apex8

Hi Everybody,

Just wanted to let the automatic RX8 owners know that the Greddy kit fits on the car. The e-manage would not work however, so I used my other e-manage that I had been experimenting with. I used the harness that came with the kit. Jumpers 5 and 6 inside the emanage were turned off. I am using just the additional injector map to control the 4 injectors. My initial tuning has the air/fuel ratio in the 11 range. I would like to gradually lean it out to about 11.5. The only problem is that the injectors are running at about 95%+ duty cycle. This is too high, so I am going to replace the secondary injectors with 550 cc ones from RC Engineering.
For a blow off valve, I used one from a 1993 RX7. It is plumbed between the pipe near the throttle body and the air inlet pipe coming from the air filter.
I had done some 0 - 60 mph tests before the turbo install. I averaged 8.8 seconds. After the turbo install, I averaged 6.4 seconds. These times were done by pre-loading the torque convertor by standing on the brake and gas at the same time. I plan to dyno the car after the larger injectors are installed.

Later,

Rick

PUR NRG

FYI, apex8 is Rick from Rick's Rotary. They're the guys in Pleasanton who work on RX-7s, recommended by Bern and installed my ACT flywheel. Rick has lots of experience with eManage tuning in general. The turbo'd auto is his personal car so you can be sure he's doing a meticulous job. This is Rick's first post although he's been lurking for a while.
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Coach purses

Overport

cool. it would have been nice to hear that from him though.

09Factor

There is a light at the end of the tunnel. Thanks Rick.
Also could you take a pic of the BOV near the TB?

JeRKy 8 Owner

Rick congratulations man - thatsgreat news for all of us auto owners. A 6.4 0-60 ispretty decent considering what our automatics run stock (mines around 8.1) - so atleast now you have some respectable straight line performance. I wonder how powerful it feels in the mid range. Also let us knowhow the tranny holds up

Clearly if/when I go this route itwill be w/SSRs kit.

DreRX8

Hmmm--very interesting, 6.4 consistent seconds to 60 is what the auto RX8 should have been doing in the first place--but this is the route I may go once my warranty is up. Keep us posted--and good work.

Broke_Apex_Seal

I new the auto would be fine. How does it shift? Any slippage at all?

spr grn8

Apex8, maybe you can give us a run down on any and all mods you have on your RX8. Alot of us would be interested what youv'e put together, like intake and exhaust to go with the turbo. Thanks!

PUR NRG

I don't know at what point it becomes "illegal" advertising, so I thought I'd put a plug in for him. Just from his post alone you wouldn't know he's a professional mechanic with years of experience working on rotaries--although the information content is a definite clue.
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WEED VAPORIZERS

JeRKy 8 Owner

Wait actuallyI have a question for whoever can answer this. How is it that Ricks automatic Rx8 improved over 2 seconds in its 0-60 time (went from an 8.8 to 6.4) w/the GReddy turbo kit while philodoxs manual Rx8 made a much less impressive improvement (went from 5.9 seconds to somewhere around 5.0 - 5.2 seconds)?

Why would the smaller engine make a larger gain than the bigger one w/the same exact kit?

Captain Amazing

Adding horsepower to a lower powered car will make more of adifference then adding horsepower to a higher power car. Example: adding 30hp to a 200hp engine will make a bigger difference in 1/4mile times compared to adding 30hp to a 500hp engine. Well, I think that is why there is a difference. I could be completely wrong. :o

DreRX8

Well--we would need to compare the powerbands of the two cars--but in essence I believe that the auto has more consistent performance than the manual--remember the 5.9s in the 6spd is hard to repeat consistantly. Also I think that some folks commented that due to the 4-port config they respond better to boosting--perhaps someone else can offer a more technical response.

PUR NRG

Two points to consider:
1. The stock auto has slightly more torque than the manual.
2. Diminishing returns means the next incremental increase takes more effort.
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LAMBORGHINI V8 SPECIFICATIONS

JeRKy 8 Owner

I guess itreally doesnt matter in a sense b/c even though he is technically making larger gains than the manual Rx8s are w/the same exact kit - its still not performing quite as fast as the stock manual Rx8. Wouldnt it be more beneficial to have a kit specifically designed for the automatics 4port configuration rather than using a hand me down from the manual or is that irrelevant?

PUR NRG

Which components would be different for an automatic vs. manual? Except for the larger fuel injectors kit components would be the same.
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CHRYSLER SEBRING (COUPE)

therm8

air flow wise the 4 port and 6 port engines are pretty similar up to about 7000 rpm i'd be willing to bet. When the tertiary ports open on the 6 port, that's where you'd see a difference. Therefore you should be able to get away with using the same setup.

I'd really like to see a stock dyno on a 4 port. I don't think they suffer as much from the factory tune as the 6 ports. The 6 ports are losing 20hp to that (based on a few peoples statments in other threads, don't want to get this thread hijacked with another hp discussion), I wonder if the 4 port loses anything at all. I doubt they had to cut back on power like on the 6 port for cat longevity (since they use the same cat). But what do I know :D .

JeRKy 8 Owner

Being part of the minority on this forum sure does sucks (this thread is barely getting any attention).

Anyway Im pretty sure our automatics fall somewhere in the 130 - 150 whp range.

Still not sure if buying a turbo kit for our automatics is viable though b/c if Gordons rumor ends up being true and Mazda is upgrading the automatic Rx8s to the high power engine for the 2006 model year - then youll probably have stock 2006 automatic Rx8s doing 60 in low 6s that you can trade for + warranty + everythings brandnew.

Regardless I hope Rick manages to squeeze some more power out of GReddys kit. What hes already accomplished is amazing (a 2 second improvement for less than 5grand?) but itd really be great if he could get his automatic Rx8 to match the performance of the stock manual Rx8s w/this kit. Hes almost there anyway.

DreRX8

This is true--I probably would trade mine in on the hi-power RX8 if this is true as well--especially if the SMG comes to fruition.

Phil's 8

iTrader: (3)

JeRKy 8 Owner Being part of the minority on this forum sure does sucks (this thread is barely getting any attention).


I've been following this thread since the onset and am sure that there are many others. I don't want to sound as stupid as I am about what your doing so I try and stay in the shadows. All I know is I want to go faster. PLEASE KEEP THE COURSE. I will send a little encouragement from time to time

z00m-z00m

:P cant wait to get more power out of my AT RX8 :D

DreRX8

Any new developments on this end?

CaptainZoom

The European 192 hp version has got a 5-spd manual box.
Mazda claims 7,2 sec for 0-62 mph(0-100 km/h).The only test I've seen is 7,7.
The LP hits the rpm-restrictor in 2nd gear at 104 km/h.(64,6mph)
The 5-spd man is therefore obviously faster than the 197 hp 4AT..

The Euro 231 hp 6-spd got a claimed 6,4,but best I've seen is 6,9...

JeRKy 8 Owner

Its been nearly 2 weeks since Rick (apex8) last posted anythingabout his turbo charged automatic Rx8. PUR NRG couldyou call him andask him to post an update for us?

JeRKy 8 Owner

Three weeks andstill nothing. Must have fuckedup his car or something..

arr ex eight

lol true..where are you rick?