Wondering if anyone have any pics off a rx8 housing?

Ore know if i can make PP engine and exhous port in to it ?

Alex

 

no you cant the exhuat and the intake are on the irons on the rensis motor...so I imagine that were the exhuat port would be you would just have the waterjacket

 

I am hoping that it isent becose it my bee the same housing that normal 13b housing. But i am traying to find it out so maby somone in here know anyting and want to sher it whid me ? U can PM me if u know anyting abote this please.

Thanx Alex

 

Technically, you could make PP housing out of RX-8 housings, but it would require twice the work as doing it with older 13B housings, which already have a peripheral exhaust port. Just go for the older 13B housings, or buy manufacturer PP housings.

 

I wonder what the effect of P-port intake ports with ported stock RX-8 side-exit exaust ports would be like... hmm

 

Nice idea White87. I am also curiuos. The way I see it, the P-port exuast has to be better (when talking flow). I would like to know if the side ports of the 8 motor continue to dump till the rotor reaches TDC. I KNOW a p-port does. Even staying open past TDC for good overlap. I, personally, don't think the side exuast ports can keep up with the P-port.

 

Yes but whats the funn in that to cut 2x ports in to its dont take long time.


Alex

 

^ If you have to ask this question there is no way in hell you could make/build a PP engine, sorry but it's the truth.

 

The fun in it is actually having an engine that works. Go ahead any try to create functional PP housings on your own and not have it be time consuming. You do not know what you are talking about.

 

Never say never my friend.

 

Don't forget the Rx8 housings have the coolant seal passages unlike the 2nd and 3rd gens.

 

In that case, you could use GSL-SE housings and PP those... if you had the means to make your own housings....

 

this is kind of a crappy pic, but it was the only one i could find.

you see the rotor housings? it almost looks like they WANT you to cut a pp in there!!

 

Here's a better pic.




More pics at www.rotaryengineillustrated.com

 

Thanx T-von. Can u take a pic when the housing is leangin down so i see the waterjacket?

Looks like its oki to cut a exhouse port in it And thats its good.

BTW Tvon I am not using normal side plates. I am using aluminium side plates from racing beat. I am not sure if i can get them whid no seals cut in them but i dont understand way i cant get that in it and us rx8 rotor housing. So i can cut the exhous like what i want.

Alex

 

How do u know me ????? what i know ore dont. Stop beeing a idiot becose somone is asking a cuestion. Isent this forum to help and not geting trowed **** in the face???

My wurst thing is that i dont know how type all the words in english Becose i am living in Norway. I am traying my best to get my self understand but its not always that easy on when it comes to technical terms.

 

If you get RB 1st gen 12A/13B side plates, they'll fit with the Renesis rotor housings I think...

 

I understand and respect your ability to communicate with us. I am learning Dutch right now and it is very difficult, but everyone knows that English is the most difficult second language. In all honesty, you can type better in English than a lot of Americans can, so for that you have my utmost respect. I am really not trying to flame you for this, but here is the deal:

I DO know what you know and do not know regarding this subject, because if you already knew the extent of work in cutting functional peripheral ports in motors, then you wouldnt be asking about this topic. While the RX-8 housings look like they would be very easily cut for peripheral exhaust ports, I just really do not see the point when you can get housings out of any other 13B that already have a peripheral exhaust port.

The real judge of the work required is the intake port, because you will have to do it no matter what housings you go with (unless you buy manufacturer PP housings). Since the RX-8 appears to have water crossing over into the lower intake manifold (just like turbo housings), you could start with Turbo housings and have half of the work done for you already. That might not be as "fun", but your engine will be completed with a lot less time, money, and effort. Unless you are trying to do a semi-pp intake AND exhaust motor, which would have incredibly complex manifolds, I see no good reason not to stick with housings already made with a peripheral exhaust. My intention is not to insult your intelligence, I am only trying to help you out. If you want something to tinker around with, get the RX-8 housings. Rationality would tell me to buy turbo housings and save myself some grief.

 

other than the oil injector locations (which wouldn't matter if you were premixing), what would be the benefit of using the rx8 housings? i thought the racing beat aluminum housings had the coolant seal grooves in them? am i wrong on this?

 

Racing Beat aluminum housings you can get them either way. But I think the point everyone is missing is that he wants to make the periferal exhaust so that he can make it to the specs he wants. Which to me would make sense since the stock exhaust ports are inefficient. If you have seen MFR PP housings you will notice that the exhaust is different than the stockers.

 

Ever heard of porting? I'm not saying he should use the stock port shape, things are just a lot easier when you dont have to bother with the following things:

-cutting the ports perfectly through the entire housing
-perfectly fitting a tube that will connect to your exhaust
-perfectly sealing that tube so you will have no coolant or exhaust leaks
-designing a custom manifold to connect to the tubes

Instead of only:
-Using a die grinder to change your existing port shape

Is that really worth it over porting the crap out of existing ports, and being able to use an aftermaket header? As stated before, any rational person would say "no".

 

As long as he knows how to determine port timing on the housing and knows what timing he wants to run, I don't see the big deal with him making his own ports. Machining them in isn't rocket science and what happens through the water jacket would happen with a 13B housing too. I don't see the problem. If a stock 13B housing can be modified to give him what he wants then I would be more inclined to use them. I wouldn't pay for a stock mfr p-port housing though. What if he wants different port timing than the existing ones can give him such as a port that doesn't close as late as stock? He'd have to make that. Whether or not this is practical isn't really anyone's concern but his. That's usually a big problem on this forum. When someone wants to do something that could possibly be done cheaper and easier, they assume everyone should also follow this course and do it the same way or they'll get flamed for it. That's closed minded. The most important thing is to get it done how you want it done. Having others agree with your decision is irrelevant.

Cutting a peripheral port into a housing is no big deal for a machine shop. Having a sleeve turned out of aluminum and threaded into the housing is also not that difficult to get done. Even welding aluminum can be done as long as the welder knows what he is doing. Basically as long as you know what you want done and where you want it, it isn't that hard to get someone else with the resources to do it. You just have to pay for it. I'd give this guy more credit and don't claim you know what he does. That's doubtful. People don't know what I know or how I think things should be done. Is this practical? Probably not. Can it be done? Absolutely. I hope he tries it. I have more respect for the person that takes a risk and tries something different than I do for the person who just does everything the traditional easy way. It's these few who usually make all the advancements. Progress and advancements aren't always rational.

 

I never really reccomended MFR PP housings, as I understand they are very expensive. I also understand that it is only his business, but when you post a thread looking for opinions, you are bound to get them. Sure, it might not be too terribly expensive to get the PP ones machined, but by using the RX-8 housings, you are still paying double what you normally would, because they have to set up the machine in two different ways, and also use two different materials between the intake and exhaust port sleeves. It should come across as a no brainer that using 13B housings would be easier, but if this guy has a lot of extra money to spend, the RX-8 housings can obviously be used. The only thing I really dont get is the fixation over the housings... there is nothing better about them. Even if he already has a motor sitting in his garage, he isnt even planning on using most of it. It just seems like a much more cost effective plan to use 13B housings, and then partake of some of the other renesis parts like the rotors and stat. gears. I may be close minded about it, but I dont see anything wrong with being that way. The way I am reccomending will save money and be just as good, if not better.

As far as me not knowing what he does or does not know... if he knew all about peripheral porting, this thread would not have been posted. Instead he would have immediately called or visited a machine shop.

My final thoughts: If you really MUST have renesis housings, then go for it. Just know that it will end up costing you a lot more in the end, which is no big deal if you have cash to burn, I guess. I apologize for being the stereotypical frugal FC owner.

 

I just wanted to clarify one thing, since you mentioned the aluminum side housings. You never mentioned anything about a semi-pp, and if you were planning on doing that, I would be all for your idea. What I have gathered from these posts is that... you want to take a renesis motor which has all side ports and no peripheral ports, get rid of all of the side ports that are there, and add the peripheral ports that arent there... Is this what you want to do?

 

Yes I actually do know quite a bit about porting rotarys been at for for quite some time now. But enough of that if you have ever seen MFR PPort housings next to stock housing you would understand what I'm talking about in the difference of the 2 exhaust ports.