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Greddy Turbo owners thread

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Old 11-21-2010, 11:21 PM
  #101  
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Originally Posted by Frosty288
Why would I hook a boost controller into the UIM??????

It goes from the outlet, to the BC, to the wastegate.
no - the signal line , not the line going to the solenoid .
Old 11-21-2010, 11:28 PM
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Originally Posted by Brettus
no - the signal line , not the line going to the solenoid .
That is what he described.
"Outlet [of the turbo], to the BC [solenoid], to the wastegate [actuator]".
Old 11-21-2010, 11:33 PM
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Originally Posted by MazdaManiac
That is what he described.
"Outlet [of the turbo], to the BC [solenoid], to the wastegate [actuator]".
I would have called that the control line and the one going to the boost controller as the signal line but ..................whatever ,
Old 11-22-2010, 01:01 AM
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Originally Posted by Brettus
I would have called that the control line and the one going to the boost controller as the signal line but ..................whatever ,
The "signal" line is the line going from the turbo discharge to the solenoid input.
Maybe we are saying the same thing.
It just sounds weird.
Old 11-22-2010, 01:58 AM
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Originally Posted by MazdaManiac
The "signal" line is the line going from the turbo discharge to the solenoid input.
.
If I was making up names for everything I would call that line the supply The one to the actuator the control and the one to the electronic BC the signal . That may not be convention but it seems logical to me .
Old 11-22-2010, 02:01 AM
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I usually refer to the 3 connections as:

wastegate (self explanatory), pressure source (turbo discharge), and boost signal (intake manifold)
Old 11-22-2010, 02:04 AM
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Originally Posted by NgoRX8
I usually refer to the 3 connections as:

wastegate (self explanatory), pressure source (turbo discharge), and boost signal (intake manifold)

very good ngo - why didn't i think of that ? LOL
Old 11-22-2010, 02:12 AM
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Originally Posted by Brettus
very good ngo - why didn't i think of that ? LOL
lol, if one word makes things confusing, use two!
Old 11-22-2010, 02:21 AM
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Mind you a simple diagram would have kept the post count down .....
Old 11-22-2010, 02:40 AM
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You say tomato...
Old 11-22-2010, 03:01 AM
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But who says 'potahhto'?

Nobody, that's who.

Fuckem.
Old 11-22-2010, 06:14 AM
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Lol, I greatly apologize for the confision
Old 11-22-2010, 01:41 PM
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Was hoping to get to the bottom of these early turbo failures .
Alas , I fear the plot has been lost .
Old 11-22-2010, 01:48 PM
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Originally Posted by Brettus
Was hoping to get to the bottom of these early turbo failures .
Alas , I fear the plot has been lost .
Uh, we figured that out 3 years ago.
Overspin a journal bearing turbo with improper oiling/cooling.
Old 11-22-2010, 01:53 PM
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/\ Shelldudes was still in the babying phase and Frosty's didn't sound like it did many miles either .
If guys are not getting many miles from thier turbos with the correct restrictor in place and not even pushing the turbo hard either then there has to be another issue as well .
Old 11-22-2010, 03:45 PM
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Originally Posted by Brettus
/then there has to be another issue as well .
Must be that pesky, restrictive discharge pipe.
Old 11-22-2010, 05:19 PM
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LOL - that'll be it .
Glad to see you still have a sense of humour .
Old 11-22-2010, 05:20 PM
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Originally Posted by Brettus
Glad to see you still have a sense of humour .
It is fundamental to my very existence.
Old 11-22-2010, 05:35 PM
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Some possibilities off the top of my head

*Restrictor too big or too small
*Drain too small or too long or not direct enough (ie sharp bends)
*Poor BOV setup . IE compressor able to surge due to spring set too tight
*Poor BOV/Boost control setup . IE turbo able to spool up to high pressure at low flow at part throttle.
*poor oil quality (ie no filter on supply line combined with poor oil change habits)
*oil under or overheating
*Wrong oil used
Old 11-22-2010, 06:28 PM
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sigh

Pretty sure it's a bearing... Got it delivered to KDR today via flatbed. Had the restrictor discussion with Dave.... need to talk more about the oil inlet/return. BOV is to atmosphere... Synapse... now that Dave's got it I'll likely have him recirculate it since it'll be away from home for some yet disclosed amount of time. Also considering dropping the Synapse all together. Boost has been nice and smooth from the get go... haven't had any spikes or anything like that. Oil has been 10w-40 since day one with the snail (did notice a significant increase in pressure when I cutover)... Have changed it twice in the 4000 or so miles (once at 500 and a second time a couple weeks back)... have been running RP. I keep out of boost until oil is no lower than 140.... it normally hovers between 165-180.

Last edited by ShellDude; 11-22-2010 at 06:33 PM.
Old 11-22-2010, 06:35 PM
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/\ damn man - that sucks .
Given the very short failure period I would definately lean towards an oil supply/drain issue .

Curious : how can you run VTA with the synapse / AP and not get backfire and idle issues ?
Old 11-22-2010, 06:37 PM
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I stay in auto.... it definitely gets explosive in manumatic mode, but fullly auto i've had zero issues... I am looking forward to the recirc change now that I'm over the whole "hiss" thing. I may even go with one of the alternate "leaky" settings since the blow off will be reclaimed... a known "feature" of the synapse... silly synapse says it's a benefit... go figure... hks or greddy are also definite options.

Last edited by ShellDude; 11-22-2010 at 06:39 PM.
Old 11-22-2010, 07:03 PM
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should have I have the anti-stall adapter on the synapse which solved the stall issue.
Old 11-22-2010, 07:20 PM
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Originally Posted by ShellDude
I may even go with one of the alternate "leaky" settings since the blow off will be reclaimed... a known "feature" of the synapse... silly synapse says it's a benefit... go figure... .
Could actually help with turbo life believe it or not .......
Old 11-22-2010, 08:08 PM
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With my synapse recirculated it is just as loud as when it wasn't


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