EXE-UK

I can't seem to find any previous discussion on this particular idea, perhaps because I'm searching using my mobile.
Has anyone tried combining the side exhaust ports on the renesis with small peripheral ports on the housings? So that it is not a complete p ported exhaust, but enough to allow more flow out for boosted engines without hacking into the water jackets on the irons?

firecran

iTrader: (3)

Mazdatrix has done it.
Just go REW, don't bother with the craptastic renesis

.

Legot

iTrader: (1)

(ﾉ◕ヮ◕)ﾉ*:・ﾟ✧ Rotary Radness, Mazdatrix's 13B REW/MSP Hybrid!

AAaF

Would be interesting to see what result you could get, especially in a turbo setup, if you had some kind of valve blocking PP as close as possible to apex seal at low RPM. Would require quite some exhaust manifold though.

EXE-UK

Thanks for the link.

lastphaseofthis

oh maybe like a waste gate?



i want to run a small turbo on the side exhaust and side intake, and then run a large turbo on the peri intake and peri exhaust ports, that open later( sequential setup)like a td04 for the small and an 500r for the large.

jtizzle88

iTrader: (2)

That would be cool are you going to test it out and see?

AAaF

Kind of, but you would need to come up with something clever that enables apex to seal PP when not open - without the chance of braking apex seal. If it doesnt seal properly, I believe you will get overlap of ports, and possibly idle problems. And low end would suffer as well. I do not see how its possible to make something that is accurate enough, and still can fit between engine and wheel.

What we ideally want, is side ports until approx. 5500RPM, and PP after that. Then you would be able to get 330 flywheel HP, and still have a usable low end. Then you put a bi- turbo on it. Whoever that pulls THAT off, will most likely be headhunted by Nasa

yomomspimp06

I like this idea. I'm not however a fan of the twin turbo setup idea. why go twins when the twins when the technology is available to simplify the setup?

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RotaryMachineRx

iTrader: (1)

^ and who's got heat dissapation capabilities and the room for all that under there anyways!

RotaryMachineRx

iTrader: (1)

I know this has been tried before in the past; I remember seeing threads on this forum a few years ago about it; with no success... cant remember if it was FI or not

yomomspimp06

I didn't even think of the heat aspect of it.

there was initial success. mazdatrix did it making upwards of 600hp. they did however stop updating the general public leading me to believe it didn't last very long. there is video floating around YouTube of the car car running around a road course

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lastphaseofthis

i'm going to give you a little peak sir..


i'm doing my fc semiPP engine first, the red/gold is a stock rene. then semi pp rene.

i do the pp myself, my own unique way i havent seen anyone else do.. they're be a thead when they actually RUN... and make over 300.

yomomspimp06

I just realized you already have that hybrid together! When are you putting it in?

Brettus

iTrader: (2)

The idea is interesting but I think you would find the all the pipe area on the peri turbo side will act as a big reservoir/spongy spring .

lastphaseofthis

it's still not togather, infact i'm looking for an auto engine to make a semi p without peri exhaust as a test bed before going all in with the 13 port.

skc

I believe the Mazdatrix car was written off in a crash. Shame they did not apply the same concept on another car.

AAaF

I believe this is not correct. BMW is using up to three(!) turbos on engines with less RPM span than we have to deal with, they do not do this for fun. One thing is that you are not able to get a turbo that spools really early if you want top end. Another thing is that a larger turbo has more inertia, making more lag in the range where you are producing enough gases to get boost. One thing is power, another is transient response of the system. With a variable geometry turbo it help, I do not know how much, but these are problematic to use in gasoline engines due to exhaust temp. In our engines EGT is even higher. Variable-geometry turbocharger - Wikipedia, the free encyclopedia

TeamRX8

iTrader: (25)

There's zero advantage to doing this rather than just using a 13B and a bucket load of disadvantages

It would be easier to flush your cash down the toilet and save yourself the hassle

lastphaseofthis

reverse physiology doesn't help me get it built any sooner... but yes, the benefits will be tremendous, and it will be looked at as the goto design for all future rotarys.

yomomspimp06

ehhh it seems as if this design will promote exhaust flow while still maintaining zero overlap...In theory the heat buildup should be eleviated by the extra ports. The only true drawback is having the coolant seals so close to side ports...
What drawbacks are you referring to team?

how is the OMP setup run for an engine like this? I'm guessing this is a premix only option?

Legot

iTrader: (1)

That's a good question. Obviously it does work but how does the OMP still work with FI? In my head there's far less of a vacuum to pull oil through the injectors.

logalinipoo

Its a pump vacuum is bad for it. Thats why it has a vent line

Harlan

iTrader: (3)

Yes and no. The OMP is a pump so it doesn't care about boost pressure. The oil injectors have a vent to break vacuum on the injectors to prevent the engine from sucking down oil without the pump sending it.

logalinipoo

Thats what i said