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Forced Induction Forum Sponsored by Active Autowerke
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Old 03-24-2012, 09:15 AM   #21
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Been considering this for awhile, DBB is not something i can afford.. i need to sell my second car lol
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Old 03-24-2012, 09:29 AM   #22
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Larry. Quick question for some reason I want to recall Jason saying he was boosting in the mid to low 30's on his last pass. Can't find it now for some reason. Have you tried this turbo on Jason's engine vs his current 67?
No sir. I do all of the testing in house. Usually on a supra 2J engine as they are plentiful here!
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Old 03-24-2012, 02:57 PM   #23
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No sir. I do all of the testing in house. Usually on a supra 2J engine as they are plentiful here!
Like a sir!
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Old 03-24-2012, 03:47 PM   #24
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hmm 64 or 67...
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Old 03-25-2012, 03:34 PM   #25
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^^^ 64 Buddy.
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Old 03-25-2012, 04:11 PM   #26
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Is the 64 ballbearing only? Were all the turbos in this comparison using the same style bearing?
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Old 03-27-2012, 09:55 AM   #27
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ya the 64 is dBB only and all the turbos compared were also dbb. bearing type wotn effect the overall power curve anyhow. Plenty of dynos only show maybe 100rpm spool difference between jb and bb on PTE turbos
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Old 03-27-2012, 11:58 AM   #28
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Is the 64 ballbearing only? Were all the turbos in this comparison using the same style bearing?

Yes all were BB
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Old 02-18-2014, 05:39 PM   #29
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what A/R's were used on all 3 turbos?
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Old 02-18-2014, 05:57 PM   #30
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what A/R's were used on all 3 turbos?
They were .81 A/R (undivided).
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Old 02-19-2014, 08:38 AM   #31
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I don't believe anyone has ran a 6466 w/ > .81 A/R on an s54 yet?
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Old 02-19-2014, 09:02 AM   #32
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We have a 6466 on our built motor E46, and we have two stock motor E46's running a 6466 as well. It is a great turbo for these cars. We are running a divided housing so the A/R is larger.
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Old 02-19-2014, 09:09 AM   #33
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We have a 6466 on our built motor E46, and we have two stock motor E46's running a 6466 as well. It is a great turbo for these cars. We are running a divided housing so the A/R is larger.
Mike- glad to hear you're running the 6466 as well- what A/R? Why do you think there hasn't really been much 'success' with this turbo on the s54 yet? When the weather gets better I need to come by the shop.
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Old 02-19-2014, 06:20 PM   #34
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We have a 6466 on our built motor E46, and we have two stock motor E46's running a 6466 as well. It is a great turbo for these cars. We are running a divided housing so the A/R is larger.
Do you have any preliminary results for the 6466 yet? Curious what you guys can do with this turbo.
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Old 02-19-2014, 07:01 PM   #35
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Originally Posted by mike@maximumpsi View Post
We have a 6466 on our built motor E46, and we have two stock motor E46's running a 6466 as well. It is a great turbo for these cars. We are running a divided housing so the A/R is larger.
Yes the A/R is larger but it's actually not when you actually consider the corrected area. Area/Radius is simply a quantitative description of the turbine housing (compressor housings have an A/R measurement too but it's nowhere near as effective of a change as the turbine housing).

In the case of a divided housing, this A/R measurement doesn't take the divided chunk of metal that runs between the whole housing into account. To properly compare the A/R of an undivided and a divided housing, you have the equal the playing field. A quick way to do this is to subtract .11 from the divided A/R to give you a rough equivalent of an undivided manifold.

Example: Take the turbine housings available for any PTE 66mm turbine wheel (6266, 6466, 6766). Then take the T4 divided 1.00 A/R as our example. The equivalent correction (again, by roughly subtracting .11) would put that 1.00 divided A/R to an equivalent .89 undivided A/R. The equivalency makes it more relatable to the T4 undivided.81 A/R. It's slightly larger but you get the idea.
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Old 02-19-2014, 09:31 PM   #36
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Originally Posted by Reid@SP View Post
Yes the A/R is larger but it's actually not when you actually consider the corrected area. Area/Radius is simply a quantitative description of the turbine housing (compressor housings have an A/R measurement too but it's nowhere near as effective of a change as the turbine housing).

In the case of a divided housing, this A/R measurement doesn't take the divided chunk of metal that runs between the whole housing into account. To properly compare the A/R of an undivided and a divided housing, you have the equal the playing field. A quick way to do this is to subtract .11 from the divided A/R to give you a rough equivalent of an undivided manifold.

Example: Take the turbine housings available for any PTE 66mm turbine wheel (6266, 6466, 6766). Then take the T4 divided 1.00 A/R as our example. The equivalent correction (again, by roughly subtracting .11) would put that 1.00 divided A/R to an equivalent .89 undivided A/R. The equivalency makes it more relatable to the T4 undivided.81 A/R. It's slightly larger but you get the idea.
Maybe I worded that wrong. I am aware of the larger divided housings flowing similar to a smaller A/R open housing from when we changed from an open manifold to a divided. We have tested every 66mm open and divided turbine housing that Precision makes on my car and the built motor car!
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Old 02-19-2014, 09:35 PM   #37
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Do you have any preliminary results for the 6466 yet? Curious what you guys can do with this turbo.
I finally have my TFX cylinder pressure equipment heading my way, so we will begin to lean on the built motor car shortly. It is an absolute beast on the street. Right now it is in the low 600whp range on pump gas.
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Old 02-19-2014, 09:36 PM   #38
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Mike- glad to hear you're running the 6466 as well- what A/R? Why do you think there hasn't really been much 'success' with this turbo on the s54 yet? When the weather gets better I need to come by the shop.
We are running the 1.15 divided housing on our stage 1 and 2 kits.
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Old 02-19-2014, 10:28 PM   #39
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I finally have my TFX cylinder pressure equipment heading my way, so we will begin to lean on the built motor car shortly. It is an absolute beast on the street. Right now it is in the low 600whp range on pump gas.
Nice! I'm not familiar with the TFX cylinder pressure equipment but from the name I think I can guess what it does lol...I'm assuming this is a pretty advanced setup used for tuning?

Keep us posted
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Old 02-19-2014, 11:27 PM   #40
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Originally Posted by mike@maximumpsi View Post
I finally have my TFX cylinder pressure equipment heading my way, so we will begin to lean on the built motor car shortly. It is an absolute beast on the street. Right now it is in the low 600whp range on pump gas.

Ur going to be making very clean power with that.... U will for sure get the most efficient power output of the s54 for any specific fuel...bar none.... Very nice... Keep the data flowing.
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