Precision 6262 Turbo - Page 4 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

dallenj · 05-13-2016, 04:16 PM

Quote:

Originally Posted by #maverick#

The Vband inlet is the same size as a t3 inlet. I ran the vband and loved it. Plus a vband is much lighter than a bulky ass t3 flange

What about the inlet diameter is 2.5" or 3" trying to find out what parts i need to mount it on my exhaust

#maverick# · 05-13-2016, 04:26 PM

Quote:

Originally Posted by dallenj

What about the inlet diameter is 2.5" or 3" trying to find out what parts i need to mount it on my exhaust

Inlet is going from header to turbo, outlet was vband as well and it was 3", run a 3" downpipe

dallenj · 05-13-2016, 04:35 PM

Quote:

Originally Posted by #maverick#

Inlet is going from header to turbo, outlet was vband as well and it was 3", run a 3" downpipe

I know the down pipe should be linked to a 3" I need to know if the up pipe to the turbo is a 2.5" v-band. I haven't really worded these questions properly sorry.

mrk1 · 05-13-2016, 09:00 PM

I have a Precision V-Band inlet flange at my shop, I can measure it tomorrow. Its certainly not 3". I use the Tial housing myself so I don't know this off hand

dallenj · 05-14-2016, 06:07 PM

Quote:

Originally Posted by mrk1

I have a Precision V-Band inlet flange at my shop, I can measure it tomorrow. Its certainly not 3". I use the Tial housing myself so I don't know this off hand

It would be great if you could do that. Thanks

Coheed · 05-14-2016, 07:16 PM

The 5858 is a great turbo. Stick with the .82ar in both setups. NON ported shroud. Without cams and a higher rev limit, the 6262 will have a more narrow powerband. But the response from that turbo is amazing for its size. Lag isn't much of an issue, but boost onset will be around 5000rpm. With a 7400rpm rev limit, this leaves you with a narrow powerband.

I'm not a fan of ported shrouds, because they negatively impact the compressor efficiency, and you can still surge with them. I'm also not a fan of too small or too large of exhaust housings. Tried them all. The .82 Vband housing is the best. Delay of boost onset might be only 2-300rpm from the .63 but it pulls much harder up top. Non-ported compressor housing and the .82 AR exhaust is best IMHO, for what it's worth.

I love the GTX3576R turbo. Water cooled center sections last longer. No debate. Precision makes great turbos, but their "air cooled" ceramic ball bearings still have pretty high failure rates. The packaging of the Garrett turbos is slightly better, the CHRA is more narrow, but it requires water cooling.

I'd be willing to bet the 6262 CEA with 16psi will get you to 500whp. But will it have a more favorable powerband to the 5858? Probably not.

#maverick# · 05-15-2016, 01:16 AM

My buddy made 500whp at 17 psi on a 5858 with p&l turbo kit

mrk1 · 05-15-2016, 07:22 AM

Garretts GTW3476 should be considered as well, its new comes in both journal and ball bearing. Cost is much closer to the precision

05-13-2016, 09:00 PM	#46
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	I have a Precision V-Band inlet flange at my shop, I can measure it tomorrow. Its certainly not 3". I use the Tial housing myself so I don't know this off hand __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

05-15-2016, 01:16 AM	#49
#maverick# Senior Member Join Date: May 2014 Drives: 2006 Pontiac GP (SOLD), 2014 FR-S Location: Chicago Posts: 378 Thanks: 296 Thanked 145 Times in 113 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	My buddy made 500whp at 17 psi on a 5858 with p&l turbo kit __________________ "Project cars are like New Years Eve. Endless preparation, hype, a sleepless night of fun, followed promptly by massive headaches and regret." - Anonymous

05-15-2016, 07:22 AM	#50
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	Garretts GTW3476 should be considered as well, its new comes in both journal and ball bearing. Cost is much closer to the precision __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

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05-14-2016, 07:16 PM	#48
Coheed Senior Member Join Date: Jun 2012 Drives: DGM BRZ Limited Location: Seattle Posts: 813 Thanks: 209 Thanked 225 Times in 157 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	The 5858 is a great turbo. Stick with the .82ar in both setups. NON ported shroud. Without cams and a higher rev limit, the 6262 will have a more narrow powerband. But the response from that turbo is amazing for its size. Lag isn't much of an issue, but boost onset will be around 5000rpm. With a 7400rpm rev limit, this leaves you with a narrow powerband. I'm not a fan of ported shrouds, because they negatively impact the compressor efficiency, and you can still surge with them. I'm also not a fan of too small or too large of exhaust housings. Tried them all. The .82 Vband housing is the best. Delay of boost onset might be only 2-300rpm from the .63 but it pulls much harder up top. Non-ported compressor housing and the .82 AR exhaust is best IMHO, for what it's worth. I love the GTX3576R turbo. Water cooled center sections last longer. No debate. Precision makes great turbos, but their "air cooled" ceramic ball bearings still have pretty high failure rates. The packaging of the Garrett turbos is slightly better, the CHRA is more narrow, but it requires water cooling. I'd be willing to bet the 6262 CEA with 16psi will get you to 500whp. But will it have a more favorable powerband to the 5858? Probably not.

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