Hi

Any one think if is possible put in a 20b, 3 renesis rotors?

regards

 

Mike Whidett(sp?)'s FD drift car with the peripheral port 20B built by Kiwi-RE in New Zealand had Renesis internals.

So it's been done before, just probably need to find out the exact details. Calling Kiwi-RE might be a good start.

 

And the counterweights are the same used in RX8? renesis parts?

regards

 

What is the compression ratio for renesis rotors?

 

Im guessing you have to modify the rx8 rotors slightly cause of width?? This is just a guess since they are wider. But idk.. Id like to find out though.

 

Make sure you are using the correct bearings. The oil injector/babbot bearing races are in different locations from S4/5/6 to RX8 rotors.

 

Oh i c, well iv always been told they were wider. Maybe they refer to the seals and what not.
Im gonna look into them, since thats what id like to use for my 20b na project.

 

my 20b engine street car project have a rx8 engine rotors and work great.i have a rx8 engine rotor set for sale $150.00 each.

 

What's the modifications that i have to do on renesis rotors to fit on a 20b? oil jet modifications? what's the bearings that i have to use?
The counterwheights are the same?

Please, explain me all the things.

regards

 

No modifications necessary for the rx8 rotors to fit in the 20b.
No oil jets, only if it will be a race engine with high rpm usage.
Normal bearings will do, or race bearings if your engine will see high rpm.
Stock 20b counterweights with a balance done.
Hope that helps

 

Can I use renesis counterwheights.

 

i go to dynojet coming soon. i use 20b couterwheights,act flywheel,the machine shop balance all the engine parts and not vibration.i think to get more horsepower at low boost.

 

Here is a quote from rotary aviation. Please check this out and this might help with the rotor bearing oil grooves clearances with RX8 rotors and 2nd/3rd gen cranks, vice versa.

http://www.rotaryaviation.com/renesis_engine.htm
March 3rd 2004

 

Opening old threads with questions . Any updated info on Rx8 rotors on 20b NA ?

 

You can use them, but you're better off with the 9.7 S5 rotors. It will cost you additional money to machine the renesis rotors for full length apex seals etc. Apparently in the SAE papers from Mazda there's basically no difference in power between 9.0 and 10.1

 

^ It's doable, and completely not worth it unless you cannot source S5 rotors.

 

Thanks that’s good info , well I’m going NA street port or just stock port with just polishing ports . So not looking for power just going to be a nice fun Rx3 with a 3 Rotor NA .
only reason I wanted Rx8 is because yunk yard here sell rotary parts cheap well any import they don’t care what car is a standar price and I was going to open renessis engine up in the yunk yard buy rotors only . And just purchase transmission while I’m at it . Save money so I can machine them so will save compare to buying s5 rotors . S5 rotors get pricey for good set of 3 .

 

You do you man, if it's too spendy to drop 250/each on S5 rotors then I'd be concerned where else you're going to choose to cut corners on a 20b build.

 

250 x 3 =750 plus I need all the oil control rings etc plus I need to get them balance and clearance .
I will do me all day and once done I will continue showing that saving a dollar where it can be saved is not cutting corner on an expensive built . Is so easy for me to purchase a complete engine package but half the **** is going so why buy it complete and Try and sell all the parts cheap .

anyways once is done with the help of a few guys here and some guys I’m working with I’ll post how it all worked out on you tube and my IG and my Facebook and show how I saved a few dollars my way but did it right .

 

take the rx8 engine apart and sell the rotors and any good housings and just buy the S5 stuff.

 

And you wont need to do all that with Renesis rotors? You're building a 3 rotor broseidon. It costs money.

 

Now that’s a dam good idea . Never thought of that , I was going to buy seats off Rx8 and transmission and sell them too to make a few dollars since I get them cheap too , But this make sense ,
Thanks for knocking sense into me the Right way .