Refresh951's Hybrid Ultra Stroker Build
01-05-2013 | 07:38 PM
#106
Race Car
Joined: Mar 2002
Posts: 4,329
Likes: 41
Shawn, you are welcome.
Again, make sure to use Garrett's published compressor map of the GTX3576R, because it will apply better to the GTX3076R that comes with a 0.60 A/R compressor housing and not an (optional?) 0.70 A/R compressor housing as mentioned on the compressor map.
I have seen no more than 20 psi of exhaust backpressure with my GTX3076R running a 0.82 turbine housing and 18 psi of boost, so I feel that going for the largest 1.06 housing turbine might not necessarily yield better results, as we may be entering areas of the compressor map that our engines may not be efficient or well-designed enough to reach. It would seem that only a few guys running highly-strung Evos will exploit the "X" 76mm compressor wheel to its full potential, between 30 to 45 psi psi of boost, which is where the 1.06 turbine housing of the GTX3576R makes sense.
Again, make sure to use Garrett's published compressor map of the GTX3576R, because it will apply better to the GTX3076R that comes with a 0.60 A/R compressor housing and not an (optional?) 0.70 A/R compressor housing as mentioned on the compressor map.
I have seen no more than 20 psi of exhaust backpressure with my GTX3076R running a 0.82 turbine housing and 18 psi of boost, so I feel that going for the largest 1.06 housing turbine might not necessarily yield better results, as we may be entering areas of the compressor map that our engines may not be efficient or well-designed enough to reach. It would seem that only a few guys running highly-strung Evos will exploit the "X" 76mm compressor wheel to its full potential, between 30 to 45 psi psi of boost, which is where the 1.06 turbine housing of the GTX3576R makes sense.
01-05-2013 | 07:45 PM
#107
Thread Starter
Rennlist Member
Joined: Jun 2010
Posts: 3,365
Likes: 22
From: Marietta, Georgia
I have looked at the HTA a bit and I can afford it but it kind of goes against what I want to accomplish. I definitely would have to change my original cost goal. The idea behind this build it to produce reliable big power at a budget price and the GTX is already pushing it.
01-05-2013 | 08:14 PM
#108
Thread Starter
Rennlist Member
Joined: Jun 2010
Posts: 3,365
Likes: 22
From: Marietta, Georgia
Shawn, you are welcome.
Again, make sure to use Garrett's published compressor map of the GTX3576R, because it will apply better to the GTX3076R that comes with a 0.60 A/R compressor housing and not an (optional?) 0.70 A/R compressor housing as mentioned on the compressor map.
Again, make sure to use Garrett's published compressor map of the GTX3576R, because it will apply better to the GTX3076R that comes with a 0.60 A/R compressor housing and not an (optional?) 0.70 A/R compressor housing as mentioned on the compressor map.
Last edited by refresh951; 01-05-2013 at 08:32 PM.
01-05-2013 | 08:15 PM
#109
Burning Brakes
Joined: Jul 2004
Posts: 1,173
Likes: 1
From: Official Jack off extinguisher
IMO skip the Tial housings, they are pretty but the Garrett housings will outflow them as proven on several platforms.
I recommend that you do your owns fabwork, cut/fit/tack weld it with a Mig and then have a welding shop properly tig/back purge it.
I recommend that you do your owns fabwork, cut/fit/tack weld it with a Mig and then have a welding shop properly tig/back purge it.
01-05-2013 | 08:19 PM
#110
Rennlist Member
Joined: Feb 2005
Posts: 1,135
Likes: 9
From: Sydney Australia
I have looked at the HTA a bit and I can afford it but it kind of goes against what I want to accomplish. I definitely would have to change my original cost goal. The idea behind this build it to produce reliable big power at a budget price and the GTX is already pushing it.
01-10-2013 | 06:40 PM
#111
Thread Starter
Rennlist Member
Joined: Jun 2010
Posts: 3,365
Likes: 22
From: Marietta, Georgia
3L Ultra Stroker crank is done. Final stroke 3.720". Mains did not need to be ground 
. My guy used a different approach, checking crank for straightness several times and straightening when needed during the grinding process.
Because the mains will be standard, I can use the main bearings I originally purchased for the 2.85L and never used. Therefore no need to purchase expensive oversized mains ($425).
Pistons have .200" clearance with counter weights so no material needs to be removed, just a typical balance.
Turbo will be GT3582R .82 a/r with Tial turbine housing. Total cost for the turbo and turbine housing was $1500. If needed I will change the Tial housing to a 1.06 a/r.
Starting to get pretty excited about this thing...
. My guy used a different approach, checking crank for straightness several times and straightening when needed during the grinding process.Because the mains will be standard, I can use the main bearings I originally purchased for the 2.85L and never used. Therefore no need to purchase expensive oversized mains ($425).
Pistons have .200" clearance with counter weights so no material needs to be removed, just a typical balance.
Turbo will be GT3582R .82 a/r with Tial turbine housing. Total cost for the turbo and turbine housing was $1500. If needed I will change the Tial housing to a 1.06 a/r.
Starting to get pretty excited about this thing...
01-10-2013 | 09:54 PM
#115
Thread Starter
Rennlist Member
Joined: Jun 2010
Posts: 3,365
Likes: 22
From: Marietta, Georgia
01-13-2013 | 10:51 PM
#119
Thread Starter
Rennlist Member
Joined: Jun 2010
Posts: 3,365
Likes: 22
From: Marietta, Georgia
