The noise from just a simple exhaust or something just doesnt cut it for me. I love the sound that the P-ported race RX-8s make in the Grand Am series, (and yes I do realize those are race-trim 20b's ... http://www.youtube.com/watch?v=jIP7P...eature=related ) but I'd like to get the closest possible to that with a stock renesis 13b. So getting to the point, which type of port would be best for daily street use, and what would I be looking at price-wise and how extensive of a modification would it be? Thanks

 

AFAIK only one or two people have tried a semi-P port on the Renesis. A traditional P-port i think is generally considered not feasible due to design differences from older 13B's. You'll find little to no information on the longevity etc of such a job either. A semi P port may run 10,000 miles or maybe 150, or even 50K.

You will find a lot of ppl ready to flame you for sounding like you want to do MAJOR, semigroundbreaking modification just cause it sounds cool, with no prior idea what your getting into. So don the flamesuit.

 

There is no easy way to accomplish what you are asking short of building a PP Race motor for that sound. It will make good power but will never ever pass emissions and your neighbors will hate you and the police will get a raise from how many tickets they write you due to how loud it will be due to the exhaust needed for a PP engine to properly breath.

As mentioned a Semi-port is available but again very expensive and will not yeild what you are looking for due to lack of overlap w/ the side exhaust ports. The semi p ports w/ are small periphal ports are used as secondaries. Semi p ports will last much longer than a bridge port will.

The closest way to get this sound is a bridge port on an older 13b. Again its not practical.

Without going into a long winded explaination its just not practical for what you are asking to do.

If you really need more info ask away.

 

Sry, i'm not a mechanic or anything, but just to clarify I realize that particular sound in the video is absolutely not practical and probably breaking several laws. I was just seeing if there was a milder port or something I could get that's quieter, but where u could still hear that idle from the port timing. Also, i dont want it all just for sound... i wouldnt mind if i gained a few more hp along the way haha

 

For your expectations, it's not worth the $$. For sound and a few more hp, go with an intake and exhaust...

 

^^ What he said. There is no way to create overlap in the 13B-MSP as you can in the older motors. Speed Source uses a 20B PP motor. Its from the 91-96 mazda cosmo.

 

well **** ... ssoooo intake and exhaust is the next best thing?

 

Depends on what your goals are

 

So let me get this straight...you want to want a perif port 20B just for the sound????!

 

No, of course not, if i had a P-port 20b that would be awesome, and it wouldnt just be for the sound, but i was just seeing if i could do some sort of smaller porting for a renesis 13b, i figured some xtra HP, even a little bit, was a given for any sort of porting, so thats why im only talking about the sound. Sry if people r gettin confused by the video, I was just using that 20b as an example of the "overlap" sound that i was aiming for, even if it was a milder version for a 13b

 

The sound you hear is overlap and lots of it. You cannot make it happen on the MSP, sorry.

 

Thanks for the info, Idk much about how these engines work so sorry if some of these questions were pretty stupid, i notice u keep saying msp though, what is that, just another way of saying 13b or something?

 

MSP is the RENESIS engine: Multi-Side Port
It says that on your engine cover

 

sure you can, but technically it won't be an MSP anymore

 

I'll have a little overlap because I had my motor bridge ported, but it wont be anywhere near as extreme, or prominent as that video. It's not a huge port job.


Going in the car in a couple weeks.

 

Oh, well i dont own an RX-8, but i was seriously thinking about buying one. I'm just using this thread for future reference, thought i'd go ahead and ask all my questions now before hand

 

That's cool, I heard it gets louder with an updated intake and exhaust, idk if u have one, but is that true?

 

any motor does...
and yes, I have an aftermarket exhaust.

 

oh, true, is that a 20b, that gold and black engine in the second picture u posted?

 

no, it's my bridge ported Renesis that's going in my car in a couple weeks.

 

Weak Sos

http://www.youtube.com/watch?v=P_OU49LO8PE

 

sorry, BPing a side exhaust Reni will likely only result in less long term durability without any worthwhile power benefit. Sounding or looking cool is no guarantee of performance.

 

hmmm, alrite, well i guess im pretty much convinced now ha, sry to change the topic up a little here, but what would make an RX-8 fast as **** while still maintaining long term durability? Turbo? Supercharger? Twin-Turbo?

 

nothing. you have to pay to play.

 

Define "fast as ****.". Define "durable."

But I am going to jump the gun and state, with much authority, LS7 crate motor.