Rather than sidetracking another thread I am posting this here;


I have attached the highest hp dyno thread.
This shows our manifold with the aux ports wired open, which hurt the power curve under 7200rpms by around 20+hp/tq.

Can you tell me the exact specs on the other turbos? I am pretty sure they are either 60 trim To4Es, or 61mm turbos. The To4E cars should be spooling faster than the GT35R, and therefore making more torque than our kit down low, but are they? Nope. The 61mm turbo dyno is extremely laggy compared to ours, just look at the graph, and that is a the same compressor as a GT35R.

I am not sure what more proof you want?

If you are interested in a kit & not in a rush, I will build you both style manifolds and do a back to back.

I am also not using that size tubing anymore for the turbo manifolds, I am stepping down in size, which will help increase response. Just wait til you see a 60 trim To4E from us @ 15psi, it will beat the posted graph everywhere.

Just to be fair, my dyno graph was with a hack of a tune with no timing and sub 10 AFRs above 6k. I'm proud that I went over 300hp on my first dyno with a built in my garage setup, but its hardly worthy for any real comparisons to professionally built(and tuned) setups.

I wasn't trying to take a dig at you Mawnee. It can be hard to read into " tone " over the internet. There will never be a fair comparison unless its the same car anyhow. Dynos vary, engine compression varies, tune varies etc etc...

I think if mawnee's or SFR's setup was fully tuned with mazdamaniac then we would be able to say if the tubular one is significantly better then a log

MM did tune an SFR kit, but we have not seen the numbers from it or anything, once that car gets on the dyno then we would have more usable data, you have provided wonderful data, we just need more from others

as far as Torque your kit does very well, but brettus does not included torque in his graphs, for comparison.

Don't get me wrong I think you have a great Product, and its very unique!!!

what was the diameter of runners you used and plan to use next?

also where did the oxygen sensor end up? before or after the turbo?

oh no, no offense taken. Was just pointing out that the only graph I have posted was far from the end result of my build :)

not all log manifolds are created equal, no different than all tubular manifolds are not created equal either

Jeff

where is the best place to put the o2 sensor for the cobbs to tune for it?

I remember reading 18-24 inches away but I was curious if Before or after the turbo mattered on a top mount setup?

and with the MAF housing how much straight pipe is needed before and after it, also how far do you like it away from the turbo intake?

Thanks
Branden

In a top-mount it needs to be before the turbo.

I prefer it before the turbo, but the SFR does it at the start of the downpipe, IIRC.

From my understanding of working with rotaries(both Renesis and the old 13B) over the years is that you need to use a minimum of 2.25" piping from the front and rear rotor to feed the turbo(for maximum power ofcourse).The center port is not as big of a concern.When we designed our header,we could not figure out a way to run twin 2.25" pipes up to the turbo so we went with a log style manifold instead.Defintiely not optimum, but seems to work well:-)

We moved it to before the turbo if guys are going to be using the Cobb Access Port:worship:

Tim is awesome.
That is all.

Your awesome!

Everybody spread out.... the dick-touching is about to begin. :lol2:

lulz!

It's all good amongst friends...

it's only ghey if your swords cross.
:uhh:

:puke: :ky: Lol...im sorry..these smiley's are the best thing ever...

Our new design; 321SS double slip merge collector. Also moved down in size from Jamaals car. It should " spool " even faster..

After reading an assesment of a greddy turbo failure and causes on a the 8, i would be wery of going to much smaller. Perhaps with a bigger turbo the setup will be fine. I just cant help to think the excess heat and pressure is gonna kill the seals pretty quick.

The greddy manifold cracks because of the tight radius turns, and the turbine wheel/housings restriction. The turbo fails because the turbine wheel & housing being too small, the oil drain, and the fact that its oil cooled only. Turbine wheel and housing selection will be the restriction well before tubing size on a top mount turbo setup. Smaller tubing makes a considerable difference in boost response. We recently build an FD with a 1.15 P trim Gt35R that makes 22psi by 3400rpms! Stock engine...
Car was also doing near 600rwhp.

For those that don't understand, the double slip merge collected allows each pipe to expand individually of the others, and there is zero pre-stress on the exhaust manifold( if built correctly). Turbo manifolds that don't have this, are pre-stressed, and this leads to cracking.

So there was no excessive back preassure and heat? I have read that the internal seals on the exhaust side can fail because of excessive heat. Did it start to loose power in the top end?

My car will be put on the dyno mid February to be properly tuned. From there we will have some good numbers and data to show everyone and prove the quality of the SFR kit. As Jeff stated before, MAF housing quality proves to be very important when tuning the system, and my AFR gauge might as well be painted on when under boost. If you all want specifics on my kit look in my build thread, its in my siggy. I really wish I could be there for her first time on a dyno, but I’m in Afghanistan…

Jeff, the car will be in your hands, I'm looking for some GOOD numbers, she is built to handle it. If you want a parts list of what is on the car so you can really open her up let me know and I'll send you the sheet, aw screw it, I'll post it here...

Edit - the fuel pump, and dampener are installed, the plugs and clutch will be installed by ray before the dyno.

Pretty decent result:

https://www.rx8club.com/attachment.p...1&d=1299692069

340 hp, 260 tq. (+/- 3 or 4)

apvs closed?
I do like that that Tq number. Better start buying some rear tires:)
OD

Very nice!!!!