tofu_box

Hey guys considering the Greddy Turbo, being doing some research however i still got a few question to consider in regards to the AT specific side of things

Now i heard that the Greddy *needs* the upgrade, main issue being that it runs out of breath at high rpms, wastegate issues.

Now im thinking... since our revs are limited to 7.5, and when on full auto it shifts at 7. Would the Greddy loss of breath issues be really a problem with us?

I understand i'll need a BOV, some better clamps, prob a wastegate, and BC.

But im wondering if i really need the turbo upgrade.

Basically since im located in aus, if i do choose to upgrade the turbo, i would get it before i get it shipped over.

Also i got a microtec Lt10 ecu, obviously i should replace that over the ecu from greddy, but is there going to be many troubles with it?

Just need some advice, thx

Brettus

iTrader: (2)

IMO the stock greddy suits the AT pretty well up to about 9 psi . You will still need a better turbo if you want to chase higher numbers though ....

Your LT10 will do the job but Hymee or AP are best choices for engine management - hands down

tofu_box

so you are saying if im just interested in a slight icnrease, prob run 6-8 psi. the stock is good enuff? and no need for bov/bc/clamps etc?

i wanna be safe. Dont want the turbo to fail and engine to fail.

nuke0907

iTrader: (2)

my AT revs to 9K RPM thanks to MM.

you should still get the BOV and upgraded couplers. the greddy couplers are complete crap. for the BOV, you will also need to buy a weld on flange since the is no place to mount a BOV on the stock greddy kit.

Brettus

iTrader: (2)

at that psi the stock Greddy will do nicely- you can adjust the actuator to get up to 7psi but you should still fit a BOV .

however - if you are scared about your engine failing - don't do it . I really think you need to be very hands on to get a good result with any kit and be financially prepared to blow a motor as well .....

Brettus

iTrader: (2)

don't think any AT owner has got over 200whp yet with the Greddy - could be wrong

nuke0907

iTrader: (2)

i think 09Factor is around 250WTQ.

Brettus

iTrader: (2)

you mean 250whp ? That is pretty good , does he have a dyno posted anywhere ?

nuke0907

iTrader: (2)

no i meant torque. i'll search around if he has a dyno.

tofu_box

well i'll prefer not to blow a motor, but im prepared if it will blow.

However, that beign said im not too power hungry, and therefore dont want to push everything to their absolute limit.

Brettus

iTrader: (2)

Famous last words
That's what I thought as well and i'm now at 306 whp wishing i had some more ...

nuke0907

iTrader: (2)

ok i found a thread by 09Factor with one of his early dyno runs. i'm sure he has better numbers now.

https://www.rx8club.com/series-i-specific-performance-mods-97/09factors-dyno-run-2-16-2008-a-138217/

plus now with the BNR greddy upgrade available, there is a lot more potential.

tofu_box

well better safe then sorry.

Look chances are yes, additional power prob be wanted in the future

But hey atleast i start "safe". then eventually move to.... "dangerous" that ways i can be monatry prepared for the "risks" involved.

Brettus

iTrader: (2)

I'm not saying you could not get 200 with AT - just that I have not seen it yet .
If someone knows of an AT dyno over 200 could they provide a link please .

with a 6 port MT 250-260 is easily attainable - past 270 and it gets a bit dicey.

09Factor

I have the dyno file. I'l lhave to take a screen shot of it when I get home.
The last dyno run in febuary was 202hp and 220 tq. Had some wierd issue of AFR's in the 12.5-13.1 in boost. Thinking stuck/bad injector.

The Greddy mated to a 4port probally will see max 230 - 240 9 psi
The 202 run was 7.5 psi. Let compare that to last years run of 185 hp at 5psi..
So about 10hp for every psi increase.

Now upgrade the Greddy or replace it with a 3071, or something more efficient. Yea 250 hp shouldn't be too diffacult.

The Greddy flows what 28 lbs of air or was it 32?
********************EDIT **********************************

I found my dyno plots: go here to see
https://www.rx8club.com/showpost.php...56&postcount=4