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/)
-   -   Half Bridge...street Car? (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/half-bridge-street-car-10099/)

93 R1 01-02-2003 07:17 AM

Well what do you think? What are the benefits of a half bridge over a big ass street port, besides the sound? :yum:



I want the car so stay mainly street but the occasional blast down the track. I know the half bridge isn't as reliable as a SP but how much worse is it? With a half bridge don't you actually keep the ports a little smaller then usual but add the bridge?



I'm just trying to decide what I want to do with my car. It won't be my daily driver any more so I can get a little wild with it now. My goal is to have it run mid-high 10's at the track but really be built for the street, which means around 500+ rwhp. I want GOOD boost response,(before 5k if possible) but want to try and avoid a Dual BB turbo if possible. Thats why I was considering a half bridge...to help with spooling a big turbo. I'll prolly end up with something like a t66 or t70 on this motor, but I'm open to suggestions.



What do you guys think?

Dragon 01-02-2003 08:59 AM

I don't know if I'd call the noise a benifit.. lol, but a good built bridge ported engine with the right apex seal will be just as reliable as a side port.. It'll just take a little more maintenance due to overlap. You'll need more frequent oil changes etc.. Bridgeports also make their power up high so you need to build the engine to spin to 10k and over if you want to use it's full potential..

jspecracer7 01-02-2003 09:12 AM

Ask Dragon...



You can have a 10 second car on STREET TIRES with a street port and boost 1.3 on a T-66(T-04R) ...

93 R1 01-02-2003 09:14 AM

1.3 BAR=ABOUT 20PSI?



Dragon,

Do you have any pics of your ports?

Dragon 01-02-2003 09:31 AM

https://www.nopistons.com/forums/pub...#>/biggrin.png The side ports are very simular to the racing beat side templates that mazdatrix's sells... The ex port is quite large...

Bad pic's, but you can see them here..



https://www.nopistons.com/forums/index.php?...81&t=6911&st=75

jspecracer7 01-02-2003 11:26 AM

I will more than likely be using the racing beat intake ports. My exhaust ports will definitley be bigger though. I will also be running water injection before going 1.3 bar since I don't trust my tuning.

Node 01-03-2003 12:24 AM

Isn't Dragon your tuning? lol, I wouldn't trust the lanky fucker either!!!! j/k

Dragon 01-03-2003 12:54 AM

Actually Van is porting his own ****... we're just supervising... He's going to put his own engine together as well.. https://www.nopistons.com/forums/pub...DIR#>/wink.png

Node 01-03-2003 02:26 AM

Get on AIM you male prostitute. And I'm reading that porting thread, great ****!

Dragon 01-03-2003 02:29 AM

lol, I've tried.. It won't let me connect.. I'm downloading my full bandwidth right now.. all 8kb a second.. lol


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