MFslacker22

Hi guys,

I just bought a wrecked 04 RX8 and just got done fixing it at my dads shop. I've been driving it around and really like how it handles, but as everyone says, it just needs more power. I was looking up turbo kits and found the greddy kit is suppose to just bolt on and go. I have had experience with after market turbo's in the past and know they can be a pain! I was wondering if I buy this kit and just bolt it on, will it work reliably or will I need to do other things to make it run good? I will buy a BOV and a boost gauge as well. I dont plan on wanting more power later, so will I be able to bolt this on and leave it?

Thanks a lot

J.Cab

iTrader: (1)

Here are some things to read up on:

MM gives some advice on what needs to be fixed. I would definitely do #2

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/definitive-greddy-turbo-fixes-here-they-81825/

Here is another good thread by Brettus and should tell you everything you want to know.

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/getting-most-out-your-greddy-turbo-without-breaking-bank-172542/

Let me know if you need anymore help, and I will do my best.

MFslacker22

Thanks for these. Will there be a big difference in the power/drive of the car, or should I just go all out and buy kit with bigger boost?

J.Cab

iTrader: (1)

Yes there is a big difference in the car, for one TORQUE. Depends what your goals are. If this DD and only car, do you want to be necessarily be running higher boost? You can probably get like somewhere in the range of 250-275 give or take depending on your tune with the stock greddy turbo. When you say buy kit bigger boost. I thought you said in your original post that I dont plan on wanting more power later I would definitely do more research on the turbo kits out there, and then decide on how much power you are shooting for. Then start adding up the costs associate with going FI on the 8.

MFslacker22

Right. Im going to stick with the Greddy kit. Im going to buy a BOV, what is one you would recommend? Also, does the piping it comes with have a spot to put a BOV in or will i have to drill one, then weld on a mount for it?

J.Cab

iTrader: (1)

So before I get into a long post response, you are saying that you are going to keep the stock greddy turbo?

MFslacker22

Yes. I want to keep it reliable, not an all out race car.

J.Cab

iTrader: (1)

I was going post what I would do but instead just read this

pretty much nailed it pretty good as to what you will need. Or refer to his thread

https://www.rx8club.com/showthread.php?t=172542

Is there something specifically that you want to know?

J.Cab

iTrader: (1)

For a BOV I would recommend a Synchronic BOV from Synapse Engineering. I have heard good things about it, no complaints.

and to answer the question about the BOV spot on the piping. I bought my used and it was already welded on there. So I would say that you have to weld on a mount for it.

MFslacker22

OK last question (for now ). Will it be perfectly tuned out of the box? Once I add a BOV, custom CAI, BC, and an exhaust, will it need to be retuned?

J.Cab

iTrader: (1)

I wouldnt drive the car without it being tuned. So I would install everything first, then have it tuned.

Salamanth

It will most definitely not be tuned well out of the box. I highly recommend purchasing an AccessPort to reflash the stock ECU and not even trying to use the greddy eManage piggyback.

The AccessPort will allow you to retain stock-like driveability, and as an extra advantage you get a lot of valuable data from it's datalogging capability.

MazdaManiac offers a service where he will remote tune your car for you if you purchase the AccessPort directly from him, I believe he has very good maps for the greddy system already set up.

I also recommend the Synchronic BOV and the use of an AEM CAI adapted to fit the Greddy kit.

Finally, the turbo included in the greddy kit is... shall we say, not the best. Multiple upgrade services are offered, but the two main choices are the MazdaManiac 3071R upgrade which replaces the entire turbo unit as well as other miscellaneous fixes and the BNR turbo upgrade offered through the RX8Store.

The latter option also comes at a discount if you buy the full kit through them. https://www.rx8club.com/rx8store-62/bnr-greddy-turbo-upgrade-pricing-169341/

Hope that helps,
Sal

MFslacker22

Is there any kit i can just buy, then bolt on and not have to worry about buying separate parts? I understand having to tune it, but i dont really want to have to buy other parts and have to weld, ect.

thanks again for the quick and informative responses.

Salamanth

At the moment none of the turbo kits are accessport compatible besides the Greddy. At least, to the best of my knowledge.

I know PTP is investigating compatibility.

I would not recommend using a non-accessport compatible kit, it's a world of difference in driveability.

Hymee's supercharger kit and the Pettit kit are both good options for bolt-up power. I have yet to ride in a Hymee car (none in the states yet as far as I know) but the pettit stage 2 kit pulls hard as anything. They also both reflash the stock ECU (though not through the accessport).

MFslacker22

OK so here is what I should do. Correct me if anything else needs be.
1. Buy the Greddy turbo kit
2. Buy a Synchronic BOV(are these all the same or is there one special for the rx8)
3. Make a custom CAI to eliminate the intake of hot air
4. Install a vacuum nipple to the wastegate to eliminate the over boost
5. Buy a boost controller(what one would you recommend?)
6. Buy an AccessPort from mazdamaniac, get the ECU maps he recommends
7. Reprogram the stock ECU, dont use the one that comes with the Greddy Kit.

Then should I be ready to go?

Brettus

iTrader: (2)

Not a bad plan at all . 6&7 are the same thing though .
If you have the money - get the turbo upgraded as mentioned earlier .

J.Cab

iTrader: (1)

8. Upgrade greddy couplers.
9. Upgrade Ignition, not necessary but will help overall in the upper RPM's.

MFslacker22

Brettus, what boost controller is that from your install thread?

MFslacker22

Is there any place I can buy the couplers all together or will I have to buy them somewhere one by one?

J.Cab

iTrader: (1)

+1

Research the MM GT3071R upgrade, and the BNR Turbo upgrade. I went with the BNR turbo upgrade, and couldnt be happier. Bryan has great customer service, and the turn around time is really good. I am not sure if MM is still offering his upgrade.

Brettus

iTrader: (2)

Not sure which one you mean - I once had an rpm programable one which was part of a piggyback . That was an excellent thing to use in conjunction with the Greddy .
I now have a Greddy Profec spec 2 ATM but it is not nearly as good because I can't get stable boost with it .

J.Cab

iTrader: (1)

Couplers you will have to get separately. As for the Ignition Upgrade, Charles @ BHR offers it for like around $500.00. Or you can through Fluid and piece your ignition together, I am not necessarily sure if its cheaper or not. I just went ahead and got the BHR Ignition.

MFslacker22

Well after installing the nipple to eliminate the idle/stall and over boost problem, a boost controller is needed to return boost to normal. What controller does everyone here use that works well?

PhantomRX-8

iTrader: (1)

Hey J.Cab, how is that BNR turbo working out? Im still waiting for mine to come in, hope it didnt get lost. Did you run stock first?? Is there a big difference between stock and upgraded that you can feel? Can you hear the turbo spool as you drive?? As for the upgraded couplers, go to atpturbo.com to get them. They will cost 156 bucks plus 32 shipping. (Rediculous) PM if you want the sizes, I have it typed out by size, and t-bolt clamps.

PhantomRX-8

iTrader: (1)

I have a turbox/s manual boost controller. Ive used them on my DSM and they work great. Its not going to be installed till next week so Im not sure how well it will work on this kit, but it was my first choice.