Possible New Upgrade for Greddy Turbo?
 

First off to start I know there has been tons of discussion of Turbo upgrades, from upgrading the stock greddy with a 20G or a 57 Trim Wheel, to the BNR 60-1 Upgrade to the MM GT3071R. The thing about the 3071R is we don't really know the details of the upgrade(ie: Modifications made to the turbo for it to fit, A/R Sizing and such) and from what I gather he no longer offers it. I came across this turbo while browsing ATP Turbo's site and I was curious if this is possibly a good fit for a bolt on upgrade.

Here are the specs:
Link:
http://www.atpturbo.com/mm5/merchant...egory_Code=GRT



So what do you guys think?
Any insight would be great!

You are still going to have to modify the turbine inlet flange.

We are working on a Greddy hybrid upgrade; bolt in, water cooled, billet compressor wheel, bigger turbine wheel...

I thought the Greddy Manifold was a T25 flange? Why would it have to be modified?

looks like you can order it with a 2.75in inlet.... interesting find Kyle



... and it does come with a t25 flange

interesting..

good input J :lol:

The 2.75" inlet is the compressor housing, Turblown mentioned a modification to the Turbine housing

yes I know, I was just stating that.

Oh ok... Lol

Oh for Pete's sake finish it already! :stickpoke

any plans for replacing the cast manfiold?

I came accross this a while and almost bumped some old threads on the subject for some feedback but I figured the "experts" would jump in and start fighting and just confuse the hell out of me so I just decided to go another route :)

He has a low mount manifold, I'm not sure if it is cast or not.

I should have specified. The question was for Turblown

some one here long time ago, they use the same greddy manifold, but he jsut made teh extension to the top. so you jsut need to get a new downpipe and discharge..it looks good though because he used the GT25 , somethign like that
steven

By he, I meant Turblown. Sorry for the confusion.

a bunch of people paid in advance and got strung along for 2 - 3 years, then the last couple got ripped off

what more detail do you need?

I'm aware of that whole situation, that's not what I'm referring to and it's irrelevant to this thread.

The details I was referring to were the Turbo Specs and the modifications made to the Turbo so it would physically fit in the stock Greddy location.

I was hoping to start a discussion that would lead to this information becoming readily available for all of us and to give us the option of using a GT3071R or even GT3076R with the Greddy kit. Basically we need to know the housing sizes that would physically fit, this turbo seems like a good option to me and sounds like it should fit.

Can anyone offer any insight as to why it wouldn't? Turblown mentioned a modification to the Turbine inlet would be required but why? It's a T25 Flange.

Also, can anyone comment on the AR sizing and the power potential of this particular turbo combination?

You have that backwards the T25 Flange is the inlet for the Turbine/hot side of the turbo, the compressor/cold side has a 2.75" intake, modifying or making a new section of piping to adapt it to the rest of the Greddy piping is the least of my worries, I'm more concerned with whether or not the turbo will physically fit in the Greddy location and also if the housing sizes will offer good spool characteristics and about a 325-350rwhp capability

Duh, nevermind. I have been reading so much turbo shit lately my brain is mush :lol:

Not really something we're interested in doing.

MM had to add a flange to space out the turbo fitment reasons.

I think that compressor is a little better than the stock greddy but will still be too small .

The ideal compressor wheel for the renesis for anything below 350whp is the 60-1 wheel (59mm inducer/76mm exducer) used in the BNR upgrade . The fact that nobody has made that power is more to do with the lack of understanding of the issues (or the unwillingness to deal with them) than anything else.

well that's your opinion and I have mine. You brought the subject up and it's just as relevant as his whole kit as far as I'm concerned

Oh, and next time try to search because there's no point in this thread that couldn't have been better served by bumping the one that already exists:

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/question-about-mm-greddy-turbo-upgrade-162615/

he basically welded a spacer to the turbine housing, the compressor housing will be too close or hit the Greddy exhaust manifold otherwise as he also put an insulation shield between the manifold and turbo. You can see it more clearly here:

https://www.rx8club.com/attachment.p...1&d=1328480018

https://www.rx8club.com/attachment.p...1&d=1328480020

https://www.rx8club.com/attachment.p...1&d=1328525117

.

https://www.rx8club.com/attachment.p...0&d=1328524152


https://www.rx8club.com/series-i-major-horsepower-upgrades-93/adapting-gt30r-gt35r-greddy-flanges-105690/

https://www.rx8club.com/showpost.php...73&postcount=2

http://www.s2ki.com/s2000/topic/7051...o-kit-upgrade/

http://www.s2ki.com/s2000/topic/9003...-confirmation/


not sure if there is enough room for this external WG housing?

https://www.rx8club.com/attachment.p...1&d=1328522741


http://www.atpturbo.com/mm5/merchant...egory_Code=GTH



.

LOL I know how you feel.

Thanks I see that now.

I wouldn't say it's just a little better than the stock Greddy, overall I think it's a much better option, although I do agree the 60-1 Wheel is probably an even better option.

It's not like I'm trying to promote his kit in any way just discussing the 3071R as an option, I don't agree with his business practices which is why I'm discussing this here and not contacting MM about building me a kit.

I did search I must have missed that thread, Thanks for the info.

Again, thanks for the info, it's much appreciated.

There's a lot of great stuff in that thread on the S2K board still going over everything there.

I saw that External Wastegate housing on ATP Turbo but kind of just wrote it off as I didn't think there was anywhere close to enough room to mount a External WG in that position. It looks pretty close though, possibly with a low profile wastegate, but without actually mounting it up who knows.

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.

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


.

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....

On a Renesis?

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 ....

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...

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

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...

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 ?

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 :crying:

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

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:rollingla

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

http://activerain.com/image_store/up...1677782334.JPG

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 .

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? :dunno:

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

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 :lol:

^:) haha

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.

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

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.

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

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

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

Search Noob :suspect:

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.

:lol: :hahano: