be more fun and reliable than any BP engine any day.

Even a stock motor with a good single can make 500hp. This is fact.

hehe, i know what the stock ports and streetport can do, especially with water injection :)

The car is intended to be a loud obnoxious little rascal, a fun toy and undercover straightline-racer. I can live with jerky ride, low mpg, loudness and lowend-power ;) If i want to trackrace or go in the twisties, ill gun my soon to be 400+whp seq around, if i want to cruise like a baws, ill roll my 20B cosmo :evillaugh