philodox

Can a Mod change the title of this thread to "Greddy Turbo Install Complete.. Details Inside!"? I think that title best describes the threads contents now. Thanks!

-Jon

Red Devil

I don't think I saw a highflow cat listed in your sig. Are you planning on running one in the future, or any concerns about leaning out the fuel system too much if you went to one? Or do you think the emanage is running rich enough to handle that alteration? I would think it would be fine, but just curious...

Video was great.

philodox

Actually, a High Flow cat and removing the resonator are in my future plans. The Turbo is a restriction in the exhaust system so the HF Cat and resonator removal would benifit a lot. I'm going to be getting the e-manage custom tuned as soon as I find out the password for it and put about 500 miles on the car to make sure things are stable as is.

FONZIE

I was thinking about this yesterday. If you port it then wouldn't you have to tweak the Air/Fuel Ratios? If the map is locked then that might be hard to do........

FONZIE

Here it is: http://www.abum.com/?show_media=3797&file_type=Movies

I love this thread! Guns and turbos! :D

bureau13

I must not understand CARB. Its venting air! Someone call Arnold, surely he'll get that repealed :D That would explain the presence of the stock BOV (they had a different name for it) on the FD though...it did in fact vent to the airbox.

jds

Jason

Yes would need to change the timing and the A/F. I can get the password thru Greddy to unlock the Emanage.

Jason

maikeru

Wow that's the video I captured and posted on the rx7 forums a few years ago. I still can't stand to see that vert destroyed.

shelleys_man_06

Whew. I finally read through the entire thread and saw the video. Congrats on your turbo philodox, and thanks for raising the bar.

twospoons_

I just bought a remote car starter for my wifes car, it has turbo cool down on it
too. $149.00 at autozone. It's a pain to install though, especially with the
rx8. (you will have to leave a key in the car for it to operate)

dmp

...which makes less than no sense, as the air the car is venting, is the same air the car is drawing from the atmosphere - just pressurized.

Damn CARB and their emissionsNazis...

:D


A word on Trannies...I'm under the impression HP doesn't kill transmissions - TORQUE kills transmissions. Say Jon's car is at the 250hp mentioned...I'd bet his torque numbers are hovering around the 200lbs-ft mark; hardly 'massive amounts'.

:D

I kept swearing I'd not TOUCH this car until the warranty was expired...dammit. I miss boost.

Japan8

You hear that Jeff (MazdaManiac)? I7d think that this would interest you quite a bit...

MazdaManiac

iTrader: (3)

Yes. I'm listening.:D

So, what is it Jason?

AQA101

Jon, are you planning to find out your new top speed? I wonder if you manage to hit redline in sixth gear now ...

(here in Germany top speed is the most often asked car attribute besides hp, whereby quartermile times are virtually unknown)

Congrats for the install and thanks for the great report!

epitrochoid

yes but the PCM doesn't know that that air is being vented, so it contiues to eject air.

~130 lbs(weight not pressure) of air through the maf will cause 10 lbs of fuel to be injected (quantities exaggerated). take some of that air out through the BOV and the computer still injects 10lbs of fuel, it doesn't know the air is gone. if 10 lbs of air come out the AFR goes from 13:1 to 12:1, which is way rich. in a recirc system the air stays in the system, just gets dumped to the low pressure side. burnt fuel is way less harmful to the air than fuel vapor.

twospoons_

A little btw, didn't the Australian car with only 7.5psi give 52% increase in hps
and 65% increase in torque?

If you are running 6.5-7psi (avg. 10% less) shouldnt you see close to 330hps
at crank?

rotarygod

Boost pressure does not determine power potential. Amount of airflow does. A smaller turbo at 7 psi is pumping alot less air than a larger turbo at 7 psi. The Greddy turbo is pretty small. I would imagine the Australian turbo would have to be considerably bigger in order to get that much from such a low boost number.

MazdaManiac

iTrader: (3)

Flow, volume, temperature and pressure. All parts of the same equation.
However, if volume, temperature and pressure are the same for two systems, the flow will be the same.

Since all of the current systems seem to be using the OEM intake manifold, if the pressure and (more importantly) temperature are the same, the flow will be the same.

The flow of the turbo is only part of all of that. A horrible turbo can be made to look like a better one with huge tubes and an enormous intercooler for small boost duty cycles.

Petrus

I L O V E T H I S T H R E A D ! ! ! ! Congrats on the install and the music coming from the engine is S W E E E E E E E E E E T...:-) I can´t wait to get my hands on this kit! My fingers are itching...

bureau13

Surely you wouldn't put the BOV after the MAF? On the FD system its not...well, there was no MAF of course. Still, I would have assumed the BOV would go before the MAF, but I'm no expert. For that matter, where does the MAF go in a system like this?

jds

RX-Nut

Oooh man, I'd get the kit in a heartbeat if it wasn't for the lack of rotary expertise in Hawaii.

One, losing the warranty scares the bejebus outta me with the lack of rotary mechs.
Two, dealers here would shun me in heartbeat even if I came in to say fix my A/C..
(ooh you got a turbo, sorry, we cant touch your car!)
Three, I'm not sure of anyone in Hawaii that is capable of a flawless install and followup service.

I might be wrong.. any Hawaii guys care to chime in? Maybe we have a "Jim" here too!

twospoons_

So what you are saying is that we should see close to 330hps as crank unless
the Aussie car had a different manifold?

epitrochoid

the maf on this sytem, like many others, is directly behind the air filter. i understand your logic, and i dont even understand why you can't just put it just before the TB but im sure there's some logical reason.

it isnt really a big deal, the emanage has a function to compensate for it and keep the mixture within range. or just use a BPV, they're more effecient anyway.

rotarygod

The key word in all of that is VOLUME. The volume or amount of air in cfm that a turbo flows is what determines power output. Pressure is irrelevant without airflow. You can compress a sealed compartment with zero airflow through it. It doesn't do the same amount of work. A larger turbo will flow a greater amount of air at the same pressure than a smaller one will. You can take a stock Turbo II RX-7, crank up the boost to 10 psi and get about 250 hp. You can change the turbo to a larger one and run 10 psi and now get nearly 350 hp with no other changes. Pressure is irrelevant. Volume isn't. If you had 2 turbos that had the same efficiency and flow capability at the same pressure, you have 2 of the same turbo.

Intercoolers can also be too small or too big. Many people have changed to enormous intercoolers on small stock turbos and lost power. This is much more prevalent at lower boost pressures.

twospoons_

So the tubing for a bigger turbo is substantially larger? (From the compressor through the intercooler and so forth)