Oh and I just noticed you asked about FD housings. NO water ports and oil ports are different I believe. I was told there is a difference. This will be a 100 percent renesis besides the FD rotor's, apex, and side seals.

Ok here's my turbo... I don't even know where to begin to figure out what I have...or what to do to make mine better. you tell me what ya think and what I should do..my goal is 500 or so...maybe a little more

pull the compressor and turbine housings off. Measure the wheels, both the inner and outer diameter of both. What size compressor inlet is it? What size exhaust/downpipe outlet? That is a T4 turbine flange correct

Yes it's a T4 flange.... I'll go grab my turbo and take it apart and messure it all with pictures.

The cold side

Air in is 3 inch
exit is 2 inch
Wheel from bottom side is 3 3/8
Wheel from Top side is 3/4
Cold side housing is 6 3/4 inchs


The hot side

T4 inlet
Exit is 3 inch
Wheel from bottom is 3
Wheel from top is 5/8
Hot side housing is 6 inches

ok so I didn't know where I was suppose to measure..after I posted I started looking around and I can't figure it out. I think it may be a gt40 or blend of a gt35 and gt40. So that said here is the right measurements

compressor

85.7mm
69.85mm

Exhaust

76.2mm
63.5mm

I remember there was a guy on 8club who found out it the mazsport compared to to a T60 or T62. Dont quote me on that but its on 8club somewhere.

Yea, i was confused wondering how you got the car to go with exhaust ports in the FD housings and Renesis irons. lol.

That kick at 6k in the last section of the video is pretty sick. You have the microtech controlling the switch between 4 and 6 ports im assuming?

One of my friends is currently having a build done with all Renesis internals with stock rotors, machined to fit the RA super seals. You should look into this rather than going with lower compression rotors.

To my knowledge the lower compression rotors in the renesis will only require more Turbo than any true benefit over the stock rotors. Once again look into that option i have not actually compared results with lower compression and high compression rotors in the renesis.

If you haven't already look into porting on the irons as the triangular shape of the ports makes them prone to cracking under boost.

Ill try to look up pictures of it but if anything contact Dave at KD Rotary in PA hes the one who showed me several cases of it on the renesis.

yeah 4 vs 6 is a big difference I'd prefer power threw out vs a hard kick in.

I looked into the full seal on the rx8's but I've done bought the rx7 rotors so mind as well use them. There won't be any issues I'm pretty sure. So sure I'm throwing my money into it. Going to push her above 500.

Yes more boost for lower compression for same power. But also less heat and stress!!! there for more reliable and more power with lower compression.

Subscribing to this.

Well while subscribing you should give some
input on things as well.

I never seem to see major power differences between low compression (8.5:1) and high compression (9.4:1) dynos. The curve might be shaped a little different, but you can mitigate the effects of low compression by carefully choosing the turbo, tuning the boost control, etc. I personally wouldn't go higher than 9.0:1 rotors, not if you are already spending the money on Rx-7 rotors.

yeah I ended up with the 9:1 rotor...so what do you think about my compressor and exhaust turbines...they don't match up to a GT35 at all.. Well the one side is close just a few mm bigger....but then the other matches just under the GT40..

So I guess that would make it kinda like a GT37 but not...??????

I didn't find specs on the housing but if I'd guess I'd say I was the 1.06 AR from what I've read on the net.

OK. The Renesis is not a lover of over 500 WHP. The eccentric shaft is, how should I say this, less durable then the standard 13B shaft. It has a tendency to flex and and stay flexed. Using heavier rotors is not helping the issue either.
I would not be using any Renesis E shaft in anything over 400 WHP.

The Renesis Apex seals don't like much boost over 15 psi. I just witnessed one go the other day on the dyno. bypass valve was not functioning correctly, froze up or something like that, hit about 18 psi and pop.

On another note. Since your going high boost, I would consider making the exhaust ports open sooner. It can be done. The leading edge on the exhaust port can be ported to open sooner.

Outinnowhere

You should start a new thread with detailed build pics and info on both 8 and 7club.

Not saying you don't know what your talking about.. But I'm pretty sure I was around the 500... There are a few others that claim over 500 and aren't having any issues....

Yes I agree anything over 15 and she will pop. Higher compression, smaller seals, more heat. Yeah everything there makes it weaker on that.

As far as the shaft flexing... your the first to tell me this. I haven't heard anything about rotor slap or shaft problems. Maybe I haven't been looking up the right stuff..but thread after thread about high power I think someone besides you would of brought it up.

So tell me why do you say it flex's and has issues with that?

Mazda used a different hardening and tempering procedure with the Renesis E Shaft.

There is a post here on the RX7club from a prominent member and the issues they ran into with the Renesis E Shaft on the dyno when they hit the 500whp mark.

Anyone running the 9 to 1 rotors in place of the 10 to 1 rotors in an 8?
How does the power compare?
How does the boost limit compare?
What kind of timing does it take; does the RX8 ECU learn this?
What change does the fuel injection need? (more or less gas?)

I think you mis-measured. That is a to4E compressor housing. You cannot fit that big of a compressor wheel in there,, there just isn't enough material. It looks like a Gt35R with a to4E compressor housing.

As far as the Rx-8 eshaft flexing, there are a few people with over 500rwhp without problems, I don't really know where that is coming from...

thank you... alll I know is it isn't a stock or normal turbo lol. I know it's had stuff done to it. Yeah I'd have everything done...but I got laid offa work that's why I haven't posted or really done anything lately. But come first of the year when I get my tax return I'll have more then enough to finish everything...

Something I have thought about doing. But no one to my knowledge has yet to do it.
The RX8 ECU will learn nothing from an internal compression change. You will need an AccessPort to get the full potential of any boost increase. It will allow for tuning.


There is a discussion from Glenn at AZRR that talks about this more in depth. Don't remember where it is on the forum though.