*sigh* it's starting to look like streetport is the way to go, I will however ask lots of questions about it at the shop in march and make my final decision then... however even without the bridge port, if you scalloped the other side of the rotor and did a fair size street port and cleaned up the exhaust well enough, would you not get enough overlap to achieve this effect?

 

Are you aware of the fact that Mazda spent a lot of money and time to create a 0 overlap engine to increase performance?
A little porting works fine but you'll never achieve what you're looking for.

 

I would be very concerned with side seal failure on a bridgeport. The exhaust ports put a lot off stress on them already...

With all the increased port volume of both the intake and exhaust on the Renesis when compared to older rotaries... There is just no comparison.

http://www.rotarydevelopment.net/Rot...790_Rotary.pdf


Not really trying to dissuade you, but it just seems silly to do all that just for some noise.

 

Your trying to reinvent the wheel. A street port is good, however you are limited on how much you can do on the renesis. The rotors are already scalloped from the factory, and the more you do this the more you will lower the CR.

You need to find a good engine builder in your area and work w/ them on your goals. Just posting random ideas will not get you very far.

 

I don't think you will get the "noise" you are looking for.
I am including a (amateur) sound clip I took with my phone when I got home, car is warmed up, properly tuned. I only sampled the idle, cause my leg isn't long enough to reach the pedal from the back of the car. Keep in mind it did make my car a bit louder.
click on the pic.


A guy named Joe in Toronto ported my msp. He also nitrided? and installed NRS apex seals.
I'm getting a newer 8 very soon though. I will probably get it done again.

 

I'd like that cool Crip walk thingy I've seen, it seems very stylish.

How can I get someone to shoot me in the leg? I am not concerned with bleeding out or any long term damage since I don't walk very far, I just want that cool cool Crip walk....

 

Kane, I can help you...and when your leg is dead, I'll replace your leg with a reman, and we can do it over, and over, and over, until you run out of money, then you join the bloods.

 

^^^ Good one....

 

...O_O crip walks? not fun.. :P either way, I'm going to the shop during my march break to start figuring this out, I assume the shop your talking about is RPM Fine Auto in Pickering?

 

RPM. Look into any other mods you would like done while everything is out and apart to save some dollars.

 

seals for sure... if youve dealt with them before whatelse can you suggest

 

It's a preference thing. I'd get it done in Detroit next time because it's local for me. When I do it again on my new car I will install ceramic seals again + a sohn adapter with nicely run braided lines and paint the block while it's out. I'd install a race header when reinstalling the msp.

Just try to avoid those "I shoulda" moments. Try to save money spending money, you know?

 

:P thats the point of asking all this first!

 

I thought you wanted the loud brap brap to wake the neighbours.

btw, if your car looks stock it'll just sound broken.

 

Hmmm are you guys talking about me? I'm Joe Ferguson, I used to run RPM Motorsports in Kitchener.
I'm a full time Porsche/BMW mechanic now but I still have a small shop on the side where I build/port Rotaries.

I'm going to be working with Dave Pratt from Modified Mag on a Renny build for his RX-8, he's documenting it and will be a tech article in the mag for a few issues.

I also have full bridge ported a race engine for a customer out in Halifax using RX-8 rotors, I had to design and develop my own RX-8 bridge porting template because no one else does it.

 

there is your answer for a bridgeported rx8.

 

Hey Chad, did I work on your car before? I cant remember lol.

 

Hahaha I'm still pretty reasonable, my shop is small and I do this sort of stuff only in my spare time. Most everything I'm doing at my shop is project stuff, so the owners dont mind it taking a while to get their engines or cars finished.

Here is a build thread about the race engine bridge ported and using Renny rotors

http://www.rx7club.com/showthread.ph...ht=bridge+port

Here is a video of it running:

http://www.youtube.com/watch?v=IMev7...layer_embedded


Other pics of porting:
http://www.rx7club.com/showthread.ph...ht=bridge+port

 

The internetz are slow and I think I deleted a post instead of editing.
That car sounds mean. The build looks great/
I will have to contact you when I'm ready to put a 13b in my Austin 1100. I really like the weber's used. That'll be in a year or two.
I've submitted as much as I can in this thread. I'm out.
I'll hit you up someday on the 7club Joe, I have the same name there.

 

How long have you had the bridge ported running? What sort of power did you make with it? Did you keep it NA? I'm pretty curious what sort of power the MSP can make NA with a bridgeport. I haven't seen any dynos yet.

 

He said bridgeported race engine running rx8 rotors, not a 13b msp with a bridgeport...

 

well if I can't get it to run reliably then a streetport makes more sense, but yeah the noise would be a bonus...

 

Yeah sorry, the bridge ported engine I built used FC turbo 4 port irons and peripheral exhaust ports.
The internals were Renny parts.

But because of the location of the Renny sideseals, a normal bridge port template wont work, so I had to make my own.

Brandonien - pickup a cheap used Renny engine, I've seen a few running engines for less then $1000. Lets tear it apart and bridge it. I have the porting template for it.

 

:P I'll get the streetport and seals done first then I will get my hands on an extra engine! (*so I'll take you up on that offer in say a year, being realistic*) It's something I will definitly be trying to pull off at some point, although the next engine I want is that damn 16x when she comes out... and I'm saving for it already... hehehe I WANT

 

There's a couple shops that bridge port them... There's just not a lot of demand because it's unproven just how beneficial it is... if at all.


Maybe I'll have my motor together soon, and I can do some dyno testing.