Brettus

iTrader: (2)

Ok - it's a fair bit better than the Greddy, but not 'better' enough
My guess is it would flow about the same as the 3071 and my turbo (To4e 57trim) which are both maxed out at 320whp.

TeamRX8

iTrader: (25)

you may not be able to put one on directly, but a tight radius elbow and then maybe a Tial MV-R or downsize to a -S

you have other alternatives besides the plain-jane 3071/3076 vanilla versions too ...

though you might consider that going bigger may offer less than expected results as the Greddy manifold starts becoming the limiting factor; the general routing and transition to the turbine is about as poopy of a design as it gets


.

Turblown

A 57 trim To4E compressor does not max out at 320rwhp on a rotary. That is an easy 400rwhp turbo mated to a P trim wheel. I've done it several times....

pdxhak

iTrader: (2)

On a Renesis?

Brettus

iTrader: (2)

cough - you sure about that ? I've see guys on the 7 forum up around the 320-330 with a 57 trim but that seems to be about it .Would love to see those dynos ....

Turblown

How about a video..


@ 16psi this same car made 406rwhp. Stock ports even...

Turbo for turbo the 6 port renesis makes even more peak HP over an older 4 port 13B...

Yes I know its also a 60 trim.. Don't have any videos of 57 trims...

Brettus

iTrader: (2)

Hmmm - very interesting . MM tries to tell me my 320 is BS and you come along and say 400 is possible .


Interesting discussion about it here :

http://www.rx7club.com/showthread.ph...highlight=To4e

Turblown

I posted in that thread about 3 years ago..

Most of those guys are using restrictive log manifolds, used rotors and housings in their engines, and not very good engine tunes...

I did a back to back from a cast manifold and 2.5" downpipe to one of our tubular units, and 3.5" exhaust and it was worth 30 ft lbs of torque throughout the entire powerband..

I am assuming you are using restrictive greddy manifold, and tiny greddy t2 turbine housing. Probably not going to hit 400rwhp with that, but I would think 320rwhp wouldn't be that hard to do...

Brettus

iTrader: (2)

You seem to be re-writing the rules on what was thought to be the approx. whp per lb of air as expressed by others on the 7 forum .

What would you put the number at as optimal , with all the right componentry ?

Turblown

Max is probably around 440rwhp with methanol injection, and a big ignition system @ 20+psi. I did that twice but never did dyno. The car did beat up a few cars at the dragstrip indicating those power levels.

I remember when the forum guys told me I wouldn't hit 450rwhp on a V1 compressor wheel and I did............... with a Carb

I am not rewriting anything, there are plenty of guys making more than the forum averages who don't go on the internet..

999miki

Is Renesis overall more efficient on airflow basis than 13B? Or is it just better BSFC in top end? Assuming that good build 13B produces over 8.5 crank HP from each pound of air, how would Renesis stand against it?

Hope its not some secret sauce

TeamRX8

iTrader: (25)

this is not a general turbo rotary discussion, never miss a chance do you?

Brettus

iTrader: (2)

Hard to tell who you are addressing here - but your comment is at least true to form and equally as useful as 99% of your posts .

TeamRX8

iTrader: (25)

Were you boasting about your accomplishments with other style rotary engines in other vehicles using other turbo setups in a RX8 Greddy turbo upgrade thread?

it wasn't addressed to you, otherwise the same applies so please feel free to put it where the sun doesn't shine down under

edit: after reviewing thread it actually applies more to you

9krpmrx8

iTrader: (46)

Well when I get my turbo back I will slap it on the dyno along with a stock RX-8 and see what she does maybe I should ship my car to Europe, I hear those dyno's give great numbers

ELI063

^ haha

kma5783

iTrader: (7)

Really? The 3071R top out at 320whp, not what I would expect to see.

I was thinking the same thing for the wastegate.

What other options might you recommend?

I agree that the manifold design is definitely a limiting factor, I have the Esmeril Kit but chose not to use it because I think a low mount is a better option. I was thinking of doing a completely custom setup but then found an amazing deal on a greddy kit. Now you're making me think of pursuing at least a custom manifold.

Same Question, has it been done a renesis?


Now let's keep this thread on topic of a Greddy Turbo upgrade not a general turbo discussion.

9krpmrx8

iTrader: (46)

It's such a tight fit, is a tubular Greddy manifold replacement even possible?

Brettus

iTrader: (2)

Well , in light of what Turblown has been saying let me qualify it a little more .

On this forum there have been fewer than 5 dynos posted for any turbo mated to the greddy manifold/downpipe that have made more than 300whp . The highest of those being my own (T04e 57) at 333whp and Chickenwafer's (3071) at 332whp. This is some 7 years after the kit was introduced. See link . https://www.rx8club.com/series-i-major-horsepower-upgrades-93/highest-horsepower-dynos-sc-turbo-nitrous-post-them-here-180037/
And there have been a LOT of people try for better numbers.

There have been reports of better results than this but for whatever reason those people choose not to post them.

9krpmrx8

iTrader: (46)

Was yours done on one of those fancy "corrected" euro dynos?

comebackqid

iTrader: (13)

not very good with this, and I'm not very renesis turbo savvy either this is my first rotary car but I plan on going turbo after getting a spare motor and all the components with a good rebuild etc. before doing so. So I figured I'd try to help kma5783 on this search because I plan on going the greddy way too.I will try to find other upgrades besides the BNR upgrade which is looking like the best choice so far, but I found this today and wonder if this could be modified the same way as a T3071R (TX3071R) the outline is interchangable with a 3071R but it flows what a 3076R does.

http://www.034motorsport.com/turboch...o-p-21267.html

Brettus

iTrader: (2)

that would be a great choice if you can make it fit - GTX3071 and GTX3076 have both been discussed on here before at some length

Brettus

iTrader: (2)

Search Noob

kma5783

iTrader: (7)

I think there's some room for improvement, better turbine entrance angle would help, use of an external wastegate, also from what I've read a wastegate preferred manifold design is better.

9krpmrx8

iTrader: (46)