wiktor

I need advice.

For the Renesis the turbokits out there seem to have chosen Garret produced turbos. (this can be a misunderstanding from my side)

Im looking for a turbo capable of 450 to 550 bhp for the renesis.

Is the holset HX60 a bad choice?
Which is the optimal garret one?
and what about KKK or schnitzer?

ballbearing is it worth it?

Feel free to give your personal views on the manufacturers?

Rotarygod and Rgonza im all ears.

And all others of course.

Engine rebuilding is required i know and probably change gearbox and parts of the drivetrain but i will start another thread for that later. thanks in advance.

MazdaManiac

iTrader: (3)

Any turbo choice is limited only by form factor and flow map.
Of course, some turbos are mechanically better than others, but any turbo that is an OEM choice for one car or another is probably a good bet.

chickenwafer

iTrader: (9)

I would start with a compressor map for each turbo your are considering.

Good luck getting 550-bhp from a Renesis anytime soon

mysql101

has anyone even come close to 450 whp on the renesis yet?

chickenwafer

iTrader: (9)

not to my knowledge, highest I've heard of is in the 350-rwhp range

wiktor

mazdamaniac thanks for encouraging me to stay on the forum.
I have been searching this forum for more or less three years.
i dont post very much though. Because of a certain kind of people.
I have searched and read through most of the turbo related threads. on this forum and others. Much have contributed absolutely. but i still want to discuss different manufacturers. therefore i started a thread. thanks for nothing.

i didnt say that was supposed to push out 550 hp I am looking for a turbo capable of 550 to 600 hp for my renesis. most of the times you dont choose a turbo capable of exactly the desired amount of hp you wish to have in your motor.

and please stay on topic.

MazdaManiac

iTrader: (3)

You are welcome.

I'd point out where I've posted the answers to your questions (over the past 3 years), but I don't feel like it.

wiktor

i checked some of your post for myself. I saw that its not the first time you hazzle people that asks questions or start new threads. btw next time you ask for advice about turbo stock part dealers use the yellow pages or google. wiseass

MazdaManiac

iTrader: (3)

What's a "hazzle"?
New threads are great. Old questions are not. I "hazzle" lazy people, not stupid ones. Which are you?
I answered the question in your OP. What part didn't make sense?


Now that's an idea!
Oh yeah, I forgot. I did that.
I must have missed the dozen or so other threads on this board that answered that question.
Oh yeah, I forgot. There aren't any.

BTW - Ever try that yourself? Go ahead do it. Google turbo and parts in Phoenix.
Then, try calling the hits at 9pm to see who actually has a clue.
only ONE actually carried parts.
Now, if someone want to know the same bit of info, all they have to do is search, and they come up with this post, which provides the info in a particularly concise fashion.

Rootski

iTrader: (1)

Since this is the latest active turbo thread, I'd thought I'd hijack it.

Basically, I wanted to learn more about forced induction, so I bought a book. This book details one particular installation of two larger-than-stock twin turbos on a Supra, working in parallel (not sequential like an RX7's). Each turbo is fed by three cylinders. The problem with the setup is that three cylinders totaling 90 cubic inches can't make enough exhaust throughput to spool the large turbos quickly enough.

My question is this: is it advantageous, or even feasible, to use either a parallel or sequential twin turbo setup on an RX-8? It seems to me that with small enough turbos, each rotor could be turboed individually, though I don't quite know how that would be any better than one larger turbo. Sequential turbos seem to make more sense to me, as many people here who want FI want some down-low punch while retaining the high-revving Renesis nature while minimizing lag, and sequential twins seems to me to be a path to satisfying this tall order. What do you think? For starters, is there even room under the hood for it?

MazdaManiac

iTrader: (3)

Most of the advantages of sequential turbos have been negated by modern advances in turbo design.
Today's turbos have a far wider efficiency range and spool much faster than those available just 10 years ago.
Just look at all of the single turbo conversions on 300Z and RX-7 cars.
More power, better drivability and less complexity.
Using parallel turbos is only advantageous on a car with monster displacement.
Even then, it is only useful because of packaging constraints (or bling quotient).

unreal89

Is the holset HX60 a bad choice? Why would you even consider a truck turbo? They aren't cheaper unless used and their exhaust housings are huge from what I've read.

Which is the optimal garret one? The GT35R has been said to be a good match for the renesis (you would have come across this multiple times if you had searched), I believe Rgonza made 350whp on the renesis with one a while back.

and what about KKK or schnitzer? Again, not much point in using these companies because they aren't any cheaper.

ballbearing is it worth it? If running big turbos, yes. Plus this project you're considering will cost multiple thousands of dollars, why not spend the extra $500 on a better bearing type.

Feel free to give your personal views on the manufacturers? How is this a question?

Other thoughts:
You will need extreme fuel upgrades, consider converting to a return fuel system like GTAW did ( www.turborenesis.com ), or the mazsport fuel pump upgrade.

Also, the reason people are being rude to you is that your "goal" is not even reasonable and if you have searched you would realize that no one has ever broken the 400whp mark. 300whp is more reasonable, but much easier (theoretically, since I have yet to see it done) to get a used greddy kit and buy a Garret gt2871r and use that to reach 300whp.

MazdaManiac

iTrader: (3)

Thanks for having more patience then me, Unreal.

swoope

iTrader: (5)

on topic.. **** of doushe..

beers

wiktor

excuse me im from europe where the history comes from. and my english is not so good but we can take it in swedish if your swedish is better

thanks unreal at least giving my some thoughts i appreciate it.
in sweden the truckturbos comes cheaper. So ill spend some money to get a ballbearing one.

the question mark was misplaced i was just trying to get a conversation started about different manufacturers and what their individual strengths and weaknesses are.

my intended goal is not 550-600 hp. I dont think 400 - 500 hp on renesis is impossible to reach though. To produce a bolt on turbokit for the masses in this range is harder i believe. And i dont think the Greddy design is the way to go.

unreal89

Just out of curiosity, are you seriously considering this project or is this a "what if" type of situation? In my opinion, the goals you are trying to reach may be possible, but the last thing you should be worried about is the turbo. The Rx-8 fuel system, ignition system, ECU control, and high compression rotors should be what you need to focus on. You can't just buy a huge turbo and slap it on and expect 400-500 hp. Plus with the newly discovered OMP issue, running even higher PSI would be even more problematic. The Renesis engine is still being figured out because it is so different from earlier 13B models, while you are jumping straight into putting on a big turbo and running it.
I recommend you read many of the custom turbo installs, theres MazdaManiac's turbo install, rgonza's, rotorocks, truemagellen, GTAW, and rotorock's.

MazdaManiac

iTrader: (3)

Vi kan tala i svenskt, om du föredrar. Men, det er bedre for mig a til snakke i Dansk.

At blive praktisk , bare Mitsubishi og Garrett er værd talende omkring. Mest af alt den installationen bruge eller den anden.

chickenwafer

iTrader: (9)

the color of your beautiful eyes, Jeff.

wiktor

I have been thinking seriously about this for 1and half year. and also considering a older veriosn 13b swap or even 20b swap.
I got some good fabrication contacts now that i didnt have 1 year ago so things have changed a little.

I have taken out my engine one time before and im taking the engine out again and ill go along from there. the enginge will be rebuilt. the fuelside is going to be upgraded.

why i asked about the turbo is to see what size i should be taking into account when im building the headers. And i got a good deal on a holset turbos so i added that in my thread. I want to fit the turbo with some space to give and take if the turbo wont work as fine i can swap it out for a smaller one. im not aiming for 500hp+

thanks again

wiktor

Danska hur kommer detta sig?

unreal89

You do realize the renesis has 10:1 compression rotors right? you will need to be pushing some serious psi to get to 500hp, which means that your fuel will need to be basically race gas. How often do you see a 10:1 compression car run 15 PSI or more?

wiktor

im not aiming for 500 hp. but we do have 99 ron v-power pumpgas in sweden which is running the renesis very good. its not racefuel but its good.

unreal89

sorry, i misread you saying you are "NOT" aiming for 500hp

MazdaManiac

iTrader: (3)

Uh. OK ?
They're blue, anyway...

99 RON fuel is equivalent to the 93 octane (RON/MON) available on the east coast of the US.
Its nothing special, though I'd kill for it these days since we only get 91 here (96 there in Sweden).


Därför att jag är danska. Min svenskt är inte gott.

SlideWayz

Another bit of turbo advice: if you going after big power, plan on blowing and rebuilding your engine.