Wow, that's the best of both worlds!

 

really ? Wonder how that works .

 

So Greddy owners. Was Turbo charging your REX worth it? I might take the plunge

 

If by worth it, you mean you're willing to put up the time, money, effort, research, hours of cursing at your car in the garage (if youre doing it yourself), possibly blowing it up, and trashing almost everything in the GReddy kit for good parts...yes.

edit: idk how your guys' experience was, but that sums up the entirety of it lol

 

yup yup... going "leaky" I suspect is going to have some impact on stft and possibly even afrs.... won't know until I try though.

 

love driving my greddy turbo'd 8

 

not on a recircd system it isn't .

 

that's good to hear... I'm hoping to avoid additional tuning.

 

me too .

However to get to that point you need :

persistence
some mechanical talent (or know someone close who has some)
lots of spare $

 

I don't have a greddy turbo...

but Turbo is worth it. just need what Brettus mentioned above.

 

Yea I have a friend. With the Greddy "MM" upgraded kit. He's willing to throw in all the gauges and AP for a ready to run purchase. Very good price. And I've also have been eyeing doublegooses kit. Idk though. My 8 is nolonger a DD. And I feel it's pretty much complete except for a huge front mount shining on that bitch lol.

 

we got bit by the same mod bug

 

Yea definitely

 

it goes without saying that preparation and planning is everything, and not just in regard to creating a successful build, but also for the unexpected catastrophy like a blown engine or transmission, moreso if this is your daily driver

BTW, Mawnees former turbo kit is back up FS .... I'd probably be more inclined to buy it than most of the other kits out there if building one yourself is out of the question


.

 

so verdict is the thrust bearing... caught it before it caused any damage. Oil flow was fine. There were a couple scuff marks on the inside of the housing where it looked like the fan was starting to rub. There's quite a bit of play on the fan itself (which is likely how I caught it early).

Have two options ... rebuild or upgrade.

Leaning towards upgrade... bnr route... add water cooling, upgraded bearings, 11 blade fan... pretty sure most here know what Bryan has to offer.

Will stick with the Synchronic BOV but will be recirculating it.

Will likely need to fall back to Jeff's base FI map and go through his calibration service given the changes in flow that the upgraded inlet and fan will be introducing.

Hopefully will have her back before xmas.

 

Stock GReddy turbo kit with fix #2. Custom intake by MazdaManiac with a boost controller, recirc hose and Cobb AP. Been going strong for 8k over 3 years. Boosting on average 8lbs. Running 10w30 non synthetic and changed every 3 months cause I only put about 3-4k a year on the car. Its nice to have effortless power. Wish I had more though.

 

How do you know oil flow was good ?
If oil was good the issue could be with surge caused by high boost / low flow at part throttle . btw you would not see this high boost unless your boost gauge was before the throttle plate .
Recircing the BOV and allowing some "leak" will help with that.

Suggest you go for the smaller 50 trim rather than the 60-1 .



A new turbo setup can change the tune a little but all things being equal the tune you already have should still work fine .

 

great . Good to hear about succesfull installs . Who did it ?

 

Flow was checked both at the return line after the turbo and prior to the inlet. I suspect it's been a "latent" problem as I'd heard a warble earlier on (very briefly right after a number of hard pulls a month or so back) and dismissed it as I was unable to reproduce it.

Also took Dave a while to recreate the "sound". It wasn't until he'd got it really heated up that he could hear the problem.

Surge very likely exacerbated the problem.

Spoke with Bryan a little later in the day to work out shipment, upgrades, etc. I'm going for reliability over performance. Will not be going with the alternate fan and will not be reaming out the inlet. Performance wise I should get back basically the same thing I sent out.

Gave Dave the order to recirc and I'll play with the BOV settings once it's back from BNR.

On a positive note, Dave says my Fuel Pressure gauge (we had been waiting for a fitting) is working fine.

 

A bigger wheel will be more efficient/lower charge temps than the stock Greddy . This is good for reliability .
If the cost is not an issue it's a no brainer IMO

again the 50 trim is a better choice than the 60-1 given the experiences of those that have had the 60-1

https://www.rx8club.com/showpost.php...78&postcount=8

 

I'll be sure to ask Bryan about it availability wise once he has my core. How could cost possibly be an issue at this point?

I look at those diagrams and again I question how my existing tune could survive such a huge behavioral change.

 

Because your existing tune (like all of my tunes) is based on mass airflow.
It doesn't care what turbo you have on it.
All of my FI calibrations are going to be useful out to close to 400 g/sec. So, as long as you don't change the actual MAF architecture*, the tune will compensate for anything you throw at it.






*Anything that disrupts or changes the MAF setup - including disassembly - can upset the tune.

 

Great... so maybe it is a cost thing after all! decisions decisions. thanks for the edumacation, guys!

 

I did the install with the actual turbo itself bring installed by Charles Hill. Also have the oil restrictor in place.

 

Great - it's well worth getting someone experienced to help with the install !