Hey! I've been pondering this question for awhile now. Being around my family an friends who've built everything from nova's to trans am's to mustang's. An i know alittle bit about building. how a built piston engine generaly consists of being bored out, stroked, camed, bigger intake an throttle body etc... what do you do to rotory engines? I've heard of porting an thats about all i know about. What els is there? Just wanting to build my knowledge

 

you just need to know how rotary engine works, then u will know what you can/can't do to the engine.

 

Porting.


And that's pretty much it.


You can change the internal measurements of a piston engine easily. If you make even a slight adjustment to the rotor or housing or side plate, you HAVE to adjust the other 3. And by "adjust" I mean completely redesign and build from scratch at enormous expense.

There are some other options out there, such as enlarging coolant or oil passages, treating the internal engine surfaces, but porting work on the intake / exhaust is the limit of what you can do in terms of making power. And it's not a simple matter at all. The engine is very sensitive to minor changes, and it is very easy to disrupt airflow more than improve it.

 

haha I know how a rotory engine works ... suck squeez bang blow... haha jk but yea i get the jist of the rotory. An that makes me sad knowing that i will be only able to do porting, an yea it being a sensative engine is what I've also read. I really wanna go over 500 rwhp, might not be anytime real soon cuz of budgets but thats my MAIN goal.

 

lower compression ratio Doritos have been brought up Mind you, that is for boosted applications.
Not sure if that's what the OP had in mind though...

 

Ok so your lango went wayyy over a teenage mind hahaha if your asking am i planing on boosting. Then the answer is a yes haha.

 

If you do indeed get to 500rwhp, you would be breaking new ground that has never been touched by a Renesis (of if it has, it hasn't been announced). And you will probably be easily into the $50k+ range of trial and error, development, replacement engines, etc... That's probably too low of a guess. $100k+ is more likely. ($10k engine builds add up fast when they don't last long due to the abuse you are shoving at them)

The simple fact governing this is that our side exhaust ports have almost no expansion room, creating a restriction to exhaust flow capping the amount of exhaust the engine can expel, etc...

Mazdamaniac got into the low 400s and has gone through ...9? engines so far.


The RX-7 engines are proven capable of hitting that mark, or higher, because their peripheral ports are easily expanded. Increasing the rotor count to 3 or 4 and you can get their for far cheaper. Turbo'ed 13b REW from an FD will run you $12-$15k for the swap. Turbo 20b will run you $20-$30k for the swap.

And then there is the slew of piston engines you can pour your wallet and soul into trying to get to work. Apparently 2jz swaps are common in Pakistan (? I think I have the right country).



Edit:
Adding "haha" every half sentence in your post makes you sound like an immature kid. If this description is accurate, be prepared to have the thread bombed because you are just another guy trying to strike a match in a hurricane. If it isn't accurate, try for articulation, grammar, punctuation, and proper phrasing and you might not get flamed...as much.

 

"500rwhp..."
"Ok so your lango went wayyy over a teenage mind hahaha..."

yeah, no longer taking serious. Unsubscribing...

 

But if the esmeril turbo gets 414rwhp... couldnt you but a 70mm turbo on it an get more power? ahhah an yea I know I am seeming far fetched...

 

You clearly don't know jack about what you are dealing with.

Start with lots and lots and lots of research and reading about things like compressor flow charts, turbo heat generation, combustion flame fronts, rotary combustion dynamics, side seal temperature control, inequal thermal efficiency zones, etc... But that's even assuming that you know about things like octane and what it actually does, detonation sources, plug temperature ranges, charge cooling, apex seal stress, etc... And I don't think you even know that.

No, it is not a matter of just "putting on a bigger turbo"




Are you aware that the rotary doesn't have pistons? Maybe you should just start with the basics.

 

ok, now unsubscribing

 

ha yes i am aware of that but I know now that I need to do more homework.

 

An I do know about engine limits , none on the rotory tho.. what's a good place where I can find this stuff honnestly I wanna know about these cars.

 

look here

 

I've searched stuff on the fourm an came up with nothing, besides that a 20b engine is jesus, an 13b out of a rx8 are very unreliable an are torque less engines. Never have found numbers where too much power is too much power.

 

The only way to obtain an increase in power is through Forced Induction. So far the reliable/driveable limitations on boost (for the Renesis) are 14psi +/-. That will net you 300 rwhp +/-.
Now if you do not understand why that is a limitation. Then I suggest you read a lot more about the Renesis and boost on this forum.

 

I did see people saying they were pushing over 20 , but don't you need better apex seals to do better boost plus bigger injectors an fuel system.

 

i still think my first post already answered his question ...

 

I found a thread that told me about some of the materials, but I mostly knew alot of that already. I knew about running lean an octane, an the difference between 93 an 87 an 100 octane etc.. but flame fronts and flame speeds and all of that is mostly done in tuning.. am I right? an i dont plan on tuning myself, I plan on leaving that to the pros tho, so I have a car that will run still.

 

Yea it actually kinda did! I guess I've found out that theres more then meets the eye with these engines.

 

over 20 lbs on stock renesis and stock seals? Hmm ok.

 

I forgot to add that too, that's my fault.

 

children have no business playing on the internet

https://www.rx8club.com/rx-8-racing-25/05-rx8-vs-06-v6-mustang-225112/

 

*Sigh*

we will see more and more retarded kids soon ... rx-8 is almost 10 years old ... yea we'll see more retards ... repeat ...