Greddy Turbo owners thread
11-22-2010, 09:51 PM
#129
n0 pants
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edit: idk how your guys' experience was, but that sums up the entirety of it lol
11-23-2010, 05:02 PM
#136
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.
11-23-2010, 05:05 PM
#137
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.
11-23-2010, 05:49 PM
#139
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
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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
.
Last edited by TeamRX8; 11-23-2010 at 05:54 PM.
11-24-2010, 02:11 PM
#140
weeeeeeeeee
iTrader: (12)
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.
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.
11-24-2010, 02:21 PM
#141
Turbos blow!!
Join Date: Oct 2004
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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.
11-24-2010, 02:46 PM
#142
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).
.
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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.
◊ Surge Line
•Surge is the left hand boundary of the compressor map. Operation to the left of this line represents a region of flow instability. This region is characterized by mild flutter to wildly fluctuating boost and “barking” from the compressor. Continued operation within this region can lead to premature turbo failure due to heavy thrust loading.
•Surge is most commonly experienced when one of two situations exist. The first and most damaging is surge under load. It can be an indication that your compressor is too large. Surge is also commonly experienced when the throttle is quickly closed after boosting. This occurs because mass flow is drastically reduced as the throttle is closed, but the turbo is still spinning and generating boost. This immediately drives the operating point to the far left of the compressor map, right into surge.
•Surge is the left hand boundary of the compressor map. Operation to the left of this line represents a region of flow instability. This region is characterized by mild flutter to wildly fluctuating boost and “barking” from the compressor. Continued operation within this region can lead to premature turbo failure due to heavy thrust loading.
•Surge is most commonly experienced when one of two situations exist. The first and most damaging is surge under load. It can be an indication that your compressor is too large. Surge is also commonly experienced when the throttle is quickly closed after boosting. This occurs because mass flow is drastically reduced as the throttle is closed, but the turbo is still spinning and generating boost. This immediately drives the operating point to the far left of the compressor map, right into surge.
A new turbo setup can change the tune a little but all things being equal the tune you already have should still work fine .
Last edited by Brettus; 11-24-2010 at 04:27 PM.
11-24-2010, 02:49 PM
#143
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.
11-24-2010, 11:24 PM
#144
weeeeeeeeee
iTrader: (12)
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.
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.
11-25-2010, 12:18 AM
#145
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
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
Last edited by Brettus; 11-25-2010 at 12:25 AM.
11-25-2010, 09:20 AM
#146
weeeeeeeeee
iTrader: (12)
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.
I look at those diagrams and again I question how my existing tune could survive such a huge behavioral change.
Last edited by ShellDude; 11-25-2010 at 09:22 AM.
11-25-2010, 10:10 AM
#147
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.
11-25-2010, 07:34 PM
#149
Turbos blow!!
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