6776 Ball Bearing with the H cover
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I've got one with the H cover Bob. It's not a ported shroud. I'll post a pic. Haven't run it yet. Too darn cold and salty outside.
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Yes, someone finally got one!!!
Yep, that's a BB version, you can tell due to the water coolant lines in the center of the CHRA.
The H cover has a .75 A/R where as the S cover has a .70 A/R. Yep, compressor covers have A/R number just like turbine housing do, but they don't affect spool up as much as turbine housings do. The H cover has a 4" inlet and a 3" discharge. I do believe you can get an H cover with the ported shroud as well. But being that our cars are automatics, you won't have any issues with spool up between gears like your manual trans guys do. The only benefit you would have by going with the Ported Shroud would be when you get off the gas, the compressed air now has a path to recirculate back onto itself. This will help with prolonging the life of the rotating assembly by keeping the wheels from suddenly being slammed in reverse when you let off the gas suddenly under WOT.
The turbo you see pictured here would be the Ultimate PT6776R version that technically should make the most hp of all the other 6776R models. If I were building a seriously low 10 second stock block combo, this would be the turbo I would go with.
MJRWOOD, please give us some results once you get that beast flying.
However, I'll make a prediction now, 10.03 @ 135 on 28-30psi, assuming it's a 231-235ci motor.
:biggrin:
Sweet pictures btw.
Thanks for posting up.
Patrick
Yep, that's a BB version, you can tell due to the water coolant lines in the center of the CHRA.
The H cover has a .75 A/R where as the S cover has a .70 A/R. Yep, compressor covers have A/R number just like turbine housing do, but they don't affect spool up as much as turbine housings do. The H cover has a 4" inlet and a 3" discharge. I do believe you can get an H cover with the ported shroud as well. But being that our cars are automatics, you won't have any issues with spool up between gears like your manual trans guys do. The only benefit you would have by going with the Ported Shroud would be when you get off the gas, the compressed air now has a path to recirculate back onto itself. This will help with prolonging the life of the rotating assembly by keeping the wheels from suddenly being slammed in reverse when you let off the gas suddenly under WOT.
The turbo you see pictured here would be the Ultimate PT6776R version that technically should make the most hp of all the other 6776R models. If I were building a seriously low 10 second stock block combo, this would be the turbo I would go with.
MJRWOOD, please give us some results once you get that beast flying.
However, I'll make a prediction now, 10.03 @ 135 on 28-30psi, assuming it's a 231-235ci motor.
:biggrin:
Sweet pictures btw.
Thanks for posting up.
Patrick
Turbo has balls (bearings)
I believe there is one pic here......
9 Second GN
So far I am running 30 PSI on a 224/224 with ported irons and Razor's dual nozzle @ 23 degrees. max 2 degrees KR. I have the Gen II set up @ 10.5ish on the AFR. The turbo spools like a stocker with my 3400 Vig. Made me take off my 45A which I thought would never happen! Best pass with limited traction so far was a 7 flat. (1/8th of course). The turbo spins for about 10 seconds after shut down
I believe there is one pic here......
9 Second GN
So far I am running 30 PSI on a 224/224 with ported irons and Razor's dual nozzle @ 23 degrees. max 2 degrees KR. I have the Gen II set up @ 10.5ish on the AFR. The turbo spools like a stocker with my 3400 Vig. Made me take off my 45A which I thought would never happen! Best pass with limited traction so far was a 7 flat. (1/8th of course). The turbo spins for about 10 seconds after shut down
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Holy Shnit I think I would fill my shorts! That would be awesome.
It's an ANS longblock with ported irons and a 210/210 roller cam backed by a Jimmy's full race 2004R with a 3400 vigilante. Still needs a few more odds 'n ends. My extender chip needs a rev limit update for one (hi Bob!). I'm hoping to go 10.90 @ 125 on 100 octane with maybe a little meth or alky on top, anything better than that is pure gravy.
Some more pics showing the coolant lines:
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You are correct. Moving the surge line to the left helps on diesel engines when they are operating at low engine speed and need a lot of boost (ie 25-30 PSI @ 1200 RPM). With a ported shroud the diesel can get more boost without running into compressor surge. If it surges, it falls on it's face and has to recover and that's a real drag.
On a gasoline engine the ported shroud would allow smoother part throttle operation (when there's boost). You know how our engines flutter when we try to modulate boost at part throttle? The ported shroud would reduce that, but wouldn't eliminate it.
XxDarkSidexX
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that would be a unit i am VERY interested in! so its a dual ball bearing, gt67, with an H cover, .75ar compressor side and .85 exhaust side? Thats exactly what I would like to run.
What is the going price on this currently, I am in the market for one(finally!)
darkside
What is the going price on this currently, I am in the market for one(finally!)
darkside
salvageV6
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The one pictured above certainly does. 
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For the record, all PT6776R (including any gt67s that were produced by PTE) turbos that use the Garrett dual bb cartridge, whether they have the TO4S compressor cover or the H cover are oil an water cooled. If you fail to run the turbo without water lines hooked to it, you will fry the cartridge. These bb cartridges have very small oil passages and no longer rely on the oil for removing heat from the chra like a journal bearing turbo does. Therefore they need oil and water to function properly. You will occasionally see larger Garrett bb turbos on drag strip only cars that do not have water lines run to them. Such as your single turbo GT42R applications on Sport Compact cars, or some twin turbo V8 applications. This is a big gray area as most of the time, these cars are not driven on the street and typical run times can be less that 2 minutes total time from startup to shut down, either at the end of the track or idling back to their pit.
IMO, I would run water lines to the turbo whether it was a street car or a race car. Garrett engineers wouldn't have spec'd water lines to the chras if they weren't needed.
Just my O2's worth.
Patrick
IMO, I would run water lines to the turbo whether it was a street car or a race car. Garrett engineers wouldn't have spec'd water lines to the chras if they weren't needed.
Just my O2's worth.
Patrick
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They're going for almost $1400. Add a heavy duty actuator and it's about $1500. Add the kit for the water lines and your getting close to $1600. That was 2 months ago. They were saying the price might go up for 2007.
The ball bearings are cool.... give it a twirl with your finger and she just spins and spins and spins.......
XxDarkSidexX
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i want one! I emailed all venders except cotton and quad air.
Im looking for a pte6776R dual ball bearing p trim(big shaft if they have it, but i dont think they do), 3 bolt, H cover(4"in and 3" out) with the .75 a/r compressor side and go with a .85 exhaust side. So when the GTQ wheels come out for this 67 can I upgrade later if I do get this p trim 6776R?
It fits PERFECTLY for my plans. I want to run the biggest possible turbo without going to a 70! .0030 over block, alumy gn1 heads, p&p, 1.65's, 72 injectors(might go 83 later but 72 at first), 218 cam, girlde, FAST b2b, new razor dual alky, supporting tranny and suspension mods as well. I think this is the "Ultimate" 67. Pte should call it that :biggrin:
Im looking for a pte6776R dual ball bearing p trim(big shaft if they have it, but i dont think they do), 3 bolt, H cover(4"in and 3" out) with the .75 a/r compressor side and go with a .85 exhaust side. So when the GTQ wheels come out for this 67 can I upgrade later if I do get this p trim 6776R?
It fits PERFECTLY for my plans. I want to run the biggest possible turbo without going to a 70! .0030 over block, alumy gn1 heads, p&p, 1.65's, 72 injectors(might go 83 later but 72 at first), 218 cam, girlde, FAST b2b, new razor dual alky, supporting tranny and suspension mods as well. I think this is the "Ultimate" 67. Pte should call it that :biggrin:
XxDarkSidexX
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*btw I think those pictures of the installation are freaking sweet! I pm'ed ya with a question about it!
wait I guess my real question was....if i got a pt67 gtq now so it will be a BIG SHAFT, could I upgrade to a true pt67 gtq dbb big shaft later on when garrett releases it? I think the p trim makes it a small shafter right? Well thanks, this stuff, these trims and sizings with opitions can get confusing. I would like to have a big shaft pt67 gtq h cover, then later upgrade to dbb as well, that would be sweet! Is this possible?
darkside
wait I guess my real question was....if i got a pt67 gtq now so it will be a BIG SHAFT, could I upgrade to a true pt67 gtq dbb big shaft later on when garrett releases it? I think the p trim makes it a small shafter right? Well thanks, this stuff, these trims and sizings with opitions can get confusing. I would like to have a big shaft pt67 gtq h cover, then later upgrade to dbb as well, that would be sweet! Is this possible?
darkside
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