8inVegas

Does anyone know the chances of seeing a twin turbo rx-8 or a blitz supercharger stage 2 or 3???

Omicron

Good, given a year and time to see how strong the Renesis engine turns out to be.

rotarygod

I think the chances of a twin turbo setup is somewhere below slim and none on the priority list. Mazda had a nightmare with the twin turbo setups of the 3rd gen RX-7. They won't do that again. Supercharging technology is really advancing quickly too. I think a twin screw supercharger makes the most sense. They already have experience with them in the Millenia S. A single turbo is probably a viable alternative as well. I personally think a twin setup is nothing more than trouble and a waste of time. It is very complex and that alone means it is expensive. Since no one knows, my best guess is a single turbo or a positive displacement supercharger. I don't see anything else happening such as larger displacement or 3 rotors although they would be cool.

zoom44

I Think That Omi Is Talking About Aftermarket And Rg Is Talking About Factory. I Bet Money Both Are Correct.

Lock & Load

Rotarygod

Whats the potential power gain from a twin screw type supercharger at around 9psi on the renesis engine ??

What other components would one have to alter /change in order to have safe motoring ???

cheers
michael

rotarygod

Yeah I was looking at it from a factory included standpoint.

rotarygod

It's hard to predict what the engine would do since no one has shown us a finished system yet. If the supercharger is sized properly and the intercooler doesn't have alot of loss associated with it, I don't see any reason why it couldn't easily top 300 hp.

The biggest thing to deal with is the ecu. Adding fuel will also have to be addressed. Otherwise I don't see anything internally needing to be changed. Ari at Rotary Performance once ran an entire season on a Mazda remanufactured engine that had all stock seals. With 26 or so psi of boost and nitrous he dyno'd around 620 rwhp. Remember that is with all stock components on a 13B. The key is in the tuning. The engine will be fine if it is tuned good.

Nemesis8

iTrader: (3)

When I was in engineering school, we loved to break things in the Mechanics of Materials lab. What do you suppose Mazda did to test the limits of the Renesis. I read on this forum of 13-14K on the tach was achieved. Is there any publications on testing during the development? Or is this double top secrect info?

I vote for the supercharger - a fully blown 13B Renesis - now that's gonna turn some heads.

shelleys_man_06

Damn. rotarygod beat me to what I was going to say.

Lock & Load

Rotary god

"Adding fuel will also have to be addressed "

Since the fuel pump has to be replaced at 60,000km according to our maintanance book at a considerable cost $600 AUS a larger greater capacity fuel pump / regulator can be added when the car is supercharged at a slightly greater cost , so this is not a major problem .

Thanks for your imput its allways appreciated .

Shelley -man you got beaten to the draw .WHEN EVER I THINK OF TEXANS I THINK OF COWBOYS WITH SIX SHOOTERS :D

cheers
michael

rotarygod

Me and Eugene (shelley's man) are both in Houston. I'm no cowboy but there are a couple of hundred guns in my house!

I'm not really talking about fuel pump so much as I am larger or additional fuel injectors. There would be a point where a bigger pump is needed but one problem at a time.

wakeech

turbos are still a better solution for a car with a redline this high :p

shelleys_man_06

I don't have any firearms, but I do however have an SUV. :p

rotarygod, are you implying we need larger fuel injectors before a larger fuel pump?

Lock & Load

Please explain your thoughts .

cheers
michael

zoom44

no parasitic losses due to belt drive, advancements in turbos nearly eliminating lag, after certain rpm SC cant keep up and causes more power loss yadda yadda

rotarygod

I could easily spend the entire day arguing for and against both sides of that. Let's just say that there is no one right or wrong answer either way since it really depends on how each is done. To say that a turbo is etter than a supercharger though is impossible without a direct spec by spec comparison of each setup. I am a fan of both systems depending on the scenario.

rotarygod

If the fuel pump has enough flow to provide the fuel requirements of larger injectors than that is exactly what I am saying. Just changing the fuel pump without changing the injectors won't do anything. Change it when you have to.

zoom44

i was just forshadowing the response by wakeech. i think each style of FI has its place and time. it also depends on the what the enduser is looking for and it's setup. like you said- spec for spec.

Omicron

Exactly right.

I wonder how long it'll be before someone retrofits the twin turbo setup from a 3rd gen RX-7 onto the Renesis...

Omicron

Well then son, you need to do something about the former.

shelleys_man_06

ACOSTARACING put a 20B into his RX-8. Aren't 20B's twin-turbocharged to start with? I brought the idea of a 13B-REW into an RX-8 in the RX-7 Forum. I was looking for more of a 13BT, but an REW is just as nice. :D

rotarygod

Acosta's 20B was a single turbo but yes they come with twins from the factory.

The 13B-REW has the best ports in it but you can still get some damn impressive numbers from the other 13B's. I have 2 13BT blocks lying in the back of the garage collecting dust. I am planning to rebuild one and my best friend wants the other. His wife says no though but I know who makes the decisions at his house so there will probably be a spare.

shelleys_man_06

I could take the easy way out and get a JDM REW, but I want to get the most usable power from the MSP. We seriously should meet up one of these days, rotarygod.